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Merge branch 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvm 

Pull kvm updates from Avi Kivity:
 "Changes include timekeeping improvements, support for assigning host
  PCI devices that share interrupt lines, s390 user-controlled guests, a
  large ppc update, and random fixes."

This is with the sign-off's fixed, hopefully next merge window we won't
have rebased commits.

* 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (130 commits)
  KVM: Convert intx_mask_lock to spin lock
  KVM: x86: fix kvm_write_tsc() TSC matching thinko
  x86: kvmclock: abstract save/restore sched_clock_state
  KVM: nVMX: Fix erroneous exception bitmap check
  KVM: Ignore the writes to MSR_K7_HWCR(3)
  KVM: MMU: make use of ->root_level in reset_rsvds_bits_mask
  KVM: PMU: add proper support for fixed counter 2
  KVM: PMU: Fix raw event check
  KVM: PMU: warn when pin control is set in eventsel msr
  KVM: VMX: Fix delayed load of shared MSRs
  KVM: use correct tlbs dirty type in cmpxchg
  KVM: Allow host IRQ sharing for assigned PCI 2.3 devices
  KVM: Ensure all vcpus are consistent with in-kernel irqchip settings
  KVM: x86 emulator: Allow PM/VM86 switch during task switch
  KVM: SVM: Fix CPL updates
  KVM: x86 emulator: VM86 segments must have DPL 3
  KVM: x86 emulator: Fix task switch privilege checks
  arch/powerpc/kvm/book3s_hv.c: included linux/sched.h twice
  KVM: x86 emulator: correctly mask pmc index bits in RDPMC instruction emulation
  KVM: mmu_notifier: Flush TLBs before releasing mmu_lock
  ...
This commit is contained in:
Linus Torvalds 2012-03-28 14:35:31 -07:00
parent d25413efa9 cf9eeac463
commit 2e7580b0e7
82 changed files with 5827 additions and 1686 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

259
Documentation/virtual/kvm/api.txt
View File

@ -95,7 +95,7 @@ described as 'basic' will be available.
Capability: basic
Architectures: all
Type: system ioctl
Parameters: none
Parameters: machine type identifier (KVM_VM_*)
Returns: a VM fd that can be used to control the new virtual machine.
The new VM has no virtual cpus and no memory. An mmap() of a VM fd
@ -103,6 +103,11 @@ will access the virtual machine's physical address space; offset zero
corresponds to guest physical address zero. Use of mmap() on a VM fd
is discouraged if userspace memory allocation (KVM_CAP_USER_MEMORY) is
available.
You most certainly want to use 0 as machine type.
In order to create user controlled virtual machines on S390, check
KVM_CAP_S390_UCONTROL and use the flag KVM_VM_S390_UCONTROL as
privileged user (CAP_SYS_ADMIN).
4.3 KVM_GET_MSR_INDEX_LIST
@ -213,6 +218,11 @@ allocation of vcpu ids. For example, if userspace wants
single-threaded guest vcpus, it should make all vcpu ids be a multiple
of the number of vcpus per vcore.
For virtual cpus that have been created with S390 user controlled virtual
machines, the resulting vcpu fd can be memory mapped at page offset
KVM_S390_SIE_PAGE_OFFSET in order to obtain a memory map of the virtual
cpu's hardware control block.
4.8 KVM_GET_DIRTY_LOG (vm ioctl)
Capability: basic
@ -1159,6 +1169,14 @@ following flags are specified:
/* Depends on KVM_CAP_IOMMU */
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
/* The following two depend on KVM_CAP_PCI_2_3 */
#define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)
#define KVM_DEV_ASSIGN_MASK_INTX (1 << 2)
If KVM_DEV_ASSIGN_PCI_2_3 is set, the kernel will manage legacy INTx interrupts
via the PCI-2.3-compliant device-level mask, thus enable IRQ sharing with other
assigned devices or host devices. KVM_DEV_ASSIGN_MASK_INTX specifies the
guest's view on the INTx mask, see KVM_ASSIGN_SET_INTX_MASK for details.
The KVM_DEV_ASSIGN_ENABLE_IOMMU flag is a mandatory option to ensure
isolation of the device. Usages not specifying this flag are deprecated.
@ -1399,6 +1417,71 @@ The following flags are defined:
If datamatch flag is set, the event will be signaled only if the written value
to the registered address is equal to datamatch in struct kvm_ioeventfd.
4.59 KVM_DIRTY_TLB
Capability: KVM_CAP_SW_TLB
Architectures: ppc
Type: vcpu ioctl
Parameters: struct kvm_dirty_tlb (in)
Returns: 0 on success, -1 on error
struct kvm_dirty_tlb {
__u64 bitmap;
__u32 num_dirty;
};
This must be called whenever userspace has changed an entry in the shared
TLB, prior to calling KVM_RUN on the associated vcpu.
The "bitmap" field is the userspace address of an array. This array
consists of a number of bits, equal to the total number of TLB entries as
determined by the last successful call to KVM_CONFIG_TLB, rounded up to the
nearest multiple of 64.
Each bit corresponds to one TLB entry, ordered the same as in the shared TLB
array.
The array is little-endian: the bit 0 is the least significant bit of the
first byte, bit 8 is the least significant bit of the second byte, etc.
This avoids any complications with differing word sizes.
The "num_dirty" field is a performance hint for KVM to determine whether it
should skip processing the bitmap and just invalidate everything. It must
be set to the number of set bits in the bitmap.
4.60 KVM_ASSIGN_SET_INTX_MASK
Capability: KVM_CAP_PCI_2_3
Architectures: x86
Type: vm ioctl
Parameters: struct kvm_assigned_pci_dev (in)
Returns: 0 on success, -1 on error
Allows userspace to mask PCI INTx interrupts from the assigned device. The
kernel will not deliver INTx interrupts to the guest between setting and
clearing of KVM_ASSIGN_SET_INTX_MASK via this interface. This enables use of
and emulation of PCI 2.3 INTx disable command register behavior.
This may be used for both PCI 2.3 devices supporting INTx disable natively and
older devices lacking this support. Userspace is responsible for emulating the
read value of the INTx disable bit in the guest visible PCI command register.
When modifying the INTx disable state, userspace should precede updating the
physical device command register by calling this ioctl to inform the kernel of
the new intended INTx mask state.
Note that the kernel uses the device INTx disable bit to internally manage the
device interrupt state for PCI 2.3 devices. Reads of this register may
therefore not match the expected value. Writes should always use the guest
intended INTx disable value rather than attempting to read-copy-update the
current physical device state. Races between user and kernel updates to the
INTx disable bit are handled lazily in the kernel. It's possible the device
may generate unintended interrupts, but they will not be injected into the
guest.
See KVM_ASSIGN_DEV_IRQ for the data structure. The target device is specified
by assigned_dev_id. In the flags field, only KVM_DEV_ASSIGN_MASK_INTX is
evaluated.
4.62 KVM_CREATE_SPAPR_TCE
Capability: KVM_CAP_SPAPR_TCE
@ -1491,6 +1574,101 @@ following algorithm:
Some guests configure the LINT1 NMI input to cause a panic, aiding in
debugging.
4.65 KVM_S390_UCAS_MAP
Capability: KVM_CAP_S390_UCONTROL
Architectures: s390
Type: vcpu ioctl
Parameters: struct kvm_s390_ucas_mapping (in)
Returns: 0 in case of success
The parameter is defined like this:
struct kvm_s390_ucas_mapping {
__u64 user_addr;
__u64 vcpu_addr;
__u64 length;
};
This ioctl maps the memory at "user_addr" with the length "length" to
the vcpu's address space starting at "vcpu_addr". All parameters need to
be alligned by 1 megabyte.
4.66 KVM_S390_UCAS_UNMAP
Capability: KVM_CAP_S390_UCONTROL
Architectures: s390
Type: vcpu ioctl
Parameters: struct kvm_s390_ucas_mapping (in)
Returns: 0 in case of success
The parameter is defined like this:
struct kvm_s390_ucas_mapping {
__u64 user_addr;
__u64 vcpu_addr;
__u64 length;
};
This ioctl unmaps the memory in the vcpu's address space starting at
"vcpu_addr" with the length "length". The field "user_addr" is ignored.
All parameters need to be alligned by 1 megabyte.
4.67 KVM_S390_VCPU_FAULT
Capability: KVM_CAP_S390_UCONTROL
Architectures: s390
Type: vcpu ioctl
Parameters: vcpu absolute address (in)
Returns: 0 in case of success
This call creates a page table entry on the virtual cpu's address space
(for user controlled virtual machines) or the virtual machine's address
space (for regular virtual machines). This only works for minor faults,
thus it's recommended to access subject memory page via the user page
table upfront. This is useful to handle validity intercepts for user
controlled virtual machines to fault in the virtual cpu's lowcore pages
prior to calling the KVM_RUN ioctl.
4.68 KVM_SET_ONE_REG
Capability: KVM_CAP_ONE_REG
Architectures: all
Type: vcpu ioctl
Parameters: struct kvm_one_reg (in)
Returns: 0 on success, negative value on failure
struct kvm_one_reg {
__u64 id;
__u64 addr;
};
Using this ioctl, a single vcpu register can be set to a specific value
defined by user space with the passed in struct kvm_one_reg, where id
refers to the register identifier as described below and addr is a pointer
to a variable with the respective size. There can be architecture agnostic
and architecture specific registers. Each have their own range of operation
and their own constants and width. To keep track of the implemented
registers, find a list below:
Arch | Register | Width (bits)
| |
PPC | KVM_REG_PPC_HIOR | 64
4.69 KVM_GET_ONE_REG
Capability: KVM_CAP_ONE_REG
Architectures: all
Type: vcpu ioctl
Parameters: struct kvm_one_reg (in and out)
Returns: 0 on success, negative value on failure
This ioctl allows to receive the value of a single register implemented
in a vcpu. The register to read is indicated by the "id" field of the
kvm_one_reg struct passed in. On success, the register value can be found
at the memory location pointed to by "addr".
The list of registers accessible using this interface is identical to the
list in 4.64.
5. The kvm_run structure
Application code obtains a pointer to the kvm_run structure by
@ -1651,6 +1829,20 @@ s390 specific.
s390 specific.
/* KVM_EXIT_S390_UCONTROL */
struct {
__u64 trans_exc_code;
__u32 pgm_code;
} s390_ucontrol;
s390 specific. A page fault has occurred for a user controlled virtual
machine (KVM_VM_S390_UNCONTROL) on it's host page table that cannot be
resolved by the kernel.
The program code and the translation exception code that were placed
in the cpu's lowcore are presented here as defined by the z Architecture
Principles of Operation Book in the Chapter for Dynamic Address Translation
(DAT)
/* KVM_EXIT_DCR */
struct {
__u32 dcrn;
@ -1693,6 +1885,29 @@ developer registration required to access it).
/* Fix the size of the union. */
char padding[256];
};
/*
* shared registers between kvm and userspace.
* kvm_valid_regs specifies the register classes set by the host
* kvm_dirty_regs specified the register classes dirtied by userspace
* struct kvm_sync_regs is architecture specific, as well as the
* bits for kvm_valid_regs and kvm_dirty_regs
*/
__u64 kvm_valid_regs;
__u64 kvm_dirty_regs;
union {
struct kvm_sync_regs regs;
char padding[1024];
} s;
If KVM_CAP_SYNC_REGS is defined, these fields allow userspace to access
certain guest registers without having to call SET/GET_*REGS. Thus we can
avoid some system call overhead if userspace has to handle the exit.
Userspace can query the validity of the structure by checking
kvm_valid_regs for specific bits. These bits are architecture specific
and usually define the validity of a groups of registers. (e.g. one bit
for general purpose registers)
};
6. Capabilities that can be enabled
@ -1741,3 +1956,45 @@ HTAB address part of SDR1 contains an HVA instead of a GPA, as PAPR keeps the
HTAB invisible to the guest.
When this capability is enabled, KVM_EXIT_PAPR_HCALL can occur.
6.3 KVM_CAP_SW_TLB
Architectures: ppc
Parameters: args[0] is the address of a struct kvm_config_tlb
Returns: 0 on success; -1 on error
struct kvm_config_tlb {
__u64 params;
__u64 array;
__u32 mmu_type;
__u32 array_len;
};
Configures the virtual CPU's TLB array, establishing a shared memory area
between userspace and KVM. The "params" and "array" fields are userspace
addresses of mmu-type-specific data structures. The "array_len" field is an
safety mechanism, and should be set to the size in bytes of the memory that
userspace has reserved for the array. It must be at least the size dictated
by "mmu_type" and "params".
While KVM_RUN is active, the shared region is under control of KVM. Its
contents are undefined, and any modification by userspace results in
boundedly undefined behavior.
On return from KVM_RUN, the shared region will reflect the current state of
the guest's TLB. If userspace makes any changes, it must call KVM_DIRTY_TLB
to tell KVM which entries have been changed, prior to calling KVM_RUN again
on this vcpu.
For mmu types KVM_MMU_FSL_BOOKE_NOHV and KVM_MMU_FSL_BOOKE_HV:
- The "params" field is of type "struct kvm_book3e_206_tlb_params".
- The "array" field points to an array of type "struct
kvm_book3e_206_tlb_entry".
- The array consists of all entries in the first TLB, followed by all
entries in the second TLB.
- Within a TLB, entries are ordered first by increasing set number. Within a
set, entries are ordered by way (increasing ESEL).
- The hash for determining set number in TLB0 is: (MAS2 >> 12) & (num_sets - 1)
where "num_sets" is the tlb_sizes[] value divided by the tlb_ways[] value.
- The tsize field of mas1 shall be set to 4K on TLB0, even though the
hardware ignores this value for TLB0.

24
Documentation/virtual/kvm/ppc-pv.txt
View File

@ -81,28 +81,8 @@ additional registers to the magic page. If you add fields to the magic page,
also define a new hypercall feature to indicate that the host can give you more
registers. Only if the host supports the additional features, make use of them.
The magic page has the following layout as described in
arch/powerpc/include/asm/kvm_para.h:
struct kvm_vcpu_arch_shared {
__u64 scratch1;
__u64 scratch2;
__u64 scratch3;
__u64 critical; /* Guest may not get interrupts if == r1 */
__u64 sprg0;
__u64 sprg1;
__u64 sprg2;
__u64 sprg3;
__u64 srr0;
__u64 srr1;
__u64 dar;
__u64 msr;
__u32 dsisr;
__u32 int_pending; /* Tells the guest if we have an interrupt */
};
Additions to the page must only occur at the end. Struct fields are always 32
or 64 bit aligned, depending on them being 32 or 64 bit wide respectively.
The magic page layout is described by struct kvm_vcpu_arch_shared
in arch/powerpc/include/asm/kvm_para.h.
Magic page features
===================

4
arch/ia64/include/asm/kvm.h
View File

@ -261,4 +261,8 @@ struct kvm_debug_exit_arch {
struct kvm_guest_debug_arch {
};
/* definition of registers in kvm_run */
struct kvm_sync_regs {
};
#endif

3
arch/ia64/include/asm/kvm_host.h
View File

@ -459,6 +459,9 @@ struct kvm_sal_data {
unsigned long boot_gp;
};
struct kvm_arch_memory_slot {
};
struct kvm_arch {
spinlock_t dirty_log_lock;

25
arch/ia64/kvm/kvm-ia64.c
View File

@ -809,10 +809,13 @@ static void kvm_build_io_pmt(struct kvm *kvm)
#define GUEST_PHYSICAL_RR4 0x2739
#define VMM_INIT_RR 0x1660
int kvm_arch_init_vm(struct kvm *kvm)
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
BUG_ON(!kvm);
if (type)
return -EINVAL;
kvm->arch.is_sn2 = ia64_platform_is("sn2");
kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
@ -1169,6 +1172,11 @@ static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
#define PALE_RESET_ENTRY 0x80000000ffffffb0UL
bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu)
{
return irqchip_in_kernel(vcpu->kcm) == (vcpu->arch.apic != NULL);
}
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
struct kvm_vcpu *v;
@ -1563,6 +1571,21 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
return r;
}
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
return VM_FAULT_SIGBUS;
}
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
}
int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
{
return 0;
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_memory_slot old,

46
arch/powerpc/include/asm/kvm.h
View File

@ -265,12 +265,9 @@ struct kvm_debug_exit_arch {
struct kvm_guest_debug_arch {
};
#define KVM_REG_MASK 0x001f
#define KVM_REG_EXT_MASK 0xffe0
#define KVM_REG_GPR 0x0000
#define KVM_REG_FPR 0x0020
#define KVM_REG_QPR 0x0040
#define KVM_REG_FQPR 0x0060
/* definition of registers in kvm_run */
struct kvm_sync_regs {
};
#define KVM_INTERRUPT_SET -1U
#define KVM_INTERRUPT_UNSET -2U
@ -292,4 +289,41 @@ struct kvm_allocate_rma {
__u64 rma_size;
};
struct kvm_book3e_206_tlb_entry {
__u32 mas8;
__u32 mas1;
__u64 mas2;
__u64 mas7_3;
};
struct kvm_book3e_206_tlb_params {
/*
* For mmu types KVM_MMU_FSL_BOOKE_NOHV and KVM_MMU_FSL_BOOKE_HV:
*
* - The number of ways of TLB0 must be a power of two between 2 and
* 16.
* - TLB1 must be fully associative.
* - The size of TLB0 must be a multiple of the number of ways, and
* the number of sets must be a power of two.
* - The size of TLB1 may not exceed 64 entries.
* - TLB0 supports 4 KiB pages.
* - The page sizes supported by TLB1 are as indicated by
* TLB1CFG (if MMUCFG[MAVN] = 0) or TLB1PS (if MMUCFG[MAVN] = 1)
* as returned by KVM_GET_SREGS.
* - TLB2 and TLB3 are reserved, and their entries in tlb_sizes[]
* and tlb_ways[] must be zero.
*
* tlb_ways[n] = tlb_sizes[n] means the array is fully associative.
*
* KVM will adjust TLBnCFG based on the sizes configured here,
* though arrays greater than 2048 entries will have TLBnCFG[NENTRY]
* set to zero.
*/
__u32 tlb_sizes[4];
__u32 tlb_ways[4];
__u32 reserved[8];
};
#define KVM_REG_PPC_HIOR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x1)
#endif /* __LINUX_KVM_POWERPC_H */

98
arch/powerpc/include/asm/kvm_book3s.h
View File

@ -90,6 +90,8 @@ struct kvmppc_vcpu_book3s {
#endif
int context_id[SID_CONTEXTS];
bool hior_explicit; /* HIOR is set by ioctl, not PVR */
struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
@ -119,6 +121,11 @@ extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
struct kvm_vcpu *vcpu, unsigned long addr,
unsigned long status);
extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
unsigned long slb_v, unsigned long valid);
extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
@ -138,6 +145,21 @@ extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
extern pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
unsigned long *rmap, long pte_index, int realmode);
extern void kvmppc_invalidate_hpte(struct kvm *kvm, unsigned long *hptep,
unsigned long pte_index);
void kvmppc_clear_ref_hpte(struct kvm *kvm, unsigned long *hptep,
unsigned long pte_index);
extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
unsigned long *nb_ret);
extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr);
extern long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
long pte_index, unsigned long pteh, unsigned long ptel);
extern long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
long pte_index, unsigned long pteh, unsigned long ptel);
extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
struct kvm_memory_slot *memslot);
extern void kvmppc_entry_trampoline(void);
extern void kvmppc_hv_entry_trampoline(void);
@ -183,7 +205,9 @@ static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
{
if ( num < 14 ) {
to_svcpu(vcpu)->gpr[num] = val;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
svcpu->gpr[num] = val;
svcpu_put(svcpu);
to_book3s(vcpu)->shadow_vcpu->gpr[num] = val;
} else
vcpu->arch.gpr[num] = val;
@ -191,80 +215,120 @@ static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
{
if ( num < 14 )
return to_svcpu(vcpu)->gpr[num];
else
if ( num < 14 ) {
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
ulong r = svcpu->gpr[num];
svcpu_put(svcpu);
return r;
} else
return vcpu->arch.gpr[num];
}
static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
{
to_svcpu(vcpu)->cr = val;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
svcpu->cr = val;
svcpu_put(svcpu);
to_book3s(vcpu)->shadow_vcpu->cr = val;
}
static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
{
return to_svcpu(vcpu)->cr;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
u32 r;
r = svcpu->cr;
svcpu_put(svcpu);
return r;
}
static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
{
to_svcpu(vcpu)->xer = val;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
svcpu->xer = val;
to_book3s(vcpu)->shadow_vcpu->xer = val;
svcpu_put(svcpu);
}
static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
{
return to_svcpu(vcpu)->xer;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
u32 r;
r = svcpu->xer;
svcpu_put(svcpu);
return r;
}
static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
{
to_svcpu(vcpu)->ctr = val;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
svcpu->ctr = val;
svcpu_put(svcpu);
}
static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
{
return to_svcpu(vcpu)->ctr;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
ulong r;
r = svcpu->ctr;
svcpu_put(svcpu);
return r;
}
static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
{
to_svcpu(vcpu)->lr = val;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
svcpu->lr = val;
svcpu_put(svcpu);
}
static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
{
return to_svcpu(vcpu)->lr;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
ulong r;
r = svcpu->lr;
svcpu_put(svcpu);
return r;
}
static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
{
to_svcpu(vcpu)->pc = val;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
svcpu->pc = val;
svcpu_put(svcpu);
}
static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
{
return to_svcpu(vcpu)->pc;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
ulong r;
r = svcpu->pc;
svcpu_put(svcpu);
return r;
}
static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
{
ulong pc = kvmppc_get_pc(vcpu);
struct kvmppc_book3s_shadow_vcpu *svcpu = to_svcpu(vcpu);
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
u32 r;
/* Load the instruction manually if it failed to do so in the
* exit path */
if (svcpu->last_inst == KVM_INST_FETCH_FAILED)
kvmppc_ld(vcpu, &pc, sizeof(u32), &svcpu->last_inst, false);
return svcpu->last_inst;
r = svcpu->last_inst;
svcpu_put(svcpu);
return r;
}
static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
{
return to_svcpu(vcpu)->fault_dar;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
ulong r;
r = svcpu->fault_dar;
svcpu_put(svcpu);
return r;
}
static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)

6
arch/powerpc/include/asm/kvm_book3s_32.h
View File

@ -20,11 +20,15 @@
#ifndef __ASM_KVM_BOOK3S_32_H__
#define __ASM_KVM_BOOK3S_32_H__
static inline struct kvmppc_book3s_shadow_vcpu *to_svcpu(struct kvm_vcpu *vcpu)
static inline struct kvmppc_book3s_shadow_vcpu *svcpu_get(struct kvm_vcpu *vcpu)
{
return to_book3s(vcpu)->shadow_vcpu;
}
static inline void svcpu_put(struct kvmppc_book3s_shadow_vcpu *svcpu)
{
}
#define PTE_SIZE 12
#define VSID_ALL 0
#define SR_INVALID 0x00000001 /* VSID 1 should always be unused */

180
arch/powerpc/include/asm/kvm_book3s_64.h
View File

@ -21,14 +21,56 @@
#define __ASM_KVM_BOOK3S_64_H__
#ifdef CONFIG_KVM_BOOK3S_PR
static inline struct kvmppc_book3s_shadow_vcpu *to_svcpu(struct kvm_vcpu *vcpu)
static inline struct kvmppc_book3s_shadow_vcpu *svcpu_get(struct kvm_vcpu *vcpu)
{
preempt_disable();
return &get_paca()->shadow_vcpu;
}
static inline void svcpu_put(struct kvmppc_book3s_shadow_vcpu *svcpu)
{
preempt_enable();
}
#endif
#define SPAPR_TCE_SHIFT 12
#ifdef CONFIG_KVM_BOOK3S_64_HV
/* For now use fixed-size 16MB page table */
#define HPT_ORDER 24
#define HPT_NPTEG (1ul << (HPT_ORDER - 7)) /* 128B per pteg */
#define HPT_NPTE (HPT_NPTEG << 3) /* 8 PTEs per PTEG */
#define HPT_HASH_MASK (HPT_NPTEG - 1)
#endif
#define VRMA_VSID 0x1ffffffUL /* 1TB VSID reserved for VRMA */
/*
* We use a lock bit in HPTE dword 0 to synchronize updates and
* accesses to each HPTE, and another bit to indicate non-present
* HPTEs.
*/
#define HPTE_V_HVLOCK 0x40UL
#define HPTE_V_ABSENT 0x20UL
static inline long try_lock_hpte(unsigned long *hpte, unsigned long bits)
{
unsigned long tmp, old;
asm volatile(" ldarx %0,0,%2\n"
" and. %1,%0,%3\n"
" bne 2f\n"
" ori %0,%0,%4\n"
" stdcx. %0,0,%2\n"
" beq+ 2f\n"
" li %1,%3\n"
"2: isync"
: "=&r" (tmp), "=&r" (old)
: "r" (hpte), "r" (bits), "i" (HPTE_V_HVLOCK)
: "cc", "memory");
return old == 0;
}
static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r,
unsigned long pte_index)
{
@ -62,4 +104,140 @@ static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r,
return rb;
}
static inline unsigned long hpte_page_size(unsigned long h, unsigned long l)
{
/* only handle 4k, 64k and 16M pages for now */
if (!(h & HPTE_V_LARGE))
return 1ul << 12; /* 4k page */
if ((l & 0xf000) == 0x1000 && cpu_has_feature(CPU_FTR_ARCH_206))
return 1ul << 16; /* 64k page */
if ((l & 0xff000) == 0)
return 1ul << 24; /* 16M page */
return 0; /* error */
}
static inline unsigned long hpte_rpn(unsigned long ptel, unsigned long psize)
{
return ((ptel & HPTE_R_RPN) & ~(psize - 1)) >> PAGE_SHIFT;
}
static inline int hpte_is_writable(unsigned long ptel)
{
unsigned long pp = ptel & (HPTE_R_PP0 | HPTE_R_PP);
return pp != PP_RXRX && pp != PP_RXXX;
}
static inline unsigned long hpte_make_readonly(unsigned long ptel)
{
if ((ptel & HPTE_R_PP0) || (ptel & HPTE_R_PP) == PP_RWXX)
ptel = (ptel & ~HPTE_R_PP) | PP_RXXX;
else
ptel |= PP_RXRX;
return ptel;
}
static inline int hpte_cache_flags_ok(unsigned long ptel, unsigned long io_type)
{
unsigned int wimg = ptel & HPTE_R_WIMG;
/* Handle SAO */
if (wimg == (HPTE_R_W | HPTE_R_I | HPTE_R_M) &&
cpu_has_feature(CPU_FTR_ARCH_206))
wimg = HPTE_R_M;
if (!io_type)
return wimg == HPTE_R_M;
return (wimg & (HPTE_R_W | HPTE_R_I)) == io_type;
}
/*
* Lock and read a linux PTE. If it's present and writable, atomically
* set dirty and referenced bits and return the PTE, otherwise return 0.
*/
static inline pte_t kvmppc_read_update_linux_pte(pte_t *p, int writing)
{
pte_t pte, tmp;
/* wait until _PAGE_BUSY is clear then set it atomically */
__asm__ __volatile__ (
"1: ldarx %0,0,%3\n"
" andi. %1,%0,%4\n"
" bne- 1b\n"
" ori %1,%0,%4\n"
" stdcx. %1,0,%3\n"
" bne- 1b"
: "=&r" (pte), "=&r" (tmp), "=m" (*p)
: "r" (p), "i" (_PAGE_BUSY)
: "cc");
if (pte_present(pte)) {
pte = pte_mkyoung(pte);
if (writing && pte_write(pte))
pte = pte_mkdirty(pte);
}
*p = pte; /* clears _PAGE_BUSY */
return pte;
}
/* Return HPTE cache control bits corresponding to Linux pte bits */
static inline unsigned long hpte_cache_bits(unsigned long pte_val)
{
#if _PAGE_NO_CACHE == HPTE_R_I && _PAGE_WRITETHRU == HPTE_R_W
return pte_val & (HPTE_R_W | HPTE_R_I);
#else
return ((pte_val & _PAGE_NO_CACHE) ? HPTE_R_I : 0) +
((pte_val & _PAGE_WRITETHRU) ? HPTE_R_W : 0);
#endif
}
static inline bool hpte_read_permission(unsigned long pp, unsigned long key)
{
if (key)
return PP_RWRX <= pp && pp <= PP_RXRX;
return 1;
}
static inline bool hpte_write_permission(unsigned long pp, unsigned long key)
{
if (key)
return pp == PP_RWRW;
return pp <= PP_RWRW;
}
static inline int hpte_get_skey_perm(unsigned long hpte_r, unsigned long amr)
{
unsigned long skey;
skey = ((hpte_r & HPTE_R_KEY_HI) >> 57) |
((hpte_r & HPTE_R_KEY_LO) >> 9);
return (amr >> (62 - 2 * skey)) & 3;
}
static inline void lock_rmap(unsigned long *rmap)
{
do {
while (test_bit(KVMPPC_RMAP_LOCK_BIT, rmap))
cpu_relax();
} while (test_and_set_bit_lock(KVMPPC_RMAP_LOCK_BIT, rmap));
}
static inline void unlock_rmap(unsigned long *rmap)
{
__clear_bit_unlock(KVMPPC_RMAP_LOCK_BIT, rmap);
}
static inline bool slot_is_aligned(struct kvm_memory_slot *memslot,
unsigned long pagesize)
{
unsigned long mask = (pagesize >> PAGE_SHIFT) - 1;
if (pagesize <= PAGE_SIZE)
return 1;
return !(memslot->base_gfn & mask) && !(memslot->npages & mask);
}
#endif /* __ASM_KVM_BOOK3S_64_H__ */

52
arch/powerpc/include/asm/kvm_e500.h
View File

@ -22,46 +22,55 @@
#define E500_PID_NUM 3
#define E500_TLB_NUM 2
struct tlbe{
u32 mas1;
u32 mas2;
u32 mas3;
u32 mas7;
};
#define E500_TLB_VALID 1
#define E500_TLB_DIRTY 2
struct tlbe_priv {
struct tlbe_ref {
pfn_t pfn;
unsigned int flags; /* E500_TLB_* */
};
struct tlbe_priv {
struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */
};
struct vcpu_id_table;
struct kvmppc_e500_tlb_params {
int entries, ways, sets;
};
struct kvmppc_vcpu_e500 {
/* Unmodified copy of the guest's TLB. */
struct tlbe *gtlb_arch[E500_TLB_NUM];
/* Unmodified copy of the guest's TLB -- shared with host userspace. */
struct kvm_book3e_206_tlb_entry *gtlb_arch;
/* Starting entry number in gtlb_arch[] */
int gtlb_offset[E500_TLB_NUM];
/* KVM internal information associated with each guest TLB entry */
struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
unsigned int gtlb_size[E500_TLB_NUM];
struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
unsigned int gtlb_nv[E500_TLB_NUM];
/*
* information associated with each host TLB entry --
* TLB1 only for now. If/when guest TLB1 entries can be
* mapped with host TLB0, this will be used for that too.
*
* We don't want to use this for guest TLB0 because then we'd
* have the overhead of doing the translation again even if
* the entry is still in the guest TLB (e.g. we swapped out
* and back, and our host TLB entries got evicted).
*/
struct tlbe_ref *tlb_refs[E500_TLB_NUM];
unsigned int host_tlb1_nv;
u32 host_pid[E500_PID_NUM];
u32 pid[E500_PID_NUM];
u32 svr;
u32 mas0;
u32 mas1;
u32 mas2;
u32 mas3;
u32 mas4;
u32 mas5;
u32 mas6;
u32 mas7;
/* vcpu id table */
struct vcpu_id_table *idt;
@ -73,6 +82,9 @@ struct kvmppc_vcpu_e500 {
u32 tlb1cfg;
u64 mcar;
struct page **shared_tlb_pages;
int num_shared_tlb_pages;
struct kvm_vcpu vcpu;
};

90
arch/powerpc/include/asm/kvm_host.h
View File

@ -32,17 +32,32 @@
#include <linux/atomic.h>
#include <asm/kvm_asm.h>
#include <asm/processor.h>
#include <asm/page.h>
#define KVM_MAX_VCPUS NR_CPUS
#define KVM_MAX_VCORES NR_CPUS
#define KVM_MEMORY_SLOTS 32
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 4
#define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
#ifdef CONFIG_KVM_MMIO
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#endif
#ifdef CONFIG_KVM_BOOK3S_64_HV
#include <linux/mmu_notifier.h>
#define KVM_ARCH_WANT_MMU_NOTIFIER
struct kvm;
extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
extern int kvm_age_hva(struct kvm *kvm, unsigned long hva);
extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
#endif
/* We don't currently support large pages. */
#define KVM_HPAGE_GFN_SHIFT(x) 0
#define KVM_NR_PAGE_SIZES 1
@ -158,34 +173,72 @@ struct kvmppc_spapr_tce_table {
struct page *pages[0];
};
struct kvmppc_rma_info {
struct kvmppc_linear_info {
void *base_virt;
unsigned long base_pfn;
unsigned long npages;
struct list_head list;
atomic_t use_count;
atomic_t use_count;
int type;
};
/*
* The reverse mapping array has one entry for each HPTE,
* which stores the guest's view of the second word of the HPTE
* (including the guest physical address of the mapping),
* plus forward and backward pointers in a doubly-linked ring
* of HPTEs that map the same host page. The pointers in this
* ring are 32-bit HPTE indexes, to save space.
*/
struct revmap_entry {
unsigned long guest_rpte;
unsigned int forw, back;
};
/*
* We use the top bit of each memslot->rmap entry as a lock bit,
* and bit 32 as a present flag. The bottom 32 bits are the
* index in the guest HPT of a HPTE that points to the page.
*/
#define KVMPPC_RMAP_LOCK_BIT 63
#define KVMPPC_RMAP_RC_SHIFT 32
#define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT)
#define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT)
#define KVMPPC_RMAP_PRESENT 0x100000000ul
#define KVMPPC_RMAP_INDEX 0xfffffffful
/* Low-order bits in kvm->arch.slot_phys[][] */
#define KVMPPC_PAGE_ORDER_MASK 0x1f
#define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */
#define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */
#define KVMPPC_GOT_PAGE 0x80
struct kvm_arch_memory_slot {
};
struct kvm_arch {
#ifdef CONFIG_KVM_BOOK3S_64_HV
unsigned long hpt_virt;
unsigned long ram_npages;
unsigned long ram_psize;
unsigned long ram_porder;
struct kvmppc_pginfo *ram_pginfo;
struct revmap_entry *revmap;
unsigned int lpid;
unsigned int host_lpid;
unsigned long host_lpcr;
unsigned long sdr1;
unsigned long host_sdr1;
int tlbie_lock;
int n_rma_pages;
unsigned long lpcr;
unsigned long rmor;
struct kvmppc_rma_info *rma;
struct kvmppc_linear_info *rma;
unsigned long vrma_slb_v;
int rma_setup_done;
int using_mmu_notifiers;
struct list_head spapr_tce_tables;
spinlock_t slot_phys_lock;
unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
int slot_npages[KVM_MEM_SLOTS_NUM];
unsigned short last_vcpu[NR_CPUS];
struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
struct kvmppc_linear_info *hpt_li;
#endif /* CONFIG_KVM_BOOK3S_64_HV */
};
@ -318,10 +371,6 @@ struct kvm_vcpu_arch {
u32 vrsave; /* also USPRG0 */
u32 mmucr;
ulong shadow_msr;
ulong sprg4;
ulong sprg5;
ulong sprg6;
ulong sprg7;
ulong csrr0;
ulong csrr1;
ulong dsrr0;
@ -329,16 +378,14 @@ struct kvm_vcpu_arch {
ulong mcsrr0;
ulong mcsrr1;
ulong mcsr;
ulong esr;
u32 dec;
u32 decar;
u32 tbl;
u32 tbu;
u32 tcr;
u32 tsr;
ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
u32 ivor[64];
ulong ivpr;
u32 pir;
u32 pvr;
u32 shadow_pid;
@ -427,9 +474,14 @@ struct kvm_vcpu_arch {
#ifdef CONFIG_KVM_BOOK3S_64_HV
struct kvm_vcpu_arch_shared shregs;
unsigned long pgfault_addr;
long pgfault_index;
unsigned long pgfault_hpte[2];
struct list_head run_list;
struct task_struct *run_task;
struct kvm_run *kvm_run;
pgd_t *pgdir;
#endif
};
@ -438,4 +490,12 @@ struct kvm_vcpu_arch {
#define KVMPPC_VCPU_BUSY_IN_HOST 1
#define KVMPPC_VCPU_RUNNABLE 2
/* Values for vcpu->arch.io_gpr */
#define KVM_MMIO_REG_MASK 0x001f
#define KVM_MMIO_REG_EXT_MASK 0xffe0
#define KVM_MMIO_REG_GPR 0x0000
#define KVM_MMIO_REG_FPR 0x0020
#define KVM_MMIO_REG_QPR 0x0040
#define KVM_MMIO_REG_FQPR 0x0060
#endif /* __POWERPC_KVM_HOST_H__ */

41
arch/powerpc/include/asm/kvm_para.h
View File

@ -22,6 +22,16 @@
#include <linux/types.h>
/*
* Additions to this struct must only occur at the end, and should be
* accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
* (albeit not necessarily relevant to the current target hardware platform).
*
* Struct fields are always 32 or 64 bit aligned, depending on them being 32
* or 64 bit wide respectively.
*
* See Documentation/virtual/kvm/ppc-pv.txt
*/
struct kvm_vcpu_arch_shared {
__u64 scratch1;
__u64 scratch2;
@ -33,11 +43,35 @@ struct kvm_vcpu_arch_shared {
__u64 sprg3;
__u64 srr0;
__u64 srr1;
__u64 dar;
__u64 dar; /* dear on BookE */
__u64 msr;
__u32 dsisr;
__u32 int_pending; /* Tells the guest if we have an interrupt */
__u32 sr[16];
__u32 mas0;
__u32 mas1;
__u64 mas7_3;
__u64 mas2;
__u32 mas4;
__u32 mas6;
__u32 esr;
__u32 pir;
/*
* SPRG4-7 are user-readable, so we can only keep these consistent
* between the shared area and the real registers when there's an
* intervening exit to KVM. This also applies to SPRG3 on some
* chips.
*
* This suffices for access by guest userspace, since in PR-mode
* KVM, an exit must occur when changing the guest's MSR[PR].
* If the guest kernel writes to SPRG3-7 via the shared area, it
* must also use the shared area for reading while in kernel space.
*/
__u64 sprg4;
__u64 sprg5;
__u64 sprg6;
__u64 sprg7;
};
#define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */
@ -47,7 +81,10 @@ struct kvm_vcpu_arch_shared {
#define KVM_FEATURE_MAGIC_PAGE 1
#define KVM_MAGIC_FEAT_SR (1 << 0)
#define KVM_MAGIC_FEAT_SR (1 << 0)
/* MASn, ESR, PIR, and high SPRGs */
#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1)
#ifdef __KERNEL__

25
arch/powerpc/include/asm/kvm_ppc.h
View File

@ -66,6 +66,7 @@ extern int kvmppc_emulate_instruction(struct kvm_run *run,
extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu);
extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb);
extern void kvmppc_decrementer_func(unsigned long data);
extern int kvmppc_sanity_check(struct kvm_vcpu *vcpu);
/* Core-specific hooks */
@ -94,7 +95,7 @@ extern int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
extern void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
extern void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu);
extern void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu);
extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags);
extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
@ -120,15 +121,17 @@ extern long kvmppc_alloc_hpt(struct kvm *kvm);
extern void kvmppc_free_hpt(struct kvm *kvm);
extern long kvmppc_prepare_vrma(struct kvm *kvm,
struct kvm_userspace_memory_region *mem);
extern void kvmppc_map_vrma(struct kvm *kvm,
struct kvm_userspace_memory_region *mem);
extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu,
struct kvm_memory_slot *memslot, unsigned long porder);
extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);
extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
struct kvm_create_spapr_tce *args);
extern long kvm_vm_ioctl_allocate_rma(struct kvm *kvm,
struct kvm_allocate_rma *rma);
extern struct kvmppc_rma_info *kvm_alloc_rma(void);
extern void kvm_release_rma(struct kvmppc_rma_info *ri);
extern struct kvmppc_linear_info *kvm_alloc_rma(void);
extern void kvm_release_rma(struct kvmppc_linear_info *ri);
extern struct kvmppc_linear_info *kvm_alloc_hpt(void);
extern void kvm_release_hpt(struct kvmppc_linear_info *li);
extern int kvmppc_core_init_vm(struct kvm *kvm);
extern void kvmppc_core_destroy_vm(struct kvm *kvm);
extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
@ -175,6 +178,9 @@ int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid);
#ifdef CONFIG_KVM_BOOK3S_64_HV
@ -183,14 +189,19 @@ static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
paca[cpu].kvm_hstate.xics_phys = addr;
}
extern void kvm_rma_init(void);
extern void kvm_linear_init(void);
#else
static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
{}
static inline void kvm_rma_init(void)
static inline void kvm_linear_init(void)
{}
#endif
int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
struct kvm_config_tlb *cfg);
int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
struct kvm_dirty_tlb *cfg);
#endif /* __POWERPC_KVM_PPC_H__ */

6
arch/powerpc/include/asm/mmu-book3e.h
View File

@ -41,9 +41,10 @@
/* MAS registers bit definitions */
#define MAS0_TLBSEL(x) (((x) << 28) & 0x30000000)
#define MAS0_ESEL(x) (((x) << 16) & 0x0FFF0000)
#define MAS0_NV(x) ((x) & 0x00000FFF)
#define MAS0_ESEL_MASK 0x0FFF0000
#define MAS0_ESEL_SHIFT 16
#define MAS0_ESEL(x) (((x) << MAS0_ESEL_SHIFT) & MAS0_ESEL_MASK)
#define MAS0_NV(x) ((x) & 0x00000FFF)
#define MAS0_HES 0x00004000
#define MAS0_WQ_ALLWAYS 0x00000000
#define MAS0_WQ_COND 0x00001000
@ -167,6 +168,7 @@
#define TLBnCFG_MAXSIZE 0x000f0000 /* Maximum Page Size (v1.0) */
#define TLBnCFG_MAXSIZE_SHIFT 16
#define TLBnCFG_ASSOC 0xff000000 /* Associativity */
#define TLBnCFG_ASSOC_SHIFT 24
/* TLBnPS encoding */
#define TLBnPS_4K 0x00000004

2
arch/powerpc/include/asm/mmu-hash64.h
View File

@ -108,11 +108,11 @@ extern char initial_stab[];
#define HPTE_V_VRMA_MASK ASM_CONST(0x4001ffffff000000)
/* Values for PP (assumes Ks=0, Kp=1) */
/* pp0 will always be 0 for linux */
#define PP_RWXX 0 /* Supervisor read/write, User none */
#define PP_RWRX 1 /* Supervisor read/write, User read */
#define PP_RWRW 2 /* Supervisor read/write, User read/write */
#define PP_RXRX 3 /* Supervisor read, User read */
#define PP_RXXX (HPTE_R_PP0 | 2) /* Supervisor read, user none */
#ifndef __ASSEMBLY__

4
arch/powerpc/include/asm/ppc-opcode.h
View File

@ -45,6 +45,7 @@
#define PPC_INST_MFSPR_DSCR_MASK 0xfc1fffff
#define PPC_INST_MTSPR_DSCR 0x7c1103a6
#define PPC_INST_MTSPR_DSCR_MASK 0xfc1fffff
#define PPC_INST_SLBFEE 0x7c0007a7
#define PPC_INST_STRING 0x7c00042a
#define PPC_INST_STRING_MASK 0xfc0007fe
@ -183,7 +184,8 @@
__PPC_RS(t) | __PPC_RA(a) | __PPC_RB(b))
#define PPC_ERATSX_DOT(t, a, w) stringify_in_c(.long PPC_INST_ERATSX_DOT | \
__PPC_RS(t) | __PPC_RA(a) | __PPC_RB(b))
#define PPC_SLBFEE_DOT(t, b) stringify_in_c(.long PPC_INST_SLBFEE | \
__PPC_RT(t) | __PPC_RB(b))
/*
* Define what the VSX XX1 form instructions will look like, then add

5
arch/powerpc/include/asm/reg.h
View File

@ -216,6 +216,7 @@
#define DSISR_ISSTORE 0x02000000 /* access was a store */
#define DSISR_DABRMATCH 0x00400000 /* hit data breakpoint */
#define DSISR_NOSEGMENT 0x00200000 /* STAB/SLB miss */
#define DSISR_KEYFAULT 0x00200000 /* Key fault */
#define SPRN_TBRL 0x10C /* Time Base Read Lower Register (user, R/O) */
#define SPRN_TBRU 0x10D /* Time Base Read Upper Register (user, R/O) */
#define SPRN_TBWL 0x11C /* Time Base Lower Register (super, R/W) */
@ -237,6 +238,7 @@
#define LPCR_ISL (1ul << (63-2))
#define LPCR_VC_SH (63-2)
#define LPCR_DPFD_SH (63-11)
#define LPCR_VRMASD (0x1ful << (63-16))
#define LPCR_VRMA_L (1ul << (63-12))
#define LPCR_VRMA_LP0 (1ul << (63-15))
#define LPCR_VRMA_LP1 (1ul << (63-16))
@ -493,6 +495,9 @@
#define SPRN_SPRG7 0x117 /* Special Purpose Register General 7 */
#define SPRN_SRR0 0x01A /* Save/Restore Register 0 */
#define SPRN_SRR1 0x01B /* Save/Restore Register 1 */
#define SRR1_ISI_NOPT 0x40000000 /* ISI: Not found in hash */
#define SRR1_ISI_N_OR_G 0x10000000 /* ISI: Access is no-exec or G */
#define SRR1_ISI_PROT 0x08000000 /* ISI: Other protection fault */
#define SRR1_WAKEMASK 0x00380000 /* reason for wakeup */
#define SRR1_WAKESYSERR 0x00300000 /* System error */
#define SRR1_WAKEEE 0x00200000 /* External interrupt */

16
arch/powerpc/kernel/asm-offsets.c
View File

@ -412,16 +412,23 @@ int main(void)
DEFINE(VCPU_SPRG2, offsetof(struct kvm_vcpu, arch.shregs.sprg2));
DEFINE(VCPU_SPRG3, offsetof(struct kvm_vcpu, arch.shregs.sprg3));
#endif
DEFINE(VCPU_SPRG4, offsetof(struct kvm_vcpu, arch.sprg4));
DEFINE(VCPU_SPRG5, offsetof(struct kvm_vcpu, arch.sprg5));
DEFINE(VCPU_SPRG6, offsetof(struct kvm_vcpu, arch.sprg6));
DEFINE(VCPU_SPRG7, offsetof(struct kvm_vcpu, arch.sprg7));
DEFINE(VCPU_SHARED_SPRG4, offsetof(struct kvm_vcpu_arch_shared, sprg4));
DEFINE(VCPU_SHARED_SPRG5, offsetof(struct kvm_vcpu_arch_shared, sprg5));
DEFINE(VCPU_SHARED_SPRG6, offsetof(struct kvm_vcpu_arch_shared, sprg6));
DEFINE(VCPU_SHARED_SPRG7, offsetof(struct kvm_vcpu_arch_shared, sprg7));
DEFINE(VCPU_SHADOW_PID, offsetof(struct kvm_vcpu, arch.shadow_pid));
DEFINE(VCPU_SHADOW_PID1, offsetof(struct kvm_vcpu, arch.shadow_pid1));
DEFINE(VCPU_SHARED, offsetof(struct kvm_vcpu, arch.shared));
DEFINE(VCPU_SHARED_MSR, offsetof(struct kvm_vcpu_arch_shared, msr));
DEFINE(VCPU_SHADOW_MSR, offsetof(struct kvm_vcpu, arch.shadow_msr));
DEFINE(VCPU_SHARED_MAS0, offsetof(struct kvm_vcpu_arch_shared, mas0));
DEFINE(VCPU_SHARED_MAS1, offsetof(struct kvm_vcpu_arch_shared, mas1));
DEFINE(VCPU_SHARED_MAS2, offsetof(struct kvm_vcpu_arch_shared, mas2));
DEFINE(VCPU_SHARED_MAS7_3, offsetof(struct kvm_vcpu_arch_shared, mas7_3));
DEFINE(VCPU_SHARED_MAS4, offsetof(struct kvm_vcpu_arch_shared, mas4));
DEFINE(VCPU_SHARED_MAS6, offsetof(struct kvm_vcpu_arch_shared, mas6));
/* book3s */
#ifdef CONFIG_KVM_BOOK3S_64_HV
DEFINE(KVM_LPID, offsetof(struct kvm, arch.lpid));
@ -434,6 +441,7 @@ int main(void)
DEFINE(KVM_LAST_VCPU, offsetof(struct kvm, arch.last_vcpu));
DEFINE(KVM_LPCR, offsetof(struct kvm, arch.lpcr));
DEFINE(KVM_RMOR, offsetof(struct kvm, arch.rmor));
DEFINE(KVM_VRMA_SLB_V, offsetof(struct kvm, arch.vrma_slb_v));
DEFINE(VCPU_DSISR, offsetof(struct kvm_vcpu, arch.shregs.dsisr));
DEFINE(VCPU_DAR, offsetof(struct kvm_vcpu, arch.shregs.dar));
#endif

8
arch/powerpc/kernel/exceptions-64s.S
View File

@ -101,14 +101,14 @@ data_access_not_stab:
END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB)
#endif
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD,
KVMTEST_PR, 0x300)
KVMTEST, 0x300)
. = 0x380
.globl data_access_slb_pSeries
data_access_slb_pSeries:
HMT_MEDIUM
SET_SCRATCH0(r13)
EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x380)
EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380)
std r3,PACA_EXSLB+EX_R3(r13)
mfspr r3,SPRN_DAR
#ifdef __DISABLED__
@ -330,8 +330,8 @@ do_stab_bolted_pSeries:
EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)
#endif /* CONFIG_POWER4_ONLY */
KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_STD, 0x300)
KVM_HANDLER_PR_SKIP(PACA_EXSLB, EXC_STD, 0x380)
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300)
KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x400)
KVM_HANDLER_PR(PACA_EXSLB, EXC_STD, 0x480)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x900)

305
arch/powerpc/kernel/kvm.c
View File

@ -1,5 +1,6 @@
/*
* Copyright (C) 2010 SUSE Linux Products GmbH. All rights reserved.
* Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* Authors:
* Alexander Graf <agraf@suse.de>
@ -29,6 +30,7 @@
#include <asm/sections.h>
#include <asm/cacheflush.h>
#include <asm/disassemble.h>
#include <asm/ppc-opcode.h>
#define KVM_MAGIC_PAGE (-4096L)
#define magic_var(x) KVM_MAGIC_PAGE + offsetof(struct kvm_vcpu_arch_shared, x)
@ -41,34 +43,30 @@
#define KVM_INST_B 0x48000000
#define KVM_INST_B_MASK 0x03ffffff
#define KVM_INST_B_MAX 0x01ffffff
#define KVM_INST_LI 0x38000000
#define KVM_MASK_RT 0x03e00000
#define KVM_RT_30 0x03c00000
#define KVM_MASK_RB 0x0000f800
#define KVM_INST_MFMSR 0x7c0000a6
#define KVM_INST_MFSPR_SPRG0 0x7c1042a6
#define KVM_INST_MFSPR_SPRG1 0x7c1142a6
#define KVM_INST_MFSPR_SPRG2 0x7c1242a6
#define KVM_INST_MFSPR_SPRG3 0x7c1342a6
#define KVM_INST_MFSPR_SRR0 0x7c1a02a6
#define KVM_INST_MFSPR_SRR1 0x7c1b02a6
#define KVM_INST_MFSPR_DAR 0x7c1302a6
#define KVM_INST_MFSPR_DSISR 0x7c1202a6
#define KVM_INST_MTSPR_SPRG0 0x7c1043a6
#define KVM_INST_MTSPR_SPRG1 0x7c1143a6
#define KVM_INST_MTSPR_SPRG2 0x7c1243a6
#define KVM_INST_MTSPR_SPRG3 0x7c1343a6
#define KVM_INST_MTSPR_SRR0 0x7c1a03a6
#define KVM_INST_MTSPR_SRR1 0x7c1b03a6
#define KVM_INST_MTSPR_DAR 0x7c1303a6
#define KVM_INST_MTSPR_DSISR 0x7c1203a6
#define SPR_FROM 0
#define SPR_TO 0x100
#define KVM_INST_SPR(sprn, moveto) (0x7c0002a6 | \
(((sprn) & 0x1f) << 16) | \
(((sprn) & 0x3e0) << 6) | \
(moveto))
#define KVM_INST_MFSPR(sprn) KVM_INST_SPR(sprn, SPR_FROM)
#define KVM_INST_MTSPR(sprn) KVM_INST_SPR(sprn, SPR_TO)
#define KVM_INST_TLBSYNC 0x7c00046c
#define KVM_INST_MTMSRD_L0 0x7c000164
#define KVM_INST_MTMSRD_L1 0x7c010164
#define KVM_INST_MTMSR 0x7c000124
#define KVM_INST_WRTEE 0x7c000106
#define KVM_INST_WRTEEI_0 0x7c000146
#define KVM_INST_WRTEEI_1 0x7c008146
@ -270,26 +268,27 @@ static void kvm_patch_ins_mtmsr(u32 *inst, u32 rt)
#ifdef CONFIG_BOOKE
extern u32 kvm_emulate_wrteei_branch_offs;
extern u32 kvm_emulate_wrteei_ee_offs;
extern u32 kvm_emulate_wrteei_len;
extern u32 kvm_emulate_wrteei[];
extern u32 kvm_emulate_wrtee_branch_offs;
extern u32 kvm_emulate_wrtee_reg_offs;
extern u32 kvm_emulate_wrtee_orig_ins_offs;
extern u32 kvm_emulate_wrtee_len;
extern u32 kvm_emulate_wrtee[];
static void kvm_patch_ins_wrteei(u32 *inst)
static void kvm_patch_ins_wrtee(u32 *inst, u32 rt, int imm_one)
{
u32 *p;
int distance_start;
int distance_end;
ulong next_inst;
p = kvm_alloc(kvm_emulate_wrteei_len * 4);
p = kvm_alloc(kvm_emulate_wrtee_len * 4);
if (!p)
return;
/* Find out where we are and put everything there */
distance_start = (ulong)p - (ulong)inst;
next_inst = ((ulong)inst + 4);
distance_end = next_inst - (ulong)&p[kvm_emulate_wrteei_branch_offs];
distance_end = next_inst - (ulong)&p[kvm_emulate_wrtee_branch_offs];
/* Make sure we only write valid b instructions */
if (distance_start > KVM_INST_B_MAX) {
@ -298,10 +297,65 @@ static void kvm_patch_ins_wrteei(u32 *inst)
}
/* Modify the chunk to fit the invocation */
memcpy(p, kvm_emulate_wrteei, kvm_emulate_wrteei_len * 4);
p[kvm_emulate_wrteei_branch_offs] |= distance_end & KVM_INST_B_MASK;
p[kvm_emulate_wrteei_ee_offs] |= (*inst & MSR_EE);
flush_icache_range((ulong)p, (ulong)p + kvm_emulate_wrteei_len * 4);
memcpy(p, kvm_emulate_wrtee, kvm_emulate_wrtee_len * 4);
p[kvm_emulate_wrtee_branch_offs] |= distance_end & KVM_INST_B_MASK;
if (imm_one) {
p[kvm_emulate_wrtee_reg_offs] =
KVM_INST_LI | __PPC_RT(30) | MSR_EE;
} else {
/* Make clobbered registers work too */
switch (get_rt(rt)) {
case 30:
kvm_patch_ins_ll(&p[kvm_emulate_wrtee_reg_offs],
magic_var(scratch2), KVM_RT_30);
break;
case 31:
kvm_patch_ins_ll(&p[kvm_emulate_wrtee_reg_offs],
magic_var(scratch1), KVM_RT_30);
break;
default:
p[kvm_emulate_wrtee_reg_offs] |= rt;
break;
}
}
p[kvm_emulate_wrtee_orig_ins_offs] = *inst;
flush_icache_range((ulong)p, (ulong)p + kvm_emulate_wrtee_len * 4);
/* Patch the invocation */
kvm_patch_ins_b(inst, distance_start);
}
extern u32 kvm_emulate_wrteei_0_branch_offs;
extern u32 kvm_emulate_wrteei_0_len;
extern u32 kvm_emulate_wrteei_0[];
static void kvm_patch_ins_wrteei_0(u32 *inst)
{
u32 *p;
int distance_start;
int distance_end;
ulong next_inst;
p = kvm_alloc(kvm_emulate_wrteei_0_len * 4);
if (!p)
return;
/* Find out where we are and put everything there */
distance_start = (ulong)p - (ulong)inst;
next_inst = ((ulong)inst + 4);
distance_end = next_inst - (ulong)&p[kvm_emulate_wrteei_0_branch_offs];
/* Make sure we only write valid b instructions */
if (distance_start > KVM_INST_B_MAX) {
kvm_patching_worked = false;
return;
}
memcpy(p, kvm_emulate_wrteei_0, kvm_emulate_wrteei_0_len * 4);
p[kvm_emulate_wrteei_0_branch_offs] |= distance_end & KVM_INST_B_MASK;
flush_icache_range((ulong)p, (ulong)p + kvm_emulate_wrteei_0_len * 4);
/* Patch the invocation */
kvm_patch_ins_b(inst, distance_start);
@ -380,56 +434,191 @@ static void kvm_check_ins(u32 *inst, u32 features)
case KVM_INST_MFMSR:
kvm_patch_ins_ld(inst, magic_var(msr), inst_rt);
break;
case KVM_INST_MFSPR_SPRG0:
case KVM_INST_MFSPR(SPRN_SPRG0):
kvm_patch_ins_ld(inst, magic_var(sprg0), inst_rt);
break;
case KVM_INST_MFSPR_SPRG1:
case KVM_INST_MFSPR(SPRN_SPRG1):
kvm_patch_ins_ld(inst, magic_var(sprg1), inst_rt);
break;
case KVM_INST_MFSPR_SPRG2:
case KVM_INST_MFSPR(SPRN_SPRG2):
kvm_patch_ins_ld(inst, magic_var(sprg2), inst_rt);
break;
case KVM_INST_MFSPR_SPRG3:
case KVM_INST_MFSPR(SPRN_SPRG3):
kvm_patch_ins_ld(inst, magic_var(sprg3), inst_rt);
break;
case KVM_INST_MFSPR_SRR0:
case KVM_INST_MFSPR(SPRN_SRR0):
kvm_patch_ins_ld(inst, magic_var(srr0), inst_rt);
break;
case KVM_INST_MFSPR_SRR1:
case KVM_INST_MFSPR(SPRN_SRR1):
kvm_patch_ins_ld(inst, magic_var(srr1), inst_rt);
break;
case KVM_INST_MFSPR_DAR:
#ifdef CONFIG_BOOKE
case KVM_INST_MFSPR(SPRN_DEAR):
#else
case KVM_INST_MFSPR(SPRN_DAR):
#endif
kvm_patch_ins_ld(inst, magic_var(dar), inst_rt);
break;
case KVM_INST_MFSPR_DSISR:
case KVM_INST_MFSPR(SPRN_DSISR):
kvm_patch_ins_lwz(inst, magic_var(dsisr), inst_rt);
break;
#ifdef CONFIG_PPC_BOOK3E_MMU
case KVM_INST_MFSPR(SPRN_MAS0):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_lwz(inst, magic_var(mas0), inst_rt);
break;
case KVM_INST_MFSPR(SPRN_MAS1):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_lwz(inst, magic_var(mas1), inst_rt);
break;
case KVM_INST_MFSPR(SPRN_MAS2):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_ld(inst, magic_var(mas2), inst_rt);
break;
case KVM_INST_MFSPR(SPRN_MAS3):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_lwz(inst, magic_var(mas7_3) + 4, inst_rt);
break;
case KVM_INST_MFSPR(SPRN_MAS4):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_lwz(inst, magic_var(mas4), inst_rt);
break;
case KVM_INST_MFSPR(SPRN_MAS6):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_lwz(inst, magic_var(mas6), inst_rt);
break;
case KVM_INST_MFSPR(SPRN_MAS7):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_lwz(inst, magic_var(mas7_3), inst_rt);
break;
#endif /* CONFIG_PPC_BOOK3E_MMU */
case KVM_INST_MFSPR(SPRN_SPRG4):
#ifdef CONFIG_BOOKE
case KVM_INST_MFSPR(SPRN_SPRG4R):
#endif
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_ld(inst, magic_var(sprg4), inst_rt);
break;
case KVM_INST_MFSPR(SPRN_SPRG5):
#ifdef CONFIG_BOOKE
case KVM_INST_MFSPR(SPRN_SPRG5R):
#endif
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_ld(inst, magic_var(sprg5), inst_rt);
break;
case KVM_INST_MFSPR(SPRN_SPRG6):
#ifdef CONFIG_BOOKE
case KVM_INST_MFSPR(SPRN_SPRG6R):
#endif
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_ld(inst, magic_var(sprg6), inst_rt);
break;
case KVM_INST_MFSPR(SPRN_SPRG7):
#ifdef CONFIG_BOOKE
case KVM_INST_MFSPR(SPRN_SPRG7R):
#endif
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_ld(inst, magic_var(sprg7), inst_rt);
break;
#ifdef CONFIG_BOOKE
case KVM_INST_MFSPR(SPRN_ESR):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_lwz(inst, magic_var(esr), inst_rt);
break;
#endif
case KVM_INST_MFSPR(SPRN_PIR):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_lwz(inst, magic_var(pir), inst_rt);
break;
/* Stores */
case KVM_INST_MTSPR_SPRG0:
case KVM_INST_MTSPR(SPRN_SPRG0):
kvm_patch_ins_std(inst, magic_var(sprg0), inst_rt);
break;
case KVM_INST_MTSPR_SPRG1:
case KVM_INST_MTSPR(SPRN_SPRG1):
kvm_patch_ins_std(inst, magic_var(sprg1), inst_rt);
break;
case KVM_INST_MTSPR_SPRG2:
case KVM_INST_MTSPR(SPRN_SPRG2):
kvm_patch_ins_std(inst, magic_var(sprg2), inst_rt);
break;
case KVM_INST_MTSPR_SPRG3:
case KVM_INST_MTSPR(SPRN_SPRG3):
kvm_patch_ins_std(inst, magic_var(sprg3), inst_rt);
break;
case KVM_INST_MTSPR_SRR0:
case KVM_INST_MTSPR(SPRN_SRR0):
kvm_patch_ins_std(inst, magic_var(srr0), inst_rt);
break;
case KVM_INST_MTSPR_SRR1:
case KVM_INST_MTSPR(SPRN_SRR1):
kvm_patch_ins_std(inst, magic_var(srr1), inst_rt);
break;
case KVM_INST_MTSPR_DAR:
#ifdef CONFIG_BOOKE
case KVM_INST_MTSPR(SPRN_DEAR):
#else
case KVM_INST_MTSPR(SPRN_DAR):
#endif
kvm_patch_ins_std(inst, magic_var(dar), inst_rt);
break;
case KVM_INST_MTSPR_DSISR:
case KVM_INST_MTSPR(SPRN_DSISR):
kvm_patch_ins_stw(inst, magic_var(dsisr), inst_rt);
break;
#ifdef CONFIG_PPC_BOOK3E_MMU
case KVM_INST_MTSPR(SPRN_MAS0):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_stw(inst, magic_var(mas0), inst_rt);
break;
case KVM_INST_MTSPR(SPRN_MAS1):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_stw(inst, magic_var(mas1), inst_rt);
break;
case KVM_INST_MTSPR(SPRN_MAS2):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_std(inst, magic_var(mas2), inst_rt);
break;
case KVM_INST_MTSPR(SPRN_MAS3):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_stw(inst, magic_var(mas7_3) + 4, inst_rt);
break;
case KVM_INST_MTSPR(SPRN_MAS4):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_stw(inst, magic_var(mas4), inst_rt);
break;
case KVM_INST_MTSPR(SPRN_MAS6):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_stw(inst, magic_var(mas6), inst_rt);
break;
case KVM_INST_MTSPR(SPRN_MAS7):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_stw(inst, magic_var(mas7_3), inst_rt);
break;
#endif /* CONFIG_PPC_BOOK3E_MMU */
case KVM_INST_MTSPR(SPRN_SPRG4):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_std(inst, magic_var(sprg4), inst_rt);
break;
case KVM_INST_MTSPR(SPRN_SPRG5):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_std(inst, magic_var(sprg5), inst_rt);
break;
case KVM_INST_MTSPR(SPRN_SPRG6):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_std(inst, magic_var(sprg6), inst_rt);
break;
case KVM_INST_MTSPR(SPRN_SPRG7):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_std(inst, magic_var(sprg7), inst_rt);
break;
#ifdef CONFIG_BOOKE
case KVM_INST_MTSPR(SPRN_ESR):
if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7)
kvm_patch_ins_stw(inst, magic_var(esr), inst_rt);
break;
#endif
/* Nops */
case KVM_INST_TLBSYNC:
@ -444,6 +633,11 @@ static void kvm_check_ins(u32 *inst, u32 features)
case KVM_INST_MTMSRD_L0:
kvm_patch_ins_mtmsr(inst, inst_rt);
break;
#ifdef CONFIG_BOOKE
case KVM_INST_WRTEE:
kvm_patch_ins_wrtee(inst, inst_rt, 0);
break;
#endif
}
switch (inst_no_rt & ~KVM_MASK_RB) {
@ -461,13 +655,19 @@ static void kvm_check_ins(u32 *inst, u32 features)
switch (_inst) {
#ifdef CONFIG_BOOKE
case KVM_INST_WRTEEI_0:
kvm_patch_ins_wrteei_0(inst);
break;
case KVM_INST_WRTEEI_1:
kvm_patch_ins_wrteei(inst);
kvm_patch_ins_wrtee(inst, 0, 1);
break;
#endif
}
}
extern u32 kvm_template_start[];
extern u32 kvm_template_end[];
static void kvm_use_magic_page(void)
{
u32 *p;
@ -488,8 +688,23 @@ static void kvm_use_magic_page(void)
start = (void*)_stext;
end = (void*)_etext;
for (p = start; p < end; p++)
/*
* Being interrupted in the middle of patching would
* be bad for SPRG4-7, which KVM can't keep in sync
* with emulated accesses because reads don't trap.
*/
local_irq_disable();
for (p = start; p < end; p++) {
/* Avoid patching the template code */
if (p >= kvm_template_start && p < kvm_template_end) {
p = kvm_template_end - 1;
continue;
}
kvm_check_ins(p, features);
}
local_irq_enable();
printk(KERN_INFO "KVM: Live patching for a fast VM %s\n",
kvm_patching_worked ? "worked" : "failed");

116
arch/powerpc/kernel/kvm_emul.S
View File

@ -13,6 +13,7 @@
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright SUSE Linux Products GmbH 2010
* Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* Authors: Alexander Graf <agraf@suse.de>
*/
@ -65,6 +66,9 @@ kvm_hypercall_start:
shared->critical == r1 and r2 is always != r1 */ \
STL64(r2, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0);
.global kvm_template_start
kvm_template_start:
.global kvm_emulate_mtmsrd
kvm_emulate_mtmsrd:
@ -167,6 +171,9 @@ maybe_stay_in_guest:
kvm_emulate_mtmsr_reg2:
ori r30, r0, 0
/* Put MSR into magic page because we don't call mtmsr */
STL64(r30, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
/* Check if we have to fetch an interrupt */
lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
cmpwi r31, 0
@ -174,15 +181,10 @@ kvm_emulate_mtmsr_reg2:
/* Check if we may trigger an interrupt */
andi. r31, r30, MSR_EE
beq no_mtmsr
b do_mtmsr
bne do_mtmsr
no_mtmsr:
/* Put MSR into magic page because we don't call mtmsr */
STL64(r30, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
SCRATCH_RESTORE
/* Go back to caller */
@ -210,24 +212,80 @@ kvm_emulate_mtmsr_orig_ins_offs:
kvm_emulate_mtmsr_len:
.long (kvm_emulate_mtmsr_end - kvm_emulate_mtmsr) / 4
.global kvm_emulate_wrteei
kvm_emulate_wrteei:
/* also used for wrteei 1 */
.global kvm_emulate_wrtee
kvm_emulate_wrtee:
SCRATCH_SAVE
/* Fetch old MSR in r31 */
LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
/* Remove MSR_EE from old MSR */
li r30, 0
ori r30, r30, MSR_EE
andc r31, r31, r30
/* Insert new MSR[EE] */
kvm_emulate_wrtee_reg:
ori r30, r0, 0
rlwimi r31, r30, 0, MSR_EE
/* OR new MSR_EE onto the old MSR */
kvm_emulate_wrteei_ee:
ori r31, r31, 0
/*
* If MSR[EE] is now set, check for a pending interrupt.
* We could skip this if MSR[EE] was already on, but that
* should be rare, so don't bother.
*/
andi. r30, r30, MSR_EE
/* Put MSR into magic page because we don't call wrtee */
STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
beq no_wrtee
/* Check if we have to fetch an interrupt */
lwz r30, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
cmpwi r30, 0
bne do_wrtee
no_wrtee:
SCRATCH_RESTORE
/* Go back to caller */
kvm_emulate_wrtee_branch:
b .
do_wrtee:
SCRATCH_RESTORE
/* Just fire off the wrtee if it's critical */
kvm_emulate_wrtee_orig_ins:
wrtee r0
b kvm_emulate_wrtee_branch
kvm_emulate_wrtee_end:
.global kvm_emulate_wrtee_branch_offs
kvm_emulate_wrtee_branch_offs:
.long (kvm_emulate_wrtee_branch - kvm_emulate_wrtee) / 4
.global kvm_emulate_wrtee_reg_offs
kvm_emulate_wrtee_reg_offs:
.long (kvm_emulate_wrtee_reg - kvm_emulate_wrtee) / 4
.global kvm_emulate_wrtee_orig_ins_offs
kvm_emulate_wrtee_orig_ins_offs:
.long (kvm_emulate_wrtee_orig_ins - kvm_emulate_wrtee) / 4
.global kvm_emulate_wrtee_len
kvm_emulate_wrtee_len:
.long (kvm_emulate_wrtee_end - kvm_emulate_wrtee) / 4
.global kvm_emulate_wrteei_0
kvm_emulate_wrteei_0:
SCRATCH_SAVE
/* Fetch old MSR in r31 */
LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
/* Remove MSR_EE from old MSR */
rlwinm r31, r31, 0, ~MSR_EE
/* Write new MSR value back */
STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
@ -235,22 +293,17 @@ kvm_emulate_wrteei_ee:
SCRATCH_RESTORE
/* Go back to caller */
kvm_emulate_wrteei_branch:
kvm_emulate_wrteei_0_branch:
b .
kvm_emulate_wrteei_end:
kvm_emulate_wrteei_0_end:
.global kvm_emulate_wrteei_branch_offs
kvm_emulate_wrteei_branch_offs:
.long (kvm_emulate_wrteei_branch - kvm_emulate_wrteei) / 4
.global kvm_emulate_wrteei_ee_offs
kvm_emulate_wrteei_ee_offs:
.long (kvm_emulate_wrteei_ee - kvm_emulate_wrteei) / 4
.global kvm_emulate_wrteei_len
kvm_emulate_wrteei_len:
.long (kvm_emulate_wrteei_end - kvm_emulate_wrteei) / 4
.global kvm_emulate_wrteei_0_branch_offs
kvm_emulate_wrteei_0_branch_offs:
.long (kvm_emulate_wrteei_0_branch - kvm_emulate_wrteei_0) / 4
.global kvm_emulate_wrteei_0_len
kvm_emulate_wrteei_0_len:
.long (kvm_emulate_wrteei_0_end - kvm_emulate_wrteei_0) / 4
.global kvm_emulate_mtsrin
kvm_emulate_mtsrin:
@ -300,3 +353,6 @@ kvm_emulate_mtsrin_orig_ins_offs:
.global kvm_emulate_mtsrin_len
kvm_emulate_mtsrin_len:
.long (kvm_emulate_mtsrin_end - kvm_emulate_mtsrin) / 4
.global kvm_template_end
kvm_template_end:

2
arch/powerpc/kernel/setup_64.c
View File

@ -598,7 +598,7 @@ void __init setup_arch(char **cmdline_p)
/* Initialize the MMU context management stuff */
mmu_context_init();
kvm_rma_init();
kvm_linear_init();
ppc64_boot_msg(0x15, "Setup Done");
}

1
arch/powerpc/kvm/Kconfig
View File

@ -69,6 +69,7 @@ config KVM_BOOK3S_64
config KVM_BOOK3S_64_HV
bool "KVM support for POWER7 and PPC970 using hypervisor mode in host"
depends on KVM_BOOK3S_64
select MMU_NOTIFIER
---help---
Support running unmodified book3s_64 guest kernels in
virtual machines on POWER7 and PPC970 processors that have

57
arch/powerpc/kvm/book3s.c
View File

@ -258,7 +258,7 @@ static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
return true;
}
void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
{
unsigned long *pending = &vcpu->arch.pending_exceptions;
unsigned long old_pending = vcpu->arch.pending_exceptions;
@ -423,10 +423,10 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
regs->sprg1 = vcpu->arch.shared->sprg1;
regs->sprg2 = vcpu->arch.shared->sprg2;
regs->sprg3 = vcpu->arch.shared->sprg3;
regs->sprg4 = vcpu->arch.sprg4;
regs->sprg5 = vcpu->arch.sprg5;
regs->sprg6 = vcpu->arch.sprg6;
regs->sprg7 = vcpu->arch.sprg7;
regs->sprg4 = vcpu->arch.shared->sprg4;
regs->sprg5 = vcpu->arch.shared->sprg5;
regs->sprg6 = vcpu->arch.shared->sprg6;
regs->sprg7 = vcpu->arch.shared->sprg7;
for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
@ -450,10 +450,10 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
vcpu->arch.shared->sprg1 = regs->sprg1;
vcpu->arch.shared->sprg2 = regs->sprg2;
vcpu->arch.shared->sprg3 = regs->sprg3;
vcpu->arch.sprg4 = regs->sprg4;
vcpu->arch.sprg5 = regs->sprg5;
vcpu->arch.sprg6 = regs->sprg6;
vcpu->arch.sprg7 = regs->sprg7;
vcpu->arch.shared->sprg4 = regs->sprg4;
vcpu->arch.shared->sprg5 = regs->sprg5;
vcpu->arch.shared->sprg6 = regs->sprg6;
vcpu->arch.shared->sprg7 = regs->sprg7;
for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
@ -477,41 +477,10 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
return 0;
}
/*
* Get (and clear) the dirty memory log for a memory slot.
*/
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
struct kvm_dirty_log *log)
void kvmppc_decrementer_func(unsigned long data)
{
struct kvm_memory_slot *memslot;
struct kvm_vcpu *vcpu;
ulong ga, ga_end;
int is_dirty = 0;
int r;
unsigned long n;
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
mutex_lock(&kvm->slots_lock);
r = kvm_get_dirty_log(kvm, log, &is_dirty);
if (r)
goto out;
/* If nothing is dirty, don't bother messing with page tables. */
if (is_dirty) {
memslot = id_to_memslot(kvm->memslots, log->slot);
ga = memslot->base_gfn << PAGE_SHIFT;
ga_end = ga + (memslot->npages << PAGE_SHIFT);
kvm_for_each_vcpu(n, vcpu, kvm)
kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
n = kvm_dirty_bitmap_bytes(memslot);
memset(memslot->dirty_bitmap, 0, n);
}
r = 0;
out:
mutex_unlock(&kvm->slots_lock);
return r;
kvmppc_core_queue_dec(vcpu);
kvm_vcpu_kick(vcpu);
}

21
arch/powerpc/kvm/book3s_32_mmu_host.c
View File

@ -151,13 +151,15 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
bool primary = false;
bool evict = false;
struct hpte_cache *pte;
int r = 0;
/* Get host physical address for gpa */
hpaddr = kvmppc_gfn_to_pfn(vcpu, orig_pte->raddr >> PAGE_SHIFT);
if (is_error_pfn(hpaddr)) {
printk(KERN_INFO "Couldn't get guest page for gfn %lx!\n",
orig_pte->eaddr);
return -EINVAL;
r = -EINVAL;
goto out;
}
hpaddr <<= PAGE_SHIFT;
@ -249,7 +251,8 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
kvmppc_mmu_hpte_cache_map(vcpu, pte);
return 0;
out:
return r;
}
static struct kvmppc_sid_map *create_sid_map(struct kvm_vcpu *vcpu, u64 gvsid)
@ -297,12 +300,14 @@ int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr)
u64 gvsid;
u32 sr;
struct kvmppc_sid_map *map;
struct kvmppc_book3s_shadow_vcpu *svcpu = to_svcpu(vcpu);
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
int r = 0;
if (vcpu->arch.mmu.esid_to_vsid(vcpu, esid, &gvsid)) {
/* Invalidate an entry */
svcpu->sr[esid] = SR_INVALID;
return -ENOENT;
r = -ENOENT;
goto out;
}
map = find_sid_vsid(vcpu, gvsid);
@ -315,17 +320,21 @@ int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr)
dprintk_sr("MMU: mtsr %d, 0x%x\n", esid, sr);
return 0;
out:
svcpu_put(svcpu);
return r;
}
void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu)
{
int i;
struct kvmppc_book3s_shadow_vcpu *svcpu = to_svcpu(vcpu);
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
dprintk_sr("MMU: flushing all segments (%d)\n", ARRAY_SIZE(svcpu->sr));
for (i = 0; i < ARRAY_SIZE(svcpu->sr); i++)
svcpu->sr[i] = SR_INVALID;
svcpu_put(svcpu);
}
void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)

66
arch/powerpc/kvm/book3s_64_mmu_host.c
View File

@ -88,12 +88,14 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
int vflags = 0;
int attempt = 0;
struct kvmppc_sid_map *map;
int r = 0;
/* Get host physical address for gpa */
hpaddr = kvmppc_gfn_to_pfn(vcpu, orig_pte->raddr >> PAGE_SHIFT);
if (is_error_pfn(hpaddr)) {
printk(KERN_INFO "Couldn't get guest page for gfn %lx!\n", orig_pte->eaddr);
return -EINVAL;
r = -EINVAL;
goto out;
}
hpaddr <<= PAGE_SHIFT;
hpaddr |= orig_pte->raddr & (~0xfffULL & ~PAGE_MASK);
@ -110,7 +112,8 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
printk(KERN_ERR "KVM: Segment map for 0x%llx (0x%lx) failed\n",
vsid, orig_pte->eaddr);
WARN_ON(true);
return -EINVAL;
r = -EINVAL;
goto out;
}
vsid = map->host_vsid;
@ -131,8 +134,10 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
/* In case we tried normal mapping already, let's nuke old entries */
if (attempt > 1)
if (ppc_md.hpte_remove(hpteg) < 0)
return -1;
if (ppc_md.hpte_remove(hpteg) < 0) {
r = -1;
goto out;
}
ret = ppc_md.hpte_insert(hpteg, va, hpaddr, rflags, vflags, MMU_PAGE_4K, MMU_SEGSIZE_256M);
@ -162,7 +167,8 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
kvmppc_mmu_hpte_cache_map(vcpu, pte);
}
return 0;
out:
return r;
}
static struct kvmppc_sid_map *create_sid_map(struct kvm_vcpu *vcpu, u64 gvsid)
@ -207,25 +213,30 @@ static struct kvmppc_sid_map *create_sid_map(struct kvm_vcpu *vcpu, u64 gvsid)
static int kvmppc_mmu_next_segment(struct kvm_vcpu *vcpu, ulong esid)
{
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
int i;
int max_slb_size = 64;
int found_inval = -1;
int r;
if (!to_svcpu(vcpu)->slb_max)
to_svcpu(vcpu)->slb_max = 1;
if (!svcpu->slb_max)
svcpu->slb_max = 1;
/* Are we overwriting? */
for (i = 1; i < to_svcpu(vcpu)->slb_max; i++) {
if (!(to_svcpu(vcpu)->slb[i].esid & SLB_ESID_V))
for (i = 1; i < svcpu->slb_max; i++) {
if (!(svcpu->slb[i].esid & SLB_ESID_V))
found_inval = i;
else if ((to_svcpu(vcpu)->slb[i].esid & ESID_MASK) == esid)
return i;
else if ((svcpu->slb[i].esid & ESID_MASK) == esid) {
r = i;
goto out;
}
}
/* Found a spare entry that was invalidated before */
if (found_inval > 0)
return found_inval;
if (found_inval > 0) {
r = found_inval;
goto out;
}
/* No spare invalid entry, so create one */
@ -233,30 +244,35 @@ static int kvmppc_mmu_next_segment(struct kvm_vcpu *vcpu, ulong esid)
max_slb_size = mmu_slb_size;
/* Overflowing -> purge */
if ((to_svcpu(vcpu)->slb_max) == max_slb_size)
if ((svcpu->slb_max) == max_slb_size)
kvmppc_mmu_flush_segments(vcpu);
r = to_svcpu(vcpu)->slb_max;
to_svcpu(vcpu)->slb_max++;
r = svcpu->slb_max;
svcpu->slb_max++;
out:
svcpu_put(svcpu);
return r;
}
int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr)
{
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
u64 esid = eaddr >> SID_SHIFT;
u64 slb_esid = (eaddr & ESID_MASK) | SLB_ESID_V;
u64 slb_vsid = SLB_VSID_USER;
u64 gvsid;
int slb_index;
struct kvmppc_sid_map *map;
int r = 0;
slb_index = kvmppc_mmu_next_segment(vcpu, eaddr & ESID_MASK);
if (vcpu->arch.mmu.esid_to_vsid(vcpu, esid, &gvsid)) {
/* Invalidate an entry */
to_svcpu(vcpu)->slb[slb_index].esid = 0;
return -ENOENT;
svcpu->slb[slb_index].esid = 0;
r = -ENOENT;
goto out;
}
map = find_sid_vsid(vcpu, gvsid);
@ -269,18 +285,22 @@ int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr)
slb_vsid &= ~SLB_VSID_KP;
slb_esid |= slb_index;
to_svcpu(vcpu)->slb[slb_index].esid = slb_esid;
to_svcpu(vcpu)->slb[slb_index].vsid = slb_vsid;
svcpu->slb[slb_index].esid = slb_esid;
svcpu->slb[slb_index].vsid = slb_vsid;
trace_kvm_book3s_slbmte(slb_vsid, slb_esid);
return 0;
out:
svcpu_put(svcpu);
return r;
}
void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu)
{
to_svcpu(vcpu)->slb_max = 1;
to_svcpu(vcpu)->slb[0].esid = 0;
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
svcpu->slb_max = 1;
svcpu->slb[0].esid = 0;
svcpu_put(svcpu);
}
void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)

921
arch/powerpc/kvm/book3s_64_mmu_hv.c
View File

@ -23,6 +23,7 @@
#include <linux/gfp.h>
#include <linux/slab.h>
#include <linux/hugetlb.h>
#include <linux/vmalloc.h>
#include <asm/tlbflush.h>
#include <asm/kvm_ppc.h>
@ -33,15 +34,6 @@
#include <asm/ppc-opcode.h>
#include <asm/cputable.h>
/* For now use fixed-size 16MB page table */
#define HPT_ORDER 24
#define HPT_NPTEG (1ul << (HPT_ORDER - 7)) /* 128B per pteg */
#define HPT_HASH_MASK (HPT_NPTEG - 1)
/* Pages in the VRMA are 16MB pages */
#define VRMA_PAGE_ORDER 24
#define VRMA_VSID 0x1ffffffUL /* 1TB VSID reserved for VRMA */
/* POWER7 has 10-bit LPIDs, PPC970 has 6-bit LPIDs */
#define MAX_LPID_970 63
#define NR_LPIDS (LPID_RSVD + 1)
@ -51,21 +43,41 @@ long kvmppc_alloc_hpt(struct kvm *kvm)
{
unsigned long hpt;
unsigned long lpid;
struct revmap_entry *rev;
struct kvmppc_linear_info *li;
/* Allocate guest's hashed page table */
li = kvm_alloc_hpt();
if (li) {
/* using preallocated memory */
hpt = (ulong)li->base_virt;
kvm->arch.hpt_li = li;
} else {
/* using dynamic memory */
hpt = __get_free_pages(GFP_KERNEL|__GFP_ZERO|__GFP_REPEAT|
__GFP_NOWARN, HPT_ORDER - PAGE_SHIFT);
}
hpt = __get_free_pages(GFP_KERNEL|__GFP_ZERO|__GFP_REPEAT|__GFP_NOWARN,
HPT_ORDER - PAGE_SHIFT);
if (!hpt) {
pr_err("kvm_alloc_hpt: Couldn't alloc HPT\n");
return -ENOMEM;
}
kvm->arch.hpt_virt = hpt;
/* Allocate reverse map array */
rev = vmalloc(sizeof(struct revmap_entry) * HPT_NPTE);
if (!rev) {
pr_err("kvmppc_alloc_hpt: Couldn't alloc reverse map array\n");
goto out_freehpt;
}
kvm->arch.revmap = rev;
/* Allocate the guest's logical partition ID */
do {
lpid = find_first_zero_bit(lpid_inuse, NR_LPIDS);
if (lpid >= NR_LPIDS) {
pr_err("kvm_alloc_hpt: No LPIDs free\n");
free_pages(hpt, HPT_ORDER - PAGE_SHIFT);
return -ENOMEM;
goto out_freeboth;
}
} while (test_and_set_bit(lpid, lpid_inuse));
@ -74,37 +86,64 @@ long kvmppc_alloc_hpt(struct kvm *kvm)
pr_info("KVM guest htab at %lx, LPID %lx\n", hpt, lpid);
return 0;
out_freeboth:
vfree(rev);
out_freehpt:
free_pages(hpt, HPT_ORDER - PAGE_SHIFT);
return -ENOMEM;
}
void kvmppc_free_hpt(struct kvm *kvm)
{
clear_bit(kvm->arch.lpid, lpid_inuse);
free_pages(kvm->arch.hpt_virt, HPT_ORDER - PAGE_SHIFT);
vfree(kvm->arch.revmap);
if (kvm->arch.hpt_li)
kvm_release_hpt(kvm->arch.hpt_li);
else
free_pages(kvm->arch.hpt_virt, HPT_ORDER - PAGE_SHIFT);
}
void kvmppc_map_vrma(struct kvm *kvm, struct kvm_userspace_memory_region *mem)
/* Bits in first HPTE dword for pagesize 4k, 64k or 16M */
static inline unsigned long hpte0_pgsize_encoding(unsigned long pgsize)
{
return (pgsize > 0x1000) ? HPTE_V_LARGE : 0;
}
/* Bits in second HPTE dword for pagesize 4k, 64k or 16M */
static inline unsigned long hpte1_pgsize_encoding(unsigned long pgsize)
{
return (pgsize == 0x10000) ? 0x1000 : 0;
}
void kvmppc_map_vrma(struct kvm_vcpu *vcpu, struct kvm_memory_slot *memslot,
unsigned long porder)
{
unsigned long i;
unsigned long npages = kvm->arch.ram_npages;
unsigned long pfn;
unsigned long *hpte;
unsigned long hash;
struct kvmppc_pginfo *pginfo = kvm->arch.ram_pginfo;
unsigned long npages;
unsigned long hp_v, hp_r;
unsigned long addr, hash;
unsigned long psize;
unsigned long hp0, hp1;
long ret;
if (!pginfo)
return;
psize = 1ul << porder;
npages = memslot->npages >> (porder - PAGE_SHIFT);
/* VRMA can't be > 1TB */
if (npages > 1ul << (40 - kvm->arch.ram_porder))
npages = 1ul << (40 - kvm->arch.ram_porder);
if (npages > 1ul << (40 - porder))
npages = 1ul << (40 - porder);
/* Can't use more than 1 HPTE per HPTEG */
if (npages > HPT_NPTEG)
npages = HPT_NPTEG;
hp0 = HPTE_V_1TB_SEG | (VRMA_VSID << (40 - 16)) |
HPTE_V_BOLTED | hpte0_pgsize_encoding(psize);
hp1 = hpte1_pgsize_encoding(psize) |
HPTE_R_R | HPTE_R_C | HPTE_R_M | PP_RWXX;
for (i = 0; i < npages; ++i) {
pfn = pginfo[i].pfn;
if (!pfn)
break;
addr = i << porder;
/* can't use hpt_hash since va > 64 bits */
hash = (i ^ (VRMA_VSID ^ (VRMA_VSID << 25))) & HPT_HASH_MASK;
/*
@ -113,15 +152,15 @@ void kvmppc_map_vrma(struct kvm *kvm, struct kvm_userspace_memory_region *mem)
* at most one HPTE per HPTEG, we just assume entry 7
* is available and use it.
*/
hpte = (unsigned long *) (kvm->arch.hpt_virt + (hash << 7));
hpte += 7 * 2;
/* HPTE low word - RPN, protection, etc. */
hpte[1] = (pfn << PAGE_SHIFT) | HPTE_R_R | HPTE_R_C |
HPTE_R_M | PP_RWXX;
wmb();
hpte[0] = HPTE_V_1TB_SEG | (VRMA_VSID << (40 - 16)) |
(i << (VRMA_PAGE_ORDER - 16)) | HPTE_V_BOLTED |
HPTE_V_LARGE | HPTE_V_VALID;
hash = (hash << 3) + 7;
hp_v = hp0 | ((addr >> 16) & ~0x7fUL);
hp_r = hp1 | addr;
ret = kvmppc_virtmode_h_enter(vcpu, H_EXACT, hash, hp_v, hp_r);
if (ret != H_SUCCESS) {
pr_err("KVM: map_vrma at %lx failed, ret=%ld\n",
addr, ret);
break;
}
}
}
@ -158,10 +197,814 @@ static void kvmppc_mmu_book3s_64_hv_reset_msr(struct kvm_vcpu *vcpu)
kvmppc_set_msr(vcpu, MSR_SF | MSR_ME);
}
static int kvmppc_mmu_book3s_64_hv_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
struct kvmppc_pte *gpte, bool data)
/*
* This is called to get a reference to a guest page if there isn't
* one already in the kvm->arch.slot_phys[][] arrays.
*/
static long kvmppc_get_guest_page(struct kvm *kvm, unsigned long gfn,
struct kvm_memory_slot *memslot,
unsigned long psize)
{
return -ENOENT;
unsigned long start;
long np, err;
struct page *page, *hpage, *pages[1];
unsigned long s, pgsize;
unsigned long *physp;
unsigned int is_io, got, pgorder;
struct vm_area_struct *vma;
unsigned long pfn, i, npages;
physp = kvm->arch.slot_phys[memslot->id];
if (!physp)
return -EINVAL;
if (physp[gfn - memslot->base_gfn])
return 0;
is_io = 0;
got = 0;
page = NULL;
pgsize = psize;
err = -EINVAL;
start = gfn_to_hva_memslot(memslot, gfn);
/* Instantiate and get the page we want access to */
np = get_user_pages_fast(start, 1, 1, pages);
if (np != 1) {
/* Look up the vma for the page */
down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, start);
if (!vma || vma->vm_start > start ||
start + psize > vma->vm_end ||
!(vma->vm_flags & VM_PFNMAP))
goto up_err;
is_io = hpte_cache_bits(pgprot_val(vma->vm_page_prot));
pfn = vma->vm_pgoff + ((start - vma->vm_start) >> PAGE_SHIFT);
/* check alignment of pfn vs. requested page size */
if (psize > PAGE_SIZE && (pfn & ((psize >> PAGE_SHIFT) - 1)))
goto up_err;
up_read(&current->mm->mmap_sem);
} else {
page = pages[0];
got = KVMPPC_GOT_PAGE;
/* See if this is a large page */
s = PAGE_SIZE;
if (PageHuge(page)) {
hpage = compound_head(page);
s <<= compound_order(hpage);
/* Get the whole large page if slot alignment is ok */
if (s > psize && slot_is_aligned(memslot, s) &&
!(memslot->userspace_addr & (s - 1))) {
start &= ~(s - 1);
pgsize = s;
page = hpage;
}
}
if (s < psize)
goto out;
pfn = page_to_pfn(page);
}
npages = pgsize >> PAGE_SHIFT;
pgorder = __ilog2(npages);
physp += (gfn - memslot->base_gfn) & ~(npages - 1);
spin_lock(&kvm->arch.slot_phys_lock);
for (i = 0; i < npages; ++i) {
if (!physp[i]) {
physp[i] = ((pfn + i) << PAGE_SHIFT) +
got + is_io + pgorder;
got = 0;
}
}
spin_unlock(&kvm->arch.slot_phys_lock);
err = 0;
out:
if (got) {
if (PageHuge(page))
page = compound_head(page);
put_page(page);
}
return err;
up_err:
up_read(&current->mm->mmap_sem);
return err;
}
/*
* We come here on a H_ENTER call from the guest when we are not
* using mmu notifiers and we don't have the requested page pinned
* already.
*/
long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
long pte_index, unsigned long pteh, unsigned long ptel)
{
struct kvm *kvm = vcpu->kvm;
unsigned long psize, gpa, gfn;
struct kvm_memory_slot *memslot;
long ret;
if (kvm->arch.using_mmu_notifiers)
goto do_insert;
psize = hpte_page_size(pteh, ptel);
if (!psize)
return H_PARAMETER;
pteh &= ~(HPTE_V_HVLOCK | HPTE_V_ABSENT | HPTE_V_VALID);
/* Find the memslot (if any) for this address */
gpa = (ptel & HPTE_R_RPN) & ~(psize - 1);
gfn = gpa >> PAGE_SHIFT;
memslot = gfn_to_memslot(kvm, gfn);
if (memslot && !(memslot->flags & KVM_MEMSLOT_INVALID)) {
if (!slot_is_aligned(memslot, psize))
return H_PARAMETER;
if (kvmppc_get_guest_page(kvm, gfn, memslot, psize) < 0)
return H_PARAMETER;
}
do_insert:
/* Protect linux PTE lookup from page table destruction */
rcu_read_lock_sched(); /* this disables preemption too */
vcpu->arch.pgdir = current->mm->pgd;
ret = kvmppc_h_enter(vcpu, flags, pte_index, pteh, ptel);
rcu_read_unlock_sched();
if (ret == H_TOO_HARD) {
/* this can't happen */
pr_err("KVM: Oops, kvmppc_h_enter returned too hard!\n");
ret = H_RESOURCE; /* or something */
}
return ret;
}
static struct kvmppc_slb *kvmppc_mmu_book3s_hv_find_slbe(struct kvm_vcpu *vcpu,
gva_t eaddr)
{
u64 mask;
int i;
for (i = 0; i < vcpu->arch.slb_nr; i++) {
if (!(vcpu->arch.slb[i].orige & SLB_ESID_V))
continue;
if (vcpu->arch.slb[i].origv & SLB_VSID_B_1T)
mask = ESID_MASK_1T;
else
mask = ESID_MASK;
if (((vcpu->arch.slb[i].orige ^ eaddr) & mask) == 0)
return &vcpu->arch.slb[i];
}
return NULL;
}
static unsigned long kvmppc_mmu_get_real_addr(unsigned long v, unsigned long r,
unsigned long ea)
{
unsigned long ra_mask;
ra_mask = hpte_page_size(v, r) - 1;
return (r & HPTE_R_RPN & ~ra_mask) | (ea & ra_mask);
}
static int kvmppc_mmu_book3s_64_hv_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
struct kvmppc_pte *gpte, bool data)
{
struct kvm *kvm = vcpu->kvm;
struct kvmppc_slb *slbe;
unsigned long slb_v;
unsigned long pp, key;
unsigned long v, gr;
unsigned long *hptep;
int index;
int virtmode = vcpu->arch.shregs.msr & (data ? MSR_DR : MSR_IR);
/* Get SLB entry */
if (virtmode) {
slbe = kvmppc_mmu_book3s_hv_find_slbe(vcpu, eaddr);
if (!slbe)
return -EINVAL;
slb_v = slbe->origv;
} else {
/* real mode access */
slb_v = vcpu->kvm->arch.vrma_slb_v;
}
/* Find the HPTE in the hash table */
index = kvmppc_hv_find_lock_hpte(kvm, eaddr, slb_v,
HPTE_V_VALID | HPTE_V_ABSENT);
if (index < 0)
return -ENOENT;
hptep = (unsigned long *)(kvm->arch.hpt_virt + (index << 4));
v = hptep[0] & ~HPTE_V_HVLOCK;
gr = kvm->arch.revmap[index].guest_rpte;
/* Unlock the HPTE */
asm volatile("lwsync" : : : "memory");
hptep[0] = v;
gpte->eaddr = eaddr;
gpte->vpage = ((v & HPTE_V_AVPN) << 4) | ((eaddr >> 12) & 0xfff);
/* Get PP bits and key for permission check */
pp = gr & (HPTE_R_PP0 | HPTE_R_PP);
key = (vcpu->arch.shregs.msr & MSR_PR) ? SLB_VSID_KP : SLB_VSID_KS;
key &= slb_v;
/* Calculate permissions */
gpte->may_read = hpte_read_permission(pp, key);
gpte->may_write = hpte_write_permission(pp, key);
gpte->may_execute = gpte->may_read && !(gr & (HPTE_R_N | HPTE_R_G));
/* Storage key permission check for POWER7 */
if (data && virtmode && cpu_has_feature(CPU_FTR_ARCH_206)) {
int amrfield = hpte_get_skey_perm(gr, vcpu->arch.amr);
if (amrfield & 1)
gpte->may_read = 0;
if (amrfield & 2)
gpte->may_write = 0;
}
/* Get the guest physical address */
gpte->raddr = kvmppc_mmu_get_real_addr(v, gr, eaddr);
return 0;
}
/*
* Quick test for whether an instruction is a load or a store.
* If the instruction is a load or a store, then this will indicate
* which it is, at least on server processors. (Embedded processors
* have some external PID instructions that don't follow the rule
* embodied here.) If the instruction isn't a load or store, then
* this doesn't return anything useful.
*/
static int instruction_is_store(unsigned int instr)
{
unsigned int mask;
mask = 0x10000000;
if ((instr & 0xfc000000) == 0x7c000000)
mask = 0x100; /* major opcode 31 */
return (instr & mask) != 0;
}
static int kvmppc_hv_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned long gpa, int is_store)
{
int ret;
u32 last_inst;
unsigned long srr0 = kvmppc_get_pc(vcpu);
/* We try to load the last instruction. We don't let
* emulate_instruction do it as it doesn't check what
* kvmppc_ld returns.
* If we fail, we just return to the guest and try executing it again.
*/
if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED) {
ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
if (ret != EMULATE_DONE || last_inst == KVM_INST_FETCH_FAILED)
return RESUME_GUEST;
vcpu->arch.last_inst = last_inst;
}
/*
* WARNING: We do not know for sure whether the instruction we just
* read from memory is the same that caused the fault in the first
* place. If the instruction we read is neither an load or a store,
* then it can't access memory, so we don't need to worry about
* enforcing access permissions. So, assuming it is a load or
* store, we just check that its direction (load or store) is
* consistent with the original fault, since that's what we
* checked the access permissions against. If there is a mismatch
* we just return and retry the instruction.
*/
if (instruction_is_store(vcpu->arch.last_inst) != !!is_store)
return RESUME_GUEST;
/*
* Emulated accesses are emulated by looking at the hash for
* translation once, then performing the access later. The
* translation could be invalidated in the meantime in which
* point performing the subsequent memory access on the old
* physical address could possibly be a security hole for the
* guest (but not the host).
*
* This is less of an issue for MMIO stores since they aren't
* globally visible. It could be an issue for MMIO loads to
* a certain extent but we'll ignore it for now.
*/
vcpu->arch.paddr_accessed = gpa;
return kvmppc_emulate_mmio(run, vcpu);
}
int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned long ea, unsigned long dsisr)
{
struct kvm *kvm = vcpu->kvm;
unsigned long *hptep, hpte[3], r;
unsigned long mmu_seq, psize, pte_size;
unsigned long gfn, hva, pfn;
struct kvm_memory_slot *memslot;
unsigned long *rmap;
struct revmap_entry *rev;
struct page *page, *pages[1];
long index, ret, npages;
unsigned long is_io;
unsigned int writing, write_ok;
struct vm_area_struct *vma;
unsigned long rcbits;
/*
* Real-mode code has already searched the HPT and found the
* entry we're interested in. Lock the entry and check that
* it hasn't changed. If it has, just return and re-execute the
* instruction.
*/
if (ea != vcpu->arch.pgfault_addr)
return RESUME_GUEST;
index = vcpu->arch.pgfault_index;
hptep = (unsigned long *)(kvm->arch.hpt_virt + (index << 4));
rev = &kvm->arch.revmap[index];
preempt_disable();
while (!try_lock_hpte(hptep, HPTE_V_HVLOCK))
cpu_relax();
hpte[0] = hptep[0] & ~HPTE_V_HVLOCK;
hpte[1] = hptep[1];
hpte[2] = r = rev->guest_rpte;
asm volatile("lwsync" : : : "memory");
hptep[0] = hpte[0];
preempt_enable();
if (hpte[0] != vcpu->arch.pgfault_hpte[0] ||
hpte[1] != vcpu->arch.pgfault_hpte[1])
return RESUME_GUEST;
/* Translate the logical address and get the page */
psize = hpte_page_size(hpte[0], r);
gfn = hpte_rpn(r, psize);
memslot = gfn_to_memslot(kvm, gfn);
/* No memslot means it's an emulated MMIO region */
if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) {
unsigned long gpa = (gfn << PAGE_SHIFT) | (ea & (psize - 1));
return kvmppc_hv_emulate_mmio(run, vcpu, gpa,
dsisr & DSISR_ISSTORE);
}
if (!kvm->arch.using_mmu_notifiers)
return -EFAULT; /* should never get here */
/* used to check for invalidations in progress */
mmu_seq = kvm->mmu_notifier_seq;
smp_rmb();
is_io = 0;
pfn = 0;
page = NULL;
pte_size = PAGE_SIZE;
writing = (dsisr & DSISR_ISSTORE) != 0;
/* If writing != 0, then the HPTE must allow writing, if we get here */
write_ok = writing;
hva = gfn_to_hva_memslot(memslot, gfn);
npages = get_user_pages_fast(hva, 1, writing, pages);
if (npages < 1) {
/* Check if it's an I/O mapping */
down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, hva);
if (vma && vma->vm_start <= hva && hva + psize <= vma->vm_end &&
(vma->vm_flags & VM_PFNMAP)) {
pfn = vma->vm_pgoff +
((hva - vma->vm_start) >> PAGE_SHIFT);
pte_size = psize;
is_io = hpte_cache_bits(pgprot_val(vma->vm_page_prot));
write_ok = vma->vm_flags & VM_WRITE;
}
up_read(&current->mm->mmap_sem);
if (!pfn)
return -EFAULT;
} else {
page = pages[0];
if (PageHuge(page)) {
page = compound_head(page);
pte_size <<= compound_order(page);
}
/* if the guest wants write access, see if that is OK */
if (!writing && hpte_is_writable(r)) {
pte_t *ptep, pte;
/*
* We need to protect against page table destruction
* while looking up and updating the pte.
*/
rcu_read_lock_sched();
ptep = find_linux_pte_or_hugepte(current->mm->pgd,
hva, NULL);
if (ptep && pte_present(*ptep)) {
pte = kvmppc_read_update_linux_pte(ptep, 1);
if (pte_write(pte))
write_ok = 1;
}
rcu_read_unlock_sched();
}
pfn = page_to_pfn(page);
}
ret = -EFAULT;
if (psize > pte_size)
goto out_put;
/* Check WIMG vs. the actual page we're accessing */
if (!hpte_cache_flags_ok(r, is_io)) {
if (is_io)
return -EFAULT;
/*
* Allow guest to map emulated device memory as
* uncacheable, but actually make it cacheable.
*/
r = (r & ~(HPTE_R_W|HPTE_R_I|HPTE_R_G)) | HPTE_R_M;
}
/* Set the HPTE to point to pfn */
r = (r & ~(HPTE_R_PP0 - pte_size)) | (pfn << PAGE_SHIFT);
if (hpte_is_writable(r) && !write_ok)
r = hpte_make_readonly(r);
ret = RESUME_GUEST;
preempt_disable();
while (!try_lock_hpte(hptep, HPTE_V_HVLOCK))
cpu_relax();
if ((hptep[0] & ~HPTE_V_HVLOCK) != hpte[0] || hptep[1] != hpte[1] ||
rev->guest_rpte != hpte[2])
/* HPTE has been changed under us; let the guest retry */
goto out_unlock;
hpte[0] = (hpte[0] & ~HPTE_V_ABSENT) | HPTE_V_VALID;
rmap = &memslot->rmap[gfn - memslot->base_gfn];
lock_rmap(rmap);
/* Check if we might have been invalidated; let the guest retry if so */
ret = RESUME_GUEST;
if (mmu_notifier_retry(vcpu, mmu_seq)) {
unlock_rmap(rmap);
goto out_unlock;
}
/* Only set R/C in real HPTE if set in both *rmap and guest_rpte */
rcbits = *rmap >> KVMPPC_RMAP_RC_SHIFT;
r &= rcbits | ~(HPTE_R_R | HPTE_R_C);
if (hptep[0] & HPTE_V_VALID) {
/* HPTE was previously valid, so we need to invalidate it */
unlock_rmap(rmap);
hptep[0] |= HPTE_V_ABSENT;
kvmppc_invalidate_hpte(kvm, hptep, index);
/* don't lose previous R and C bits */
r |= hptep[1] & (HPTE_R_R | HPTE_R_C);
} else {
kvmppc_add_revmap_chain(kvm, rev, rmap, index, 0);
}
hptep[1] = r;
eieio();
hptep[0] = hpte[0];
asm volatile("ptesync" : : : "memory");
preempt_enable();
if (page && hpte_is_writable(r))
SetPageDirty(page);
out_put:
if (page)
put_page(page);
return ret;
out_unlock:
hptep[0] &= ~HPTE_V_HVLOCK;
preempt_enable();
goto out_put;
}
static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
int (*handler)(struct kvm *kvm, unsigned long *rmapp,
unsigned long gfn))
{
int ret;
int retval = 0;
struct kvm_memslots *slots;
struct kvm_memory_slot *memslot;
slots = kvm_memslots(kvm);
kvm_for_each_memslot(memslot, slots) {
unsigned long start = memslot->userspace_addr;
unsigned long end;
end = start + (memslot->npages << PAGE_SHIFT);
if (hva >= start && hva < end) {
gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT;
ret = handler(kvm, &memslot->rmap[gfn_offset],
memslot->base_gfn + gfn_offset);
retval |= ret;
}
}
return retval;
}
static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp,
unsigned long gfn)
{
struct revmap_entry *rev = kvm->arch.revmap;
unsigned long h, i, j;
unsigned long *hptep;
unsigned long ptel, psize, rcbits;
for (;;) {
lock_rmap(rmapp);
if (!(*rmapp & KVMPPC_RMAP_PRESENT)) {
unlock_rmap(rmapp);
break;
}
/*
* To avoid an ABBA deadlock with the HPTE lock bit,
* we can't spin on the HPTE lock while holding the
* rmap chain lock.
*/
i = *rmapp & KVMPPC_RMAP_INDEX;
hptep = (unsigned long *) (kvm->arch.hpt_virt + (i << 4));
if (!try_lock_hpte(hptep, HPTE_V_HVLOCK)) {
/* unlock rmap before spinning on the HPTE lock */
unlock_rmap(rmapp);
while (hptep[0] & HPTE_V_HVLOCK)
cpu_relax();
continue;
}
j = rev[i].forw;
if (j == i) {
/* chain is now empty */
*rmapp &= ~(KVMPPC_RMAP_PRESENT | KVMPPC_RMAP_INDEX);
} else {
/* remove i from chain */
h = rev[i].back;
rev[h].forw = j;
rev[j].back = h;
rev[i].forw = rev[i].back = i;
*rmapp = (*rmapp & ~KVMPPC_RMAP_INDEX) | j;
}
/* Now check and modify the HPTE */
ptel = rev[i].guest_rpte;
psize = hpte_page_size(hptep[0], ptel);
if ((hptep[0] & HPTE_V_VALID) &&
hpte_rpn(ptel, psize) == gfn) {
hptep[0] |= HPTE_V_ABSENT;
kvmppc_invalidate_hpte(kvm, hptep, i);
/* Harvest R and C */
rcbits = hptep[1] & (HPTE_R_R | HPTE_R_C);
*rmapp |= rcbits << KVMPPC_RMAP_RC_SHIFT;
rev[i].guest_rpte = ptel | rcbits;
}
unlock_rmap(rmapp);
hptep[0] &= ~HPTE_V_HVLOCK;
}
return 0;
}
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
{
if (kvm->arch.using_mmu_notifiers)
kvm_handle_hva(kvm, hva, kvm_unmap_rmapp);
return 0;
}
static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp,
unsigned long gfn)
{
struct revmap_entry *rev = kvm->arch.revmap;
unsigned long head, i, j;
unsigned long *hptep;
int ret = 0;
retry:
lock_rmap(rmapp);
if (*rmapp & KVMPPC_RMAP_REFERENCED) {
*rmapp &= ~KVMPPC_RMAP_REFERENCED;
ret = 1;
}
if (!(*rmapp & KVMPPC_RMAP_PRESENT)) {
unlock_rmap(rmapp);
return ret;
}
i = head = *rmapp & KVMPPC_RMAP_INDEX;
do {
hptep = (unsigned long *) (kvm->arch.hpt_virt + (i << 4));
j = rev[i].forw;
/* If this HPTE isn't referenced, ignore it */
if (!(hptep[1] & HPTE_R_R))
continue;
if (!try_lock_hpte(hptep, HPTE_V_HVLOCK)) {
/* unlock rmap before spinning on the HPTE lock */
unlock_rmap(rmapp);
while (hptep[0] & HPTE_V_HVLOCK)
cpu_relax();
goto retry;
}
/* Now check and modify the HPTE */
if ((hptep[0] & HPTE_V_VALID) && (hptep[1] & HPTE_R_R)) {
kvmppc_clear_ref_hpte(kvm, hptep, i);
rev[i].guest_rpte |= HPTE_R_R;
ret = 1;
}
hptep[0] &= ~HPTE_V_HVLOCK;
} while ((i = j) != head);
unlock_rmap(rmapp);
return ret;
}
int kvm_age_hva(struct kvm *kvm, unsigned long hva)
{
if (!kvm->arch.using_mmu_notifiers)
return 0;
return kvm_handle_hva(kvm, hva, kvm_age_rmapp);
}
static int kvm_test_age_rmapp(struct kvm *kvm, unsigned long *rmapp,
unsigned long gfn)
{
struct revmap_entry *rev = kvm->arch.revmap;
unsigned long head, i, j;
unsigned long *hp;
int ret = 1;
if (*rmapp & KVMPPC_RMAP_REFERENCED)
return 1;
lock_rmap(rmapp);
if (*rmapp & KVMPPC_RMAP_REFERENCED)
goto out;
if (*rmapp & KVMPPC_RMAP_PRESENT) {
i = head = *rmapp & KVMPPC_RMAP_INDEX;
do {
hp = (unsigned long *)(kvm->arch.hpt_virt + (i << 4));
j = rev[i].forw;
if (hp[1] & HPTE_R_R)
goto out;
} while ((i = j) != head);
}
ret = 0;
out:
unlock_rmap(rmapp);
return ret;
}
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
{
if (!kvm->arch.using_mmu_notifiers)
return 0;
return kvm_handle_hva(kvm, hva, kvm_test_age_rmapp);
}
void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
{
if (!kvm->arch.using_mmu_notifiers)
return;
kvm_handle_hva(kvm, hva, kvm_unmap_rmapp);
}
static int kvm_test_clear_dirty(struct kvm *kvm, unsigned long *rmapp)
{
struct revmap_entry *rev = kvm->arch.revmap;
unsigned long head, i, j;
unsigned long *hptep;
int ret = 0;
retry:
lock_rmap(rmapp);
if (*rmapp & KVMPPC_RMAP_CHANGED) {
*rmapp &= ~KVMPPC_RMAP_CHANGED;
ret = 1;
}
if (!(*rmapp & KVMPPC_RMAP_PRESENT)) {
unlock_rmap(rmapp);
return ret;
}
i = head = *rmapp & KVMPPC_RMAP_INDEX;
do {
hptep = (unsigned long *) (kvm->arch.hpt_virt + (i << 4));
j = rev[i].forw;
if (!(hptep[1] & HPTE_R_C))
continue;
if (!try_lock_hpte(hptep, HPTE_V_HVLOCK)) {
/* unlock rmap before spinning on the HPTE lock */
unlock_rmap(rmapp);
while (hptep[0] & HPTE_V_HVLOCK)
cpu_relax();
goto retry;
}
/* Now check and modify the HPTE */
if ((hptep[0] & HPTE_V_VALID) && (hptep[1] & HPTE_R_C)) {
/* need to make it temporarily absent to clear C */
hptep[0] |= HPTE_V_ABSENT;
kvmppc_invalidate_hpte(kvm, hptep, i);
hptep[1] &= ~HPTE_R_C;
eieio();
hptep[0] = (hptep[0] & ~HPTE_V_ABSENT) | HPTE_V_VALID;
rev[i].guest_rpte |= HPTE_R_C;
ret = 1;
}
hptep[0] &= ~HPTE_V_HVLOCK;
} while ((i = j) != head);
unlock_rmap(rmapp);
return ret;
}
long kvmppc_hv_get_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
{
unsigned long i;
unsigned long *rmapp, *map;
preempt_disable();
rmapp = memslot->rmap;
map = memslot->dirty_bitmap;
for (i = 0; i < memslot->npages; ++i) {
if (kvm_test_clear_dirty(kvm, rmapp))
__set_bit_le(i, map);
++rmapp;
}
preempt_enable();
return 0;
}
void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa,
unsigned long *nb_ret)
{
struct kvm_memory_slot *memslot;
unsigned long gfn = gpa >> PAGE_SHIFT;
struct page *page, *pages[1];
int npages;
unsigned long hva, psize, offset;
unsigned long pa;
unsigned long *physp;
memslot = gfn_to_memslot(kvm, gfn);
if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
return NULL;
if (!kvm->arch.using_mmu_notifiers) {
physp = kvm->arch.slot_phys[memslot->id];
if (!physp)
return NULL;
physp += gfn - memslot->base_gfn;
pa = *physp;
if (!pa) {
if (kvmppc_get_guest_page(kvm, gfn, memslot,
PAGE_SIZE) < 0)
return NULL;
pa = *physp;
}
page = pfn_to_page(pa >> PAGE_SHIFT);
} else {
hva = gfn_to_hva_memslot(memslot, gfn);
npages = get_user_pages_fast(hva, 1, 1, pages);
if (npages < 1)
return NULL;
page = pages[0];
}
psize = PAGE_SIZE;
if (PageHuge(page)) {
page = compound_head(page);
psize <<= compound_order(page);
}
if (!kvm->arch.using_mmu_notifiers)
get_page(page);
offset = gpa & (psize - 1);
if (nb_ret)
*nb_ret = psize - offset;
return page_address(page) + offset;
}
void kvmppc_unpin_guest_page(struct kvm *kvm, void *va)
{
struct page *page = virt_to_page(va);
page = compound_head(page);
put_page(page);
}
void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu)

8
arch/powerpc/kvm/book3s_emulate.c
View File

@ -230,9 +230,12 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
r = kvmppc_st(vcpu, &addr, 32, zeros, true);
if ((r == -ENOENT) || (r == -EPERM)) {
struct kvmppc_book3s_shadow_vcpu *svcpu;
svcpu = svcpu_get(vcpu);
*advance = 0;
vcpu->arch.shared->dar = vaddr;
to_svcpu(vcpu)->fault_dar = vaddr;
svcpu->fault_dar = vaddr;
dsisr = DSISR_ISSTORE;
if (r == -ENOENT)
@ -241,7 +244,8 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
dsisr |= DSISR_PROTFAULT;
vcpu->arch.shared->dsisr = dsisr;
to_svcpu(vcpu)->fault_dsisr = dsisr;
svcpu->fault_dsisr = dsisr;
svcpu_put(svcpu);
kvmppc_book3s_queue_irqprio(vcpu,
BOOK3S_INTERRUPT_DATA_STORAGE);

465
arch/powerpc/kvm/book3s_hv.c
View File

@ -48,22 +48,14 @@
#include <linux/gfp.h>
#include <linux/vmalloc.h>
#include <linux/highmem.h>
/*
* For now, limit memory to 64GB and require it to be large pages.
* This value is chosen because it makes the ram_pginfo array be
* 64kB in size, which is about as large as we want to be trying
* to allocate with kmalloc.
*/
#define MAX_MEM_ORDER 36
#define LARGE_PAGE_ORDER 24 /* 16MB pages */
#include <linux/hugetlb.h>
/* #define EXIT_DEBUG */
/* #define EXIT_DEBUG_SIMPLE */
/* #define EXIT_DEBUG_INT */
static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu);
void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
@ -146,10 +138,10 @@ static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
unsigned long vcpuid, unsigned long vpa)
{
struct kvm *kvm = vcpu->kvm;
unsigned long pg_index, ra, len;
unsigned long pg_offset;
unsigned long len, nb;
void *va;
struct kvm_vcpu *tvcpu;
int err = H_PARAMETER;
tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
if (!tvcpu)
@ -162,45 +154,41 @@ static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
if (flags < 4) {
if (vpa & 0x7f)
return H_PARAMETER;
if (flags >= 2 && !tvcpu->arch.vpa)
return H_RESOURCE;
/* registering new area; convert logical addr to real */
pg_index = vpa >> kvm->arch.ram_porder;
pg_offset = vpa & (kvm->arch.ram_psize - 1);
if (pg_index >= kvm->arch.ram_npages)
va = kvmppc_pin_guest_page(kvm, vpa, &nb);
if (va == NULL)
return H_PARAMETER;
if (kvm->arch.ram_pginfo[pg_index].pfn == 0)
return H_PARAMETER;
ra = kvm->arch.ram_pginfo[pg_index].pfn << PAGE_SHIFT;
ra |= pg_offset;
va = __va(ra);
if (flags <= 1)
len = *(unsigned short *)(va + 4);
else
len = *(unsigned int *)(va + 4);
if (pg_offset + len > kvm->arch.ram_psize)
return H_PARAMETER;
if (len > nb)
goto out_unpin;
switch (flags) {
case 1: /* register VPA */
if (len < 640)
return H_PARAMETER;
goto out_unpin;
if (tvcpu->arch.vpa)
kvmppc_unpin_guest_page(kvm, vcpu->arch.vpa);
tvcpu->arch.vpa = va;
init_vpa(vcpu, va);
break;
case 2: /* register DTL */
if (len < 48)
return H_PARAMETER;
if (!tvcpu->arch.vpa)
return H_RESOURCE;
goto out_unpin;
len -= len % 48;
if (tvcpu->arch.dtl)
kvmppc_unpin_guest_page(kvm, vcpu->arch.dtl);
tvcpu->arch.dtl = va;
tvcpu->arch.dtl_end = va + len;
break;
case 3: /* register SLB shadow buffer */
if (len < 8)
return H_PARAMETER;
if (!tvcpu->arch.vpa)
return H_RESOURCE;
tvcpu->arch.slb_shadow = va;
len = (len - 16) / 16;
if (len < 16)
goto out_unpin;
if (tvcpu->arch.slb_shadow)
kvmppc_unpin_guest_page(kvm, vcpu->arch.slb_shadow);
tvcpu->arch.slb_shadow = va;
break;
}
@ -209,17 +197,30 @@ static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
case 5: /* unregister VPA */
if (tvcpu->arch.slb_shadow || tvcpu->arch.dtl)
return H_RESOURCE;
if (!tvcpu->arch.vpa)
break;
kvmppc_unpin_guest_page(kvm, tvcpu->arch.vpa);
tvcpu->arch.vpa = NULL;
break;
case 6: /* unregister DTL */
if (!tvcpu->arch.dtl)
break;
kvmppc_unpin_guest_page(kvm, tvcpu->arch.dtl);
tvcpu->arch.dtl = NULL;
break;
case 7: /* unregister SLB shadow buffer */
if (!tvcpu->arch.slb_shadow)
break;
kvmppc_unpin_guest_page(kvm, tvcpu->arch.slb_shadow);
tvcpu->arch.slb_shadow = NULL;
break;
}
}
return H_SUCCESS;
out_unpin:
kvmppc_unpin_guest_page(kvm, va);
return err;
}
int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
@ -229,6 +230,12 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
struct kvm_vcpu *tvcpu;
switch (req) {
case H_ENTER:
ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4),
kvmppc_get_gpr(vcpu, 5),
kvmppc_get_gpr(vcpu, 6),
kvmppc_get_gpr(vcpu, 7));
break;
case H_CEDE:
break;
case H_PROD:
@ -318,20 +325,19 @@ static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
break;
}
/*
* We get these next two if the guest does a bad real-mode access,
* as we have enabled VRMA (virtualized real mode area) mode in the
* LPCR. We just generate an appropriate DSI/ISI to the guest.
* We get these next two if the guest accesses a page which it thinks
* it has mapped but which is not actually present, either because
* it is for an emulated I/O device or because the corresonding
* host page has been paged out. Any other HDSI/HISI interrupts
* have been handled already.
*/
case BOOK3S_INTERRUPT_H_DATA_STORAGE:
vcpu->arch.shregs.dsisr = vcpu->arch.fault_dsisr;
vcpu->arch.shregs.dar = vcpu->arch.fault_dar;
kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
r = RESUME_GUEST;
r = kvmppc_book3s_hv_page_fault(run, vcpu,
vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
break;
case BOOK3S_INTERRUPT_H_INST_STORAGE:
kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE,
0x08000000);
r = RESUME_GUEST;
r = kvmppc_book3s_hv_page_fault(run, vcpu,
kvmppc_get_pc(vcpu), 0);
break;
/*
* This occurs if the guest executes an illegal instruction.
@ -391,6 +397,42 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
return 0;
}
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
int r = -EINVAL;
switch (reg->id) {
case KVM_REG_PPC_HIOR:
r = put_user(0, (u64 __user *)reg->addr);
break;
default:
break;
}
return r;
}
int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
int r = -EINVAL;
switch (reg->id) {
case KVM_REG_PPC_HIOR:
{
u64 hior;
/* Only allow this to be set to zero */
r = get_user(hior, (u64 __user *)reg->addr);
if (!r && (hior != 0))
r = -EINVAL;
break;
}
default:
break;
}
return r;
}
int kvmppc_core_check_processor_compat(void)
{
if (cpu_has_feature(CPU_FTR_HVMODE))
@ -410,7 +452,7 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
goto out;
err = -ENOMEM;
vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
if (!vcpu)
goto out;
@ -462,15 +504,21 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
return vcpu;
free_vcpu:
kfree(vcpu);
kmem_cache_free(kvm_vcpu_cache, vcpu);
out:
return ERR_PTR(err);
}
void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
{
if (vcpu->arch.dtl)
kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.dtl);
if (vcpu->arch.slb_shadow)
kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.slb_shadow);
if (vcpu->arch.vpa)
kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.vpa);
kvm_vcpu_uninit(vcpu);
kfree(vcpu);
kmem_cache_free(kvm_vcpu_cache, vcpu);
}
static void kvmppc_set_timer(struct kvm_vcpu *vcpu)
@ -481,7 +529,7 @@ static void kvmppc_set_timer(struct kvm_vcpu *vcpu)
if (now > vcpu->arch.dec_expires) {
/* decrementer has already gone negative */
kvmppc_core_queue_dec(vcpu);
kvmppc_core_deliver_interrupts(vcpu);
kvmppc_core_prepare_to_enter(vcpu);
return;
}
dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC
@ -796,7 +844,7 @@ static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
list_for_each_entry_safe(v, vn, &vc->runnable_threads,
arch.run_list) {
kvmppc_core_deliver_interrupts(v);
kvmppc_core_prepare_to_enter(v);
if (signal_pending(v->arch.run_task)) {
kvmppc_remove_runnable(vc, v);
v->stat.signal_exits++;
@ -835,20 +883,26 @@ int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
return -EINVAL;
}
kvmppc_core_prepare_to_enter(vcpu);
/* No need to go into the guest when all we'll do is come back out */
if (signal_pending(current)) {
run->exit_reason = KVM_EXIT_INTR;
return -EINTR;
}
/* On PPC970, check that we have an RMA region */
if (!vcpu->kvm->arch.rma && cpu_has_feature(CPU_FTR_ARCH_201))
return -EPERM;
/* On the first time here, set up VRMA or RMA */
if (!vcpu->kvm->arch.rma_setup_done) {
r = kvmppc_hv_setup_rma(vcpu);
if (r)
return r;
}
flush_fp_to_thread(current);
flush_altivec_to_thread(current);
flush_vsx_to_thread(current);
vcpu->arch.wqp = &vcpu->arch.vcore->wq;
vcpu->arch.pgdir = current->mm->pgd;
do {
r = kvmppc_run_vcpu(run, vcpu);
@ -856,7 +910,7 @@ int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
if (run->exit_reason == KVM_EXIT_PAPR_HCALL &&
!(vcpu->arch.shregs.msr & MSR_PR)) {
r = kvmppc_pseries_do_hcall(vcpu);
kvmppc_core_deliver_interrupts(vcpu);
kvmppc_core_prepare_to_enter(vcpu);
}
} while (r == RESUME_GUEST);
return r;
@ -1000,7 +1054,7 @@ static inline int lpcr_rmls(unsigned long rma_size)
static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct kvmppc_rma_info *ri = vma->vm_file->private_data;
struct kvmppc_linear_info *ri = vma->vm_file->private_data;
struct page *page;
if (vmf->pgoff >= ri->npages)
@ -1025,7 +1079,7 @@ static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma)
static int kvm_rma_release(struct inode *inode, struct file *filp)
{
struct kvmppc_rma_info *ri = filp->private_data;
struct kvmppc_linear_info *ri = filp->private_data;
kvm_release_rma(ri);
return 0;
@ -1038,7 +1092,7 @@ static struct file_operations kvm_rma_fops = {
long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret)
{
struct kvmppc_rma_info *ri;
struct kvmppc_linear_info *ri;
long fd;
ri = kvm_alloc_rma();
@ -1053,89 +1107,189 @@ long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret)
return fd;
}
static struct page *hva_to_page(unsigned long addr)
/*
* Get (and clear) the dirty memory log for a memory slot.
*/
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
{
struct page *page[1];
int npages;
struct kvm_memory_slot *memslot;
int r;
unsigned long n;
might_sleep();
mutex_lock(&kvm->slots_lock);
npages = get_user_pages_fast(addr, 1, 1, page);
r = -EINVAL;
if (log->slot >= KVM_MEMORY_SLOTS)
goto out;
if (unlikely(npages != 1))
return 0;
memslot = id_to_memslot(kvm->memslots, log->slot);
r = -ENOENT;
if (!memslot->dirty_bitmap)
goto out;
return page[0];
n = kvm_dirty_bitmap_bytes(memslot);
memset(memslot->dirty_bitmap, 0, n);
r = kvmppc_hv_get_dirty_log(kvm, memslot);
if (r)
goto out;
r = -EFAULT;
if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
goto out;
r = 0;
out:
mutex_unlock(&kvm->slots_lock);
return r;
}
static unsigned long slb_pgsize_encoding(unsigned long psize)
{
unsigned long senc = 0;
if (psize > 0x1000) {
senc = SLB_VSID_L;
if (psize == 0x10000)
senc |= SLB_VSID_LP_01;
}
return senc;
}
int kvmppc_core_prepare_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem)
{
unsigned long psize, porder;
unsigned long i, npages, totalpages;
unsigned long pg_ix;
struct kvmppc_pginfo *pginfo;
unsigned long hva;
struct kvmppc_rma_info *ri = NULL;
unsigned long npages;
unsigned long *phys;
/* Allocate a slot_phys array */
phys = kvm->arch.slot_phys[mem->slot];
if (!kvm->arch.using_mmu_notifiers && !phys) {
npages = mem->memory_size >> PAGE_SHIFT;
phys = vzalloc(npages * sizeof(unsigned long));
if (!phys)
return -ENOMEM;
kvm->arch.slot_phys[mem->slot] = phys;
kvm->arch.slot_npages[mem->slot] = npages;
}
return 0;
}
static void unpin_slot(struct kvm *kvm, int slot_id)
{
unsigned long *physp;
unsigned long j, npages, pfn;
struct page *page;
/* For now, only allow 16MB pages */
porder = LARGE_PAGE_ORDER;
psize = 1ul << porder;
if ((mem->memory_size & (psize - 1)) ||
(mem->guest_phys_addr & (psize - 1))) {
pr_err("bad memory_size=%llx @ %llx\n",
mem->memory_size, mem->guest_phys_addr);
return -EINVAL;
physp = kvm->arch.slot_phys[slot_id];
npages = kvm->arch.slot_npages[slot_id];
if (physp) {
spin_lock(&kvm->arch.slot_phys_lock);
for (j = 0; j < npages; j++) {
if (!(physp[j] & KVMPPC_GOT_PAGE))
continue;
pfn = physp[j] >> PAGE_SHIFT;
page = pfn_to_page(pfn);
if (PageHuge(page))
page = compound_head(page);
SetPageDirty(page);
put_page(page);
}
kvm->arch.slot_phys[slot_id] = NULL;
spin_unlock(&kvm->arch.slot_phys_lock);
vfree(physp);
}
}
npages = mem->memory_size >> porder;
totalpages = (mem->guest_phys_addr + mem->memory_size) >> porder;
void kvmppc_core_commit_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem)
{
}
/* More memory than we have space to track? */
if (totalpages > (1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER)))
return -EINVAL;
static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu)
{
int err = 0;
struct kvm *kvm = vcpu->kvm;
struct kvmppc_linear_info *ri = NULL;
unsigned long hva;
struct kvm_memory_slot *memslot;
struct vm_area_struct *vma;
unsigned long lpcr, senc;
unsigned long psize, porder;
unsigned long rma_size;
unsigned long rmls;
unsigned long *physp;
unsigned long i, npages;
/* Do we already have an RMA registered? */
if (mem->guest_phys_addr == 0 && kvm->arch.rma)
return -EINVAL;
mutex_lock(&kvm->lock);
if (kvm->arch.rma_setup_done)
goto out; /* another vcpu beat us to it */
if (totalpages > kvm->arch.ram_npages)
kvm->arch.ram_npages = totalpages;
/* Look up the memslot for guest physical address 0 */
memslot = gfn_to_memslot(kvm, 0);
/* We must have some memory at 0 by now */
err = -EINVAL;
if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
goto out;
/* Look up the VMA for the start of this memory slot */
hva = memslot->userspace_addr;
down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, hva);
if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO))
goto up_out;
psize = vma_kernel_pagesize(vma);
porder = __ilog2(psize);
/* Is this one of our preallocated RMAs? */
if (mem->guest_phys_addr == 0) {
struct vm_area_struct *vma;
if (vma->vm_file && vma->vm_file->f_op == &kvm_rma_fops &&
hva == vma->vm_start)
ri = vma->vm_file->private_data;
down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, mem->userspace_addr);
if (vma && vma->vm_file &&
vma->vm_file->f_op == &kvm_rma_fops &&
mem->userspace_addr == vma->vm_start)
ri = vma->vm_file->private_data;
up_read(&current->mm->mmap_sem);
if (!ri && cpu_has_feature(CPU_FTR_ARCH_201)) {
pr_err("CPU requires an RMO\n");
return -EINVAL;
up_read(&current->mm->mmap_sem);
if (!ri) {
/* On POWER7, use VRMA; on PPC970, give up */
err = -EPERM;
if (cpu_has_feature(CPU_FTR_ARCH_201)) {
pr_err("KVM: CPU requires an RMO\n");
goto out;
}
}
if (ri) {
unsigned long rma_size;
unsigned long lpcr;
long rmls;
/* We can handle 4k, 64k or 16M pages in the VRMA */
err = -EINVAL;
if (!(psize == 0x1000 || psize == 0x10000 ||
psize == 0x1000000))
goto out;
rma_size = ri->npages << PAGE_SHIFT;
if (rma_size > mem->memory_size)
rma_size = mem->memory_size;
/* Update VRMASD field in the LPCR */
senc = slb_pgsize_encoding(psize);
kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T |
(VRMA_VSID << SLB_VSID_SHIFT_1T);
lpcr = kvm->arch.lpcr & ~LPCR_VRMASD;
lpcr |= senc << (LPCR_VRMASD_SH - 4);
kvm->arch.lpcr = lpcr;
/* Create HPTEs in the hash page table for the VRMA */
kvmppc_map_vrma(vcpu, memslot, porder);
} else {
/* Set up to use an RMO region */
rma_size = ri->npages;
if (rma_size > memslot->npages)
rma_size = memslot->npages;
rma_size <<= PAGE_SHIFT;
rmls = lpcr_rmls(rma_size);
err = -EINVAL;
if (rmls < 0) {
pr_err("Can't use RMA of 0x%lx bytes\n", rma_size);
return -EINVAL;
pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size);
goto out;
}
atomic_inc(&ri->use_count);
kvm->arch.rma = ri;
kvm->arch.n_rma_pages = rma_size >> porder;
/* Update LPCR and RMOR */
lpcr = kvm->arch.lpcr;
@ -1155,53 +1309,35 @@ int kvmppc_core_prepare_memory_region(struct kvm *kvm,
kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
}
kvm->arch.lpcr = lpcr;
pr_info("Using RMO at %lx size %lx (LPCR = %lx)\n",
pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n",
ri->base_pfn << PAGE_SHIFT, rma_size, lpcr);
/* Initialize phys addrs of pages in RMO */
npages = ri->npages;
porder = __ilog2(npages);
physp = kvm->arch.slot_phys[memslot->id];
spin_lock(&kvm->arch.slot_phys_lock);
for (i = 0; i < npages; ++i)
physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + porder;
spin_unlock(&kvm->arch.slot_phys_lock);
}
pg_ix = mem->guest_phys_addr >> porder;
pginfo = kvm->arch.ram_pginfo + pg_ix;
for (i = 0; i < npages; ++i, ++pg_ix) {
if (ri && pg_ix < kvm->arch.n_rma_pages) {
pginfo[i].pfn = ri->base_pfn +
(pg_ix << (porder - PAGE_SHIFT));
continue;
}
hva = mem->userspace_addr + (i << porder);
page = hva_to_page(hva);
if (!page) {
pr_err("oops, no pfn for hva %lx\n", hva);
goto err;
}
/* Check it's a 16MB page */
if (!PageHead(page) ||
compound_order(page) != (LARGE_PAGE_ORDER - PAGE_SHIFT)) {
pr_err("page at %lx isn't 16MB (o=%d)\n",
hva, compound_order(page));
goto err;
}
pginfo[i].pfn = page_to_pfn(page);
}
/* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */
smp_wmb();
kvm->arch.rma_setup_done = 1;
err = 0;
out:
mutex_unlock(&kvm->lock);
return err;
return 0;
err:
return -EINVAL;
}
void kvmppc_core_commit_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem)
{
if (mem->guest_phys_addr == 0 && mem->memory_size != 0 &&
!kvm->arch.rma)
kvmppc_map_vrma(kvm, mem);
up_out:
up_read(&current->mm->mmap_sem);
goto out;
}
int kvmppc_core_init_vm(struct kvm *kvm)
{
long r;
unsigned long npages = 1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER);
long err = -ENOMEM;
unsigned long lpcr;
/* Allocate hashed page table */
@ -1211,19 +1347,7 @@ int kvmppc_core_init_vm(struct kvm *kvm)
INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
kvm->arch.ram_pginfo = kzalloc(npages * sizeof(struct kvmppc_pginfo),
GFP_KERNEL);
if (!kvm->arch.ram_pginfo) {
pr_err("kvmppc_core_init_vm: couldn't alloc %lu bytes\n",
npages * sizeof(struct kvmppc_pginfo));
goto out_free;
}
kvm->arch.ram_npages = 0;
kvm->arch.ram_psize = 1ul << LARGE_PAGE_ORDER;
kvm->arch.ram_porder = LARGE_PAGE_ORDER;
kvm->arch.rma = NULL;
kvm->arch.n_rma_pages = 0;
kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
@ -1241,30 +1365,25 @@ int kvmppc_core_init_vm(struct kvm *kvm)
kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
lpcr &= LPCR_PECE | LPCR_LPES;
lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
LPCR_VPM0 | LPCR_VRMA_L;
LPCR_VPM0 | LPCR_VPM1;
kvm->arch.vrma_slb_v = SLB_VSID_B_1T |
(VRMA_VSID << SLB_VSID_SHIFT_1T);
}
kvm->arch.lpcr = lpcr;
kvm->arch.using_mmu_notifiers = !!cpu_has_feature(CPU_FTR_ARCH_206);
spin_lock_init(&kvm->arch.slot_phys_lock);
return 0;
out_free:
kvmppc_free_hpt(kvm);
return err;
}
void kvmppc_core_destroy_vm(struct kvm *kvm)
{
struct kvmppc_pginfo *pginfo;
unsigned long i;
if (kvm->arch.ram_pginfo) {
pginfo = kvm->arch.ram_pginfo;
kvm->arch.ram_pginfo = NULL;
for (i = kvm->arch.n_rma_pages; i < kvm->arch.ram_npages; ++i)
if (pginfo[i].pfn)
put_page(pfn_to_page(pginfo[i].pfn));
kfree(pginfo);
}
if (!kvm->arch.using_mmu_notifiers)
for (i = 0; i < KVM_MEM_SLOTS_NUM; i++)
unpin_slot(kvm, i);
if (kvm->arch.rma) {
kvm_release_rma(kvm->arch.rma);
kvm->arch.rma = NULL;

227
arch/powerpc/kvm/book3s_hv_builtin.c
View File

@ -18,6 +18,15 @@
#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s.h>
#define KVM_LINEAR_RMA 0
#define KVM_LINEAR_HPT 1
static void __init kvm_linear_init_one(ulong size, int count, int type);
static struct kvmppc_linear_info *kvm_alloc_linear(int type);
static void kvm_release_linear(struct kvmppc_linear_info *ri);
/*************** RMA *************/
/*
* This maintains a list of RMAs (real mode areas) for KVM guests to use.
* Each RMA has to be physically contiguous and of a size that the
@ -29,32 +38,6 @@
static unsigned long kvm_rma_size = 64 << 20; /* 64MB */
static unsigned long kvm_rma_count;
static int __init early_parse_rma_size(char *p)
{
if (!p)
return 1;
kvm_rma_size = memparse(p, &p);
return 0;
}
early_param("kvm_rma_size", early_parse_rma_size);
static int __init early_parse_rma_count(char *p)
{
if (!p)
return 1;
kvm_rma_count = simple_strtoul(p, NULL, 0);
return 0;
}
early_param("kvm_rma_count", early_parse_rma_count);
static struct kvmppc_rma_info *rma_info;
static LIST_HEAD(free_rmas);
static DEFINE_SPINLOCK(rma_lock);
/* Work out RMLS (real mode limit selector) field value for a given RMA size.
Assumes POWER7 or PPC970. */
static inline int lpcr_rmls(unsigned long rma_size)
@ -81,18 +64,153 @@ static inline int lpcr_rmls(unsigned long rma_size)
}
}
static int __init early_parse_rma_size(char *p)
{
if (!p)
return 1;
kvm_rma_size = memparse(p, &p);
return 0;
}
early_param("kvm_rma_size", early_parse_rma_size);
static int __init early_parse_rma_count(char *p)
{
if (!p)
return 1;
kvm_rma_count = simple_strtoul(p, NULL, 0);
return 0;
}
early_param("kvm_rma_count", early_parse_rma_count);
struct kvmppc_linear_info *kvm_alloc_rma(void)
{
return kvm_alloc_linear(KVM_LINEAR_RMA);
}
EXPORT_SYMBOL_GPL(kvm_alloc_rma);
void kvm_release_rma(struct kvmppc_linear_info *ri)
{
kvm_release_linear(ri);
}
EXPORT_SYMBOL_GPL(kvm_release_rma);
/*************** HPT *************/
/*
* Called at boot time while the bootmem allocator is active,
* to allocate contiguous physical memory for the real memory
* areas for guests.
* This maintains a list of big linear HPT tables that contain the GVA->HPA
* memory mappings. If we don't reserve those early on, we might not be able
* to get a big (usually 16MB) linear memory region from the kernel anymore.
*/
void __init kvm_rma_init(void)
static unsigned long kvm_hpt_count;
static int __init early_parse_hpt_count(char *p)
{
if (!p)
return 1;
kvm_hpt_count = simple_strtoul(p, NULL, 0);
return 0;
}
early_param("kvm_hpt_count", early_parse_hpt_count);
struct kvmppc_linear_info *kvm_alloc_hpt(void)
{
return kvm_alloc_linear(KVM_LINEAR_HPT);
}
EXPORT_SYMBOL_GPL(kvm_alloc_hpt);
void kvm_release_hpt(struct kvmppc_linear_info *li)
{
kvm_release_linear(li);
}
EXPORT_SYMBOL_GPL(kvm_release_hpt);
/*************** generic *************/
static LIST_HEAD(free_linears);
static DEFINE_SPINLOCK(linear_lock);
static void __init kvm_linear_init_one(ulong size, int count, int type)
{
unsigned long i;
unsigned long j, npages;
void *rma;
void *linear;
struct page *pg;
const char *typestr;
struct kvmppc_linear_info *linear_info;
if (!count)
return;
typestr = (type == KVM_LINEAR_RMA) ? "RMA" : "HPT";
npages = size >> PAGE_SHIFT;
linear_info = alloc_bootmem(count * sizeof(struct kvmppc_linear_info));
for (i = 0; i < count; ++i) {
linear = alloc_bootmem_align(size, size);
pr_info("Allocated KVM %s at %p (%ld MB)\n", typestr, linear,
size >> 20);
linear_info[i].base_virt = linear;
linear_info[i].base_pfn = __pa(linear) >> PAGE_SHIFT;
linear_info[i].npages = npages;
linear_info[i].type = type;
list_add_tail(&linear_info[i].list, &free_linears);
atomic_set(&linear_info[i].use_count, 0);
pg = pfn_to_page(linear_info[i].base_pfn);
for (j = 0; j < npages; ++j) {
atomic_inc(&pg->_count);
++pg;
}
}
}
static struct kvmppc_linear_info *kvm_alloc_linear(int type)
{
struct kvmppc_linear_info *ri;
ri = NULL;
spin_lock(&linear_lock);
list_for_each_entry(ri, &free_linears, list) {
if (ri->type != type)
continue;
list_del(&ri->list);
atomic_inc(&ri->use_count);
break;
}
spin_unlock(&linear_lock);
memset(ri->base_virt, 0, ri->npages << PAGE_SHIFT);
return ri;
}
static void kvm_release_linear(struct kvmppc_linear_info *ri)
{
if (atomic_dec_and_test(&ri->use_count)) {
spin_lock(&linear_lock);
list_add_tail(&ri->list, &free_linears);
spin_unlock(&linear_lock);
}
}
/*
* Called at boot time while the bootmem allocator is active,
* to allocate contiguous physical memory for the hash page
* tables for guests.
*/
void __init kvm_linear_init(void)
{
/* HPT */
kvm_linear_init_one(1 << HPT_ORDER, kvm_hpt_count, KVM_LINEAR_HPT);
/* RMA */
/* Only do this on PPC970 in HV mode */
if (!cpu_has_feature(CPU_FTR_HVMODE) ||
!cpu_has_feature(CPU_FTR_ARCH_201))
@ -107,50 +225,5 @@ void __init kvm_rma_init(void)
return;
}
npages = kvm_rma_size >> PAGE_SHIFT;
rma_info = alloc_bootmem(kvm_rma_count * sizeof(struct kvmppc_rma_info));
for (i = 0; i < kvm_rma_count; ++i) {
rma = alloc_bootmem_align(kvm_rma_size, kvm_rma_size);
pr_info("Allocated KVM RMA at %p (%ld MB)\n", rma,
kvm_rma_size >> 20);
rma_info[i].base_virt = rma;
rma_info[i].base_pfn = __pa(rma) >> PAGE_SHIFT;
rma_info[i].npages = npages;
list_add_tail(&rma_info[i].list, &free_rmas);
atomic_set(&rma_info[i].use_count, 0);
pg = pfn_to_page(rma_info[i].base_pfn);
for (j = 0; j < npages; ++j) {
atomic_inc(&pg->_count);
++pg;
}
}
kvm_linear_init_one(kvm_rma_size, kvm_rma_count, KVM_LINEAR_RMA);
}
struct kvmppc_rma_info *kvm_alloc_rma(void)
{
struct kvmppc_rma_info *ri;
ri = NULL;
spin_lock(&rma_lock);
if (!list_empty(&free_rmas)) {
ri = list_first_entry(&free_rmas, struct kvmppc_rma_info, list);
list_del(&ri->list);
atomic_inc(&ri->use_count);
}
spin_unlock(&rma_lock);
return ri;
}
EXPORT_SYMBOL_GPL(kvm_alloc_rma);
void kvm_release_rma(struct kvmppc_rma_info *ri)
{
if (atomic_dec_and_test(&ri->use_count)) {
spin_lock(&rma_lock);
list_add_tail(&ri->list, &free_rmas);
spin_unlock(&rma_lock);
}
}
EXPORT_SYMBOL_GPL(kvm_release_rma);

845
arch/powerpc/kvm/book3s_hv_rm_mmu.c
View File

@ -11,6 +11,7 @@
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <linux/hugetlb.h>
#include <linux/module.h>
#include <asm/tlbflush.h>
#include <asm/kvm_ppc.h>
@ -20,95 +21,307 @@
#include <asm/synch.h>
#include <asm/ppc-opcode.h>
/* For now use fixed-size 16MB page table */
#define HPT_ORDER 24
#define HPT_NPTEG (1ul << (HPT_ORDER - 7)) /* 128B per pteg */
#define HPT_HASH_MASK (HPT_NPTEG - 1)
#define HPTE_V_HVLOCK 0x40UL
static inline long lock_hpte(unsigned long *hpte, unsigned long bits)
/* Translate address of a vmalloc'd thing to a linear map address */
static void *real_vmalloc_addr(void *x)
{
unsigned long tmp, old;
unsigned long addr = (unsigned long) x;
pte_t *p;
asm volatile(" ldarx %0,0,%2\n"
" and. %1,%0,%3\n"
" bne 2f\n"
" ori %0,%0,%4\n"
" stdcx. %0,0,%2\n"
" beq+ 2f\n"
" li %1,%3\n"
"2: isync"
: "=&r" (tmp), "=&r" (old)
: "r" (hpte), "r" (bits), "i" (HPTE_V_HVLOCK)
: "cc", "memory");
return old == 0;
p = find_linux_pte(swapper_pg_dir, addr);
if (!p || !pte_present(*p))
return NULL;
/* assume we don't have huge pages in vmalloc space... */
addr = (pte_pfn(*p) << PAGE_SHIFT) | (addr & ~PAGE_MASK);
return __va(addr);
}
/*
* Add this HPTE into the chain for the real page.
* Must be called with the chain locked; it unlocks the chain.
*/
void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
unsigned long *rmap, long pte_index, int realmode)
{
struct revmap_entry *head, *tail;
unsigned long i;
if (*rmap & KVMPPC_RMAP_PRESENT) {
i = *rmap & KVMPPC_RMAP_INDEX;
head = &kvm->arch.revmap[i];
if (realmode)
head = real_vmalloc_addr(head);
tail = &kvm->arch.revmap[head->back];
if (realmode)
tail = real_vmalloc_addr(tail);
rev->forw = i;
rev->back = head->back;
tail->forw = pte_index;
head->back = pte_index;
} else {
rev->forw = rev->back = pte_index;
i = pte_index;
}
smp_wmb();
*rmap = i | KVMPPC_RMAP_REFERENCED | KVMPPC_RMAP_PRESENT; /* unlock */
}
EXPORT_SYMBOL_GPL(kvmppc_add_revmap_chain);
/* Remove this HPTE from the chain for a real page */
static void remove_revmap_chain(struct kvm *kvm, long pte_index,
struct revmap_entry *rev,
unsigned long hpte_v, unsigned long hpte_r)
{
struct revmap_entry *next, *prev;
unsigned long gfn, ptel, head;
struct kvm_memory_slot *memslot;
unsigned long *rmap;
unsigned long rcbits;
rcbits = hpte_r & (HPTE_R_R | HPTE_R_C);
ptel = rev->guest_rpte |= rcbits;
gfn = hpte_rpn(ptel, hpte_page_size(hpte_v, ptel));
memslot = __gfn_to_memslot(kvm_memslots(kvm), gfn);
if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
return;
rmap = real_vmalloc_addr(&memslot->rmap[gfn - memslot->base_gfn]);
lock_rmap(rmap);
head = *rmap & KVMPPC_RMAP_INDEX;
next = real_vmalloc_addr(&kvm->arch.revmap[rev->forw]);
prev = real_vmalloc_addr(&kvm->arch.revmap[rev->back]);
next->back = rev->back;
prev->forw = rev->forw;
if (head == pte_index) {
head = rev->forw;
if (head == pte_index)
*rmap &= ~(KVMPPC_RMAP_PRESENT | KVMPPC_RMAP_INDEX);
else
*rmap = (*rmap & ~KVMPPC_RMAP_INDEX) | head;
}
*rmap |= rcbits << KVMPPC_RMAP_RC_SHIFT;
unlock_rmap(rmap);
}
static pte_t lookup_linux_pte(struct kvm_vcpu *vcpu, unsigned long hva,
int writing, unsigned long *pte_sizep)
{
pte_t *ptep;
unsigned long ps = *pte_sizep;
unsigned int shift;
ptep = find_linux_pte_or_hugepte(vcpu->arch.pgdir, hva, &shift);
if (!ptep)
return __pte(0);
if (shift)
*pte_sizep = 1ul << shift;
else
*pte_sizep = PAGE_SIZE;
if (ps > *pte_sizep)
return __pte(0);
if (!pte_present(*ptep))
return __pte(0);
return kvmppc_read_update_linux_pte(ptep, writing);
}
static inline void unlock_hpte(unsigned long *hpte, unsigned long hpte_v)
{
asm volatile(PPC_RELEASE_BARRIER "" : : : "memory");
hpte[0] = hpte_v;
}
long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
long pte_index, unsigned long pteh, unsigned long ptel)
{
unsigned long porder;
struct kvm *kvm = vcpu->kvm;
unsigned long i, lpn, pa;
unsigned long i, pa, gpa, gfn, psize;
unsigned long slot_fn, hva;
unsigned long *hpte;
struct revmap_entry *rev;
unsigned long g_ptel = ptel;
struct kvm_memory_slot *memslot;
unsigned long *physp, pte_size;
unsigned long is_io;
unsigned long *rmap;
pte_t pte;
unsigned int writing;
unsigned long mmu_seq;
unsigned long rcbits;
bool realmode = vcpu->arch.vcore->vcore_state == VCORE_RUNNING;
/* only handle 4k, 64k and 16M pages for now */
porder = 12;
if (pteh & HPTE_V_LARGE) {
if (cpu_has_feature(CPU_FTR_ARCH_206) &&
(ptel & 0xf000) == 0x1000) {
/* 64k page */
porder = 16;
} else if ((ptel & 0xff000) == 0) {
/* 16M page */
porder = 24;
/* lowest AVA bit must be 0 for 16M pages */
if (pteh & 0x80)
return H_PARAMETER;
} else
psize = hpte_page_size(pteh, ptel);
if (!psize)
return H_PARAMETER;
writing = hpte_is_writable(ptel);
pteh &= ~(HPTE_V_HVLOCK | HPTE_V_ABSENT | HPTE_V_VALID);
/* used later to detect if we might have been invalidated */
mmu_seq = kvm->mmu_notifier_seq;
smp_rmb();
/* Find the memslot (if any) for this address */
gpa = (ptel & HPTE_R_RPN) & ~(psize - 1);
gfn = gpa >> PAGE_SHIFT;
memslot = __gfn_to_memslot(kvm_memslots(kvm), gfn);
pa = 0;
is_io = ~0ul;
rmap = NULL;
if (!(memslot && !(memslot->flags & KVM_MEMSLOT_INVALID))) {
/* PPC970 can't do emulated MMIO */
if (!cpu_has_feature(CPU_FTR_ARCH_206))
return H_PARAMETER;
/* Emulated MMIO - mark this with key=31 */
pteh |= HPTE_V_ABSENT;
ptel |= HPTE_R_KEY_HI | HPTE_R_KEY_LO;
goto do_insert;
}
lpn = (ptel & HPTE_R_RPN) >> kvm->arch.ram_porder;
if (lpn >= kvm->arch.ram_npages || porder > kvm->arch.ram_porder)
/* Check if the requested page fits entirely in the memslot. */
if (!slot_is_aligned(memslot, psize))
return H_PARAMETER;
pa = kvm->arch.ram_pginfo[lpn].pfn << PAGE_SHIFT;
if (!pa)
slot_fn = gfn - memslot->base_gfn;
rmap = &memslot->rmap[slot_fn];
if (!kvm->arch.using_mmu_notifiers) {
physp = kvm->arch.slot_phys[memslot->id];
if (!physp)
return H_PARAMETER;
physp += slot_fn;
if (realmode)
physp = real_vmalloc_addr(physp);
pa = *physp;
if (!pa)
return H_TOO_HARD;
is_io = pa & (HPTE_R_I | HPTE_R_W);
pte_size = PAGE_SIZE << (pa & KVMPPC_PAGE_ORDER_MASK);
pa &= PAGE_MASK;
} else {
/* Translate to host virtual address */
hva = gfn_to_hva_memslot(memslot, gfn);
/* Look up the Linux PTE for the backing page */
pte_size = psize;
pte = lookup_linux_pte(vcpu, hva, writing, &pte_size);
if (pte_present(pte)) {
if (writing && !pte_write(pte))
/* make the actual HPTE be read-only */
ptel = hpte_make_readonly(ptel);
is_io = hpte_cache_bits(pte_val(pte));
pa = pte_pfn(pte) << PAGE_SHIFT;
}
}
if (pte_size < psize)
return H_PARAMETER;
/* Check WIMG */
if ((ptel & HPTE_R_WIMG) != HPTE_R_M &&
(ptel & HPTE_R_WIMG) != (HPTE_R_W | HPTE_R_I | HPTE_R_M))
return H_PARAMETER;
pteh &= ~0x60UL;
ptel &= ~(HPTE_R_PP0 - kvm->arch.ram_psize);
if (pa && pte_size > psize)
pa |= gpa & (pte_size - 1);
ptel &= ~(HPTE_R_PP0 - psize);
ptel |= pa;
if (pte_index >= (HPT_NPTEG << 3))
if (pa)
pteh |= HPTE_V_VALID;
else
pteh |= HPTE_V_ABSENT;
/* Check WIMG */
if (is_io != ~0ul && !hpte_cache_flags_ok(ptel, is_io)) {
if (is_io)
return H_PARAMETER;
/*
* Allow guest to map emulated device memory as
* uncacheable, but actually make it cacheable.
*/
ptel &= ~(HPTE_R_W|HPTE_R_I|HPTE_R_G);
ptel |= HPTE_R_M;
}
/* Find and lock the HPTEG slot to use */
do_insert:
if (pte_index >= HPT_NPTE)
return H_PARAMETER;
if (likely((flags & H_EXACT) == 0)) {
pte_index &= ~7UL;
hpte = (unsigned long *)(kvm->arch.hpt_virt + (pte_index << 4));
for (i = 0; ; ++i) {
if (i == 8)
return H_PTEG_FULL;
for (i = 0; i < 8; ++i) {
if ((*hpte & HPTE_V_VALID) == 0 &&
lock_hpte(hpte, HPTE_V_HVLOCK | HPTE_V_VALID))
try_lock_hpte(hpte, HPTE_V_HVLOCK | HPTE_V_VALID |
HPTE_V_ABSENT))
break;
hpte += 2;
}
if (i == 8) {
/*
* Since try_lock_hpte doesn't retry (not even stdcx.
* failures), it could be that there is a free slot
* but we transiently failed to lock it. Try again,
* actually locking each slot and checking it.
*/
hpte -= 16;
for (i = 0; i < 8; ++i) {
while (!try_lock_hpte(hpte, HPTE_V_HVLOCK))
cpu_relax();
if (!(*hpte & (HPTE_V_VALID | HPTE_V_ABSENT)))
break;
*hpte &= ~HPTE_V_HVLOCK;
hpte += 2;
}
if (i == 8)
return H_PTEG_FULL;
}
pte_index += i;
} else {
i = 0;
hpte = (unsigned long *)(kvm->arch.hpt_virt + (pte_index << 4));
if (!lock_hpte(hpte, HPTE_V_HVLOCK | HPTE_V_VALID))
return H_PTEG_FULL;
if (!try_lock_hpte(hpte, HPTE_V_HVLOCK | HPTE_V_VALID |
HPTE_V_ABSENT)) {
/* Lock the slot and check again */
while (!try_lock_hpte(hpte, HPTE_V_HVLOCK))
cpu_relax();
if (*hpte & (HPTE_V_VALID | HPTE_V_ABSENT)) {
*hpte &= ~HPTE_V_HVLOCK;
return H_PTEG_FULL;
}
}
}
/* Save away the guest's idea of the second HPTE dword */
rev = &kvm->arch.revmap[pte_index];
if (realmode)
rev = real_vmalloc_addr(rev);
if (rev)
rev->guest_rpte = g_ptel;
/* Link HPTE into reverse-map chain */
if (pteh & HPTE_V_VALID) {
if (realmode)
rmap = real_vmalloc_addr(rmap);
lock_rmap(rmap);
/* Check for pending invalidations under the rmap chain lock */
if (kvm->arch.using_mmu_notifiers &&
mmu_notifier_retry(vcpu, mmu_seq)) {
/* inval in progress, write a non-present HPTE */
pteh |= HPTE_V_ABSENT;
pteh &= ~HPTE_V_VALID;
unlock_rmap(rmap);
} else {
kvmppc_add_revmap_chain(kvm, rev, rmap, pte_index,
realmode);
/* Only set R/C in real HPTE if already set in *rmap */
rcbits = *rmap >> KVMPPC_RMAP_RC_SHIFT;
ptel &= rcbits | ~(HPTE_R_R | HPTE_R_C);
}
}
hpte[1] = ptel;
/* Write the first HPTE dword, unlocking the HPTE and making it valid */
eieio();
hpte[0] = pteh;
asm volatile("ptesync" : : : "memory");
atomic_inc(&kvm->arch.ram_pginfo[lpn].refcnt);
vcpu->arch.gpr[4] = pte_index + i;
vcpu->arch.gpr[4] = pte_index;
return H_SUCCESS;
}
EXPORT_SYMBOL_GPL(kvmppc_h_enter);
#define LOCK_TOKEN (*(u32 *)(&get_paca()->lock_token))
@ -137,37 +350,46 @@ long kvmppc_h_remove(struct kvm_vcpu *vcpu, unsigned long flags,
struct kvm *kvm = vcpu->kvm;
unsigned long *hpte;
unsigned long v, r, rb;
struct revmap_entry *rev;
if (pte_index >= (HPT_NPTEG << 3))
if (pte_index >= HPT_NPTE)
return H_PARAMETER;
hpte = (unsigned long *)(kvm->arch.hpt_virt + (pte_index << 4));
while (!lock_hpte(hpte, HPTE_V_HVLOCK))
while (!try_lock_hpte(hpte, HPTE_V_HVLOCK))
cpu_relax();
if ((hpte[0] & HPTE_V_VALID) == 0 ||
if ((hpte[0] & (HPTE_V_ABSENT | HPTE_V_VALID)) == 0 ||
((flags & H_AVPN) && (hpte[0] & ~0x7fUL) != avpn) ||
((flags & H_ANDCOND) && (hpte[0] & avpn) != 0)) {
hpte[0] &= ~HPTE_V_HVLOCK;
return H_NOT_FOUND;
}
if (atomic_read(&kvm->online_vcpus) == 1)
flags |= H_LOCAL;
vcpu->arch.gpr[4] = v = hpte[0] & ~HPTE_V_HVLOCK;
vcpu->arch.gpr[5] = r = hpte[1];
rb = compute_tlbie_rb(v, r, pte_index);
hpte[0] = 0;
if (!(flags & H_LOCAL)) {
while(!try_lock_tlbie(&kvm->arch.tlbie_lock))
cpu_relax();
asm volatile("ptesync" : : : "memory");
asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
: : "r" (rb), "r" (kvm->arch.lpid));
asm volatile("ptesync" : : : "memory");
kvm->arch.tlbie_lock = 0;
} else {
asm volatile("ptesync" : : : "memory");
asm volatile("tlbiel %0" : : "r" (rb));
asm volatile("ptesync" : : : "memory");
rev = real_vmalloc_addr(&kvm->arch.revmap[pte_index]);
v = hpte[0] & ~HPTE_V_HVLOCK;
if (v & HPTE_V_VALID) {
hpte[0] &= ~HPTE_V_VALID;
rb = compute_tlbie_rb(v, hpte[1], pte_index);
if (!(flags & H_LOCAL) && atomic_read(&kvm->online_vcpus) > 1) {
while (!try_lock_tlbie(&kvm->arch.tlbie_lock))
cpu_relax();
asm volatile("ptesync" : : : "memory");
asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
: : "r" (rb), "r" (kvm->arch.lpid));
asm volatile("ptesync" : : : "memory");
kvm->arch.tlbie_lock = 0;
} else {
asm volatile("ptesync" : : : "memory");
asm volatile("tlbiel %0" : : "r" (rb));
asm volatile("ptesync" : : : "memory");
}
/* Read PTE low word after tlbie to get final R/C values */
remove_revmap_chain(kvm, pte_index, rev, v, hpte[1]);
}
r = rev->guest_rpte;
unlock_hpte(hpte, 0);
vcpu->arch.gpr[4] = v;
vcpu->arch.gpr[5] = r;
return H_SUCCESS;
}
@ -175,78 +397,117 @@ long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu)
{
struct kvm *kvm = vcpu->kvm;
unsigned long *args = &vcpu->arch.gpr[4];
unsigned long *hp, tlbrb[4];
long int i, found;
long int n_inval = 0;
unsigned long flags, req, pte_index;
unsigned long *hp, *hptes[4], tlbrb[4];
long int i, j, k, n, found, indexes[4];
unsigned long flags, req, pte_index, rcbits;
long int local = 0;
long int ret = H_SUCCESS;
struct revmap_entry *rev, *revs[4];
if (atomic_read(&kvm->online_vcpus) == 1)
local = 1;
for (i = 0; i < 4; ++i) {
pte_index = args[i * 2];
flags = pte_index >> 56;
pte_index &= ((1ul << 56) - 1);
req = flags >> 6;
flags &= 3;
if (req == 3)
break;
if (req != 1 || flags == 3 ||
pte_index >= (HPT_NPTEG << 3)) {
/* parameter error */
args[i * 2] = ((0xa0 | flags) << 56) + pte_index;
ret = H_PARAMETER;
break;
}
hp = (unsigned long *)(kvm->arch.hpt_virt + (pte_index << 4));
while (!lock_hpte(hp, HPTE_V_HVLOCK))
cpu_relax();
found = 0;
if (hp[0] & HPTE_V_VALID) {
switch (flags & 3) {
case 0: /* absolute */
found = 1;
break;
case 1: /* andcond */
if (!(hp[0] & args[i * 2 + 1]))
found = 1;
break;
case 2: /* AVPN */
if ((hp[0] & ~0x7fUL) == args[i * 2 + 1])
found = 1;
for (i = 0; i < 4 && ret == H_SUCCESS; ) {
n = 0;
for (; i < 4; ++i) {
j = i * 2;
pte_index = args[j];
flags = pte_index >> 56;
pte_index &= ((1ul << 56) - 1);
req = flags >> 6;
flags &= 3;
if (req == 3) { /* no more requests */
i = 4;
break;
}
}
if (!found) {
hp[0] &= ~HPTE_V_HVLOCK;
args[i * 2] = ((0x90 | flags) << 56) + pte_index;
continue;
}
/* insert R and C bits from PTE */
flags |= (hp[1] >> 5) & 0x0c;
args[i * 2] = ((0x80 | flags) << 56) + pte_index;
tlbrb[n_inval++] = compute_tlbie_rb(hp[0], hp[1], pte_index);
hp[0] = 0;
}
if (n_inval == 0)
return ret;
if (req != 1 || flags == 3 || pte_index >= HPT_NPTE) {
/* parameter error */
args[j] = ((0xa0 | flags) << 56) + pte_index;
ret = H_PARAMETER;
break;
}
hp = (unsigned long *)
(kvm->arch.hpt_virt + (pte_index << 4));
/* to avoid deadlock, don't spin except for first */
if (!try_lock_hpte(hp, HPTE_V_HVLOCK)) {
if (n)
break;
while (!try_lock_hpte(hp, HPTE_V_HVLOCK))
cpu_relax();
}
found = 0;
if (hp[0] & (HPTE_V_ABSENT | HPTE_V_VALID)) {
switch (flags & 3) {
case 0: /* absolute */
found = 1;
break;
case 1: /* andcond */
if (!(hp[0] & args[j + 1]))
found = 1;
break;
case 2: /* AVPN */
if ((hp[0] & ~0x7fUL) == args[j + 1])
found = 1;
break;
}
}
if (!found) {
hp[0] &= ~HPTE_V_HVLOCK;
args[j] = ((0x90 | flags) << 56) + pte_index;
continue;
}
if (!local) {
while(!try_lock_tlbie(&kvm->arch.tlbie_lock))
cpu_relax();
asm volatile("ptesync" : : : "memory");
for (i = 0; i < n_inval; ++i)
asm volatile(PPC_TLBIE(%1,%0)
: : "r" (tlbrb[i]), "r" (kvm->arch.lpid));
asm volatile("eieio; tlbsync; ptesync" : : : "memory");
kvm->arch.tlbie_lock = 0;
} else {
asm volatile("ptesync" : : : "memory");
for (i = 0; i < n_inval; ++i)
asm volatile("tlbiel %0" : : "r" (tlbrb[i]));
asm volatile("ptesync" : : : "memory");
args[j] = ((0x80 | flags) << 56) + pte_index;
rev = real_vmalloc_addr(&kvm->arch.revmap[pte_index]);
if (!(hp[0] & HPTE_V_VALID)) {
/* insert R and C bits from PTE */
rcbits = rev->guest_rpte & (HPTE_R_R|HPTE_R_C);
args[j] |= rcbits << (56 - 5);
continue;
}
hp[0] &= ~HPTE_V_VALID; /* leave it locked */
tlbrb[n] = compute_tlbie_rb(hp[0], hp[1], pte_index);
indexes[n] = j;
hptes[n] = hp;
revs[n] = rev;
++n;
}
if (!n)
break;
/* Now that we've collected a batch, do the tlbies */
if (!local) {
while(!try_lock_tlbie(&kvm->arch.tlbie_lock))
cpu_relax();
asm volatile("ptesync" : : : "memory");
for (k = 0; k < n; ++k)
asm volatile(PPC_TLBIE(%1,%0) : :
"r" (tlbrb[k]),
"r" (kvm->arch.lpid));
asm volatile("eieio; tlbsync; ptesync" : : : "memory");
kvm->arch.tlbie_lock = 0;
} else {
asm volatile("ptesync" : : : "memory");
for (k = 0; k < n; ++k)
asm volatile("tlbiel %0" : : "r" (tlbrb[k]));
asm volatile("ptesync" : : : "memory");
}
/* Read PTE low words after tlbie to get final R/C values */
for (k = 0; k < n; ++k) {
j = indexes[k];
pte_index = args[j] & ((1ul << 56) - 1);
hp = hptes[k];
rev = revs[k];
remove_revmap_chain(kvm, pte_index, rev, hp[0], hp[1]);
rcbits = rev->guest_rpte & (HPTE_R_R|HPTE_R_C);
args[j] |= rcbits << (56 - 5);
hp[0] = 0;
}
}
return ret;
}
@ -256,40 +517,55 @@ long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
{
struct kvm *kvm = vcpu->kvm;
unsigned long *hpte;
unsigned long v, r, rb;
struct revmap_entry *rev;
unsigned long v, r, rb, mask, bits;
if (pte_index >= (HPT_NPTEG << 3))
if (pte_index >= HPT_NPTE)
return H_PARAMETER;
hpte = (unsigned long *)(kvm->arch.hpt_virt + (pte_index << 4));
while (!lock_hpte(hpte, HPTE_V_HVLOCK))
while (!try_lock_hpte(hpte, HPTE_V_HVLOCK))
cpu_relax();
if ((hpte[0] & HPTE_V_VALID) == 0 ||
if ((hpte[0] & (HPTE_V_ABSENT | HPTE_V_VALID)) == 0 ||
((flags & H_AVPN) && (hpte[0] & ~0x7fUL) != avpn)) {
hpte[0] &= ~HPTE_V_HVLOCK;
return H_NOT_FOUND;
}
if (atomic_read(&kvm->online_vcpus) == 1)
flags |= H_LOCAL;
v = hpte[0];
r = hpte[1] & ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N |
HPTE_R_KEY_HI | HPTE_R_KEY_LO);
r |= (flags << 55) & HPTE_R_PP0;
r |= (flags << 48) & HPTE_R_KEY_HI;
r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO);
rb = compute_tlbie_rb(v, r, pte_index);
hpte[0] = v & ~HPTE_V_VALID;
if (!(flags & H_LOCAL)) {
while(!try_lock_tlbie(&kvm->arch.tlbie_lock))
cpu_relax();
asm volatile("ptesync" : : : "memory");
asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
: : "r" (rb), "r" (kvm->arch.lpid));
asm volatile("ptesync" : : : "memory");
kvm->arch.tlbie_lock = 0;
} else {
asm volatile("ptesync" : : : "memory");
asm volatile("tlbiel %0" : : "r" (rb));
asm volatile("ptesync" : : : "memory");
bits = (flags << 55) & HPTE_R_PP0;
bits |= (flags << 48) & HPTE_R_KEY_HI;
bits |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO);
/* Update guest view of 2nd HPTE dword */
mask = HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N |
HPTE_R_KEY_HI | HPTE_R_KEY_LO;
rev = real_vmalloc_addr(&kvm->arch.revmap[pte_index]);
if (rev) {
r = (rev->guest_rpte & ~mask) | bits;
rev->guest_rpte = r;
}
r = (hpte[1] & ~mask) | bits;
/* Update HPTE */
if (v & HPTE_V_VALID) {
rb = compute_tlbie_rb(v, r, pte_index);
hpte[0] = v & ~HPTE_V_VALID;
if (!(flags & H_LOCAL)) {
while(!try_lock_tlbie(&kvm->arch.tlbie_lock))
cpu_relax();
asm volatile("ptesync" : : : "memory");
asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
: : "r" (rb), "r" (kvm->arch.lpid));
asm volatile("ptesync" : : : "memory");
kvm->arch.tlbie_lock = 0;
} else {
asm volatile("ptesync" : : : "memory");
asm volatile("tlbiel %0" : : "r" (rb));
asm volatile("ptesync" : : : "memory");
}
}
hpte[1] = r;
eieio();
@ -298,40 +574,243 @@ long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
return H_SUCCESS;
}
static unsigned long reverse_xlate(struct kvm *kvm, unsigned long realaddr)
{
long int i;
unsigned long offset, rpn;
offset = realaddr & (kvm->arch.ram_psize - 1);
rpn = (realaddr - offset) >> PAGE_SHIFT;
for (i = 0; i < kvm->arch.ram_npages; ++i)
if (rpn == kvm->arch.ram_pginfo[i].pfn)
return (i << PAGE_SHIFT) + offset;
return HPTE_R_RPN; /* all 1s in the RPN field */
}
long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long pte_index)
{
struct kvm *kvm = vcpu->kvm;
unsigned long *hpte, r;
unsigned long *hpte, v, r;
int i, n = 1;
struct revmap_entry *rev = NULL;
if (pte_index >= (HPT_NPTEG << 3))
if (pte_index >= HPT_NPTE)
return H_PARAMETER;
if (flags & H_READ_4) {
pte_index &= ~3;
n = 4;
}
rev = real_vmalloc_addr(&kvm->arch.revmap[pte_index]);
for (i = 0; i < n; ++i, ++pte_index) {
hpte = (unsigned long *)(kvm->arch.hpt_virt + (pte_index << 4));
v = hpte[0] & ~HPTE_V_HVLOCK;
r = hpte[1];
if ((flags & H_R_XLATE) && (hpte[0] & HPTE_V_VALID))
r = reverse_xlate(kvm, r & HPTE_R_RPN) |
(r & ~HPTE_R_RPN);
vcpu->arch.gpr[4 + i * 2] = hpte[0];
if (v & HPTE_V_ABSENT) {
v &= ~HPTE_V_ABSENT;
v |= HPTE_V_VALID;
}
if (v & HPTE_V_VALID)
r = rev[i].guest_rpte | (r & (HPTE_R_R | HPTE_R_C));
vcpu->arch.gpr[4 + i * 2] = v;
vcpu->arch.gpr[5 + i * 2] = r;
}
return H_SUCCESS;
}
void kvmppc_invalidate_hpte(struct kvm *kvm, unsigned long *hptep,
unsigned long pte_index)
{
unsigned long rb;
hptep[0] &= ~HPTE_V_VALID;
rb = compute_tlbie_rb(hptep[0], hptep[1], pte_index);
while (!try_lock_tlbie(&kvm->arch.tlbie_lock))
cpu_relax();
asm volatile("ptesync" : : : "memory");
asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
: : "r" (rb), "r" (kvm->arch.lpid));
asm volatile("ptesync" : : : "memory");
kvm->arch.tlbie_lock = 0;
}
EXPORT_SYMBOL_GPL(kvmppc_invalidate_hpte);
void kvmppc_clear_ref_hpte(struct kvm *kvm, unsigned long *hptep,
unsigned long pte_index)
{
unsigned long rb;
unsigned char rbyte;
rb = compute_tlbie_rb(hptep[0], hptep[1], pte_index);
rbyte = (hptep[1] & ~HPTE_R_R) >> 8;
/* modify only the second-last byte, which contains the ref bit */
*((char *)hptep + 14) = rbyte;
while (!try_lock_tlbie(&kvm->arch.tlbie_lock))
cpu_relax();
asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
: : "r" (rb), "r" (kvm->arch.lpid));
asm volatile("ptesync" : : : "memory");
kvm->arch.tlbie_lock = 0;
}
EXPORT_SYMBOL_GPL(kvmppc_clear_ref_hpte);
static int slb_base_page_shift[4] = {
24, /* 16M */
16, /* 64k */
34, /* 16G */
20, /* 1M, unsupported */
};
long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr, unsigned long slb_v,
unsigned long valid)
{
unsigned int i;
unsigned int pshift;
unsigned long somask;
unsigned long vsid, hash;
unsigned long avpn;
unsigned long *hpte;
unsigned long mask, val;
unsigned long v, r;
/* Get page shift, work out hash and AVPN etc. */
mask = SLB_VSID_B | HPTE_V_AVPN | HPTE_V_SECONDARY;
val = 0;
pshift = 12;
if (slb_v & SLB_VSID_L) {
mask |= HPTE_V_LARGE;
val |= HPTE_V_LARGE;
pshift = slb_base_page_shift[(slb_v & SLB_VSID_LP) >> 4];
}
if (slb_v & SLB_VSID_B_1T) {
somask = (1UL << 40) - 1;
vsid = (slb_v & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T;
vsid ^= vsid << 25;
} else {
somask = (1UL << 28) - 1;
vsid = (slb_v & ~SLB_VSID_B) >> SLB_VSID_SHIFT;
}
hash = (vsid ^ ((eaddr & somask) >> pshift)) & HPT_HASH_MASK;
avpn = slb_v & ~(somask >> 16); /* also includes B */
avpn |= (eaddr & somask) >> 16;
if (pshift >= 24)
avpn &= ~((1UL << (pshift - 16)) - 1);
else
avpn &= ~0x7fUL;
val |= avpn;
for (;;) {
hpte = (unsigned long *)(kvm->arch.hpt_virt + (hash << 7));
for (i = 0; i < 16; i += 2) {
/* Read the PTE racily */
v = hpte[i] & ~HPTE_V_HVLOCK;
/* Check valid/absent, hash, segment size and AVPN */
if (!(v & valid) || (v & mask) != val)
continue;
/* Lock the PTE and read it under the lock */
while (!try_lock_hpte(&hpte[i], HPTE_V_HVLOCK))
cpu_relax();
v = hpte[i] & ~HPTE_V_HVLOCK;
r = hpte[i+1];
/*
* Check the HPTE again, including large page size
* Since we don't currently allow any MPSS (mixed
* page-size segment) page sizes, it is sufficient
* to check against the actual page size.
*/
if ((v & valid) && (v & mask) == val &&
hpte_page_size(v, r) == (1ul << pshift))
/* Return with the HPTE still locked */
return (hash << 3) + (i >> 1);
/* Unlock and move on */
hpte[i] = v;
}
if (val & HPTE_V_SECONDARY)
break;
val |= HPTE_V_SECONDARY;
hash = hash ^ HPT_HASH_MASK;
}
return -1;
}
EXPORT_SYMBOL(kvmppc_hv_find_lock_hpte);
/*
* Called in real mode to check whether an HPTE not found fault
* is due to accessing a paged-out page or an emulated MMIO page,
* or if a protection fault is due to accessing a page that the
* guest wanted read/write access to but which we made read-only.
* Returns a possibly modified status (DSISR) value if not
* (i.e. pass the interrupt to the guest),
* -1 to pass the fault up to host kernel mode code, -2 to do that
* and also load the instruction word (for MMIO emulation),
* or 0 if we should make the guest retry the access.
*/
long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr,
unsigned long slb_v, unsigned int status, bool data)
{
struct kvm *kvm = vcpu->kvm;
long int index;
unsigned long v, r, gr;
unsigned long *hpte;
unsigned long valid;
struct revmap_entry *rev;
unsigned long pp, key;
/* For protection fault, expect to find a valid HPTE */
valid = HPTE_V_VALID;
if (status & DSISR_NOHPTE)
valid |= HPTE_V_ABSENT;
index = kvmppc_hv_find_lock_hpte(kvm, addr, slb_v, valid);
if (index < 0) {
if (status & DSISR_NOHPTE)
return status; /* there really was no HPTE */
return 0; /* for prot fault, HPTE disappeared */
}
hpte = (unsigned long *)(kvm->arch.hpt_virt + (index << 4));
v = hpte[0] & ~HPTE_V_HVLOCK;
r = hpte[1];
rev = real_vmalloc_addr(&kvm->arch.revmap[index]);
gr = rev->guest_rpte;
unlock_hpte(hpte, v);
/* For not found, if the HPTE is valid by now, retry the instruction */
if ((status & DSISR_NOHPTE) && (v & HPTE_V_VALID))
return 0;
/* Check access permissions to the page */
pp = gr & (HPTE_R_PP0 | HPTE_R_PP);
key = (vcpu->arch.shregs.msr & MSR_PR) ? SLB_VSID_KP : SLB_VSID_KS;
status &= ~DSISR_NOHPTE; /* DSISR_NOHPTE == SRR1_ISI_NOPT */
if (!data) {
if (gr & (HPTE_R_N | HPTE_R_G))
return status | SRR1_ISI_N_OR_G;
if (!hpte_read_permission(pp, slb_v & key))
return status | SRR1_ISI_PROT;
} else if (status & DSISR_ISSTORE) {
/* check write permission */
if (!hpte_write_permission(pp, slb_v & key))
return status | DSISR_PROTFAULT;
} else {
if (!hpte_read_permission(pp, slb_v & key))
return status | DSISR_PROTFAULT;
}
/* Check storage key, if applicable */
if (data && (vcpu->arch.shregs.msr & MSR_DR)) {
unsigned int perm = hpte_get_skey_perm(gr, vcpu->arch.amr);
if (status & DSISR_ISSTORE)
perm >>= 1;
if (perm & 1)
return status | DSISR_KEYFAULT;
}
/* Save HPTE info for virtual-mode handler */
vcpu->arch.pgfault_addr = addr;
vcpu->arch.pgfault_index = index;
vcpu->arch.pgfault_hpte[0] = v;
vcpu->arch.pgfault_hpte[1] = r;
/* Check the storage key to see if it is possibly emulated MMIO */
if (data && (vcpu->arch.shregs.msr & MSR_IR) &&
(r & (HPTE_R_KEY_HI | HPTE_R_KEY_LO)) ==
(HPTE_R_KEY_HI | HPTE_R_KEY_LO))
return -2; /* MMIO emulation - load instr word */
return -1; /* send fault up to host kernel mode */
}

176
arch/powerpc/kvm/book3s_hv_rmhandlers.S
View File

@ -601,6 +601,30 @@ kvmppc_interrupt:
stw r12,VCPU_TRAP(r9)
/* Save HEIR (HV emulation assist reg) in last_inst
if this is an HEI (HV emulation interrupt, e40) */
li r3,KVM_INST_FETCH_FAILED
BEGIN_FTR_SECTION
cmpwi r12,BOOK3S_INTERRUPT_H_EMUL_ASSIST
bne 11f
mfspr r3,SPRN_HEIR
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
11: stw r3,VCPU_LAST_INST(r9)
/* these are volatile across C function calls */
mfctr r3
mfxer r4
std r3, VCPU_CTR(r9)
stw r4, VCPU_XER(r9)
BEGIN_FTR_SECTION
/* If this is a page table miss then see if it's theirs or ours */
cmpwi r12, BOOK3S_INTERRUPT_H_DATA_STORAGE
beq kvmppc_hdsi
cmpwi r12, BOOK3S_INTERRUPT_H_INST_STORAGE
beq kvmppc_hisi
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
/* See if this is a leftover HDEC interrupt */
cmpwi r12,BOOK3S_INTERRUPT_HV_DECREMENTER
bne 2f
@ -608,7 +632,7 @@ kvmppc_interrupt:
cmpwi r3,0
bge ignore_hdec
2:
/* See if this is something we can handle in real mode */
/* See if this is an hcall we can handle in real mode */
cmpwi r12,BOOK3S_INTERRUPT_SYSCALL
beq hcall_try_real_mode
@ -624,6 +648,7 @@ BEGIN_FTR_SECTION
1:
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
nohpte_cont:
hcall_real_cont: /* r9 = vcpu, r12 = trap, r13 = paca */
/* Save DEC */
mfspr r5,SPRN_DEC
@ -632,36 +657,21 @@ hcall_real_cont: /* r9 = vcpu, r12 = trap, r13 = paca */
add r5,r5,r6
std r5,VCPU_DEC_EXPIRES(r9)
/* Save HEIR (HV emulation assist reg) in last_inst
if this is an HEI (HV emulation interrupt, e40) */
li r3,-1
BEGIN_FTR_SECTION
cmpwi r12,BOOK3S_INTERRUPT_H_EMUL_ASSIST
bne 11f
mfspr r3,SPRN_HEIR
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
11: stw r3,VCPU_LAST_INST(r9)
/* Save more register state */
mfxer r5
mfdar r6
mfdsisr r7
mfctr r8
stw r5, VCPU_XER(r9)
std r6, VCPU_DAR(r9)
stw r7, VCPU_DSISR(r9)
std r8, VCPU_CTR(r9)
/* grab HDAR & HDSISR if HV data storage interrupt (HDSI) */
BEGIN_FTR_SECTION
/* don't overwrite fault_dar/fault_dsisr if HDSI */
cmpwi r12,BOOK3S_INTERRUPT_H_DATA_STORAGE
beq 6f
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
7: std r6, VCPU_FAULT_DAR(r9)
std r6, VCPU_FAULT_DAR(r9)
stw r7, VCPU_FAULT_DSISR(r9)
/* Save guest CTRL register, set runlatch to 1 */
mfspr r6,SPRN_CTRLF
6: mfspr r6,SPRN_CTRLF
stw r6,VCPU_CTRL(r9)
andi. r0,r6,1
bne 4f
@ -1094,9 +1104,131 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
mtspr SPRN_HSRR1, r7
ba 0x500
6: mfspr r6,SPRN_HDAR
mfspr r7,SPRN_HDSISR
b 7b
/*
* Check whether an HDSI is an HPTE not found fault or something else.
* If it is an HPTE not found fault that is due to the guest accessing
* a page that they have mapped but which we have paged out, then
* we continue on with the guest exit path. In all other cases,
* reflect the HDSI to the guest as a DSI.
*/
kvmppc_hdsi:
mfspr r4, SPRN_HDAR
mfspr r6, SPRN_HDSISR
/* HPTE not found fault or protection fault? */
andis. r0, r6, (DSISR_NOHPTE | DSISR_PROTFAULT)@h
beq 1f /* if not, send it to the guest */
andi. r0, r11, MSR_DR /* data relocation enabled? */
beq 3f
clrrdi r0, r4, 28
PPC_SLBFEE_DOT(r5, r0) /* if so, look up SLB */
bne 1f /* if no SLB entry found */
4: std r4, VCPU_FAULT_DAR(r9)
stw r6, VCPU_FAULT_DSISR(r9)
/* Search the hash table. */
mr r3, r9 /* vcpu pointer */
li r7, 1 /* data fault */
bl .kvmppc_hpte_hv_fault
ld r9, HSTATE_KVM_VCPU(r13)
ld r10, VCPU_PC(r9)
ld r11, VCPU_MSR(r9)
li r12, BOOK3S_INTERRUPT_H_DATA_STORAGE
cmpdi r3, 0 /* retry the instruction */
beq 6f
cmpdi r3, -1 /* handle in kernel mode */
beq nohpte_cont
cmpdi r3, -2 /* MMIO emulation; need instr word */
beq 2f
/* Synthesize a DSI for the guest */
ld r4, VCPU_FAULT_DAR(r9)
mr r6, r3
1: mtspr SPRN_DAR, r4
mtspr SPRN_DSISR, r6
mtspr SPRN_SRR0, r10
mtspr SPRN_SRR1, r11
li r10, BOOK3S_INTERRUPT_DATA_STORAGE
li r11, (MSR_ME << 1) | 1 /* synthesize MSR_SF | MSR_ME */
rotldi r11, r11, 63
6: ld r7, VCPU_CTR(r9)
lwz r8, VCPU_XER(r9)
mtctr r7
mtxer r8
mr r4, r9
b fast_guest_return
3: ld r5, VCPU_KVM(r9) /* not relocated, use VRMA */
ld r5, KVM_VRMA_SLB_V(r5)
b 4b
/* If this is for emulated MMIO, load the instruction word */
2: li r8, KVM_INST_FETCH_FAILED /* In case lwz faults */
/* Set guest mode to 'jump over instruction' so if lwz faults
* we'll just continue at the next IP. */
li r0, KVM_GUEST_MODE_SKIP
stb r0, HSTATE_IN_GUEST(r13)
/* Do the access with MSR:DR enabled */
mfmsr r3
ori r4, r3, MSR_DR /* Enable paging for data */
mtmsrd r4
lwz r8, 0(r10)
mtmsrd r3
/* Store the result */
stw r8, VCPU_LAST_INST(r9)
/* Unset guest mode. */
li r0, KVM_GUEST_MODE_NONE
stb r0, HSTATE_IN_GUEST(r13)
b nohpte_cont
/*
* Similarly for an HISI, reflect it to the guest as an ISI unless
* it is an HPTE not found fault for a page that we have paged out.
*/
kvmppc_hisi:
andis. r0, r11, SRR1_ISI_NOPT@h
beq 1f
andi. r0, r11, MSR_IR /* instruction relocation enabled? */
beq 3f
clrrdi r0, r10, 28
PPC_SLBFEE_DOT(r5, r0) /* if so, look up SLB */
bne 1f /* if no SLB entry found */
4:
/* Search the hash table. */
mr r3, r9 /* vcpu pointer */
mr r4, r10
mr r6, r11
li r7, 0 /* instruction fault */
bl .kvmppc_hpte_hv_fault
ld r9, HSTATE_KVM_VCPU(r13)
ld r10, VCPU_PC(r9)
ld r11, VCPU_MSR(r9)
li r12, BOOK3S_INTERRUPT_H_INST_STORAGE
cmpdi r3, 0 /* retry the instruction */
beq 6f
cmpdi r3, -1 /* handle in kernel mode */
beq nohpte_cont
/* Synthesize an ISI for the guest */
mr r11, r3
1: mtspr SPRN_SRR0, r10
mtspr SPRN_SRR1, r11
li r10, BOOK3S_INTERRUPT_INST_STORAGE
li r11, (MSR_ME << 1) | 1 /* synthesize MSR_SF | MSR_ME */
rotldi r11, r11, 63
6: ld r7, VCPU_CTR(r9)
lwz r8, VCPU_XER(r9)
mtctr r7
mtxer r8
mr r4, r9
b fast_guest_return
3: ld r6, VCPU_KVM(r9) /* not relocated, use VRMA */
ld r5, KVM_VRMA_SLB_V(r6)
b 4b
/*
* Try to handle an hcall in real mode.

9
arch/powerpc/kvm/book3s_paired_singles.c
View File

@ -196,7 +196,8 @@ static int kvmppc_emulate_fpr_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_inject_pf(vcpu, addr, false);
goto done_load;
} else if (r == EMULATE_DO_MMIO) {
emulated = kvmppc_handle_load(run, vcpu, KVM_REG_FPR | rs, len, 1);
emulated = kvmppc_handle_load(run, vcpu, KVM_MMIO_REG_FPR | rs,
len, 1);
goto done_load;
}
@ -286,11 +287,13 @@ static int kvmppc_emulate_psq_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_inject_pf(vcpu, addr, false);
goto done_load;
} else if ((r == EMULATE_DO_MMIO) && w) {
emulated = kvmppc_handle_load(run, vcpu, KVM_REG_FPR | rs, 4, 1);
emulated = kvmppc_handle_load(run, vcpu, KVM_MMIO_REG_FPR | rs,
4, 1);
vcpu->arch.qpr[rs] = tmp[1];
goto done_load;
} else if (r == EMULATE_DO_MMIO) {
emulated = kvmppc_handle_load(run, vcpu, KVM_REG_FQPR | rs, 8, 1);
emulated = kvmppc_handle_load(run, vcpu, KVM_MMIO_REG_FQPR | rs,
8, 1);
goto done_load;
}

178
arch/powerpc/kvm/book3s_pr.c
View File

@ -51,15 +51,19 @@ static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
#define MSR_USER32 MSR_USER
#define MSR_USER64 MSR_USER
#define HW_PAGE_SIZE PAGE_SIZE
#define __hard_irq_disable local_irq_disable
#define __hard_irq_enable local_irq_enable
#endif
void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
#ifdef CONFIG_PPC_BOOK3S_64
memcpy(to_svcpu(vcpu)->slb, to_book3s(vcpu)->slb_shadow, sizeof(to_svcpu(vcpu)->slb));
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
sizeof(get_paca()->shadow_vcpu));
to_svcpu(vcpu)->slb_max = to_book3s(vcpu)->slb_shadow_max;
svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
svcpu_put(svcpu);
#endif
#ifdef CONFIG_PPC_BOOK3S_32
@ -70,10 +74,12 @@ void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
{
#ifdef CONFIG_PPC_BOOK3S_64
memcpy(to_book3s(vcpu)->slb_shadow, to_svcpu(vcpu)->slb, sizeof(to_svcpu(vcpu)->slb));
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
sizeof(get_paca()->shadow_vcpu));
to_book3s(vcpu)->slb_shadow_max = to_svcpu(vcpu)->slb_max;
to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
svcpu_put(svcpu);
#endif
kvmppc_giveup_ext(vcpu, MSR_FP);
@ -151,14 +157,16 @@ void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
#ifdef CONFIG_PPC_BOOK3S_64
if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
kvmppc_mmu_book3s_64_init(vcpu);
to_book3s(vcpu)->hior = 0xfff00000;
if (!to_book3s(vcpu)->hior_explicit)
to_book3s(vcpu)->hior = 0xfff00000;
to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
vcpu->arch.cpu_type = KVM_CPU_3S_64;
} else
#endif
{
kvmppc_mmu_book3s_32_init(vcpu);
to_book3s(vcpu)->hior = 0;
if (!to_book3s(vcpu)->hior_explicit)
to_book3s(vcpu)->hior = 0;
to_book3s(vcpu)->msr_mask = 0xffffffffULL;
vcpu->arch.cpu_type = KVM_CPU_3S_32;
}
@ -308,19 +316,22 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
if (page_found == -ENOENT) {
/* Page not found in guest PTE entries */
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
vcpu->arch.shared->dsisr = svcpu->fault_dsisr;
vcpu->arch.shared->msr |=
(to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
(svcpu->shadow_srr1 & 0x00000000f8000000ULL);
svcpu_put(svcpu);
kvmppc_book3s_queue_irqprio(vcpu, vec);
} else if (page_found == -EPERM) {
/* Storage protection */
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
vcpu->arch.shared->dsisr =
to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
vcpu->arch.shared->dsisr = svcpu->fault_dsisr & ~DSISR_NOHPTE;
vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
vcpu->arch.shared->msr |=
(to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
svcpu->shadow_srr1 & 0x00000000f8000000ULL;
svcpu_put(svcpu);
kvmppc_book3s_queue_irqprio(vcpu, vec);
} else if (page_found == -EINVAL) {
/* Page not found in guest SLB */
@ -517,24 +528,29 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
run->ready_for_interrupt_injection = 1;
trace_kvm_book3s_exit(exit_nr, vcpu);
preempt_enable();
kvm_resched(vcpu);
switch (exit_nr) {
case BOOK3S_INTERRUPT_INST_STORAGE:
{
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
ulong shadow_srr1 = svcpu->shadow_srr1;
vcpu->stat.pf_instruc++;
#ifdef CONFIG_PPC_BOOK3S_32
/* We set segments as unused segments when invalidating them. So
* treat the respective fault as segment fault. */
if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT]
== SR_INVALID) {
if (svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT] == SR_INVALID) {
kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
r = RESUME_GUEST;
svcpu_put(svcpu);
break;
}
#endif
svcpu_put(svcpu);
/* only care about PTEG not found errors, but leave NX alone */
if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) {
if (shadow_srr1 & 0x40000000) {
r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
vcpu->stat.sp_instruc++;
} else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
@ -547,33 +563,37 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
r = RESUME_GUEST;
} else {
vcpu->arch.shared->msr |=
to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
vcpu->arch.shared->msr |= shadow_srr1 & 0x58000000;
kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
r = RESUME_GUEST;
}
break;
}
case BOOK3S_INTERRUPT_DATA_STORAGE:
{
ulong dar = kvmppc_get_fault_dar(vcpu);
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
u32 fault_dsisr = svcpu->fault_dsisr;
vcpu->stat.pf_storage++;
#ifdef CONFIG_PPC_BOOK3S_32
/* We set segments as unused segments when invalidating them. So
* treat the respective fault as segment fault. */
if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) {
if ((svcpu->sr[dar >> SID_SHIFT]) == SR_INVALID) {
kvmppc_mmu_map_segment(vcpu, dar);
r = RESUME_GUEST;
svcpu_put(svcpu);
break;
}
#endif
svcpu_put(svcpu);
/* The only case we need to handle is missing shadow PTEs */
if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
if (fault_dsisr & DSISR_NOHPTE) {
r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
} else {
vcpu->arch.shared->dar = dar;
vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
vcpu->arch.shared->dsisr = fault_dsisr;
kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
r = RESUME_GUEST;
}
@ -609,10 +629,13 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
case BOOK3S_INTERRUPT_PROGRAM:
{
enum emulation_result er;
struct kvmppc_book3s_shadow_vcpu *svcpu;
ulong flags;
program_interrupt:
flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
svcpu = svcpu_get(vcpu);
flags = svcpu->shadow_srr1 & 0x1f0000ull;
svcpu_put(svcpu);
if (vcpu->arch.shared->msr & MSR_PR) {
#ifdef EXIT_DEBUG
@ -740,20 +763,33 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
r = RESUME_GUEST;
break;
default:
{
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
ulong shadow_srr1 = svcpu->shadow_srr1;
svcpu_put(svcpu);
/* Ugh - bork here! What did we get? */
printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1);
exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
r = RESUME_HOST;
BUG();
break;
}
}
if (!(r & RESUME_HOST)) {
/* To avoid clobbering exit_reason, only check for signals if
* we aren't already exiting to userspace for some other
* reason. */
/*
* Interrupts could be timers for the guest which we have to
* inject again, so let's postpone them until we're in the guest
* and if we really did time things so badly, then we just exit
* again due to a host external interrupt.
*/
__hard_irq_disable();
if (signal_pending(current)) {
__hard_irq_enable();
#ifdef EXIT_DEBUG
printk(KERN_EMERG "KVM: Going back to host\n");
#endif
@ -761,10 +797,12 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
run->exit_reason = KVM_EXIT_INTR;
r = -EINTR;
} else {
preempt_disable();
/* In case an interrupt came in that was triggered
* from userspace (like DEC), we need to check what
* to inject now! */
kvmppc_core_deliver_interrupts(vcpu);
kvmppc_core_prepare_to_enter(vcpu);
}
}
@ -836,6 +874,38 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
return 0;
}
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
int r = -EINVAL;
switch (reg->id) {
case KVM_REG_PPC_HIOR:
r = put_user(to_book3s(vcpu)->hior, (u64 __user *)reg->addr);
break;
default:
break;
}
return r;
}
int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
int r = -EINVAL;
switch (reg->id) {
case KVM_REG_PPC_HIOR:
r = get_user(to_book3s(vcpu)->hior, (u64 __user *)reg->addr);
if (!r)
to_book3s(vcpu)->hior_explicit = true;
break;
default:
break;
}
return r;
}
int kvmppc_core_check_processor_compat(void)
{
return 0;
@ -923,16 +993,31 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
#endif
ulong ext_msr;
preempt_disable();
/* Check if we can run the vcpu at all */
if (!vcpu->arch.sane) {
kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
return -EINVAL;
ret = -EINVAL;
goto out;
}
kvmppc_core_prepare_to_enter(vcpu);
/*
* Interrupts could be timers for the guest which we have to inject
* again, so let's postpone them until we're in the guest and if we
* really did time things so badly, then we just exit again due to
* a host external interrupt.
*/
__hard_irq_disable();
/* No need to go into the guest when all we do is going out */
if (signal_pending(current)) {
__hard_irq_enable();
kvm_run->exit_reason = KVM_EXIT_INTR;
return -EINTR;
ret = -EINTR;
goto out;
}
/* Save FPU state in stack */
@ -974,8 +1059,6 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
kvm_guest_exit();
local_irq_disable();
current->thread.regs->msr = ext_msr;
/* Make sure we save the guest FPU/Altivec/VSX state */
@ -1002,9 +1085,50 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
current->thread.used_vsr = used_vsr;
#endif
out:
preempt_enable();
return ret;
}
/*
* Get (and clear) the dirty memory log for a memory slot.
*/
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
struct kvm_dirty_log *log)
{
struct kvm_memory_slot *memslot;
struct kvm_vcpu *vcpu;
ulong ga, ga_end;
int is_dirty = 0;
int r;
unsigned long n;
mutex_lock(&kvm->slots_lock);
r = kvm_get_dirty_log(kvm, log, &is_dirty);
if (r)
goto out;
/* If nothing is dirty, don't bother messing with page tables. */
if (is_dirty) {
memslot = id_to_memslot(kvm->memslots, log->slot);
ga = memslot->base_gfn << PAGE_SHIFT;
ga_end = ga + (memslot->npages << PAGE_SHIFT);
kvm_for_each_vcpu(n, vcpu, kvm)
kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
n = kvm_dirty_bitmap_bytes(memslot);
memset(memslot->dirty_bitmap, 0, n);
}
r = 0;
out:
mutex_unlock(&kvm->slots_lock);
return r;
}
int kvmppc_core_prepare_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem)
{

150
arch/powerpc/kvm/booke.c
View File

@ -124,12 +124,6 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
vcpu->arch.shared->msr = new_msr;
kvmppc_mmu_msr_notify(vcpu, old_msr);
if (vcpu->arch.shared->msr & MSR_WE) {
kvm_vcpu_block(vcpu);
kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
};
kvmppc_vcpu_sync_spe(vcpu);
}
@ -258,9 +252,11 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
allowed = vcpu->arch.shared->msr & MSR_ME;
msr_mask = 0;
break;
case BOOKE_IRQPRIO_EXTERNAL:
case BOOKE_IRQPRIO_DECREMENTER:
case BOOKE_IRQPRIO_FIT:
keep_irq = true;
/* fall through */
case BOOKE_IRQPRIO_EXTERNAL:
allowed = vcpu->arch.shared->msr & MSR_EE;
allowed = allowed && !crit;
msr_mask = MSR_CE|MSR_ME|MSR_DE;
@ -276,7 +272,7 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
vcpu->arch.shared->srr1 = vcpu->arch.shared->msr;
vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
if (update_esr == true)
vcpu->arch.esr = vcpu->arch.queued_esr;
vcpu->arch.shared->esr = vcpu->arch.queued_esr;
if (update_dear == true)
vcpu->arch.shared->dar = vcpu->arch.queued_dear;
kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
@ -288,13 +284,26 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
return allowed;
}
/* Check pending exceptions and deliver one, if possible. */
void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
static void update_timer_ints(struct kvm_vcpu *vcpu)
{
if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
kvmppc_core_queue_dec(vcpu);
else
kvmppc_core_dequeue_dec(vcpu);
}
static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
{
unsigned long *pending = &vcpu->arch.pending_exceptions;
unsigned long old_pending = vcpu->arch.pending_exceptions;
unsigned int priority;
if (vcpu->requests) {
if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) {
smp_mb();
update_timer_ints(vcpu);
}
}
priority = __ffs(*pending);
while (priority <= BOOKE_IRQPRIO_MAX) {
if (kvmppc_booke_irqprio_deliver(vcpu, priority))
@ -306,10 +315,24 @@ void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
}
/* Tell the guest about our interrupt status */
if (*pending)
vcpu->arch.shared->int_pending = 1;
else if (old_pending)
vcpu->arch.shared->int_pending = 0;
vcpu->arch.shared->int_pending = !!*pending;
}
/* Check pending exceptions and deliver one, if possible. */
void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
{
WARN_ON_ONCE(!irqs_disabled());
kvmppc_core_check_exceptions(vcpu);
if (vcpu->arch.shared->msr & MSR_WE) {
local_irq_enable();
kvm_vcpu_block(vcpu);
local_irq_disable();
kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
kvmppc_core_check_exceptions(vcpu);
};
}
int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
@ -322,11 +345,21 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
}
local_irq_disable();
kvmppc_core_prepare_to_enter(vcpu);
if (signal_pending(current)) {
kvm_run->exit_reason = KVM_EXIT_INTR;
ret = -EINTR;
goto out;
}
kvm_guest_enter();
ret = __kvmppc_vcpu_run(kvm_run, vcpu);
kvm_guest_exit();
local_irq_enable();
out:
local_irq_enable();
return ret;
}
@ -603,7 +636,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
local_irq_disable();
kvmppc_core_deliver_interrupts(vcpu);
kvmppc_core_prepare_to_enter(vcpu);
if (!(r & RESUME_HOST)) {
/* To avoid clobbering exit_reason, only check for signals if
@ -628,6 +661,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.pc = 0;
vcpu->arch.shared->msr = 0;
vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
vcpu->arch.shared->pir = vcpu->vcpu_id;
kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
vcpu->arch.shadow_pid = 1;
@ -662,10 +696,10 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
regs->sprg1 = vcpu->arch.shared->sprg1;
regs->sprg2 = vcpu->arch.shared->sprg2;
regs->sprg3 = vcpu->arch.shared->sprg3;
regs->sprg4 = vcpu->arch.sprg4;
regs->sprg5 = vcpu->arch.sprg5;
regs->sprg6 = vcpu->arch.sprg6;
regs->sprg7 = vcpu->arch.sprg7;
regs->sprg4 = vcpu->arch.shared->sprg4;
regs->sprg5 = vcpu->arch.shared->sprg5;
regs->sprg6 = vcpu->arch.shared->sprg6;
regs->sprg7 = vcpu->arch.shared->sprg7;
for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
@ -690,10 +724,10 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
vcpu->arch.shared->sprg1 = regs->sprg1;
vcpu->arch.shared->sprg2 = regs->sprg2;
vcpu->arch.shared->sprg3 = regs->sprg3;
vcpu->arch.sprg4 = regs->sprg4;
vcpu->arch.sprg5 = regs->sprg5;
vcpu->arch.sprg6 = regs->sprg6;
vcpu->arch.sprg7 = regs->sprg7;
vcpu->arch.shared->sprg4 = regs->sprg4;
vcpu->arch.shared->sprg5 = regs->sprg5;
vcpu->arch.shared->sprg6 = regs->sprg6;
vcpu->arch.shared->sprg7 = regs->sprg7;
for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
@ -711,7 +745,7 @@ static void get_sregs_base(struct kvm_vcpu *vcpu,
sregs->u.e.csrr0 = vcpu->arch.csrr0;
sregs->u.e.csrr1 = vcpu->arch.csrr1;
sregs->u.e.mcsr = vcpu->arch.mcsr;
sregs->u.e.esr = vcpu->arch.esr;
sregs->u.e.esr = vcpu->arch.shared->esr;
sregs->u.e.dear = vcpu->arch.shared->dar;
sregs->u.e.tsr = vcpu->arch.tsr;
sregs->u.e.tcr = vcpu->arch.tcr;
@ -729,28 +763,19 @@ static int set_sregs_base(struct kvm_vcpu *vcpu,
vcpu->arch.csrr0 = sregs->u.e.csrr0;
vcpu->arch.csrr1 = sregs->u.e.csrr1;
vcpu->arch.mcsr = sregs->u.e.mcsr;
vcpu->arch.esr = sregs->u.e.esr;
vcpu->arch.shared->esr = sregs->u.e.esr;
vcpu->arch.shared->dar = sregs->u.e.dear;
vcpu->arch.vrsave = sregs->u.e.vrsave;
vcpu->arch.tcr = sregs->u.e.tcr;
kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC)
if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
vcpu->arch.dec = sregs->u.e.dec;
kvmppc_emulate_dec(vcpu);
kvmppc_emulate_dec(vcpu);
}
if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
/*
* FIXME: existing KVM timer handling is incomplete.
* TSR cannot be read by the guest, and its value in
* vcpu->arch is always zero. For now, just handle
* the case where the caller is trying to inject a
* decrementer interrupt.
*/
if ((sregs->u.e.tsr & TSR_DIS) &&
(vcpu->arch.tcr & TCR_DIE))
kvmppc_core_queue_dec(vcpu);
vcpu->arch.tsr = sregs->u.e.tsr;
update_timer_ints(vcpu);
}
return 0;
@ -761,7 +786,7 @@ static void get_sregs_arch206(struct kvm_vcpu *vcpu,
{
sregs->u.e.features |= KVM_SREGS_E_ARCH206;
sregs->u.e.pir = 0;
sregs->u.e.pir = vcpu->vcpu_id;
sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
sregs->u.e.decar = vcpu->arch.decar;
@ -774,7 +799,7 @@ static int set_sregs_arch206(struct kvm_vcpu *vcpu,
if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
return 0;
if (sregs->u.e.pir != 0)
if (sregs->u.e.pir != vcpu->vcpu_id)
return -EINVAL;
vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
@ -862,6 +887,16 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
return kvmppc_core_set_sregs(vcpu, sregs);
}
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
return -EINVAL;
}
int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
return -EINVAL;
}
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
return -ENOTSUPP;
@ -906,6 +941,33 @@ void kvmppc_core_destroy_vm(struct kvm *kvm)
{
}
void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
{
vcpu->arch.tcr = new_tcr;
update_timer_ints(vcpu);
}
void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
{
set_bits(tsr_bits, &vcpu->arch.tsr);
smp_wmb();
kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
kvm_vcpu_kick(vcpu);
}
void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
{
clear_bits(tsr_bits, &vcpu->arch.tsr);
update_timer_ints(vcpu);
}
void kvmppc_decrementer_func(unsigned long data)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
kvmppc_set_tsr_bits(vcpu, TSR_DIS);
}
int __init kvmppc_booke_init(void)
{
unsigned long ivor[16];

4
arch/powerpc/kvm/booke.h
View File

@ -55,6 +55,10 @@ extern unsigned long kvmppc_booke_handlers;
void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr);
void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr);
void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr);
void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance);
int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt);

23
arch/powerpc/kvm/booke_emulate.c
View File

@ -13,6 +13,7 @@
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright IBM Corp. 2008
* Copyright 2011 Freescale Semiconductor, Inc.
*
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
*/
@ -107,7 +108,7 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
case SPRN_DEAR:
vcpu->arch.shared->dar = spr_val; break;
case SPRN_ESR:
vcpu->arch.esr = spr_val; break;
vcpu->arch.shared->esr = spr_val; break;
case SPRN_DBCR0:
vcpu->arch.dbcr0 = spr_val; break;
case SPRN_DBCR1:
@ -115,23 +116,23 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
case SPRN_DBSR:
vcpu->arch.dbsr &= ~spr_val; break;
case SPRN_TSR:
vcpu->arch.tsr &= ~spr_val; break;
kvmppc_clr_tsr_bits(vcpu, spr_val);
break;
case SPRN_TCR:
vcpu->arch.tcr = spr_val;
kvmppc_emulate_dec(vcpu);
kvmppc_set_tcr(vcpu, spr_val);
break;
/* Note: SPRG4-7 are user-readable. These values are
* loaded into the real SPRGs when resuming the
* guest. */
case SPRN_SPRG4:
vcpu->arch.sprg4 = spr_val; break;
vcpu->arch.shared->sprg4 = spr_val; break;
case SPRN_SPRG5:
vcpu->arch.sprg5 = spr_val; break;
vcpu->arch.shared->sprg5 = spr_val; break;
case SPRN_SPRG6:
vcpu->arch.sprg6 = spr_val; break;
vcpu->arch.shared->sprg6 = spr_val; break;
case SPRN_SPRG7:
vcpu->arch.sprg7 = spr_val; break;
vcpu->arch.shared->sprg7 = spr_val; break;
case SPRN_IVPR:
vcpu->arch.ivpr = spr_val;
@ -202,13 +203,17 @@ int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
case SPRN_DEAR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->dar); break;
case SPRN_ESR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.esr); break;
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->esr); break;
case SPRN_DBCR0:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dbcr0); break;
case SPRN_DBCR1:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dbcr1); break;
case SPRN_DBSR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dbsr); break;
case SPRN_TSR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.tsr); break;
case SPRN_TCR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.tcr); break;
case SPRN_IVOR0:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]);

18
arch/powerpc/kvm/booke_interrupts.S
View File

@ -402,19 +402,25 @@ lightweight_exit:
/* Save vcpu pointer for the exception handlers. */
mtspr SPRN_SPRG_WVCPU, r4
lwz r5, VCPU_SHARED(r4)
/* Can't switch the stack pointer until after IVPR is switched,
* because host interrupt handlers would get confused. */
lwz r1, VCPU_GPR(r1)(r4)
/* Host interrupt handlers may have clobbered these guest-readable
* SPRGs, so we need to reload them here with the guest's values. */
lwz r3, VCPU_SPRG4(r4)
/*
* Host interrupt handlers may have clobbered these
* guest-readable SPRGs, or the guest kernel may have
* written directly to the shared area, so we
* need to reload them here with the guest's values.
*/
lwz r3, VCPU_SHARED_SPRG4(r5)
mtspr SPRN_SPRG4W, r3
lwz r3, VCPU_SPRG5(r4)
lwz r3, VCPU_SHARED_SPRG5(r5)
mtspr SPRN_SPRG5W, r3
lwz r3, VCPU_SPRG6(r4)
lwz r3, VCPU_SHARED_SPRG6(r5)
mtspr SPRN_SPRG6W, r3
lwz r3, VCPU_SPRG7(r4)
lwz r3, VCPU_SHARED_SPRG7(r5)
mtspr SPRN_SPRG7W, r3
#ifdef CONFIG_KVM_EXIT_TIMING

32
arch/powerpc/kvm/e500.c
View File

@ -71,9 +71,6 @@ int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.pvr = mfspr(SPRN_PVR);
vcpu_e500->svr = mfspr(SPRN_SVR);
/* Since booke kvm only support one core, update all vcpus' PIR to 0 */
vcpu->vcpu_id = 0;
vcpu->arch.cpu_type = KVM_CPU_E500V2;
return 0;
@ -118,12 +115,12 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
sregs->u.e.mas0 = vcpu_e500->mas0;
sregs->u.e.mas1 = vcpu_e500->mas1;
sregs->u.e.mas2 = vcpu_e500->mas2;
sregs->u.e.mas7_3 = ((u64)vcpu_e500->mas7 << 32) | vcpu_e500->mas3;
sregs->u.e.mas4 = vcpu_e500->mas4;
sregs->u.e.mas6 = vcpu_e500->mas6;
sregs->u.e.mas0 = vcpu->arch.shared->mas0;
sregs->u.e.mas1 = vcpu->arch.shared->mas1;
sregs->u.e.mas2 = vcpu->arch.shared->mas2;
sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
sregs->u.e.mas4 = vcpu->arch.shared->mas4;
sregs->u.e.mas6 = vcpu->arch.shared->mas6;
sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
@ -151,13 +148,12 @@ int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
}
if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
vcpu_e500->mas0 = sregs->u.e.mas0;
vcpu_e500->mas1 = sregs->u.e.mas1;
vcpu_e500->mas2 = sregs->u.e.mas2;
vcpu_e500->mas7 = sregs->u.e.mas7_3 >> 32;
vcpu_e500->mas3 = (u32)sregs->u.e.mas7_3;
vcpu_e500->mas4 = sregs->u.e.mas4;
vcpu_e500->mas6 = sregs->u.e.mas6;
vcpu->arch.shared->mas0 = sregs->u.e.mas0;
vcpu->arch.shared->mas1 = sregs->u.e.mas1;
vcpu->arch.shared->mas2 = sregs->u.e.mas2;
vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
vcpu->arch.shared->mas4 = sregs->u.e.mas4;
vcpu->arch.shared->mas6 = sregs->u.e.mas6;
}
if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
@ -233,6 +229,10 @@ static int __init kvmppc_e500_init(void)
unsigned long ivor[3];
unsigned long max_ivor = 0;
r = kvmppc_core_check_processor_compat();
if (r)
return r;
r = kvmppc_booke_init();
if (r)
return r;

38
arch/powerpc/kvm/e500_emulate.c
View File

@ -89,19 +89,23 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
return EMULATE_FAIL;
vcpu_e500->pid[2] = spr_val; break;
case SPRN_MAS0:
vcpu_e500->mas0 = spr_val; break;
vcpu->arch.shared->mas0 = spr_val; break;
case SPRN_MAS1:
vcpu_e500->mas1 = spr_val; break;
vcpu->arch.shared->mas1 = spr_val; break;
case SPRN_MAS2:
vcpu_e500->mas2 = spr_val; break;
vcpu->arch.shared->mas2 = spr_val; break;
case SPRN_MAS3:
vcpu_e500->mas3 = spr_val; break;
vcpu->arch.shared->mas7_3 &= ~(u64)0xffffffff;
vcpu->arch.shared->mas7_3 |= spr_val;
break;
case SPRN_MAS4:
vcpu_e500->mas4 = spr_val; break;
vcpu->arch.shared->mas4 = spr_val; break;
case SPRN_MAS6:
vcpu_e500->mas6 = spr_val; break;
vcpu->arch.shared->mas6 = spr_val; break;
case SPRN_MAS7:
vcpu_e500->mas7 = spr_val; break;
vcpu->arch.shared->mas7_3 &= (u64)0xffffffff;
vcpu->arch.shared->mas7_3 |= (u64)spr_val << 32;
break;
case SPRN_L1CSR0:
vcpu_e500->l1csr0 = spr_val;
vcpu_e500->l1csr0 &= ~(L1CSR0_DCFI | L1CSR0_CLFC);
@ -143,6 +147,7 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int emulated = EMULATE_DONE;
unsigned long val;
switch (sprn) {
case SPRN_PID:
@ -152,20 +157,23 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
case SPRN_PID2:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->pid[2]); break;
case SPRN_MAS0:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas0); break;
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->mas0); break;
case SPRN_MAS1:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas1); break;
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->mas1); break;
case SPRN_MAS2:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas2); break;
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->mas2); break;
case SPRN_MAS3:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas3); break;
val = (u32)vcpu->arch.shared->mas7_3;
kvmppc_set_gpr(vcpu, rt, val);
break;
case SPRN_MAS4:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas4); break;
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->mas4); break;
case SPRN_MAS6:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas6); break;
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->mas6); break;
case SPRN_MAS7:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas7); break;
val = vcpu->arch.shared->mas7_3 >> 32;
kvmppc_set_gpr(vcpu, rt, val);
break;
case SPRN_TLB0CFG:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->tlb0cfg); break;
case SPRN_TLB1CFG:

769
arch/powerpc/kvm/e500_tlb.c
View File

File diff suppressed because it is too large Load Diff

80
arch/powerpc/kvm/e500_tlb.h
View File

@ -20,13 +20,9 @@
#include <asm/tlb.h>
#include <asm/kvm_e500.h>
#define KVM_E500_TLB0_WAY_SIZE_BIT 7 /* Fixed */
#define KVM_E500_TLB0_WAY_SIZE (1UL << KVM_E500_TLB0_WAY_SIZE_BIT)
#define KVM_E500_TLB0_WAY_SIZE_MASK (KVM_E500_TLB0_WAY_SIZE - 1)
#define KVM_E500_TLB0_WAY_NUM_BIT 1 /* No greater than 7 */
#define KVM_E500_TLB0_WAY_NUM (1UL << KVM_E500_TLB0_WAY_NUM_BIT)
#define KVM_E500_TLB0_WAY_NUM_MASK (KVM_E500_TLB0_WAY_NUM - 1)
/* This geometry is the legacy default -- can be overridden by userspace */
#define KVM_E500_TLB0_WAY_SIZE 128
#define KVM_E500_TLB0_WAY_NUM 2
#define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
#define KVM_E500_TLB1_SIZE 16
@ -58,50 +54,54 @@ extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *);
extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *);
/* TLB helper functions */
static inline unsigned int get_tlb_size(const struct tlbe *tlbe)
static inline unsigned int
get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 7) & 0x1f;
}
static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe)
static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return tlbe->mas2 & 0xfffff000;
}
static inline u64 get_tlb_bytes(const struct tlbe *tlbe)
static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
{
unsigned int pgsize = get_tlb_size(tlbe);
return 1ULL << 10 << pgsize;
}
static inline gva_t get_tlb_end(const struct tlbe *tlbe)
static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
{
u64 bytes = get_tlb_bytes(tlbe);
return get_tlb_eaddr(tlbe) + bytes - 1;
}
static inline u64 get_tlb_raddr(const struct tlbe *tlbe)
static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
{
u64 rpn = tlbe->mas7;
return (rpn << 32) | (tlbe->mas3 & 0xfffff000);
return tlbe->mas7_3 & ~0xfffULL;
}
static inline unsigned int get_tlb_tid(const struct tlbe *tlbe)
static inline unsigned int
get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 16) & 0xff;
}
static inline unsigned int get_tlb_ts(const struct tlbe *tlbe)
static inline unsigned int
get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 12) & 0x1;
}
static inline unsigned int get_tlb_v(const struct tlbe *tlbe)
static inline unsigned int
get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 31) & 0x1;
}
static inline unsigned int get_tlb_iprot(const struct tlbe *tlbe)
static inline unsigned int
get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 30) & 0x1;
}
@ -121,59 +121,37 @@ static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
return !!(vcpu->arch.shared->msr & MSR_PR);
}
static inline unsigned int get_cur_spid(
const struct kvmppc_vcpu_e500 *vcpu_e500)
static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
{
return (vcpu_e500->mas6 >> 16) & 0xff;
return (vcpu->arch.shared->mas6 >> 16) & 0xff;
}
static inline unsigned int get_cur_sas(
const struct kvmppc_vcpu_e500 *vcpu_e500)
static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
{
return vcpu_e500->mas6 & 0x1;
return vcpu->arch.shared->mas6 & 0x1;
}
static inline unsigned int get_tlb_tlbsel(
const struct kvmppc_vcpu_e500 *vcpu_e500)
static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
{
/*
* Manual says that tlbsel has 2 bits wide.
* Since we only have two TLBs, only lower bit is used.
*/
return (vcpu_e500->mas0 >> 28) & 0x1;
return (vcpu->arch.shared->mas0 >> 28) & 0x1;
}
static inline unsigned int get_tlb_nv_bit(
const struct kvmppc_vcpu_e500 *vcpu_e500)
static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
{
return vcpu_e500->mas0 & 0xfff;
return vcpu->arch.shared->mas0 & 0xfff;
}
static inline unsigned int get_tlb_esel_bit(
const struct kvmppc_vcpu_e500 *vcpu_e500)
static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
{
return (vcpu_e500->mas0 >> 16) & 0xfff;
}
static inline unsigned int get_tlb_esel(
const struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel)
{
unsigned int esel = get_tlb_esel_bit(vcpu_e500);
if (tlbsel == 0) {
esel &= KVM_E500_TLB0_WAY_NUM_MASK;
esel |= ((vcpu_e500->mas2 >> 12) & KVM_E500_TLB0_WAY_SIZE_MASK)
<< KVM_E500_TLB0_WAY_NUM_BIT;
} else {
esel &= KVM_E500_TLB1_SIZE - 1;
}
return esel;
return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
}
static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
const struct tlbe *tlbe)
const struct kvm_book3e_206_tlb_entry *tlbe)
{
gpa_t gpa;

59
arch/powerpc/kvm/emulate.c
View File

@ -13,6 +13,7 @@
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright IBM Corp. 2007
* Copyright 2011 Freescale Semiconductor, Inc.
*
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
*/
@ -69,54 +70,55 @@
#define OP_STH 44
#define OP_STHU 45
#ifdef CONFIG_PPC_BOOK3S
static int kvmppc_dec_enabled(struct kvm_vcpu *vcpu)
{
return 1;
}
#else
static int kvmppc_dec_enabled(struct kvm_vcpu *vcpu)
{
return vcpu->arch.tcr & TCR_DIE;
}
#endif
void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
{
unsigned long dec_nsec;
unsigned long long dec_time;
pr_debug("mtDEC: %x\n", vcpu->arch.dec);
hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
#ifdef CONFIG_PPC_BOOK3S
/* mtdec lowers the interrupt line when positive. */
kvmppc_core_dequeue_dec(vcpu);
/* POWER4+ triggers a dec interrupt if the value is < 0 */
if (vcpu->arch.dec & 0x80000000) {
hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
kvmppc_core_queue_dec(vcpu);
return;
}
#endif
if (kvmppc_dec_enabled(vcpu)) {
/* The decrementer ticks at the same rate as the timebase, so
* that's how we convert the guest DEC value to the number of
* host ticks. */
hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
dec_nsec = vcpu->arch.dec;
dec_nsec *= 1000;
dec_nsec /= tb_ticks_per_usec;
hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec),
HRTIMER_MODE_REL);
vcpu->arch.dec_jiffies = get_tb();
} else {
hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
}
#ifdef CONFIG_BOOKE
/* On BOOKE, DEC = 0 is as good as decrementer not enabled */
if (vcpu->arch.dec == 0)
return;
#endif
/*
* The decrementer ticks at the same rate as the timebase, so
* that's how we convert the guest DEC value to the number of
* host ticks.
*/
dec_time = vcpu->arch.dec;
dec_time *= 1000;
do_div(dec_time, tb_ticks_per_usec);
dec_nsec = do_div(dec_time, NSEC_PER_SEC);
hrtimer_start(&vcpu->arch.dec_timer,
ktime_set(dec_time, dec_nsec), HRTIMER_MODE_REL);
vcpu->arch.dec_jiffies = get_tb();
}
u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb)
{
u64 jd = tb - vcpu->arch.dec_jiffies;
#ifdef CONFIG_BOOKE
if (vcpu->arch.dec < jd)
return 0;
#endif
return vcpu->arch.dec - jd;
}
@ -159,7 +161,8 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
case OP_TRAP_64:
kvmppc_core_queue_program(vcpu, SRR1_PROGTRAP);
#else
kvmppc_core_queue_program(vcpu, vcpu->arch.esr | ESR_PTR);
kvmppc_core_queue_program(vcpu,
vcpu->arch.shared->esr | ESR_PTR);
#endif
advance = 0;
break;

148
arch/powerpc/kvm/powerpc.c
View File

@ -39,7 +39,8 @@
int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
return !(v->arch.shared->msr & MSR_WE) ||
!!(v->arch.pending_exceptions);
!!(v->arch.pending_exceptions) ||
v->requests;
}
int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
@ -66,7 +67,7 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
vcpu->arch.magic_page_pa = param1;
vcpu->arch.magic_page_ea = param2;
r2 = KVM_MAGIC_FEAT_SR;
r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
r = HC_EV_SUCCESS;
break;
@ -171,8 +172,11 @@ void kvm_arch_check_processor_compat(void *rtn)
*(int *)rtn = kvmppc_core_check_processor_compat();
}
int kvm_arch_init_vm(struct kvm *kvm)
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
if (type)
return -EINVAL;
return kvmppc_core_init_vm(kvm);
}
@ -208,17 +212,22 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_PPC_BOOKE_SREGS:
#else
case KVM_CAP_PPC_SEGSTATE:
case KVM_CAP_PPC_HIOR:
case KVM_CAP_PPC_PAPR:
#endif
case KVM_CAP_PPC_UNSET_IRQ:
case KVM_CAP_PPC_IRQ_LEVEL:
case KVM_CAP_ENABLE_CAP:
case KVM_CAP_ONE_REG:
r = 1;
break;
#ifndef CONFIG_KVM_BOOK3S_64_HV
case KVM_CAP_PPC_PAIRED_SINGLES:
case KVM_CAP_PPC_OSI:
case KVM_CAP_PPC_GET_PVINFO:
#ifdef CONFIG_KVM_E500
case KVM_CAP_SW_TLB:
#endif
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
@ -238,7 +247,26 @@ int kvm_dev_ioctl_check_extension(long ext)
if (cpu_has_feature(CPU_FTR_ARCH_201))
r = 2;
break;
case KVM_CAP_SYNC_MMU:
r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
break;
#endif
case KVM_CAP_NR_VCPUS:
/*
* Recommending a number of CPUs is somewhat arbitrary; we
* return the number of present CPUs for -HV (since a host
* will have secondary threads "offline"), and for other KVM
* implementations just count online CPUs.
*/
#ifdef CONFIG_KVM_BOOK3S_64_HV
r = num_present_cpus();
#else
r = num_online_cpus();
#endif
break;
case KVM_CAP_MAX_VCPUS:
r = KVM_MAX_VCPUS;
break;
default:
r = 0;
break;
@ -253,6 +281,16 @@ long kvm_arch_dev_ioctl(struct file *filp,
return -EINVAL;
}
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
}
int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
{
return 0;
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_memory_slot old,
@ -279,9 +317,10 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
struct kvm_vcpu *vcpu;
vcpu = kvmppc_core_vcpu_create(kvm, id);
vcpu->arch.wqp = &vcpu->wq;
if (!IS_ERR(vcpu))
if (!IS_ERR(vcpu)) {
vcpu->arch.wqp = &vcpu->wq;
kvmppc_create_vcpu_debugfs(vcpu, id);
}
return vcpu;
}
@ -305,18 +344,6 @@ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
return kvmppc_core_pending_dec(vcpu);
}
static void kvmppc_decrementer_func(unsigned long data)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
kvmppc_core_queue_dec(vcpu);
if (waitqueue_active(vcpu->arch.wqp)) {
wake_up_interruptible(vcpu->arch.wqp);
vcpu->stat.halt_wakeup++;
}
}
/*
* low level hrtimer wake routine. Because this runs in hardirq context
* we schedule a tasklet to do the real work.
@ -431,20 +458,20 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
case KVM_REG_GPR:
switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
case KVM_MMIO_REG_GPR:
kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
break;
case KVM_REG_FPR:
vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
case KVM_MMIO_REG_FPR:
vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
break;
#ifdef CONFIG_PPC_BOOK3S
case KVM_REG_QPR:
vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
case KVM_MMIO_REG_QPR:
vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
break;
case KVM_REG_FQPR:
vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
case KVM_MMIO_REG_FQPR:
vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
break;
#endif
default:
@ -553,8 +580,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
vcpu->arch.hcall_needed = 0;
}
kvmppc_core_deliver_interrupts(vcpu);
r = kvmppc_vcpu_run(run, vcpu);
if (vcpu->sigset_active)
@ -563,6 +588,21 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
return r;
}
void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
{
int me;
int cpu = vcpu->cpu;
me = get_cpu();
if (waitqueue_active(vcpu->arch.wqp)) {
wake_up_interruptible(vcpu->arch.wqp);
vcpu->stat.halt_wakeup++;
} else if (cpu != me && cpu != -1) {
smp_send_reschedule(vcpu->cpu);
}
put_cpu();
}
int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
if (irq->irq == KVM_INTERRUPT_UNSET) {
@ -571,13 +611,7 @@ int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
}
kvmppc_core_queue_external(vcpu, irq);
if (waitqueue_active(vcpu->arch.wqp)) {
wake_up_interruptible(vcpu->arch.wqp);
vcpu->stat.halt_wakeup++;
} else if (vcpu->cpu != -1) {
smp_send_reschedule(vcpu->cpu);
}
kvm_vcpu_kick(vcpu);
return 0;
}
@ -599,6 +633,19 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
r = 0;
vcpu->arch.papr_enabled = true;
break;
#ifdef CONFIG_KVM_E500
case KVM_CAP_SW_TLB: {
struct kvm_config_tlb cfg;
void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
r = -EFAULT;
if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
break;
r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
break;
}
#endif
default:
r = -EINVAL;
break;
@ -648,6 +695,32 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
break;
}
case KVM_SET_ONE_REG:
case KVM_GET_ONE_REG:
{
struct kvm_one_reg reg;
r = -EFAULT;
if (copy_from_user(&reg, argp, sizeof(reg)))
goto out;
if (ioctl == KVM_SET_ONE_REG)
r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
else
r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
break;
}
#ifdef CONFIG_KVM_E500
case KVM_DIRTY_TLB: {
struct kvm_dirty_tlb dirty;
r = -EFAULT;
if (copy_from_user(&dirty, argp, sizeof(dirty)))
goto out;
r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
break;
}
#endif
default:
r = -EINVAL;
}
@ -656,6 +729,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
return r;
}
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
return VM_FAULT_SIGBUS;
}
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
u32 inst_lis = 0x3c000000;

62
arch/powerpc/kvm/trace.h
View File

@ -118,11 +118,14 @@ TRACE_EVENT(kvm_book3s_exit,
),
TP_fast_assign(
struct kvmppc_book3s_shadow_vcpu *svcpu;
__entry->exit_nr = exit_nr;
__entry->pc = kvmppc_get_pc(vcpu);
__entry->dar = kvmppc_get_fault_dar(vcpu);
__entry->msr = vcpu->arch.shared->msr;
__entry->srr1 = to_svcpu(vcpu)->shadow_srr1;
svcpu = svcpu_get(vcpu);
__entry->srr1 = svcpu->shadow_srr1;
svcpu_put(svcpu);
),
TP_printk("exit=0x%x | pc=0x%lx | msr=0x%lx | dar=0x%lx | srr1=0x%lx",
@ -337,6 +340,63 @@ TRACE_EVENT(kvm_book3s_slbmte,
#endif /* CONFIG_PPC_BOOK3S */
/*************************************************************************
* Book3E trace points *
*************************************************************************/
#ifdef CONFIG_BOOKE
TRACE_EVENT(kvm_booke206_stlb_write,
TP_PROTO(__u32 mas0, __u32 mas8, __u32 mas1, __u64 mas2, __u64 mas7_3),
TP_ARGS(mas0, mas8, mas1, mas2, mas7_3),
TP_STRUCT__entry(
__field( __u32, mas0 )
__field( __u32, mas8 )
__field( __u32, mas1 )
__field( __u64, mas2 )
__field( __u64, mas7_3 )
),
TP_fast_assign(
__entry->mas0 = mas0;
__entry->mas8 = mas8;
__entry->mas1 = mas1;
__entry->mas2 = mas2;
__entry->mas7_3 = mas7_3;
),
TP_printk("mas0=%x mas8=%x mas1=%x mas2=%llx mas7_3=%llx",
__entry->mas0, __entry->mas8, __entry->mas1,
__entry->mas2, __entry->mas7_3)
);
TRACE_EVENT(kvm_booke206_gtlb_write,
TP_PROTO(__u32 mas0, __u32 mas1, __u64 mas2, __u64 mas7_3),
TP_ARGS(mas0, mas1, mas2, mas7_3),
TP_STRUCT__entry(
__field( __u32, mas0 )
__field( __u32, mas1 )
__field( __u64, mas2 )
__field( __u64, mas7_3 )
),
TP_fast_assign(
__entry->mas0 = mas0;
__entry->mas1 = mas1;
__entry->mas2 = mas2;
__entry->mas7_3 = mas7_3;
),
TP_printk("mas0=%x mas1=%x mas2=%llx mas7_3=%llx",
__entry->mas0, __entry->mas1,
__entry->mas2, __entry->mas7_3)
);
#endif
#endif /* _TRACE_KVM_H */
/* This part must be outside protection */

2
arch/powerpc/mm/hugetlbpage.c
View File

@ -12,6 +12,7 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/hugetlb.h>
#include <linux/export.h>
#include <linux/of_fdt.h>
#include <linux/memblock.h>
#include <linux/bootmem.h>
@ -103,6 +104,7 @@ pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, unsigned *shift
*shift = hugepd_shift(*hpdp);
return hugepte_offset(hpdp, ea, pdshift);
}
EXPORT_SYMBOL_GPL(find_linux_pte_or_hugepte);
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
{

11
arch/s390/include/asm/kvm.h
View File

@ -41,4 +41,15 @@ struct kvm_debug_exit_arch {
struct kvm_guest_debug_arch {
};
#define KVM_SYNC_PREFIX (1UL << 0)
#define KVM_SYNC_GPRS (1UL << 1)
#define KVM_SYNC_ACRS (1UL << 2)
#define KVM_SYNC_CRS (1UL << 3)
/* definition of registers in kvm_run */
struct kvm_sync_regs {
__u64 prefix; /* prefix register */
__u64 gprs[16]; /* general purpose registers */
__u32 acrs[16]; /* access registers */
__u64 crs[16]; /* control registers */
};
#endif

12
arch/s390/include/asm/kvm_host.h
View File

@ -220,18 +220,17 @@ struct kvm_s390_float_interrupt {
struct list_head list;
atomic_t active;
int next_rr_cpu;
unsigned long idle_mask [(64 + sizeof(long) - 1) / sizeof(long)];
struct kvm_s390_local_interrupt *local_int[64];
unsigned long idle_mask[(KVM_MAX_VCPUS + sizeof(long) - 1)
/ sizeof(long)];
struct kvm_s390_local_interrupt *local_int[KVM_MAX_VCPUS];
};
struct kvm_vcpu_arch {
struct kvm_s390_sie_block *sie_block;
unsigned long guest_gprs[16];
s390_fp_regs host_fpregs;
unsigned int host_acrs[NUM_ACRS];
s390_fp_regs guest_fpregs;
unsigned int guest_acrs[NUM_ACRS];
struct kvm_s390_local_interrupt local_int;
struct hrtimer ckc_timer;
struct tasklet_struct tasklet;
@ -246,6 +245,9 @@ struct kvm_vm_stat {
u32 remote_tlb_flush;
};
struct kvm_arch_memory_slot {
};
struct kvm_arch{
struct sca_block *sca;
debug_info_t *dbf;
@ -253,5 +255,5 @@ struct kvm_arch{
struct gmap *gmap;
};
extern int sie64a(struct kvm_s390_sie_block *, unsigned long *);
extern int sie64a(struct kvm_s390_sie_block *, u64 *);
#endif

9
arch/s390/kvm/Kconfig
View File

@ -34,6 +34,15 @@ config KVM
If unsure, say N.
config KVM_S390_UCONTROL
bool "Userspace controlled virtual machines"
depends on KVM
---help---
Allow CAP_SYS_ADMIN users to create KVM virtual machines that are
controlled by userspace.
If unsure, say N.
# OK, it's a little counter-intuitive to do this, but it puts it neatly under
# the virtualization menu.
source drivers/vhost/Kconfig

6
arch/s390/kvm/diag.c
View File

@ -20,8 +20,8 @@ static int diag_release_pages(struct kvm_vcpu *vcpu)
unsigned long start, end;
unsigned long prefix = vcpu->arch.sie_block->prefix;
start = vcpu->arch.guest_gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];
end = vcpu->arch.guest_gprs[vcpu->arch.sie_block->ipa & 0xf] + 4096;
start = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];
end = vcpu->run->s.regs.gprs[vcpu->arch.sie_block->ipa & 0xf] + 4096;
if (start & ~PAGE_MASK || end & ~PAGE_MASK || start > end
|| start < 2 * PAGE_SIZE)
@ -56,7 +56,7 @@ static int __diag_time_slice_end(struct kvm_vcpu *vcpu)
static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
{
unsigned int reg = vcpu->arch.sie_block->ipa & 0xf;
unsigned long subcode = vcpu->arch.guest_gprs[reg] & 0xffff;
unsigned long subcode = vcpu->run->s.regs.gprs[reg] & 0xffff;
VCPU_EVENT(vcpu, 5, "diag ipl functions, subcode %lx", subcode);
switch (subcode) {

24
arch/s390/kvm/intercept.c
View File

@ -36,7 +36,7 @@ static int handle_lctlg(struct kvm_vcpu *vcpu)
useraddr = disp2;
if (base2)
useraddr += vcpu->arch.guest_gprs[base2];
useraddr += vcpu->run->s.regs.gprs[base2];
if (useraddr & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@ -75,7 +75,7 @@ static int handle_lctl(struct kvm_vcpu *vcpu)
useraddr = disp2;
if (base2)
useraddr += vcpu->arch.guest_gprs[base2];
useraddr += vcpu->run->s.regs.gprs[base2];
if (useraddr & 3)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@ -133,13 +133,6 @@ static int handle_stop(struct kvm_vcpu *vcpu)
vcpu->stat.exit_stop_request++;
spin_lock_bh(&vcpu->arch.local_int.lock);
if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) {
vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP;
rc = kvm_s390_vcpu_store_status(vcpu,
KVM_S390_STORE_STATUS_NOADDR);
if (rc >= 0)
rc = -EOPNOTSUPP;
}
if (vcpu->arch.local_int.action_bits & ACTION_RELOADVCPU_ON_STOP) {
vcpu->arch.local_int.action_bits &= ~ACTION_RELOADVCPU_ON_STOP;
@ -155,7 +148,18 @@ static int handle_stop(struct kvm_vcpu *vcpu)
rc = -EOPNOTSUPP;
}
spin_unlock_bh(&vcpu->arch.local_int.lock);
if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) {
vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP;
/* store status must be called unlocked. Since local_int.lock
* only protects local_int.* and not guest memory we can give
* up the lock here */
spin_unlock_bh(&vcpu->arch.local_int.lock);
rc = kvm_s390_vcpu_store_status(vcpu,
KVM_S390_STORE_STATUS_NOADDR);
if (rc >= 0)
rc = -EOPNOTSUPP;
} else
spin_unlock_bh(&vcpu->arch.local_int.lock);
return rc;
}

3
arch/s390/kvm/interrupt.c
View File

@ -236,8 +236,7 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x",
inti->prefix.address);
vcpu->stat.deliver_prefix_signal++;
vcpu->arch.sie_block->prefix = inti->prefix.address;
vcpu->arch.sie_block->ihcpu = 0xffff;
kvm_s390_set_prefix(vcpu, inti->prefix.address);
break;
case KVM_S390_RESTART:

221
arch/s390/kvm/kvm-s390.c
View File

@ -129,6 +129,10 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_S390_PSW:
case KVM_CAP_S390_GMAP:
case KVM_CAP_SYNC_MMU:
#ifdef CONFIG_KVM_S390_UCONTROL
case KVM_CAP_S390_UCONTROL:
#endif
case KVM_CAP_SYNC_REGS:
r = 1;
break;
default:
@ -171,11 +175,22 @@ long kvm_arch_vm_ioctl(struct file *filp,
return r;
}
int kvm_arch_init_vm(struct kvm *kvm)
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
int rc;
char debug_name[16];
rc = -EINVAL;
#ifdef CONFIG_KVM_S390_UCONTROL
if (type & ~KVM_VM_S390_UCONTROL)
goto out_err;
if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
goto out_err;
#else
if (type)
goto out_err;
#endif
rc = s390_enable_sie();
if (rc)
goto out_err;
@ -198,10 +213,13 @@ int kvm_arch_init_vm(struct kvm *kvm)
debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
VM_EVENT(kvm, 3, "%s", "vm created");
kvm->arch.gmap = gmap_alloc(current->mm);
if (!kvm->arch.gmap)
goto out_nogmap;
if (type & KVM_VM_S390_UCONTROL) {
kvm->arch.gmap = NULL;
} else {
kvm->arch.gmap = gmap_alloc(current->mm);
if (!kvm->arch.gmap)
goto out_nogmap;
}
return 0;
out_nogmap:
debug_unregister(kvm->arch.dbf);
@ -214,11 +232,18 @@ int kvm_arch_init_vm(struct kvm *kvm)
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
{
VCPU_EVENT(vcpu, 3, "%s", "free cpu");
clear_bit(63 - vcpu->vcpu_id, (unsigned long *) &vcpu->kvm->arch.sca->mcn);
if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda ==
(__u64) vcpu->arch.sie_block)
vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0;
if (!kvm_is_ucontrol(vcpu->kvm)) {
clear_bit(63 - vcpu->vcpu_id,
(unsigned long *) &vcpu->kvm->arch.sca->mcn);
if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda ==
(__u64) vcpu->arch.sie_block)
vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0;
}
smp_mb();
if (kvm_is_ucontrol(vcpu->kvm))
gmap_free(vcpu->arch.gmap);
free_page((unsigned long)(vcpu->arch.sie_block));
kvm_vcpu_uninit(vcpu);
kfree(vcpu);
@ -249,13 +274,25 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
kvm_free_vcpus(kvm);
free_page((unsigned long)(kvm->arch.sca));
debug_unregister(kvm->arch.dbf);
gmap_free(kvm->arch.gmap);
if (!kvm_is_ucontrol(kvm))
gmap_free(kvm->arch.gmap);
}
/* Section: vcpu related */
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
if (kvm_is_ucontrol(vcpu->kvm)) {
vcpu->arch.gmap = gmap_alloc(current->mm);
if (!vcpu->arch.gmap)
return -ENOMEM;
return 0;
}
vcpu->arch.gmap = vcpu->kvm->arch.gmap;
vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
KVM_SYNC_GPRS |
KVM_SYNC_ACRS |
KVM_SYNC_CRS;
return 0;
}
@ -270,7 +307,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
save_access_regs(vcpu->arch.host_acrs);
vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK;
restore_fp_regs(&vcpu->arch.guest_fpregs);
restore_access_regs(vcpu->arch.guest_acrs);
restore_access_regs(vcpu->run->s.regs.acrs);
gmap_enable(vcpu->arch.gmap);
atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
}
@ -280,7 +317,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
gmap_disable(vcpu->arch.gmap);
save_fp_regs(&vcpu->arch.guest_fpregs);
save_access_regs(vcpu->arch.guest_acrs);
save_access_regs(vcpu->run->s.regs.acrs);
restore_fp_regs(&vcpu->arch.host_fpregs);
restore_access_regs(vcpu->arch.host_acrs);
}
@ -290,8 +327,7 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
/* this equals initial cpu reset in pop, but we don't switch to ESA */
vcpu->arch.sie_block->gpsw.mask = 0UL;
vcpu->arch.sie_block->gpsw.addr = 0UL;
vcpu->arch.sie_block->prefix = 0UL;
vcpu->arch.sie_block->ihcpu = 0xffff;
kvm_s390_set_prefix(vcpu, 0);
vcpu->arch.sie_block->cputm = 0UL;
vcpu->arch.sie_block->ckc = 0UL;
vcpu->arch.sie_block->todpr = 0;
@ -342,12 +378,19 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
goto out_free_cpu;
vcpu->arch.sie_block->icpua = id;
BUG_ON(!kvm->arch.sca);
if (!kvm->arch.sca->cpu[id].sda)
kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block;
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32);
vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca;
set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn);
if (!kvm_is_ucontrol(kvm)) {
if (!kvm->arch.sca) {
WARN_ON_ONCE(1);
goto out_free_cpu;
}
if (!kvm->arch.sca->cpu[id].sda)
kvm->arch.sca->cpu[id].sda =
(__u64) vcpu->arch.sie_block;
vcpu->arch.sie_block->scaoh =
(__u32)(((__u64)kvm->arch.sca) >> 32);
vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca;
set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn);
}
spin_lock_init(&vcpu->arch.local_int.lock);
INIT_LIST_HEAD(&vcpu->arch.local_int.list);
@ -388,29 +431,29 @@ static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
memcpy(&vcpu->arch.guest_gprs, &regs->gprs, sizeof(regs->gprs));
memcpy(&vcpu->run->s.regs.gprs, &regs->gprs, sizeof(regs->gprs));
return 0;
}
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
memcpy(&regs->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs));
memcpy(&regs->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
return 0;
}
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs));
memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
restore_access_regs(vcpu->arch.guest_acrs);
restore_access_regs(vcpu->run->s.regs.acrs);
return 0;
}
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs));
memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
return 0;
}
@ -418,7 +461,7 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs));
vcpu->arch.guest_fpregs.fpc = fpu->fpc;
vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK;
restore_fp_regs(&vcpu->arch.guest_fpregs);
return 0;
}
@ -467,9 +510,11 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
return -EINVAL; /* not implemented yet */
}
static void __vcpu_run(struct kvm_vcpu *vcpu)
static int __vcpu_run(struct kvm_vcpu *vcpu)
{
memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16);
int rc;
memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16);
if (need_resched())
schedule();
@ -477,7 +522,8 @@ static void __vcpu_run(struct kvm_vcpu *vcpu)
if (test_thread_flag(TIF_MCCK_PENDING))
s390_handle_mcck();
kvm_s390_deliver_pending_interrupts(vcpu);
if (!kvm_is_ucontrol(vcpu->kvm))
kvm_s390_deliver_pending_interrupts(vcpu);
vcpu->arch.sie_block->icptcode = 0;
local_irq_disable();
@ -485,9 +531,15 @@ static void __vcpu_run(struct kvm_vcpu *vcpu)
local_irq_enable();
VCPU_EVENT(vcpu, 6, "entering sie flags %x",
atomic_read(&vcpu->arch.sie_block->cpuflags));
if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) {
VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
rc = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs);
if (rc) {
if (kvm_is_ucontrol(vcpu->kvm)) {
rc = SIE_INTERCEPT_UCONTROL;
} else {
VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
rc = 0;
}
}
VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
vcpu->arch.sie_block->icptcode);
@ -495,7 +547,8 @@ static void __vcpu_run(struct kvm_vcpu *vcpu)
kvm_guest_exit();
local_irq_enable();
memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16);
memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16);
return rc;
}
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
@ -516,6 +569,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
case KVM_EXIT_UNKNOWN:
case KVM_EXIT_INTR:
case KVM_EXIT_S390_RESET:
case KVM_EXIT_S390_UCONTROL:
break;
default:
BUG();
@ -523,12 +577,26 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) {
kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX;
kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
}
if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS;
memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
}
might_fault();
do {
__vcpu_run(vcpu);
rc = kvm_handle_sie_intercept(vcpu);
rc = __vcpu_run(vcpu);
if (rc)
break;
if (kvm_is_ucontrol(vcpu->kvm))
rc = -EOPNOTSUPP;
else
rc = kvm_handle_sie_intercept(vcpu);
} while (!signal_pending(current) && !rc);
if (rc == SIE_INTERCEPT_RERUNVCPU)
@ -539,6 +607,16 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
rc = -EINTR;
}
#ifdef CONFIG_KVM_S390_UCONTROL
if (rc == SIE_INTERCEPT_UCONTROL) {
kvm_run->exit_reason = KVM_EXIT_S390_UCONTROL;
kvm_run->s390_ucontrol.trans_exc_code =
current->thread.gmap_addr;
kvm_run->s390_ucontrol.pgm_code = 0x10;
rc = 0;
}
#endif
if (rc == -EOPNOTSUPP) {
/* intercept cannot be handled in-kernel, prepare kvm-run */
kvm_run->exit_reason = KVM_EXIT_S390_SIEIC;
@ -556,6 +634,8 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix;
memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
@ -602,7 +682,7 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs),
vcpu->arch.guest_gprs, 128, prefix))
vcpu->run->s.regs.gprs, 128, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw),
@ -631,7 +711,7 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs),
&vcpu->arch.guest_acrs, 64, prefix))
&vcpu->run->s.regs.acrs, 64, prefix))
return -EFAULT;
if (__guestcopy(vcpu,
@ -673,12 +753,77 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
case KVM_S390_INITIAL_RESET:
r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
break;
#ifdef CONFIG_KVM_S390_UCONTROL
case KVM_S390_UCAS_MAP: {
struct kvm_s390_ucas_mapping ucasmap;
if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
r = -EFAULT;
break;
}
if (!kvm_is_ucontrol(vcpu->kvm)) {
r = -EINVAL;
break;
}
r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
ucasmap.vcpu_addr, ucasmap.length);
break;
}
case KVM_S390_UCAS_UNMAP: {
struct kvm_s390_ucas_mapping ucasmap;
if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
r = -EFAULT;
break;
}
if (!kvm_is_ucontrol(vcpu->kvm)) {
r = -EINVAL;
break;
}
r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
ucasmap.length);
break;
}
#endif
case KVM_S390_VCPU_FAULT: {
r = gmap_fault(arg, vcpu->arch.gmap);
if (!IS_ERR_VALUE(r))
r = 0;
break;
}
default:
r = -EINVAL;
r = -ENOTTY;
}
return r;
}
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
#ifdef CONFIG_KVM_S390_UCONTROL
if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
&& (kvm_is_ucontrol(vcpu->kvm))) {
vmf->page = virt_to_page(vcpu->arch.sie_block);
get_page(vmf->page);
return 0;
}
#endif
return VM_FAULT_SIGBUS;
}
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
}
int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
{
return 0;
}
/* Section: memory related */
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,

18
arch/s390/kvm/kvm-s390.h
View File

@ -26,6 +26,7 @@ typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
/* negativ values are error codes, positive values for internal conditions */
#define SIE_INTERCEPT_RERUNVCPU (1<<0)
#define SIE_INTERCEPT_UCONTROL (1<<1)
int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
@ -47,6 +48,23 @@ static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
}
static inline int kvm_is_ucontrol(struct kvm *kvm)
{
#ifdef CONFIG_KVM_S390_UCONTROL
if (kvm->arch.gmap)
return 0;
return 1;
#else
return 0;
#endif
}
static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
{
vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u;
vcpu->arch.sie_block->ihcpu = 0xffff;
}
int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
void kvm_s390_tasklet(unsigned long parm);

27
arch/s390/kvm/priv.c
View File

@ -33,7 +33,7 @@ static int handle_set_prefix(struct kvm_vcpu *vcpu)
operand2 = disp2;
if (base2)
operand2 += vcpu->arch.guest_gprs[base2];
operand2 += vcpu->run->s.regs.gprs[base2];
/* must be word boundary */
if (operand2 & 3) {
@ -56,8 +56,7 @@ static int handle_set_prefix(struct kvm_vcpu *vcpu)
goto out;
}
vcpu->arch.sie_block->prefix = address;
vcpu->arch.sie_block->ihcpu = 0xffff;
kvm_s390_set_prefix(vcpu, address);
VCPU_EVENT(vcpu, 5, "setting prefix to %x", address);
out:
@ -74,7 +73,7 @@ static int handle_store_prefix(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_stpx++;
operand2 = disp2;
if (base2)
operand2 += vcpu->arch.guest_gprs[base2];
operand2 += vcpu->run->s.regs.gprs[base2];
/* must be word boundary */
if (operand2 & 3) {
@ -106,7 +105,7 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_stap++;
useraddr = disp2;
if (base2)
useraddr += vcpu->arch.guest_gprs[base2];
useraddr += vcpu->run->s.regs.gprs[base2];
if (useraddr & 1) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@ -181,7 +180,7 @@ static int handle_stidp(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_stidp++;
operand2 = disp2;
if (base2)
operand2 += vcpu->arch.guest_gprs[base2];
operand2 += vcpu->run->s.regs.gprs[base2];
if (operand2 & 7) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@ -232,9 +231,9 @@ static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
static int handle_stsi(struct kvm_vcpu *vcpu)
{
int fc = (vcpu->arch.guest_gprs[0] & 0xf0000000) >> 28;
int sel1 = vcpu->arch.guest_gprs[0] & 0xff;
int sel2 = vcpu->arch.guest_gprs[1] & 0xffff;
int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
int base2 = vcpu->arch.sie_block->ipb >> 28;
int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
u64 operand2;
@ -245,14 +244,14 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
operand2 = disp2;
if (base2)
operand2 += vcpu->arch.guest_gprs[base2];
operand2 += vcpu->run->s.regs.gprs[base2];
if (operand2 & 0xfff && fc > 0)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
switch (fc) {
case 0:
vcpu->arch.guest_gprs[0] = 3 << 28;
vcpu->run->s.regs.gprs[0] = 3 << 28;
vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
return 0;
case 1: /* same handling for 1 and 2 */
@ -281,7 +280,7 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
}
free_page(mem);
vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
vcpu->arch.guest_gprs[0] = 0;
vcpu->run->s.regs.gprs[0] = 0;
return 0;
out_mem:
free_page(mem);
@ -333,8 +332,8 @@ static int handle_tprot(struct kvm_vcpu *vcpu)
int disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
int base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
int disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
u64 address1 = disp1 + base1 ? vcpu->arch.guest_gprs[base1] : 0;
u64 address2 = disp2 + base2 ? vcpu->arch.guest_gprs[base2] : 0;
u64 address1 = disp1 + base1 ? vcpu->run->s.regs.gprs[base1] : 0;
u64 address2 = disp2 + base2 ? vcpu->run->s.regs.gprs[base2] : 0;
struct vm_area_struct *vma;
unsigned long user_address;

57
arch/s390/kvm/sigp.c
View File

@ -48,7 +48,7 @@
static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
unsigned long *reg)
u64 *reg)
{
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
int rc;
@ -160,12 +160,15 @@ static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
inti->type = KVM_S390_SIGP_STOP;
spin_lock_bh(&li->lock);
if ((atomic_read(li->cpuflags) & CPUSTAT_STOPPED))
goto out;
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
li->action_bits |= action;
if (waitqueue_active(&li->wq))
wake_up_interruptible(&li->wq);
out:
spin_unlock_bh(&li->lock);
return 0; /* order accepted */
@ -220,7 +223,7 @@ static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
}
static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
unsigned long *reg)
u64 *reg)
{
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
struct kvm_s390_local_interrupt *li = NULL;
@ -278,7 +281,7 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
}
static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr,
unsigned long *reg)
u64 *reg)
{
int rc;
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
@ -309,6 +312,34 @@ static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr,
return rc;
}
static int __sigp_restart(struct kvm_vcpu *vcpu, u16 cpu_addr)
{
int rc = 0;
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
struct kvm_s390_local_interrupt *li;
if (cpu_addr >= KVM_MAX_VCPUS)
return 3; /* not operational */
spin_lock(&fi->lock);
li = fi->local_int[cpu_addr];
if (li == NULL) {
rc = 3; /* not operational */
goto out;
}
spin_lock_bh(&li->lock);
if (li->action_bits & ACTION_STOP_ON_STOP)
rc = 2; /* busy */
else
VCPU_EVENT(vcpu, 4, "sigp restart %x to handle userspace",
cpu_addr);
spin_unlock_bh(&li->lock);
out:
spin_unlock(&fi->lock);
return rc;
}
int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
{
int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
@ -316,7 +347,7 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
int base2 = vcpu->arch.sie_block->ipb >> 28;
int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
u32 parameter;
u16 cpu_addr = vcpu->arch.guest_gprs[r3];
u16 cpu_addr = vcpu->run->s.regs.gprs[r3];
u8 order_code;
int rc;
@ -327,18 +358,18 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
order_code = disp2;
if (base2)
order_code += vcpu->arch.guest_gprs[base2];
order_code += vcpu->run->s.regs.gprs[base2];
if (r1 % 2)
parameter = vcpu->arch.guest_gprs[r1];
parameter = vcpu->run->s.regs.gprs[r1];
else
parameter = vcpu->arch.guest_gprs[r1 + 1];
parameter = vcpu->run->s.regs.gprs[r1 + 1];
switch (order_code) {
case SIGP_SENSE:
vcpu->stat.instruction_sigp_sense++;
rc = __sigp_sense(vcpu, cpu_addr,
&vcpu->arch.guest_gprs[r1]);
&vcpu->run->s.regs.gprs[r1]);
break;
case SIGP_EXTERNAL_CALL:
vcpu->stat.instruction_sigp_external_call++;
@ -354,7 +385,8 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
break;
case SIGP_STOP_STORE_STATUS:
vcpu->stat.instruction_sigp_stop++;
rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP);
rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP |
ACTION_STOP_ON_STOP);
break;
case SIGP_SET_ARCH:
vcpu->stat.instruction_sigp_arch++;
@ -363,15 +395,18 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
case SIGP_SET_PREFIX:
vcpu->stat.instruction_sigp_prefix++;
rc = __sigp_set_prefix(vcpu, cpu_addr, parameter,
&vcpu->arch.guest_gprs[r1]);
&vcpu->run->s.regs.gprs[r1]);
break;
case SIGP_SENSE_RUNNING:
vcpu->stat.instruction_sigp_sense_running++;
rc = __sigp_sense_running(vcpu, cpu_addr,
&vcpu->arch.guest_gprs[r1]);
&vcpu->run->s.regs.gprs[r1]);
break;
case SIGP_RESTART:
vcpu->stat.instruction_sigp_restart++;
rc = __sigp_restart(vcpu, cpu_addr);
if (rc == 2) /* busy */
break;
/* user space must know about restart */
default:
return -EOPNOTSUPP;

4
arch/x86/include/asm/kvm.h
View File

@ -321,4 +321,8 @@ struct kvm_xcrs {
__u64 padding[16];
};
/* definition of registers in kvm_run */
struct kvm_sync_regs {
};
#endif /* _ASM_X86_KVM_H */

3
arch/x86/include/asm/kvm_emulate.h
View File

@ -176,6 +176,7 @@ struct x86_emulate_ops {
void (*set_idt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt);
ulong (*get_cr)(struct x86_emulate_ctxt *ctxt, int cr);
int (*set_cr)(struct x86_emulate_ctxt *ctxt, int cr, ulong val);
void (*set_rflags)(struct x86_emulate_ctxt *ctxt, ulong val);
int (*cpl)(struct x86_emulate_ctxt *ctxt);
int (*get_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong *dest);
int (*set_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong value);
@ -388,7 +389,7 @@ bool x86_page_table_writing_insn(struct x86_emulate_ctxt *ctxt);
#define EMULATION_INTERCEPTED 2
int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
u16 tss_selector, int reason,
u16 tss_selector, int idt_index, int reason,
bool has_error_code, u32 error_code);
int emulate_int_real(struct x86_emulate_ctxt *ctxt, int irq);
#endif /* _ASM_X86_KVM_X86_EMULATE_H */

63
arch/x86/include/asm/kvm_host.h
View File

@ -29,7 +29,7 @@
#include <asm/msr-index.h>
#define KVM_MAX_VCPUS 254
#define KVM_SOFT_MAX_VCPUS 64
#define KVM_SOFT_MAX_VCPUS 160
#define KVM_MEMORY_SLOTS 32
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 4
@ -181,13 +181,6 @@ struct kvm_mmu_memory_cache {
void *objects[KVM_NR_MEM_OBJS];
};
#define NR_PTE_CHAIN_ENTRIES 5
struct kvm_pte_chain {
u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
struct hlist_node link;
};
/*
* kvm_mmu_page_role, below, is defined as:
*
@ -427,12 +420,16 @@ struct kvm_vcpu_arch {
u64 last_guest_tsc;
u64 last_kernel_ns;
u64 last_tsc_nsec;
u64 last_tsc_write;
u32 virtual_tsc_khz;
u64 last_host_tsc;
u64 tsc_offset_adjustment;
u64 this_tsc_nsec;
u64 this_tsc_write;
u8 this_tsc_generation;
bool tsc_catchup;
u32 tsc_catchup_mult;
s8 tsc_catchup_shift;
bool tsc_always_catchup;
s8 virtual_tsc_shift;
u32 virtual_tsc_mult;
u32 virtual_tsc_khz;
atomic_t nmi_queued; /* unprocessed asynchronous NMIs */
unsigned nmi_pending; /* NMI queued after currently running handler */
@ -478,6 +475,21 @@ struct kvm_vcpu_arch {
u32 id;
bool send_user_only;
} apf;
/* OSVW MSRs (AMD only) */
struct {
u64 length;
u64 status;
} osvw;
};
struct kvm_lpage_info {
unsigned long rmap_pde;
int write_count;
};
struct kvm_arch_memory_slot {
struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
};
struct kvm_arch {
@ -511,8 +523,12 @@ struct kvm_arch {
s64 kvmclock_offset;
raw_spinlock_t tsc_write_lock;
u64 last_tsc_nsec;
u64 last_tsc_offset;
u64 last_tsc_write;
u32 last_tsc_khz;
u64 cur_tsc_nsec;
u64 cur_tsc_write;
u64 cur_tsc_offset;
u8 cur_tsc_generation;
struct kvm_xen_hvm_config xen_hvm_config;
@ -644,7 +660,7 @@ struct kvm_x86_ops {
u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
int (*get_lpage_level)(void);
bool (*rdtscp_supported)(void);
void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment);
void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment, bool host);
void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
@ -652,7 +668,7 @@ struct kvm_x86_ops {
bool (*has_wbinvd_exit)(void);
void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz);
void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale);
void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
u64 (*compute_tsc_offset)(struct kvm_vcpu *vcpu, u64 target_tsc);
@ -674,6 +690,17 @@ struct kvm_arch_async_pf {
extern struct kvm_x86_ops *kvm_x86_ops;
static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu,
s64 adjustment)
{
kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, false);
}
static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment)
{
kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, true);
}
int kvm_mmu_module_init(void);
void kvm_mmu_module_exit(void);
@ -741,8 +768,8 @@ int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
bool has_error_code, u32 error_code);
int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
int reason, bool has_error_code, u32 error_code);
int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);

1
arch/x86/include/asm/perf_event.h
View File

@ -23,6 +23,7 @@
#define ARCH_PERFMON_EVENTSEL_USR (1ULL << 16)
#define ARCH_PERFMON_EVENTSEL_OS (1ULL << 17)
#define ARCH_PERFMON_EVENTSEL_EDGE (1ULL << 18)
#define ARCH_PERFMON_EVENTSEL_PIN_CONTROL (1ULL << 19)
#define ARCH_PERFMON_EVENTSEL_INT (1ULL << 20)
#define ARCH_PERFMON_EVENTSEL_ANY (1ULL << 21)
#define ARCH_PERFMON_EVENTSEL_ENABLE (1ULL << 22)

4
arch/x86/include/asm/tsc.h
View File

@ -61,7 +61,7 @@ extern void check_tsc_sync_source(int cpu);
extern void check_tsc_sync_target(void);
extern int notsc_setup(char *);
extern void save_sched_clock_state(void);
extern void restore_sched_clock_state(void);
extern void tsc_save_sched_clock_state(void);
extern void tsc_restore_sched_clock_state(void);
#endif /* _ASM_X86_TSC_H */

6
arch/x86/include/asm/x86_init.h
View File

@ -145,9 +145,11 @@ struct x86_init_ops {
/**
* struct x86_cpuinit_ops - platform specific cpu hotplug setups
* @setup_percpu_clockev: set up the per cpu clock event device
* @early_percpu_clock_init: early init of the per cpu clock event device
*/
struct x86_cpuinit_ops {
void (*setup_percpu_clockev)(void);
void (*early_percpu_clock_init)(void);
void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node);
};
@ -160,6 +162,8 @@ struct x86_cpuinit_ops {
* @is_untracked_pat_range exclude from PAT logic
* @nmi_init enable NMI on cpus
* @i8042_detect pre-detect if i8042 controller exists
* @save_sched_clock_state: save state for sched_clock() on suspend
* @restore_sched_clock_state: restore state for sched_clock() on resume
*/
struct x86_platform_ops {
unsigned long (*calibrate_tsc)(void);
@ -171,6 +175,8 @@ struct x86_platform_ops {
void (*nmi_init)(void);
unsigned char (*get_nmi_reason)(void);
int (*i8042_detect)(void);
void (*save_sched_clock_state)(void);
void (*restore_sched_clock_state)(void);
};
struct pci_dev;

15
arch/x86/kernel/kvmclock.c
View File

@ -136,6 +136,15 @@ int kvm_register_clock(char *txt)
return ret;
}
static void kvm_save_sched_clock_state(void)
{
}
static void kvm_restore_sched_clock_state(void)
{
kvm_register_clock("primary cpu clock, resume");
}
#ifdef CONFIG_X86_LOCAL_APIC
static void __cpuinit kvm_setup_secondary_clock(void)
{
@ -144,8 +153,6 @@ static void __cpuinit kvm_setup_secondary_clock(void)
* we shouldn't fail.
*/
WARN_ON(kvm_register_clock("secondary cpu clock"));
/* ok, done with our trickery, call native */
setup_secondary_APIC_clock();
}
#endif
@ -194,9 +201,11 @@ void __init kvmclock_init(void)
x86_platform.get_wallclock = kvm_get_wallclock;
x86_platform.set_wallclock = kvm_set_wallclock;
#ifdef CONFIG_X86_LOCAL_APIC
x86_cpuinit.setup_percpu_clockev =
x86_cpuinit.early_percpu_clock_init =
kvm_setup_secondary_clock;
#endif
x86_platform.save_sched_clock_state = kvm_save_sched_clock_state;
x86_platform.restore_sched_clock_state = kvm_restore_sched_clock_state;
machine_ops.shutdown = kvm_shutdown;
#ifdef CONFIG_KEXEC
machine_ops.crash_shutdown = kvm_crash_shutdown;

1
arch/x86/kernel/smpboot.c
View File

@ -255,6 +255,7 @@ notrace static void __cpuinit start_secondary(void *unused)
* most necessary things.
*/
cpu_init();
x86_cpuinit.early_percpu_clock_init();
preempt_disable();
smp_callin();

4
arch/x86/kernel/tsc.c
View File

@ -630,7 +630,7 @@ static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
static unsigned long long cyc2ns_suspend;
void save_sched_clock_state(void)
void tsc_save_sched_clock_state(void)
{
if (!sched_clock_stable)
return;
@ -646,7 +646,7 @@ void save_sched_clock_state(void)
* that sched_clock() continues from the point where it was left off during
* suspend.
*/
void restore_sched_clock_state(void)
void tsc_restore_sched_clock_state(void)
{
unsigned long long offset;
unsigned long flags;

5
arch/x86/kernel/x86_init.c
View File

@ -91,6 +91,7 @@ struct x86_init_ops x86_init __initdata = {
};
struct x86_cpuinit_ops x86_cpuinit __cpuinitdata = {
.early_percpu_clock_init = x86_init_noop,
.setup_percpu_clockev = setup_secondary_APIC_clock,
.fixup_cpu_id = x86_default_fixup_cpu_id,
};
@ -107,7 +108,9 @@ struct x86_platform_ops x86_platform = {
.is_untracked_pat_range = is_ISA_range,
.nmi_init = default_nmi_init,
.get_nmi_reason = default_get_nmi_reason,
.i8042_detect = default_i8042_detect
.i8042_detect = default_i8042_detect,
.save_sched_clock_state = tsc_save_sched_clock_state,
.restore_sched_clock_state = tsc_restore_sched_clock_state,
};
EXPORT_SYMBOL_GPL(x86_platform);

2
arch/x86/kvm/cpuid.c
View File

@ -236,7 +236,7 @@ static int do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
const u32 kvm_supported_word6_x86_features =
F(LAHF_LM) | F(CMP_LEGACY) | 0 /*SVM*/ | 0 /* ExtApicSpace */ |
F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) |
F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP) |
F(3DNOWPREFETCH) | F(OSVW) | 0 /* IBS */ | F(XOP) |
0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM);
/* cpuid 0xC0000001.edx */

8
arch/x86/kvm/cpuid.h
View File

@ -43,4 +43,12 @@ static inline bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu)
return best && (best->ebx & bit(X86_FEATURE_FSGSBASE));
}
static inline bool guest_cpuid_has_osvw(struct kvm_vcpu *vcpu)
{
struct kvm_cpuid_entry2 *best;
best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
return best && (best->ecx & bit(X86_FEATURE_OSVW));
}
#endif

112
arch/x86/kvm/emulate.c
View File

@ -57,6 +57,7 @@
#define OpDS 23ull /* DS */
#define OpFS 24ull /* FS */
#define OpGS 25ull /* GS */
#define OpMem8 26ull /* 8-bit zero extended memory operand */
#define OpBits 5 /* Width of operand field */
#define OpMask ((1ull << OpBits) - 1)
@ -101,6 +102,7 @@
#define SrcAcc (OpAcc << SrcShift)
#define SrcImmU16 (OpImmU16 << SrcShift)
#define SrcDX (OpDX << SrcShift)
#define SrcMem8 (OpMem8 << SrcShift)
#define SrcMask (OpMask << SrcShift)
#define BitOp (1<<11)
#define MemAbs (1<<12) /* Memory operand is absolute displacement */
@ -858,8 +860,7 @@ static void write_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data,
}
static void decode_register_operand(struct x86_emulate_ctxt *ctxt,
struct operand *op,
int inhibit_bytereg)
struct operand *op)
{
unsigned reg = ctxt->modrm_reg;
int highbyte_regs = ctxt->rex_prefix == 0;
@ -876,7 +877,7 @@ static void decode_register_operand(struct x86_emulate_ctxt *ctxt,
}
op->type = OP_REG;
if ((ctxt->d & ByteOp) && !inhibit_bytereg) {
if (ctxt->d & ByteOp) {
op->addr.reg = decode_register(reg, ctxt->regs, highbyte_regs);
op->bytes = 1;
} else {
@ -1151,6 +1152,22 @@ static int pio_in_emulated(struct x86_emulate_ctxt *ctxt,
return 1;
}
static int read_interrupt_descriptor(struct x86_emulate_ctxt *ctxt,
u16 index, struct desc_struct *desc)
{
struct desc_ptr dt;
ulong addr;
ctxt->ops->get_idt(ctxt, &dt);
if (dt.size < index * 8 + 7)
return emulate_gp(ctxt, index << 3 | 0x2);
addr = dt.address + index * 8;
return ctxt->ops->read_std(ctxt, addr, desc, sizeof *desc,
&ctxt->exception);
}
static void get_descriptor_table_ptr(struct x86_emulate_ctxt *ctxt,
u16 selector, struct desc_ptr *dt)
{
@ -1227,6 +1244,8 @@ static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt,
seg_desc.type = 3;
seg_desc.p = 1;
seg_desc.s = 1;
if (ctxt->mode == X86EMUL_MODE_VM86)
seg_desc.dpl = 3;
goto load;
}
@ -1891,6 +1910,17 @@ setup_syscalls_segments(struct x86_emulate_ctxt *ctxt,
ss->p = 1;
}
static bool vendor_intel(struct x86_emulate_ctxt *ctxt)
{
u32 eax, ebx, ecx, edx;
eax = ecx = 0;
return ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx)
&& ebx == X86EMUL_CPUID_VENDOR_GenuineIntel_ebx
&& ecx == X86EMUL_CPUID_VENDOR_GenuineIntel_ecx
&& edx == X86EMUL_CPUID_VENDOR_GenuineIntel_edx;
}
static bool em_syscall_is_enabled(struct x86_emulate_ctxt *ctxt)
{
struct x86_emulate_ops *ops = ctxt->ops;
@ -2007,6 +2037,14 @@ static int em_sysenter(struct x86_emulate_ctxt *ctxt)
if (ctxt->mode == X86EMUL_MODE_REAL)
return emulate_gp(ctxt, 0);
/*
* Not recognized on AMD in compat mode (but is recognized in legacy
* mode).
*/
if ((ctxt->mode == X86EMUL_MODE_PROT32) && (efer & EFER_LMA)
&& !vendor_intel(ctxt))
return emulate_ud(ctxt);
/* XXX sysenter/sysexit have not been tested in 64bit mode.
* Therefore, we inject an #UD.
*/
@ -2306,6 +2344,8 @@ static int load_state_from_tss32(struct x86_emulate_ctxt *ctxt,
return emulate_gp(ctxt, 0);
ctxt->_eip = tss->eip;
ctxt->eflags = tss->eflags | 2;
/* General purpose registers */
ctxt->regs[VCPU_REGS_RAX] = tss->eax;
ctxt->regs[VCPU_REGS_RCX] = tss->ecx;
ctxt->regs[VCPU_REGS_RDX] = tss->edx;
@ -2327,6 +2367,24 @@ static int load_state_from_tss32(struct x86_emulate_ctxt *ctxt,
set_segment_selector(ctxt, tss->fs, VCPU_SREG_FS);
set_segment_selector(ctxt, tss->gs, VCPU_SREG_GS);
/*
* If we're switching between Protected Mode and VM86, we need to make
* sure to update the mode before loading the segment descriptors so
* that the selectors are interpreted correctly.
*
* Need to get rflags to the vcpu struct immediately because it
* influences the CPL which is checked at least when loading the segment
* descriptors and when pushing an error code to the new kernel stack.
*
* TODO Introduce a separate ctxt->ops->set_cpl callback
*/
if (ctxt->eflags & X86_EFLAGS_VM)
ctxt->mode = X86EMUL_MODE_VM86;
else
ctxt->mode = X86EMUL_MODE_PROT32;
ctxt->ops->set_rflags(ctxt, ctxt->eflags);
/*
* Now load segment descriptors. If fault happenes at this stage
* it is handled in a context of new task
@ -2401,7 +2459,7 @@ static int task_switch_32(struct x86_emulate_ctxt *ctxt,
}
static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt,
u16 tss_selector, int reason,
u16 tss_selector, int idt_index, int reason,
bool has_error_code, u32 error_code)
{
struct x86_emulate_ops *ops = ctxt->ops;
@ -2423,12 +2481,35 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt,
/* FIXME: check that next_tss_desc is tss */
if (reason != TASK_SWITCH_IRET) {
if ((tss_selector & 3) > next_tss_desc.dpl ||
ops->cpl(ctxt) > next_tss_desc.dpl)
return emulate_gp(ctxt, 0);
/*
* Check privileges. The three cases are task switch caused by...
*
* 1. jmp/call/int to task gate: Check against DPL of the task gate
* 2. Exception/IRQ/iret: No check is performed
* 3. jmp/call to TSS: Check agains DPL of the TSS
*/
if (reason == TASK_SWITCH_GATE) {
if (idt_index != -1) {
/* Software interrupts */
struct desc_struct task_gate_desc;
int dpl;
ret = read_interrupt_descriptor(ctxt, idt_index,
&task_gate_desc);
if (ret != X86EMUL_CONTINUE)
return ret;
dpl = task_gate_desc.dpl;
if ((tss_selector & 3) > dpl || ops->cpl(ctxt) > dpl)
return emulate_gp(ctxt, (idt_index << 3) | 0x2);
}
} else if (reason != TASK_SWITCH_IRET) {
int dpl = next_tss_desc.dpl;
if ((tss_selector & 3) > dpl || ops->cpl(ctxt) > dpl)
return emulate_gp(ctxt, tss_selector);
}
desc_limit = desc_limit_scaled(&next_tss_desc);
if (!next_tss_desc.p ||
((desc_limit < 0x67 && (next_tss_desc.type & 8)) ||
@ -2481,7 +2562,7 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt,
}
int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
u16 tss_selector, int reason,
u16 tss_selector, int idt_index, int reason,
bool has_error_code, u32 error_code)
{
int rc;
@ -2489,7 +2570,7 @@ int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
ctxt->_eip = ctxt->eip;
ctxt->dst.type = OP_NONE;
rc = emulator_do_task_switch(ctxt, tss_selector, reason,
rc = emulator_do_task_switch(ctxt, tss_selector, idt_index, reason,
has_error_code, error_code);
if (rc == X86EMUL_CONTINUE)
@ -3514,13 +3595,13 @@ static struct opcode twobyte_table[256] = {
I(DstMem | SrcReg | ModRM | BitOp | Lock, em_btr),
I(DstReg | SrcMemFAddr | ModRM | Src2FS, em_lseg),
I(DstReg | SrcMemFAddr | ModRM | Src2GS, em_lseg),
D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
D(DstReg | SrcMem8 | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
/* 0xB8 - 0xBF */
N, N,
G(BitOp, group8),
I(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable, em_btc),
I(DstReg | SrcMem | ModRM, em_bsf), I(DstReg | SrcMem | ModRM, em_bsr),
D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
D(DstReg | SrcMem8 | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
/* 0xC0 - 0xCF */
D2bv(DstMem | SrcReg | ModRM | Lock),
N, D(DstMem | SrcReg | ModRM | Mov),
@ -3602,9 +3683,7 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op,
switch (d) {
case OpReg:
decode_register_operand(ctxt, op,
op == &ctxt->dst &&
ctxt->twobyte && (ctxt->b == 0xb6 || ctxt->b == 0xb7));
decode_register_operand(ctxt, op);
break;
case OpImmUByte:
rc = decode_imm(ctxt, op, 1, false);
@ -3656,6 +3735,9 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op,
case OpImm:
rc = decode_imm(ctxt, op, imm_size(ctxt), true);
break;
case OpMem8:
ctxt->memop.bytes = 1;
goto mem_common;
case OpMem16:
ctxt->memop.bytes = 2;
goto mem_common;

1
arch/x86/kvm/i8259.c
View File

@ -307,6 +307,7 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
if (val & 0x10) {
s->init4 = val & 1;
s->last_irr = 0;
s->irr &= s->elcr;
s->imr = 0;
s->priority_add = 0;
s->special_mask = 0;

4
arch/x86/kvm/lapic.c
View File

@ -433,7 +433,7 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
break;
case APIC_DM_INIT:
if (level) {
if (!trig_mode || level) {
result = 1;
vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED;
kvm_make_request(KVM_REQ_EVENT, vcpu);
@ -731,7 +731,7 @@ static void start_apic_timer(struct kvm_lapic *apic)
u64 guest_tsc, tscdeadline = apic->lapic_timer.tscdeadline;
u64 ns = 0;
struct kvm_vcpu *vcpu = apic->vcpu;
unsigned long this_tsc_khz = vcpu_tsc_khz(vcpu);
unsigned long this_tsc_khz = vcpu->arch.virtual_tsc_khz;
unsigned long flags;
if (unlikely(!tscdeadline || !this_tsc_khz))

85
arch/x86/kvm/mmu.c
View File

@ -688,9 +688,8 @@ static struct kvm_lpage_info *lpage_info_slot(gfn_t gfn,
{
unsigned long idx;
idx = (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
(slot->base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
return &slot->lpage_info[level - 2][idx];
idx = gfn_to_index(gfn, slot->base_gfn, level);
return &slot->arch.lpage_info[level - 2][idx];
}
static void account_shadowed(struct kvm *kvm, gfn_t gfn)
@ -946,7 +945,7 @@ static void pte_list_walk(unsigned long *pte_list, pte_list_walk_fn fn)
}
}
static unsigned long *__gfn_to_rmap(struct kvm *kvm, gfn_t gfn, int level,
static unsigned long *__gfn_to_rmap(gfn_t gfn, int level,
struct kvm_memory_slot *slot)
{
struct kvm_lpage_info *linfo;
@ -966,7 +965,7 @@ static unsigned long *gfn_to_rmap(struct kvm *kvm, gfn_t gfn, int level)
struct kvm_memory_slot *slot;
slot = gfn_to_memslot(kvm, gfn);
return __gfn_to_rmap(kvm, gfn, level, slot);
return __gfn_to_rmap(gfn, level, slot);
}
static bool rmap_can_add(struct kvm_vcpu *vcpu)
@ -988,7 +987,7 @@ static int rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn)
return pte_list_add(vcpu, spte, rmapp);
}
static u64 *rmap_next(struct kvm *kvm, unsigned long *rmapp, u64 *spte)
static u64 *rmap_next(unsigned long *rmapp, u64 *spte)
{
return pte_list_next(rmapp, spte);
}
@ -1018,8 +1017,8 @@ int kvm_mmu_rmap_write_protect(struct kvm *kvm, u64 gfn,
u64 *spte;
int i, write_protected = 0;
rmapp = __gfn_to_rmap(kvm, gfn, PT_PAGE_TABLE_LEVEL, slot);
spte = rmap_next(kvm, rmapp, NULL);
rmapp = __gfn_to_rmap(gfn, PT_PAGE_TABLE_LEVEL, slot);
spte = rmap_next(rmapp, NULL);
while (spte) {
BUG_ON(!(*spte & PT_PRESENT_MASK));
rmap_printk("rmap_write_protect: spte %p %llx\n", spte, *spte);
@ -1027,14 +1026,14 @@ int kvm_mmu_rmap_write_protect(struct kvm *kvm, u64 gfn,
mmu_spte_update(spte, *spte & ~PT_WRITABLE_MASK);
write_protected = 1;
}
spte = rmap_next(kvm, rmapp, spte);
spte = rmap_next(rmapp, spte);
}
/* check for huge page mappings */
for (i = PT_DIRECTORY_LEVEL;
i < PT_PAGE_TABLE_LEVEL + KVM_NR_PAGE_SIZES; ++i) {
rmapp = __gfn_to_rmap(kvm, gfn, i, slot);
spte = rmap_next(kvm, rmapp, NULL);
rmapp = __gfn_to_rmap(gfn, i, slot);
spte = rmap_next(rmapp, NULL);
while (spte) {
BUG_ON(!(*spte & PT_PRESENT_MASK));
BUG_ON(!is_large_pte(*spte));
@ -1045,7 +1044,7 @@ int kvm_mmu_rmap_write_protect(struct kvm *kvm, u64 gfn,
spte = NULL;
write_protected = 1;
}
spte = rmap_next(kvm, rmapp, spte);
spte = rmap_next(rmapp, spte);
}
}
@ -1066,7 +1065,7 @@ static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp,
u64 *spte;
int need_tlb_flush = 0;
while ((spte = rmap_next(kvm, rmapp, NULL))) {
while ((spte = rmap_next(rmapp, NULL))) {
BUG_ON(!(*spte & PT_PRESENT_MASK));
rmap_printk("kvm_rmap_unmap_hva: spte %p %llx\n", spte, *spte);
drop_spte(kvm, spte);
@ -1085,14 +1084,14 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, unsigned long *rmapp,
WARN_ON(pte_huge(*ptep));
new_pfn = pte_pfn(*ptep);
spte = rmap_next(kvm, rmapp, NULL);
spte = rmap_next(rmapp, NULL);
while (spte) {
BUG_ON(!is_shadow_present_pte(*spte));
rmap_printk("kvm_set_pte_rmapp: spte %p %llx\n", spte, *spte);
need_flush = 1;
if (pte_write(*ptep)) {
drop_spte(kvm, spte);
spte = rmap_next(kvm, rmapp, NULL);
spte = rmap_next(rmapp, NULL);
} else {
new_spte = *spte &~ (PT64_BASE_ADDR_MASK);
new_spte |= (u64)new_pfn << PAGE_SHIFT;
@ -1102,7 +1101,7 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, unsigned long *rmapp,
new_spte &= ~shadow_accessed_mask;
mmu_spte_clear_track_bits(spte);
mmu_spte_set(spte, new_spte);
spte = rmap_next(kvm, rmapp, spte);
spte = rmap_next(rmapp, spte);
}
}
if (need_flush)
@ -1176,7 +1175,7 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp,
if (!shadow_accessed_mask)
return kvm_unmap_rmapp(kvm, rmapp, data);
spte = rmap_next(kvm, rmapp, NULL);
spte = rmap_next(rmapp, NULL);
while (spte) {
int _young;
u64 _spte = *spte;
@ -1186,7 +1185,7 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp,
young = 1;
clear_bit(PT_ACCESSED_SHIFT, (unsigned long *)spte);
}
spte = rmap_next(kvm, rmapp, spte);
spte = rmap_next(rmapp, spte);
}
return young;
}
@ -1205,7 +1204,7 @@ static int kvm_test_age_rmapp(struct kvm *kvm, unsigned long *rmapp,
if (!shadow_accessed_mask)
goto out;
spte = rmap_next(kvm, rmapp, NULL);
spte = rmap_next(rmapp, NULL);
while (spte) {
u64 _spte = *spte;
BUG_ON(!(_spte & PT_PRESENT_MASK));
@ -1214,7 +1213,7 @@ static int kvm_test_age_rmapp(struct kvm *kvm, unsigned long *rmapp,
young = 1;
break;
}
spte = rmap_next(kvm, rmapp, spte);
spte = rmap_next(rmapp, spte);
}
out:
return young;
@ -1391,11 +1390,6 @@ struct kvm_mmu_pages {
unsigned int nr;
};
#define for_each_unsync_children(bitmap, idx) \
for (idx = find_first_bit(bitmap, 512); \
idx < 512; \
idx = find_next_bit(bitmap, 512, idx+1))
static int mmu_pages_add(struct kvm_mmu_pages *pvec, struct kvm_mmu_page *sp,
int idx)
{
@ -1417,7 +1411,7 @@ static int __mmu_unsync_walk(struct kvm_mmu_page *sp,
{
int i, ret, nr_unsync_leaf = 0;
for_each_unsync_children(sp->unsync_child_bitmap, i) {
for_each_set_bit(i, sp->unsync_child_bitmap, 512) {
struct kvm_mmu_page *child;
u64 ent = sp->spt[i];
@ -1803,6 +1797,7 @@ static void drop_large_spte(struct kvm_vcpu *vcpu, u64 *sptep)
{
if (is_large_pte(*sptep)) {
drop_spte(vcpu->kvm, sptep);
--vcpu->kvm->stat.lpages;
kvm_flush_remote_tlbs(vcpu->kvm);
}
}
@ -3190,15 +3185,14 @@ static bool sync_mmio_spte(u64 *sptep, gfn_t gfn, unsigned access,
#undef PTTYPE
static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu,
struct kvm_mmu *context,
int level)
struct kvm_mmu *context)
{
int maxphyaddr = cpuid_maxphyaddr(vcpu);
u64 exb_bit_rsvd = 0;
if (!context->nx)
exb_bit_rsvd = rsvd_bits(63, 63);
switch (level) {
switch (context->root_level) {
case PT32_ROOT_LEVEL:
/* no rsvd bits for 2 level 4K page table entries */
context->rsvd_bits_mask[0][1] = 0;
@ -3256,8 +3250,9 @@ static int paging64_init_context_common(struct kvm_vcpu *vcpu,
int level)
{
context->nx = is_nx(vcpu);
context->root_level = level;
reset_rsvds_bits_mask(vcpu, context, level);
reset_rsvds_bits_mask(vcpu, context);
ASSERT(is_pae(vcpu));
context->new_cr3 = paging_new_cr3;
@ -3267,7 +3262,6 @@ static int paging64_init_context_common(struct kvm_vcpu *vcpu,
context->invlpg = paging64_invlpg;
context->update_pte = paging64_update_pte;
context->free = paging_free;
context->root_level = level;
context->shadow_root_level = level;
context->root_hpa = INVALID_PAGE;
context->direct_map = false;
@ -3284,8 +3278,9 @@ static int paging32_init_context(struct kvm_vcpu *vcpu,
struct kvm_mmu *context)
{
context->nx = false;
context->root_level = PT32_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, context, PT32_ROOT_LEVEL);
reset_rsvds_bits_mask(vcpu, context);
context->new_cr3 = paging_new_cr3;
context->page_fault = paging32_page_fault;
@ -3294,7 +3289,6 @@ static int paging32_init_context(struct kvm_vcpu *vcpu,
context->sync_page = paging32_sync_page;
context->invlpg = paging32_invlpg;
context->update_pte = paging32_update_pte;
context->root_level = PT32_ROOT_LEVEL;
context->shadow_root_level = PT32E_ROOT_LEVEL;
context->root_hpa = INVALID_PAGE;
context->direct_map = false;
@ -3325,7 +3319,6 @@ static int init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
context->get_cr3 = get_cr3;
context->get_pdptr = kvm_pdptr_read;
context->inject_page_fault = kvm_inject_page_fault;
context->nx = is_nx(vcpu);
if (!is_paging(vcpu)) {
context->nx = false;
@ -3333,19 +3326,19 @@ static int init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
context->root_level = 0;
} else if (is_long_mode(vcpu)) {
context->nx = is_nx(vcpu);
reset_rsvds_bits_mask(vcpu, context, PT64_ROOT_LEVEL);
context->gva_to_gpa = paging64_gva_to_gpa;
context->root_level = PT64_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, context);
context->gva_to_gpa = paging64_gva_to_gpa;
} else if (is_pae(vcpu)) {
context->nx = is_nx(vcpu);
reset_rsvds_bits_mask(vcpu, context, PT32E_ROOT_LEVEL);
context->gva_to_gpa = paging64_gva_to_gpa;
context->root_level = PT32E_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, context);
context->gva_to_gpa = paging64_gva_to_gpa;
} else {
context->nx = false;
reset_rsvds_bits_mask(vcpu, context, PT32_ROOT_LEVEL);
context->gva_to_gpa = paging32_gva_to_gpa;
context->root_level = PT32_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, context);
context->gva_to_gpa = paging32_gva_to_gpa;
}
return 0;
@ -3408,18 +3401,18 @@ static int init_kvm_nested_mmu(struct kvm_vcpu *vcpu)
g_context->gva_to_gpa = nonpaging_gva_to_gpa_nested;
} else if (is_long_mode(vcpu)) {
g_context->nx = is_nx(vcpu);
reset_rsvds_bits_mask(vcpu, g_context, PT64_ROOT_LEVEL);
g_context->root_level = PT64_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, g_context);
g_context->gva_to_gpa = paging64_gva_to_gpa_nested;
} else if (is_pae(vcpu)) {
g_context->nx = is_nx(vcpu);
reset_rsvds_bits_mask(vcpu, g_context, PT32E_ROOT_LEVEL);
g_context->root_level = PT32E_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, g_context);
g_context->gva_to_gpa = paging64_gva_to_gpa_nested;
} else {
g_context->nx = false;
reset_rsvds_bits_mask(vcpu, g_context, PT32_ROOT_LEVEL);
g_context->root_level = PT32_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, g_context);
g_context->gva_to_gpa = paging32_gva_to_gpa_nested;
}
@ -3555,7 +3548,7 @@ static u64 mmu_pte_write_fetch_gpte(struct kvm_vcpu *vcpu, gpa_t *gpa,
* If we're seeing too many writes to a page, it may no longer be a page table,
* or we may be forking, in which case it is better to unmap the page.
*/
static bool detect_write_flooding(struct kvm_mmu_page *sp, u64 *spte)
static bool detect_write_flooding(struct kvm_mmu_page *sp)
{
/*
* Skip write-flooding detected for the sp whose level is 1, because
@ -3664,10 +3657,8 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
mask.cr0_wp = mask.cr4_pae = mask.nxe = 1;
for_each_gfn_indirect_valid_sp(vcpu->kvm, sp, gfn, node) {
spte = get_written_sptes(sp, gpa, &npte);
if (detect_write_misaligned(sp, gpa, bytes) ||
detect_write_flooding(sp, spte)) {
detect_write_flooding(sp)) {
zap_page |= !!kvm_mmu_prepare_zap_page(vcpu->kvm, sp,
&invalid_list);
++vcpu->kvm->stat.mmu_flooded;

4
arch/x86/kvm/mmu_audit.c
View File

@ -200,13 +200,13 @@ static void audit_write_protection(struct kvm *kvm, struct kvm_mmu_page *sp)
slot = gfn_to_memslot(kvm, sp->gfn);
rmapp = &slot->rmap[sp->gfn - slot->base_gfn];
spte = rmap_next(kvm, rmapp, NULL);
spte = rmap_next(rmapp, NULL);
while (spte) {
if (is_writable_pte(*spte))
audit_printk(kvm, "shadow page has writable "
"mappings: gfn %llx role %x\n",
sp->gfn, sp->role.word);
spte = rmap_next(kvm, rmapp, spte);
spte = rmap_next(rmapp, spte);
}
}

10
arch/x86/kvm/pmu.c
View File

@ -33,10 +33,11 @@ static struct kvm_arch_event_perf_mapping {
[4] = { 0x2e, 0x41, PERF_COUNT_HW_CACHE_MISSES },
[5] = { 0xc4, 0x00, PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
[6] = { 0xc5, 0x00, PERF_COUNT_HW_BRANCH_MISSES },
[7] = { 0x00, 0x30, PERF_COUNT_HW_REF_CPU_CYCLES },
};
/* mapping between fixed pmc index and arch_events array */
int fixed_pmc_events[] = {1, 0, 2};
int fixed_pmc_events[] = {1, 0, 7};
static bool pmc_is_gp(struct kvm_pmc *pmc)
{
@ -210,6 +211,9 @@ static void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel)
unsigned config, type = PERF_TYPE_RAW;
u8 event_select, unit_mask;
if (eventsel & ARCH_PERFMON_EVENTSEL_PIN_CONTROL)
printk_once("kvm pmu: pin control bit is ignored\n");
pmc->eventsel = eventsel;
stop_counter(pmc);
@ -220,7 +224,7 @@ static void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel)
event_select = eventsel & ARCH_PERFMON_EVENTSEL_EVENT;
unit_mask = (eventsel & ARCH_PERFMON_EVENTSEL_UMASK) >> 8;
if (!(event_select & (ARCH_PERFMON_EVENTSEL_EDGE |
if (!(eventsel & (ARCH_PERFMON_EVENTSEL_EDGE |
ARCH_PERFMON_EVENTSEL_INV |
ARCH_PERFMON_EVENTSEL_CMASK))) {
config = find_arch_event(&pmc->vcpu->arch.pmu, event_select,
@ -413,7 +417,7 @@ int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data)
struct kvm_pmc *counters;
u64 ctr;
pmc &= (3u << 30) - 1;
pmc &= ~(3u << 30);
if (!fixed && pmc >= pmu->nr_arch_gp_counters)
return 1;
if (fixed && pmc >= pmu->nr_arch_fixed_counters)

121
arch/x86/kvm/svm.c
View File

@ -111,6 +111,12 @@ struct nested_state {
#define MSRPM_OFFSETS 16
static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
/*
* Set osvw_len to higher value when updated Revision Guides
* are published and we know what the new status bits are
*/
static uint64_t osvw_len = 4, osvw_status;
struct vcpu_svm {
struct kvm_vcpu vcpu;
struct vmcb *vmcb;
@ -177,11 +183,13 @@ static bool npt_enabled = true;
#else
static bool npt_enabled;
#endif
static int npt = 1;
/* allow nested paging (virtualized MMU) for all guests */
static int npt = true;
module_param(npt, int, S_IRUGO);
static int nested = 1;
/* allow nested virtualization in KVM/SVM */
static int nested = true;
module_param(nested, int, S_IRUGO);
static void svm_flush_tlb(struct kvm_vcpu *vcpu);
@ -557,6 +565,27 @@ static void svm_init_erratum_383(void)
erratum_383_found = true;
}
static void svm_init_osvw(struct kvm_vcpu *vcpu)
{
/*
* Guests should see errata 400 and 415 as fixed (assuming that
* HLT and IO instructions are intercepted).
*/
vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
vcpu->arch.osvw.status = osvw_status & ~(6ULL);
/*
* By increasing VCPU's osvw.length to 3 we are telling the guest that
* all osvw.status bits inside that length, including bit 0 (which is
* reserved for erratum 298), are valid. However, if host processor's
* osvw_len is 0 then osvw_status[0] carries no information. We need to
* be conservative here and therefore we tell the guest that erratum 298
* is present (because we really don't know).
*/
if (osvw_len == 0 && boot_cpu_data.x86 == 0x10)
vcpu->arch.osvw.status |= 1;
}
static int has_svm(void)
{
const char *msg;
@ -623,6 +652,36 @@ static int svm_hardware_enable(void *garbage)
__get_cpu_var(current_tsc_ratio) = TSC_RATIO_DEFAULT;
}
/*
* Get OSVW bits.
*
* Note that it is possible to have a system with mixed processor
* revisions and therefore different OSVW bits. If bits are not the same
* on different processors then choose the worst case (i.e. if erratum
* is present on one processor and not on another then assume that the
* erratum is present everywhere).
*/
if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) {
uint64_t len, status = 0;
int err;
len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err);
if (!err)
status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS,
&err);
if (err)
osvw_status = osvw_len = 0;
else {
if (len < osvw_len)
osvw_len = len;
osvw_status |= status;
osvw_status &= (1ULL << osvw_len) - 1;
}
} else
osvw_status = osvw_len = 0;
svm_init_erratum_383();
amd_pmu_enable_virt();
@ -910,23 +969,28 @@ static u64 svm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc)
return _tsc;
}
static void svm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz)
static void svm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
{
struct vcpu_svm *svm = to_svm(vcpu);
u64 ratio;
u64 khz;
/* TSC scaling supported? */
if (!boot_cpu_has(X86_FEATURE_TSCRATEMSR))
return;
/* TSC-Scaling disabled or guest TSC same frequency as host TSC? */
if (user_tsc_khz == 0) {
vcpu->arch.virtual_tsc_khz = 0;
/* Guest TSC same frequency as host TSC? */
if (!scale) {
svm->tsc_ratio = TSC_RATIO_DEFAULT;
return;
}
/* TSC scaling supported? */
if (!boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
if (user_tsc_khz > tsc_khz) {
vcpu->arch.tsc_catchup = 1;
vcpu->arch.tsc_always_catchup = 1;
} else
WARN(1, "user requested TSC rate below hardware speed\n");
return;
}
khz = user_tsc_khz;
/* TSC scaling required - calculate ratio */
@ -938,7 +1002,6 @@ static void svm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz)
user_tsc_khz);
return;
}
vcpu->arch.virtual_tsc_khz = user_tsc_khz;
svm->tsc_ratio = ratio;
}
@ -958,10 +1021,14 @@ static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
}
static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
{
struct vcpu_svm *svm = to_svm(vcpu);
WARN_ON(adjustment < 0);
if (host)
adjustment = svm_scale_tsc(vcpu, adjustment);
svm->vmcb->control.tsc_offset += adjustment;
if (is_guest_mode(vcpu))
svm->nested.hsave->control.tsc_offset += adjustment;
@ -1191,6 +1258,8 @@ static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
if (kvm_vcpu_is_bsp(&svm->vcpu))
svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
svm_init_osvw(&svm->vcpu);
return &svm->vcpu;
free_page4:
@ -1268,6 +1337,21 @@ static void svm_vcpu_put(struct kvm_vcpu *vcpu)
wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
}
static void svm_update_cpl(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
int cpl;
if (!is_protmode(vcpu))
cpl = 0;
else if (svm->vmcb->save.rflags & X86_EFLAGS_VM)
cpl = 3;
else
cpl = svm->vmcb->save.cs.selector & 0x3;
svm->vmcb->save.cpl = cpl;
}
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
return to_svm(vcpu)->vmcb->save.rflags;
@ -1275,7 +1359,11 @@ static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
unsigned long old_rflags = to_svm(vcpu)->vmcb->save.rflags;
to_svm(vcpu)->vmcb->save.rflags = rflags;
if ((old_rflags ^ rflags) & X86_EFLAGS_VM)
svm_update_cpl(vcpu);
}
static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
@ -1543,9 +1631,7 @@ static void svm_set_segment(struct kvm_vcpu *vcpu,
s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
}
if (seg == VCPU_SREG_CS)
svm->vmcb->save.cpl
= (svm->vmcb->save.cs.attrib
>> SVM_SELECTOR_DPL_SHIFT) & 3;
svm_update_cpl(vcpu);
mark_dirty(svm->vmcb, VMCB_SEG);
}
@ -2735,7 +2821,10 @@ static int task_switch_interception(struct vcpu_svm *svm)
(int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
skip_emulated_instruction(&svm->vcpu);
if (kvm_task_switch(&svm->vcpu, tss_selector, reason,
if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
int_vec = -1;
if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
has_error_code, error_code) == EMULATE_FAIL) {
svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;

53
arch/x86/kvm/vmx.c
View File

@ -70,9 +70,6 @@ module_param(emulate_invalid_guest_state, bool, S_IRUGO);
static bool __read_mostly vmm_exclusive = 1;
module_param(vmm_exclusive, bool, S_IRUGO);
static bool __read_mostly yield_on_hlt = 1;
module_param(yield_on_hlt, bool, S_IRUGO);
static bool __read_mostly fasteoi = 1;
module_param(fasteoi, bool, S_IRUGO);
@ -1655,17 +1652,6 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
vmx_set_interrupt_shadow(vcpu, 0);
}
static void vmx_clear_hlt(struct kvm_vcpu *vcpu)
{
/* Ensure that we clear the HLT state in the VMCS. We don't need to
* explicitly skip the instruction because if the HLT state is set, then
* the instruction is already executing and RIP has already been
* advanced. */
if (!yield_on_hlt &&
vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT)
vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
}
/*
* KVM wants to inject page-faults which it got to the guest. This function
* checks whether in a nested guest, we need to inject them to L1 or L2.
@ -1678,7 +1664,7 @@ static int nested_pf_handled(struct kvm_vcpu *vcpu)
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
/* TODO: also check PFEC_MATCH/MASK, not just EB.PF. */
if (!(vmcs12->exception_bitmap & PF_VECTOR))
if (!(vmcs12->exception_bitmap & (1u << PF_VECTOR)))
return 0;
nested_vmx_vmexit(vcpu);
@ -1718,7 +1704,6 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
intr_info |= INTR_TYPE_HARD_EXCEPTION;
vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
vmx_clear_hlt(vcpu);
}
static bool vmx_rdtscp_supported(void)
@ -1817,13 +1802,19 @@ u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu)
}
/*
* Empty call-back. Needs to be implemented when VMX enables the SET_TSC_KHZ
* ioctl. In this case the call-back should update internal vmx state to make
* the changes effective.
* Engage any workarounds for mis-matched TSC rates. Currently limited to
* software catchup for faster rates on slower CPUs.
*/
static void vmx_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz)
static void vmx_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
{
/* Nothing to do here */
if (!scale)
return;
if (user_tsc_khz > tsc_khz) {
vcpu->arch.tsc_catchup = 1;
vcpu->arch.tsc_always_catchup = 1;
} else
WARN(1, "user requested TSC rate below hardware speed\n");
}
/*
@ -1850,7 +1841,7 @@ static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
}
}
static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
{
u64 offset = vmcs_read64(TSC_OFFSET);
vmcs_write64(TSC_OFFSET, offset + adjustment);
@ -2219,6 +2210,9 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
msr = find_msr_entry(vmx, msr_index);
if (msr) {
msr->data = data;
if (msr - vmx->guest_msrs < vmx->save_nmsrs)
kvm_set_shared_msr(msr->index, msr->data,
msr->mask);
break;
}
ret = kvm_set_msr_common(vcpu, msr_index, data);
@ -2399,7 +2393,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
&_pin_based_exec_control) < 0)
return -EIO;
min =
min = CPU_BASED_HLT_EXITING |
#ifdef CONFIG_X86_64
CPU_BASED_CR8_LOAD_EXITING |
CPU_BASED_CR8_STORE_EXITING |
@ -2414,9 +2408,6 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
CPU_BASED_INVLPG_EXITING |
CPU_BASED_RDPMC_EXITING;
if (yield_on_hlt)
min |= CPU_BASED_HLT_EXITING;
opt = CPU_BASED_TPR_SHADOW |
CPU_BASED_USE_MSR_BITMAPS |
CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
@ -4003,7 +3994,6 @@ static void vmx_inject_irq(struct kvm_vcpu *vcpu)
} else
intr |= INTR_TYPE_EXT_INTR;
vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
vmx_clear_hlt(vcpu);
}
static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
@ -4035,7 +4025,6 @@ static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
}
vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
vmx_clear_hlt(vcpu);
}
static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
@ -4672,9 +4661,10 @@ static int handle_task_switch(struct kvm_vcpu *vcpu)
bool has_error_code = false;
u32 error_code = 0;
u16 tss_selector;
int reason, type, idt_v;
int reason, type, idt_v, idt_index;
idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
idt_index = (vmx->idt_vectoring_info & VECTORING_INFO_VECTOR_MASK);
type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK);
exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
@ -4712,8 +4702,9 @@ static int handle_task_switch(struct kvm_vcpu *vcpu)
type != INTR_TYPE_NMI_INTR))
skip_emulated_instruction(vcpu);
if (kvm_task_switch(vcpu, tss_selector, reason,
has_error_code, error_code) == EMULATE_FAIL) {
if (kvm_task_switch(vcpu, tss_selector,
type == INTR_TYPE_SOFT_INTR ? idt_index : -1, reason,
has_error_code, error_code) == EMULATE_FAIL) {
vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
vcpu->run->internal.ndata = 0;

411
arch/x86/kvm/x86.c
View File

@ -97,6 +97,10 @@ EXPORT_SYMBOL_GPL(kvm_has_tsc_control);
u32 kvm_max_guest_tsc_khz;
EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz);
/* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */
static u32 tsc_tolerance_ppm = 250;
module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR);
#define KVM_NR_SHARED_MSRS 16
struct kvm_shared_msrs_global {
@ -969,50 +973,51 @@ static inline u64 get_kernel_ns(void)
static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz);
unsigned long max_tsc_khz;
static inline int kvm_tsc_changes_freq(void)
{
int cpu = get_cpu();
int ret = !boot_cpu_has(X86_FEATURE_CONSTANT_TSC) &&
cpufreq_quick_get(cpu) != 0;
put_cpu();
return ret;
}
u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu)
{
if (vcpu->arch.virtual_tsc_khz)
return vcpu->arch.virtual_tsc_khz;
else
return __this_cpu_read(cpu_tsc_khz);
}
static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
{
u64 ret;
WARN_ON(preemptible());
if (kvm_tsc_changes_freq())
printk_once(KERN_WARNING
"kvm: unreliable cycle conversion on adjustable rate TSC\n");
ret = nsec * vcpu_tsc_khz(vcpu);
do_div(ret, USEC_PER_SEC);
return ret;
return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult,
vcpu->arch.virtual_tsc_shift);
}
static void kvm_init_tsc_catchup(struct kvm_vcpu *vcpu, u32 this_tsc_khz)
static u32 adjust_tsc_khz(u32 khz, s32 ppm)
{
u64 v = (u64)khz * (1000000 + ppm);
do_div(v, 1000000);
return v;
}
static void kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 this_tsc_khz)
{
u32 thresh_lo, thresh_hi;
int use_scaling = 0;
/* Compute a scale to convert nanoseconds in TSC cycles */
kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000,
&vcpu->arch.tsc_catchup_shift,
&vcpu->arch.tsc_catchup_mult);
&vcpu->arch.virtual_tsc_shift,
&vcpu->arch.virtual_tsc_mult);
vcpu->arch.virtual_tsc_khz = this_tsc_khz;
/*
* Compute the variation in TSC rate which is acceptable
* within the range of tolerance and decide if the
* rate being applied is within that bounds of the hardware
* rate. If so, no scaling or compensation need be done.
*/
thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm);
thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm);
if (this_tsc_khz < thresh_lo || this_tsc_khz > thresh_hi) {
pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", this_tsc_khz, thresh_lo, thresh_hi);
use_scaling = 1;
}
kvm_x86_ops->set_tsc_khz(vcpu, this_tsc_khz, use_scaling);
}
static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns)
{
u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.last_tsc_nsec,
vcpu->arch.tsc_catchup_mult,
vcpu->arch.tsc_catchup_shift);
tsc += vcpu->arch.last_tsc_write;
u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec,
vcpu->arch.virtual_tsc_mult,
vcpu->arch.virtual_tsc_shift);
tsc += vcpu->arch.this_tsc_write;
return tsc;
}
@ -1021,48 +1026,88 @@ void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data)
struct kvm *kvm = vcpu->kvm;
u64 offset, ns, elapsed;
unsigned long flags;
s64 sdiff;
s64 usdiff;
raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags);
offset = kvm_x86_ops->compute_tsc_offset(vcpu, data);
ns = get_kernel_ns();
elapsed = ns - kvm->arch.last_tsc_nsec;
sdiff = data - kvm->arch.last_tsc_write;
if (sdiff < 0)
sdiff = -sdiff;
/* n.b - signed multiplication and division required */
usdiff = data - kvm->arch.last_tsc_write;
#ifdef CONFIG_X86_64
usdiff = (usdiff * 1000) / vcpu->arch.virtual_tsc_khz;
#else
/* do_div() only does unsigned */
asm("idivl %2; xor %%edx, %%edx"
: "=A"(usdiff)
: "A"(usdiff * 1000), "rm"(vcpu->arch.virtual_tsc_khz));
#endif
do_div(elapsed, 1000);
usdiff -= elapsed;
if (usdiff < 0)
usdiff = -usdiff;
/*
* Special case: close write to TSC within 5 seconds of
* another CPU is interpreted as an attempt to synchronize
* The 5 seconds is to accommodate host load / swapping as
* well as any reset of TSC during the boot process.
*
* In that case, for a reliable TSC, we can match TSC offsets,
* or make a best guest using elapsed value.
*/
if (sdiff < nsec_to_cycles(vcpu, 5ULL * NSEC_PER_SEC) &&
elapsed < 5ULL * NSEC_PER_SEC) {
* Special case: TSC write with a small delta (1 second) of virtual
* cycle time against real time is interpreted as an attempt to
* synchronize the CPU.
*
* For a reliable TSC, we can match TSC offsets, and for an unstable
* TSC, we add elapsed time in this computation. We could let the
* compensation code attempt to catch up if we fall behind, but
* it's better to try to match offsets from the beginning.
*/
if (usdiff < USEC_PER_SEC &&
vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) {
if (!check_tsc_unstable()) {
offset = kvm->arch.last_tsc_offset;
offset = kvm->arch.cur_tsc_offset;
pr_debug("kvm: matched tsc offset for %llu\n", data);
} else {
u64 delta = nsec_to_cycles(vcpu, elapsed);
offset += delta;
data += delta;
offset = kvm_x86_ops->compute_tsc_offset(vcpu, data);
pr_debug("kvm: adjusted tsc offset by %llu\n", delta);
}
ns = kvm->arch.last_tsc_nsec;
} else {
/*
* We split periods of matched TSC writes into generations.
* For each generation, we track the original measured
* nanosecond time, offset, and write, so if TSCs are in
* sync, we can match exact offset, and if not, we can match
* exact software computaion in compute_guest_tsc()
*
* These values are tracked in kvm->arch.cur_xxx variables.
*/
kvm->arch.cur_tsc_generation++;
kvm->arch.cur_tsc_nsec = ns;
kvm->arch.cur_tsc_write = data;
kvm->arch.cur_tsc_offset = offset;
pr_debug("kvm: new tsc generation %u, clock %llu\n",
kvm->arch.cur_tsc_generation, data);
}
/*
* We also track th most recent recorded KHZ, write and time to
* allow the matching interval to be extended at each write.
*/
kvm->arch.last_tsc_nsec = ns;
kvm->arch.last_tsc_write = data;
kvm->arch.last_tsc_offset = offset;
kvm_x86_ops->write_tsc_offset(vcpu, offset);
raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags);
kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz;
/* Reset of TSC must disable overshoot protection below */
vcpu->arch.hv_clock.tsc_timestamp = 0;
vcpu->arch.last_tsc_write = data;
vcpu->arch.last_tsc_nsec = ns;
vcpu->arch.last_guest_tsc = data;
/* Keep track of which generation this VCPU has synchronized to */
vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation;
vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec;
vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write;
kvm_x86_ops->write_tsc_offset(vcpu, offset);
raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags);
}
EXPORT_SYMBOL_GPL(kvm_write_tsc);
static int kvm_guest_time_update(struct kvm_vcpu *v)
@ -1078,7 +1123,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v)
local_irq_save(flags);
tsc_timestamp = kvm_x86_ops->read_l1_tsc(v);
kernel_ns = get_kernel_ns();
this_tsc_khz = vcpu_tsc_khz(v);
this_tsc_khz = __get_cpu_var(cpu_tsc_khz);
if (unlikely(this_tsc_khz == 0)) {
local_irq_restore(flags);
kvm_make_request(KVM_REQ_CLOCK_UPDATE, v);
@ -1098,7 +1143,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v)
if (vcpu->tsc_catchup) {
u64 tsc = compute_guest_tsc(v, kernel_ns);
if (tsc > tsc_timestamp) {
kvm_x86_ops->adjust_tsc_offset(v, tsc - tsc_timestamp);
adjust_tsc_offset_guest(v, tsc - tsc_timestamp);
tsc_timestamp = tsc;
}
}
@ -1130,7 +1175,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v)
* observed by the guest and ensure the new system time is greater.
*/
max_kernel_ns = 0;
if (vcpu->hv_clock.tsc_timestamp && vcpu->last_guest_tsc) {
if (vcpu->hv_clock.tsc_timestamp) {
max_kernel_ns = vcpu->last_guest_tsc -
vcpu->hv_clock.tsc_timestamp;
max_kernel_ns = pvclock_scale_delta(max_kernel_ns,
@ -1504,6 +1549,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
case MSR_K7_HWCR:
data &= ~(u64)0x40; /* ignore flush filter disable */
data &= ~(u64)0x100; /* ignore ignne emulation enable */
data &= ~(u64)0x8; /* ignore TLB cache disable */
if (data != 0) {
pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
data);
@ -1676,6 +1722,16 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
*/
pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data);
break;
case MSR_AMD64_OSVW_ID_LENGTH:
if (!guest_cpuid_has_osvw(vcpu))
return 1;
vcpu->arch.osvw.length = data;
break;
case MSR_AMD64_OSVW_STATUS:
if (!guest_cpuid_has_osvw(vcpu))
return 1;
vcpu->arch.osvw.status = data;
break;
default:
if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
return xen_hvm_config(vcpu, data);
@ -1960,6 +2016,16 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
*/
data = 0xbe702111;
break;
case MSR_AMD64_OSVW_ID_LENGTH:
if (!guest_cpuid_has_osvw(vcpu))
return 1;
data = vcpu->arch.osvw.length;
break;
case MSR_AMD64_OSVW_STATUS:
if (!guest_cpuid_has_osvw(vcpu))
return 1;
data = vcpu->arch.osvw.status;
break;
default:
if (kvm_pmu_msr(vcpu, msr))
return kvm_pmu_get_msr(vcpu, msr, pdata);
@ -2080,6 +2146,7 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_XSAVE:
case KVM_CAP_ASYNC_PF:
case KVM_CAP_GET_TSC_KHZ:
case KVM_CAP_PCI_2_3:
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
@ -2214,19 +2281,23 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
}
kvm_x86_ops->vcpu_load(vcpu, cpu);
/* Apply any externally detected TSC adjustments (due to suspend) */
if (unlikely(vcpu->arch.tsc_offset_adjustment)) {
adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment);
vcpu->arch.tsc_offset_adjustment = 0;
set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests);
}
if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) {
/* Make sure TSC doesn't go backwards */
s64 tsc_delta;
u64 tsc;
tsc = kvm_x86_ops->read_l1_tsc(vcpu);
tsc_delta = !vcpu->arch.last_guest_tsc ? 0 :
tsc - vcpu->arch.last_guest_tsc;
s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 :
native_read_tsc() - vcpu->arch.last_host_tsc;
if (tsc_delta < 0)
mark_tsc_unstable("KVM discovered backwards TSC");
if (check_tsc_unstable()) {
kvm_x86_ops->adjust_tsc_offset(vcpu, -tsc_delta);
u64 offset = kvm_x86_ops->compute_tsc_offset(vcpu,
vcpu->arch.last_guest_tsc);
kvm_x86_ops->write_tsc_offset(vcpu, offset);
vcpu->arch.tsc_catchup = 1;
}
kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
@ -2243,7 +2314,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
kvm_x86_ops->vcpu_put(vcpu);
kvm_put_guest_fpu(vcpu);
vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu);
vcpu->arch.last_host_tsc = native_read_tsc();
}
static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
@ -2785,26 +2856,21 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
u32 user_tsc_khz;
r = -EINVAL;
if (!kvm_has_tsc_control)
break;
user_tsc_khz = (u32)arg;
if (user_tsc_khz >= kvm_max_guest_tsc_khz)
goto out;
kvm_x86_ops->set_tsc_khz(vcpu, user_tsc_khz);
if (user_tsc_khz == 0)
user_tsc_khz = tsc_khz;
kvm_set_tsc_khz(vcpu, user_tsc_khz);
r = 0;
goto out;
}
case KVM_GET_TSC_KHZ: {
r = -EIO;
if (check_tsc_unstable())
goto out;
r = vcpu_tsc_khz(vcpu);
r = vcpu->arch.virtual_tsc_khz;
goto out;
}
default:
@ -2815,6 +2881,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
return r;
}
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
return VM_FAULT_SIGBUS;
}
static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
{
int ret;
@ -2998,6 +3069,8 @@ static void write_protect_slot(struct kvm *kvm,
unsigned long *dirty_bitmap,
unsigned long nr_dirty_pages)
{
spin_lock(&kvm->mmu_lock);
/* Not many dirty pages compared to # of shadow pages. */
if (nr_dirty_pages < kvm->arch.n_used_mmu_pages) {
unsigned long gfn_offset;
@ -3005,16 +3078,13 @@ static void write_protect_slot(struct kvm *kvm,
for_each_set_bit(gfn_offset, dirty_bitmap, memslot->npages) {
unsigned long gfn = memslot->base_gfn + gfn_offset;
spin_lock(&kvm->mmu_lock);
kvm_mmu_rmap_write_protect(kvm, gfn, memslot);
spin_unlock(&kvm->mmu_lock);
}
kvm_flush_remote_tlbs(kvm);
} else {
spin_lock(&kvm->mmu_lock);
} else
kvm_mmu_slot_remove_write_access(kvm, memslot->id);
spin_unlock(&kvm->mmu_lock);
}
spin_unlock(&kvm->mmu_lock);
}
/*
@ -3133,6 +3203,9 @@ long kvm_arch_vm_ioctl(struct file *filp,
r = -EEXIST;
if (kvm->arch.vpic)
goto create_irqchip_unlock;
r = -EINVAL;
if (atomic_read(&kvm->online_vcpus))
goto create_irqchip_unlock;
r = -ENOMEM;
vpic = kvm_create_pic(kvm);
if (vpic) {
@ -4063,6 +4136,11 @@ static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val)
return res;
}
static void emulator_set_rflags(struct x86_emulate_ctxt *ctxt, ulong val)
{
kvm_set_rflags(emul_to_vcpu(ctxt), val);
}
static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt)
{
return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt));
@ -4244,6 +4322,7 @@ static struct x86_emulate_ops emulate_ops = {
.set_idt = emulator_set_idt,
.get_cr = emulator_get_cr,
.set_cr = emulator_set_cr,
.set_rflags = emulator_set_rflags,
.cpl = emulator_get_cpl,
.get_dr = emulator_get_dr,
.set_dr = emulator_set_dr,
@ -5288,6 +5367,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
profile_hit(KVM_PROFILING, (void *)rip);
}
if (unlikely(vcpu->arch.tsc_always_catchup))
kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
kvm_lapic_sync_from_vapic(vcpu);
@ -5587,15 +5668,15 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
return 0;
}
int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
bool has_error_code, u32 error_code)
int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
int reason, bool has_error_code, u32 error_code)
{
struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
int ret;
init_emulate_ctxt(vcpu);
ret = emulator_task_switch(ctxt, tss_selector, reason,
ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason,
has_error_code, error_code);
if (ret)
@ -5928,13 +6009,88 @@ int kvm_arch_hardware_enable(void *garbage)
struct kvm *kvm;
struct kvm_vcpu *vcpu;
int i;
int ret;
u64 local_tsc;
u64 max_tsc = 0;
bool stable, backwards_tsc = false;
kvm_shared_msr_cpu_online();
list_for_each_entry(kvm, &vm_list, vm_list)
kvm_for_each_vcpu(i, vcpu, kvm)
if (vcpu->cpu == smp_processor_id())
kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
return kvm_x86_ops->hardware_enable(garbage);
ret = kvm_x86_ops->hardware_enable(garbage);
if (ret != 0)
return ret;
local_tsc = native_read_tsc();
stable = !check_tsc_unstable();
list_for_each_entry(kvm, &vm_list, vm_list) {
kvm_for_each_vcpu(i, vcpu, kvm) {
if (!stable && vcpu->cpu == smp_processor_id())
set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests);
if (stable && vcpu->arch.last_host_tsc > local_tsc) {
backwards_tsc = true;
if (vcpu->arch.last_host_tsc > max_tsc)
max_tsc = vcpu->arch.last_host_tsc;
}
}
}
/*
* Sometimes, even reliable TSCs go backwards. This happens on
* platforms that reset TSC during suspend or hibernate actions, but
* maintain synchronization. We must compensate. Fortunately, we can
* detect that condition here, which happens early in CPU bringup,
* before any KVM threads can be running. Unfortunately, we can't
* bring the TSCs fully up to date with real time, as we aren't yet far
* enough into CPU bringup that we know how much real time has actually
* elapsed; our helper function, get_kernel_ns() will be using boot
* variables that haven't been updated yet.
*
* So we simply find the maximum observed TSC above, then record the
* adjustment to TSC in each VCPU. When the VCPU later gets loaded,
* the adjustment will be applied. Note that we accumulate
* adjustments, in case multiple suspend cycles happen before some VCPU
* gets a chance to run again. In the event that no KVM threads get a
* chance to run, we will miss the entire elapsed period, as we'll have
* reset last_host_tsc, so VCPUs will not have the TSC adjusted and may
* loose cycle time. This isn't too big a deal, since the loss will be
* uniform across all VCPUs (not to mention the scenario is extremely
* unlikely). It is possible that a second hibernate recovery happens
* much faster than a first, causing the observed TSC here to be
* smaller; this would require additional padding adjustment, which is
* why we set last_host_tsc to the local tsc observed here.
*
* N.B. - this code below runs only on platforms with reliable TSC,
* as that is the only way backwards_tsc is set above. Also note
* that this runs for ALL vcpus, which is not a bug; all VCPUs should
* have the same delta_cyc adjustment applied if backwards_tsc
* is detected. Note further, this adjustment is only done once,
* as we reset last_host_tsc on all VCPUs to stop this from being
* called multiple times (one for each physical CPU bringup).
*
* Platforms with unnreliable TSCs don't have to deal with this, they
* will be compensated by the logic in vcpu_load, which sets the TSC to
* catchup mode. This will catchup all VCPUs to real time, but cannot
* guarantee that they stay in perfect synchronization.
*/
if (backwards_tsc) {
u64 delta_cyc = max_tsc - local_tsc;
list_for_each_entry(kvm, &vm_list, vm_list) {
kvm_for_each_vcpu(i, vcpu, kvm) {
vcpu->arch.tsc_offset_adjustment += delta_cyc;
vcpu->arch.last_host_tsc = local_tsc;
}
/*
* We have to disable TSC offset matching.. if you were
* booting a VM while issuing an S4 host suspend....
* you may have some problem. Solving this issue is
* left as an exercise to the reader.
*/
kvm->arch.last_tsc_nsec = 0;
kvm->arch.last_tsc_write = 0;
}
}
return 0;
}
void kvm_arch_hardware_disable(void *garbage)
@ -5958,6 +6114,11 @@ void kvm_arch_check_processor_compat(void *rtn)
kvm_x86_ops->check_processor_compatibility(rtn);
}
bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu)
{
return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL);
}
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
struct page *page;
@ -5980,7 +6141,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
}
vcpu->arch.pio_data = page_address(page);
kvm_init_tsc_catchup(vcpu, max_tsc_khz);
kvm_set_tsc_khz(vcpu, max_tsc_khz);
r = kvm_mmu_create(vcpu);
if (r < 0)
@ -6032,8 +6193,11 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
free_page((unsigned long)vcpu->arch.pio_data);
}
int kvm_arch_init_vm(struct kvm *kvm)
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
if (type)
return -EINVAL;
INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
@ -6093,6 +6257,65 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
put_page(kvm->arch.ept_identity_pagetable);
}
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
int i;
for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) {
if (!dont || free->arch.lpage_info[i] != dont->arch.lpage_info[i]) {
vfree(free->arch.lpage_info[i]);
free->arch.lpage_info[i] = NULL;
}
}
}
int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
{
int i;
for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) {
unsigned long ugfn;
int lpages;
int level = i + 2;
lpages = gfn_to_index(slot->base_gfn + npages - 1,
slot->base_gfn, level) + 1;
slot->arch.lpage_info[i] =
vzalloc(lpages * sizeof(*slot->arch.lpage_info[i]));
if (!slot->arch.lpage_info[i])
goto out_free;
if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1))
slot->arch.lpage_info[i][0].write_count = 1;
if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1))
slot->arch.lpage_info[i][lpages - 1].write_count = 1;
ugfn = slot->userspace_addr >> PAGE_SHIFT;
/*
* If the gfn and userspace address are not aligned wrt each
* other, or if explicitly asked to, disable large page
* support for this slot
*/
if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) ||
!kvm_largepages_enabled()) {
unsigned long j;
for (j = 0; j < lpages; ++j)
slot->arch.lpage_info[i][j].write_count = 1;
}
}
return 0;
out_free:
for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) {
vfree(slot->arch.lpage_info[i]);
slot->arch.lpage_info[i] = NULL;
}
return -ENOMEM;
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_memory_slot old,

4
arch/x86/power/cpu.c
View File

@ -115,7 +115,7 @@ static void __save_processor_state(struct saved_context *ctxt)
void save_processor_state(void)
{
__save_processor_state(&saved_context);
save_sched_clock_state();
x86_platform.save_sched_clock_state();
}
#ifdef CONFIG_X86_32
EXPORT_SYMBOL(save_processor_state);
@ -231,8 +231,8 @@ static void __restore_processor_state(struct saved_context *ctxt)
/* Needed by apm.c */
void restore_processor_state(void)
{
x86_platform.restore_sched_clock_state();
__restore_processor_state(&saved_context);
restore_sched_clock_state();
}
#ifdef CONFIG_X86_32
EXPORT_SYMBOL(restore_processor_state);

98
include/linux/kvm.h
View File

@ -162,6 +162,7 @@ struct kvm_pit_config {
#define KVM_EXIT_INTERNAL_ERROR 17
#define KVM_EXIT_OSI 18
#define KVM_EXIT_PAPR_HCALL 19
#define KVM_EXIT_S390_UCONTROL 20
/* For KVM_EXIT_INTERNAL_ERROR */
#define KVM_INTERNAL_ERROR_EMULATION 1
@ -249,6 +250,11 @@ struct kvm_run {
#define KVM_S390_RESET_CPU_INIT 8
#define KVM_S390_RESET_IPL 16
__u64 s390_reset_flags;
/* KVM_EXIT_S390_UCONTROL */
struct {
__u64 trans_exc_code;
__u32 pgm_code;
} s390_ucontrol;
/* KVM_EXIT_DCR */
struct {
__u32 dcrn;
@ -273,6 +279,20 @@ struct kvm_run {
/* Fix the size of the union. */
char padding[256];
};
/*
* shared registers between kvm and userspace.
* kvm_valid_regs specifies the register classes set by the host
* kvm_dirty_regs specified the register classes dirtied by userspace
* struct kvm_sync_regs is architecture specific, as well as the
* bits for kvm_valid_regs and kvm_dirty_regs
*/
__u64 kvm_valid_regs;
__u64 kvm_dirty_regs;
union {
struct kvm_sync_regs regs;
char padding[1024];
} s;
};
/* for KVM_REGISTER_COALESCED_MMIO / KVM_UNREGISTER_COALESCED_MMIO */
@ -431,6 +451,11 @@ struct kvm_ppc_pvinfo {
#define KVMIO 0xAE
/* machine type bits, to be used as argument to KVM_CREATE_VM */
#define KVM_VM_S390_UCONTROL 1
#define KVM_S390_SIE_PAGE_OFFSET 1
/*
* ioctls for /dev/kvm fds:
*/
@ -555,9 +580,15 @@ struct kvm_ppc_pvinfo {
#define KVM_CAP_PPC_SMT 64
#define KVM_CAP_PPC_RMA 65
#define KVM_CAP_MAX_VCPUS 66 /* returns max vcpus per vm */
#define KVM_CAP_PPC_HIOR 67
#define KVM_CAP_PPC_PAPR 68
#define KVM_CAP_SW_TLB 69
#define KVM_CAP_ONE_REG 70
#define KVM_CAP_S390_GMAP 71
#define KVM_CAP_TSC_DEADLINE_TIMER 72
#define KVM_CAP_S390_UCONTROL 73
#define KVM_CAP_SYNC_REGS 74
#define KVM_CAP_PCI_2_3 75
#ifdef KVM_CAP_IRQ_ROUTING
@ -637,6 +668,52 @@ struct kvm_clock_data {
__u32 pad[9];
};
#define KVM_MMU_FSL_BOOKE_NOHV 0
#define KVM_MMU_FSL_BOOKE_HV 1
struct kvm_config_tlb {
__u64 params;
__u64 array;
__u32 mmu_type;
__u32 array_len;
};
struct kvm_dirty_tlb {
__u64 bitmap;
__u32 num_dirty;
};
/* Available with KVM_CAP_ONE_REG */
#define KVM_REG_ARCH_MASK 0xff00000000000000ULL
#define KVM_REG_GENERIC 0x0000000000000000ULL
/*
* Architecture specific registers are to be defined in arch headers and
* ORed with the arch identifier.
*/
#define KVM_REG_PPC 0x1000000000000000ULL
#define KVM_REG_X86 0x2000000000000000ULL
#define KVM_REG_IA64 0x3000000000000000ULL
#define KVM_REG_ARM 0x4000000000000000ULL
#define KVM_REG_S390 0x5000000000000000ULL
#define KVM_REG_SIZE_SHIFT 52
#define KVM_REG_SIZE_MASK 0x00f0000000000000ULL
#define KVM_REG_SIZE_U8 0x0000000000000000ULL
#define KVM_REG_SIZE_U16 0x0010000000000000ULL
#define KVM_REG_SIZE_U32 0x0020000000000000ULL
#define KVM_REG_SIZE_U64 0x0030000000000000ULL
#define KVM_REG_SIZE_U128 0x0040000000000000ULL
#define KVM_REG_SIZE_U256 0x0050000000000000ULL
#define KVM_REG_SIZE_U512 0x0060000000000000ULL
#define KVM_REG_SIZE_U1024 0x0070000000000000ULL
struct kvm_one_reg {
__u64 id;
__u64 addr;
};
/*
* ioctls for VM fds
*/
@ -655,6 +732,17 @@ struct kvm_clock_data {
struct kvm_userspace_memory_region)
#define KVM_SET_TSS_ADDR _IO(KVMIO, 0x47)
#define KVM_SET_IDENTITY_MAP_ADDR _IOW(KVMIO, 0x48, __u64)
/* enable ucontrol for s390 */
struct kvm_s390_ucas_mapping {
__u64 user_addr;
__u64 vcpu_addr;
__u64 length;
};
#define KVM_S390_UCAS_MAP _IOW(KVMIO, 0x50, struct kvm_s390_ucas_mapping)
#define KVM_S390_UCAS_UNMAP _IOW(KVMIO, 0x51, struct kvm_s390_ucas_mapping)
#define KVM_S390_VCPU_FAULT _IOW(KVMIO, 0x52, unsigned long)
/* Device model IOC */
#define KVM_CREATE_IRQCHIP _IO(KVMIO, 0x60)
#define KVM_IRQ_LINE _IOW(KVMIO, 0x61, struct kvm_irq_level)
@ -697,6 +785,9 @@ struct kvm_clock_data {
/* Available with KVM_CAP_TSC_CONTROL */
#define KVM_SET_TSC_KHZ _IO(KVMIO, 0xa2)
#define KVM_GET_TSC_KHZ _IO(KVMIO, 0xa3)
/* Available with KVM_CAP_PCI_2_3 */
#define KVM_ASSIGN_SET_INTX_MASK _IOW(KVMIO, 0xa4, \
struct kvm_assigned_pci_dev)
/*
* ioctls for vcpu fds
@ -763,8 +854,15 @@ struct kvm_clock_data {
#define KVM_CREATE_SPAPR_TCE _IOW(KVMIO, 0xa8, struct kvm_create_spapr_tce)
/* Available with KVM_CAP_RMA */
#define KVM_ALLOCATE_RMA _IOR(KVMIO, 0xa9, struct kvm_allocate_rma)
/* Available with KVM_CAP_SW_TLB */
#define KVM_DIRTY_TLB _IOW(KVMIO, 0xaa, struct kvm_dirty_tlb)
/* Available with KVM_CAP_ONE_REG */
#define KVM_GET_ONE_REG _IOW(KVMIO, 0xab, struct kvm_one_reg)
#define KVM_SET_ONE_REG _IOW(KVMIO, 0xac, struct kvm_one_reg)
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
#define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)
#define KVM_DEV_ASSIGN_MASK_INTX (1 << 2)
struct kvm_assigned_pci_dev {
__u32 assigned_dev_id;

69
include/linux/kvm_host.h
View File

@ -172,11 +172,6 @@ static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
*/
#define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
struct kvm_lpage_info {
unsigned long rmap_pde;
int write_count;
};
struct kvm_memory_slot {
gfn_t base_gfn;
unsigned long npages;
@ -185,7 +180,7 @@ struct kvm_memory_slot {
unsigned long *dirty_bitmap;
unsigned long *dirty_bitmap_head;
unsigned long nr_dirty_pages;
struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
struct kvm_arch_memory_slot arch;
unsigned long userspace_addr;
int user_alloc;
int id;
@ -377,6 +372,9 @@ int kvm_set_memory_region(struct kvm *kvm,
int __kvm_set_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,
int user_alloc);
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont);
int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_memory_slot old,
@ -386,6 +384,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,
struct kvm_memory_slot old,
int user_alloc);
bool kvm_largepages_enabled(void);
void kvm_disable_largepages(void);
void kvm_arch_flush_shadow(struct kvm *kvm);
@ -451,6 +450,7 @@ long kvm_arch_dev_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg);
long kvm_arch_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg);
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
int kvm_dev_ioctl_check_extension(long ext);
@ -521,7 +521,7 @@ static inline void kvm_arch_free_vm(struct kvm *kvm)
}
#endif
int kvm_arch_init_vm(struct kvm *kvm);
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
void kvm_arch_destroy_vm(struct kvm *kvm);
void kvm_free_all_assigned_devices(struct kvm *kvm);
void kvm_arch_sync_events(struct kvm *kvm);
@ -547,6 +547,7 @@ struct kvm_assigned_dev_kernel {
unsigned int entries_nr;
int host_irq;
bool host_irq_disabled;
bool pci_2_3;
struct msix_entry *host_msix_entries;
int guest_irq;
struct msix_entry *guest_msix_entries;
@ -556,6 +557,7 @@ struct kvm_assigned_dev_kernel {
struct pci_dev *dev;
struct kvm *kvm;
spinlock_t intx_lock;
spinlock_t intx_mask_lock;
char irq_name[32];
struct pci_saved_state *pci_saved_state;
};
@ -651,11 +653,43 @@ static inline void kvm_guest_exit(void)
current->flags &= ~PF_VCPU;
}
/*
* search_memslots() and __gfn_to_memslot() are here because they are
* used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
* gfn_to_memslot() itself isn't here as an inline because that would
* bloat other code too much.
*/
static inline struct kvm_memory_slot *
search_memslots(struct kvm_memslots *slots, gfn_t gfn)
{
struct kvm_memory_slot *memslot;
kvm_for_each_memslot(memslot, slots)
if (gfn >= memslot->base_gfn &&
gfn < memslot->base_gfn + memslot->npages)
return memslot;
return NULL;
}
static inline struct kvm_memory_slot *
__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
{
return search_memslots(slots, gfn);
}
static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
{
return gfn_to_memslot(kvm, gfn)->id;
}
static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
{
/* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
(base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
}
static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
gfn_t gfn)
{
@ -702,12 +736,16 @@ static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_se
if (unlikely(vcpu->kvm->mmu_notifier_count))
return 1;
/*
* Both reads happen under the mmu_lock and both values are
* modified under mmu_lock, so there's no need of smb_rmb()
* here in between, otherwise mmu_notifier_count should be
* read before mmu_notifier_seq, see
* mmu_notifier_invalidate_range_end write side.
* Ensure the read of mmu_notifier_count happens before the read
* of mmu_notifier_seq. This interacts with the smp_wmb() in
* mmu_notifier_invalidate_range_end to make sure that the caller
* either sees the old (non-zero) value of mmu_notifier_count or
* the new (incremented) value of mmu_notifier_seq.
* PowerPC Book3s HV KVM calls this under a per-page lock
* rather than under kvm->mmu_lock, for scalability, so
* can't rely on kvm->mmu_lock to keep things ordered.
*/
smp_rmb();
if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
return 1;
return 0;
@ -770,6 +808,13 @@ static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
{
return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
}
bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
#else
static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
#endif
#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT

213
virt/kvm/assigned-dev.c
View File

@ -49,31 +49,73 @@ static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
index = i;
break;
}
if (index < 0) {
if (index < 0)
printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n");
return 0;
}
return index;
}
static irqreturn_t kvm_assigned_dev_thread(int irq, void *dev_id)
static irqreturn_t kvm_assigned_dev_intx(int irq, void *dev_id)
{
struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
int ret;
spin_lock(&assigned_dev->intx_lock);
if (pci_check_and_mask_intx(assigned_dev->dev)) {
assigned_dev->host_irq_disabled = true;
ret = IRQ_WAKE_THREAD;
} else
ret = IRQ_NONE;
spin_unlock(&assigned_dev->intx_lock);
return ret;
}
static void
kvm_assigned_dev_raise_guest_irq(struct kvm_assigned_dev_kernel *assigned_dev,
int vector)
{
if (unlikely(assigned_dev->irq_requested_type &
KVM_DEV_IRQ_GUEST_INTX)) {
spin_lock(&assigned_dev->intx_mask_lock);
if (!(assigned_dev->flags & KVM_DEV_ASSIGN_MASK_INTX))
kvm_set_irq(assigned_dev->kvm,
assigned_dev->irq_source_id, vector, 1);
spin_unlock(&assigned_dev->intx_mask_lock);
} else
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
vector, 1);
}
static irqreturn_t kvm_assigned_dev_thread_intx(int irq, void *dev_id)
{
struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_INTX) {
spin_lock(&assigned_dev->intx_lock);
if (!(assigned_dev->flags & KVM_DEV_ASSIGN_PCI_2_3)) {
spin_lock_irq(&assigned_dev->intx_lock);
disable_irq_nosync(irq);
assigned_dev->host_irq_disabled = true;
spin_unlock(&assigned_dev->intx_lock);
spin_unlock_irq(&assigned_dev->intx_lock);
}
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
assigned_dev->guest_irq, 1);
kvm_assigned_dev_raise_guest_irq(assigned_dev,
assigned_dev->guest_irq);
return IRQ_HANDLED;
}
#ifdef __KVM_HAVE_MSI
static irqreturn_t kvm_assigned_dev_thread_msi(int irq, void *dev_id)
{
struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
kvm_assigned_dev_raise_guest_irq(assigned_dev,
assigned_dev->guest_irq);
return IRQ_HANDLED;
}
#endif
#ifdef __KVM_HAVE_MSIX
static irqreturn_t kvm_assigned_dev_thread_msix(int irq, void *dev_id)
{
@ -83,8 +125,7 @@ static irqreturn_t kvm_assigned_dev_thread_msix(int irq, void *dev_id)
if (index >= 0) {
vector = assigned_dev->guest_msix_entries[index].vector;
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
vector, 1);
kvm_assigned_dev_raise_guest_irq(assigned_dev, vector);
}
return IRQ_HANDLED;
@ -100,15 +141,31 @@ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
/* The guest irq may be shared so this ack may be
* from another device.
*/
spin_lock(&dev->intx_lock);
if (dev->host_irq_disabled) {
enable_irq(dev->host_irq);
dev->host_irq_disabled = false;
spin_lock(&dev->intx_mask_lock);
if (!(dev->flags & KVM_DEV_ASSIGN_MASK_INTX)) {
bool reassert = false;
spin_lock_irq(&dev->intx_lock);
/*
* The guest IRQ may be shared so this ack can come from an
* IRQ for another guest device.
*/
if (dev->host_irq_disabled) {
if (!(dev->flags & KVM_DEV_ASSIGN_PCI_2_3))
enable_irq(dev->host_irq);
else if (!pci_check_and_unmask_intx(dev->dev))
reassert = true;
dev->host_irq_disabled = reassert;
}
spin_unlock_irq(&dev->intx_lock);
if (reassert)
kvm_set_irq(dev->kvm, dev->irq_source_id,
dev->guest_irq, 1);
}
spin_unlock(&dev->intx_lock);
spin_unlock(&dev->intx_mask_lock);
}
static void deassign_guest_irq(struct kvm *kvm,
@ -156,7 +213,15 @@ static void deassign_host_irq(struct kvm *kvm,
pci_disable_msix(assigned_dev->dev);
} else {
/* Deal with MSI and INTx */
disable_irq(assigned_dev->host_irq);
if ((assigned_dev->irq_requested_type &
KVM_DEV_IRQ_HOST_INTX) &&
(assigned_dev->flags & KVM_DEV_ASSIGN_PCI_2_3)) {
spin_lock_irq(&assigned_dev->intx_lock);
pci_intx(assigned_dev->dev, false);
spin_unlock_irq(&assigned_dev->intx_lock);
synchronize_irq(assigned_dev->host_irq);
} else
disable_irq(assigned_dev->host_irq);
free_irq(assigned_dev->host_irq, assigned_dev);
@ -237,15 +302,34 @@ void kvm_free_all_assigned_devices(struct kvm *kvm)
static int assigned_device_enable_host_intx(struct kvm *kvm,
struct kvm_assigned_dev_kernel *dev)
{
irq_handler_t irq_handler;
unsigned long flags;
dev->host_irq = dev->dev->irq;
/* Even though this is PCI, we don't want to use shared
* interrupts. Sharing host devices with guest-assigned devices
* on the same interrupt line is not a happy situation: there
* are going to be long delays in accepting, acking, etc.
/*
* We can only share the IRQ line with other host devices if we are
* able to disable the IRQ source at device-level - independently of
* the guest driver. Otherwise host devices may suffer from unbounded
* IRQ latencies when the guest keeps the line asserted.
*/
if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
IRQF_ONESHOT, dev->irq_name, dev))
if (dev->flags & KVM_DEV_ASSIGN_PCI_2_3) {
irq_handler = kvm_assigned_dev_intx;
flags = IRQF_SHARED;
} else {
irq_handler = NULL;
flags = IRQF_ONESHOT;
}
if (request_threaded_irq(dev->host_irq, irq_handler,
kvm_assigned_dev_thread_intx, flags,
dev->irq_name, dev))
return -EIO;
if (dev->flags & KVM_DEV_ASSIGN_PCI_2_3) {
spin_lock_irq(&dev->intx_lock);
pci_intx(dev->dev, true);
spin_unlock_irq(&dev->intx_lock);
}
return 0;
}
@ -262,8 +346,9 @@ static int assigned_device_enable_host_msi(struct kvm *kvm,
}
dev->host_irq = dev->dev->irq;
if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
0, dev->irq_name, dev)) {
if (request_threaded_irq(dev->host_irq, NULL,
kvm_assigned_dev_thread_msi, 0,
dev->irq_name, dev)) {
pci_disable_msi(dev->dev);
return -EIO;
}
@ -321,7 +406,6 @@ static int assigned_device_enable_guest_msi(struct kvm *kvm,
{
dev->guest_irq = irq->guest_irq;
dev->ack_notifier.gsi = -1;
dev->host_irq_disabled = false;
return 0;
}
#endif
@ -333,7 +417,6 @@ static int assigned_device_enable_guest_msix(struct kvm *kvm,
{
dev->guest_irq = irq->guest_irq;
dev->ack_notifier.gsi = -1;
dev->host_irq_disabled = false;
return 0;
}
#endif
@ -367,6 +450,7 @@ static int assign_host_irq(struct kvm *kvm,
default:
r = -EINVAL;
}
dev->host_irq_disabled = false;
if (!r)
dev->irq_requested_type |= host_irq_type;
@ -468,6 +552,7 @@ static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
{
int r = -ENODEV;
struct kvm_assigned_dev_kernel *match;
unsigned long irq_type;
mutex_lock(&kvm->lock);
@ -476,7 +561,9 @@ static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
if (!match)
goto out;
r = kvm_deassign_irq(kvm, match, assigned_irq->flags);
irq_type = assigned_irq->flags & (KVM_DEV_IRQ_HOST_MASK |
KVM_DEV_IRQ_GUEST_MASK);
r = kvm_deassign_irq(kvm, match, irq_type);
out:
mutex_unlock(&kvm->lock);
return r;
@ -609,6 +696,10 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
if (!match->pci_saved_state)
printk(KERN_DEBUG "%s: Couldn't store %s saved state\n",
__func__, dev_name(&dev->dev));
if (!pci_intx_mask_supported(dev))
assigned_dev->flags &= ~KVM_DEV_ASSIGN_PCI_2_3;
match->assigned_dev_id = assigned_dev->assigned_dev_id;
match->host_segnr = assigned_dev->segnr;
match->host_busnr = assigned_dev->busnr;
@ -616,6 +707,7 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
match->flags = assigned_dev->flags;
match->dev = dev;
spin_lock_init(&match->intx_lock);
spin_lock_init(&match->intx_mask_lock);
match->irq_source_id = -1;
match->kvm = kvm;
match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
@ -761,6 +853,55 @@ static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm,
}
#endif
static int kvm_vm_ioctl_set_pci_irq_mask(struct kvm *kvm,
struct kvm_assigned_pci_dev *assigned_dev)
{
int r = 0;
struct kvm_assigned_dev_kernel *match;
mutex_lock(&kvm->lock);
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
assigned_dev->assigned_dev_id);
if (!match) {
r = -ENODEV;
goto out;
}
spin_lock(&match->intx_mask_lock);
match->flags &= ~KVM_DEV_ASSIGN_MASK_INTX;
match->flags |= assigned_dev->flags & KVM_DEV_ASSIGN_MASK_INTX;
if (match->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) {
if (assigned_dev->flags & KVM_DEV_ASSIGN_MASK_INTX) {
kvm_set_irq(match->kvm, match->irq_source_id,
match->guest_irq, 0);
/*
* Masking at hardware-level is performed on demand,
* i.e. when an IRQ actually arrives at the host.
*/
} else if (!(assigned_dev->flags & KVM_DEV_ASSIGN_PCI_2_3)) {
/*
* Unmask the IRQ line if required. Unmasking at
* device level will be performed by user space.
*/
spin_lock_irq(&match->intx_lock);
if (match->host_irq_disabled) {
enable_irq(match->host_irq);
match->host_irq_disabled = false;
}
spin_unlock_irq(&match->intx_lock);
}
}
spin_unlock(&match->intx_mask_lock);
out:
mutex_unlock(&kvm->lock);
return r;
}
long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
unsigned long arg)
{
@ -868,6 +1009,15 @@ long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
break;
}
#endif
case KVM_ASSIGN_SET_INTX_MASK: {
struct kvm_assigned_pci_dev assigned_dev;
r = -EFAULT;
if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
goto out;
r = kvm_vm_ioctl_set_pci_irq_mask(kvm, &assigned_dev);
break;
}
default:
r = -ENOTTY;
break;
@ -875,4 +1025,3 @@ long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
out:
return r;
}

148
virt/kvm/kvm_main.c
View File

@ -203,7 +203,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
void kvm_flush_remote_tlbs(struct kvm *kvm)
{
int dirty_count = kvm->tlbs_dirty;
long dirty_count = kvm->tlbs_dirty;
smp_mb();
if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
@ -289,15 +289,15 @@ static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn,
*/
idx = srcu_read_lock(&kvm->srcu);
spin_lock(&kvm->mmu_lock);
kvm->mmu_notifier_seq++;
need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty;
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
/* we've to flush the tlb before the pages can be freed */
if (need_tlb_flush)
kvm_flush_remote_tlbs(kvm);
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
}
static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn,
@ -335,12 +335,12 @@ static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
for (; start < end; start += PAGE_SIZE)
need_tlb_flush |= kvm_unmap_hva(kvm, start);
need_tlb_flush |= kvm->tlbs_dirty;
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
/* we've to flush the tlb before the pages can be freed */
if (need_tlb_flush)
kvm_flush_remote_tlbs(kvm);
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
}
static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn,
@ -357,11 +357,11 @@ static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn,
* been freed.
*/
kvm->mmu_notifier_seq++;
smp_wmb();
/*
* The above sequence increase must be visible before the
* below count decrease but both values are read by the kvm
* page fault under mmu_lock spinlock so we don't need to add
* a smb_wmb() here in between the two.
* below count decrease, which is ensured by the smp_wmb above
* in conjunction with the smp_rmb in mmu_notifier_retry().
*/
kvm->mmu_notifier_count--;
spin_unlock(&kvm->mmu_lock);
@ -378,13 +378,14 @@ static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn,
idx = srcu_read_lock(&kvm->srcu);
spin_lock(&kvm->mmu_lock);
young = kvm_age_hva(kvm, address);
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
young = kvm_age_hva(kvm, address);
if (young)
kvm_flush_remote_tlbs(kvm);
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
return young;
}
@ -449,7 +450,7 @@ static void kvm_init_memslots_id(struct kvm *kvm)
slots->id_to_index[i] = slots->memslots[i].id = i;
}
static struct kvm *kvm_create_vm(void)
static struct kvm *kvm_create_vm(unsigned long type)
{
int r, i;
struct kvm *kvm = kvm_arch_alloc_vm();
@ -457,7 +458,7 @@ static struct kvm *kvm_create_vm(void)
if (!kvm)
return ERR_PTR(-ENOMEM);
r = kvm_arch_init_vm(kvm);
r = kvm_arch_init_vm(kvm, type);
if (r)
goto out_err_nodisable;
@ -535,21 +536,13 @@ static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot)
static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
int i;
if (!dont || free->rmap != dont->rmap)
vfree(free->rmap);
if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
kvm_destroy_dirty_bitmap(free);
for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) {
if (!dont || free->lpage_info[i] != dont->lpage_info[i]) {
vfree(free->lpage_info[i]);
free->lpage_info[i] = NULL;
}
}
kvm_arch_free_memslot(free, dont);
free->npages = 0;
free->rmap = NULL;
@ -616,7 +609,6 @@ static int kvm_vm_release(struct inode *inode, struct file *filp)
return 0;
}
#ifndef CONFIG_S390
/*
* Allocation size is twice as large as the actual dirty bitmap size.
* This makes it possible to do double buffering: see x86's
@ -624,6 +616,7 @@ static int kvm_vm_release(struct inode *inode, struct file *filp)
*/
static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
{
#ifndef CONFIG_S390
unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
if (dirty_bytes > PAGE_SIZE)
@ -636,21 +629,8 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
memslot->dirty_bitmap_head = memslot->dirty_bitmap;
memslot->nr_dirty_pages = 0;
return 0;
}
#endif /* !CONFIG_S390 */
static struct kvm_memory_slot *
search_memslots(struct kvm_memslots *slots, gfn_t gfn)
{
struct kvm_memory_slot *memslot;
kvm_for_each_memslot(memslot, slots)
if (gfn >= memslot->base_gfn &&
gfn < memslot->base_gfn + memslot->npages)
return memslot;
return NULL;
return 0;
}
static int cmp_memslot(const void *slot1, const void *slot2)
@ -778,69 +758,24 @@ int __kvm_set_memory_region(struct kvm *kvm,
r = -ENOMEM;
/* Allocate if a slot is being created */
#ifndef CONFIG_S390
if (npages && !new.rmap) {
new.rmap = vzalloc(npages * sizeof(*new.rmap));
if (!new.rmap)
goto out_free;
if (npages && !old.npages) {
new.user_alloc = user_alloc;
new.userspace_addr = mem->userspace_addr;
}
if (!npages)
goto skip_lpage;
for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) {
unsigned long ugfn;
unsigned long j;
int lpages;
int level = i + 2;
/* Avoid unused variable warning if no large pages */
(void)level;
if (new.lpage_info[i])
continue;
lpages = 1 + ((base_gfn + npages - 1)
>> KVM_HPAGE_GFN_SHIFT(level));
lpages -= base_gfn >> KVM_HPAGE_GFN_SHIFT(level);
new.lpage_info[i] = vzalloc(lpages * sizeof(*new.lpage_info[i]));
if (!new.lpage_info[i])
#ifndef CONFIG_S390
new.rmap = vzalloc(npages * sizeof(*new.rmap));
if (!new.rmap)
goto out_free;
#endif /* not defined CONFIG_S390 */
if (kvm_arch_create_memslot(&new, npages))
goto out_free;
if (base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1))
new.lpage_info[i][0].write_count = 1;
if ((base_gfn+npages) & (KVM_PAGES_PER_HPAGE(level) - 1))
new.lpage_info[i][lpages - 1].write_count = 1;
ugfn = new.userspace_addr >> PAGE_SHIFT;
/*
* If the gfn and userspace address are not aligned wrt each
* other, or if explicitly asked to, disable large page
* support for this slot
*/
if ((base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) ||
!largepages_enabled)
for (j = 0; j < lpages; ++j)
new.lpage_info[i][j].write_count = 1;
}
skip_lpage:
/* Allocate page dirty bitmap if needed */
if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
if (kvm_create_dirty_bitmap(&new) < 0)
goto out_free;
/* destroy any largepage mappings for dirty tracking */
}
#else /* not defined CONFIG_S390 */
new.user_alloc = user_alloc;
if (user_alloc)
new.userspace_addr = mem->userspace_addr;
#endif /* not defined CONFIG_S390 */
if (!npages) {
struct kvm_memory_slot *slot;
@ -890,8 +825,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
if (!npages) {
new.rmap = NULL;
new.dirty_bitmap = NULL;
for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i)
new.lpage_info[i] = NULL;
memset(&new.arch, 0, sizeof(new.arch));
}
update_memslots(slots, &new);
@ -978,6 +912,11 @@ int kvm_get_dirty_log(struct kvm *kvm,
return r;
}
bool kvm_largepages_enabled(void)
{
return largepages_enabled;
}
void kvm_disable_largepages(void)
{
largepages_enabled = false;
@ -1031,12 +970,6 @@ int kvm_is_error_hva(unsigned long addr)
}
EXPORT_SYMBOL_GPL(kvm_is_error_hva);
static struct kvm_memory_slot *__gfn_to_memslot(struct kvm_memslots *slots,
gfn_t gfn)
{
return search_memslots(slots, gfn);
}
struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
{
return __gfn_to_memslot(kvm_memslots(kvm), gfn);
@ -1459,7 +1392,7 @@ int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
ghc->gpa = gpa;
ghc->generation = slots->generation;
ghc->memslot = __gfn_to_memslot(slots, gfn);
ghc->memslot = gfn_to_memslot(kvm, gfn);
ghc->hva = gfn_to_hva_many(ghc->memslot, gfn, NULL);
if (!kvm_is_error_hva(ghc->hva))
ghc->hva += offset;
@ -1657,7 +1590,7 @@ static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
page = virt_to_page(vcpu->kvm->coalesced_mmio_ring);
#endif
else
return VM_FAULT_SIGBUS;
return kvm_arch_vcpu_fault(vcpu, vmf);
get_page(page);
vmf->page = page;
return 0;
@ -1718,6 +1651,10 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
goto vcpu_destroy;
mutex_lock(&kvm->lock);
if (!kvm_vcpu_compatible(vcpu)) {
r = -EINVAL;
goto unlock_vcpu_destroy;
}
if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) {
r = -EINVAL;
goto unlock_vcpu_destroy;
@ -2198,12 +2135,12 @@ static struct file_operations kvm_vm_fops = {
.llseek = noop_llseek,
};
static int kvm_dev_ioctl_create_vm(void)
static int kvm_dev_ioctl_create_vm(unsigned long type)
{
int r;
struct kvm *kvm;
kvm = kvm_create_vm();
kvm = kvm_create_vm(type);
if (IS_ERR(kvm))
return PTR_ERR(kvm);
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
@ -2254,10 +2191,7 @@ static long kvm_dev_ioctl(struct file *filp,
r = KVM_API_VERSION;
break;
case KVM_CREATE_VM:
r = -EINVAL;
if (arg)
goto out;
r = kvm_dev_ioctl_create_vm();
r = kvm_dev_ioctl_create_vm(arg);
break;
case KVM_CHECK_EXTENSION:
r = kvm_dev_ioctl_check_extension_generic(arg);