mirror of https://gitee.com/openkylin/linux.git
4056 lines
105 KiB
C
4056 lines
105 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* hosting IBM Z kernel virtual machines (s390x)
|
|
*
|
|
* Copyright IBM Corp. 2008, 2018
|
|
*
|
|
* Author(s): Carsten Otte <cotte@de.ibm.com>
|
|
* Christian Borntraeger <borntraeger@de.ibm.com>
|
|
* Heiko Carstens <heiko.carstens@de.ibm.com>
|
|
* Christian Ehrhardt <ehrhardt@de.ibm.com>
|
|
* Jason J. Herne <jjherne@us.ibm.com>
|
|
*/
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/err.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/hrtimer.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kvm.h>
|
|
#include <linux/kvm_host.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/random.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/bitmap.h>
|
|
#include <linux/sched/signal.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/lowcore.h>
|
|
#include <asm/stp.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/gmap.h>
|
|
#include <asm/nmi.h>
|
|
#include <asm/switch_to.h>
|
|
#include <asm/isc.h>
|
|
#include <asm/sclp.h>
|
|
#include <asm/cpacf.h>
|
|
#include <asm/timex.h>
|
|
#include "kvm-s390.h"
|
|
#include "gaccess.h"
|
|
|
|
#define KMSG_COMPONENT "kvm-s390"
|
|
#undef pr_fmt
|
|
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
|
|
|
|
#define CREATE_TRACE_POINTS
|
|
#include "trace.h"
|
|
#include "trace-s390.h"
|
|
|
|
#define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */
|
|
#define LOCAL_IRQS 32
|
|
#define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
|
|
(KVM_MAX_VCPUS + LOCAL_IRQS))
|
|
|
|
#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
|
|
|
|
struct kvm_stats_debugfs_item debugfs_entries[] = {
|
|
{ "userspace_handled", VCPU_STAT(exit_userspace) },
|
|
{ "exit_null", VCPU_STAT(exit_null) },
|
|
{ "exit_validity", VCPU_STAT(exit_validity) },
|
|
{ "exit_stop_request", VCPU_STAT(exit_stop_request) },
|
|
{ "exit_external_request", VCPU_STAT(exit_external_request) },
|
|
{ "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
|
|
{ "exit_instruction", VCPU_STAT(exit_instruction) },
|
|
{ "exit_pei", VCPU_STAT(exit_pei) },
|
|
{ "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
|
|
{ "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
|
|
{ "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
|
|
{ "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
|
|
{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
|
|
{ "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
|
|
{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
|
|
{ "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
|
|
{ "instruction_lctl", VCPU_STAT(instruction_lctl) },
|
|
{ "instruction_stctl", VCPU_STAT(instruction_stctl) },
|
|
{ "instruction_stctg", VCPU_STAT(instruction_stctg) },
|
|
{ "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
|
|
{ "deliver_external_call", VCPU_STAT(deliver_external_call) },
|
|
{ "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
|
|
{ "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) },
|
|
{ "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
|
|
{ "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
|
|
{ "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
|
|
{ "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
|
|
{ "exit_wait_state", VCPU_STAT(exit_wait_state) },
|
|
{ "instruction_epsw", VCPU_STAT(instruction_epsw) },
|
|
{ "instruction_gs", VCPU_STAT(instruction_gs) },
|
|
{ "instruction_io_other", VCPU_STAT(instruction_io_other) },
|
|
{ "instruction_lpsw", VCPU_STAT(instruction_lpsw) },
|
|
{ "instruction_lpswe", VCPU_STAT(instruction_lpswe) },
|
|
{ "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
|
|
{ "instruction_ptff", VCPU_STAT(instruction_ptff) },
|
|
{ "instruction_stidp", VCPU_STAT(instruction_stidp) },
|
|
{ "instruction_sck", VCPU_STAT(instruction_sck) },
|
|
{ "instruction_sckpf", VCPU_STAT(instruction_sckpf) },
|
|
{ "instruction_spx", VCPU_STAT(instruction_spx) },
|
|
{ "instruction_stpx", VCPU_STAT(instruction_stpx) },
|
|
{ "instruction_stap", VCPU_STAT(instruction_stap) },
|
|
{ "instruction_iske", VCPU_STAT(instruction_iske) },
|
|
{ "instruction_ri", VCPU_STAT(instruction_ri) },
|
|
{ "instruction_rrbe", VCPU_STAT(instruction_rrbe) },
|
|
{ "instruction_sske", VCPU_STAT(instruction_sske) },
|
|
{ "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
|
|
{ "instruction_essa", VCPU_STAT(instruction_essa) },
|
|
{ "instruction_stsi", VCPU_STAT(instruction_stsi) },
|
|
{ "instruction_stfl", VCPU_STAT(instruction_stfl) },
|
|
{ "instruction_tb", VCPU_STAT(instruction_tb) },
|
|
{ "instruction_tpi", VCPU_STAT(instruction_tpi) },
|
|
{ "instruction_tprot", VCPU_STAT(instruction_tprot) },
|
|
{ "instruction_tsch", VCPU_STAT(instruction_tsch) },
|
|
{ "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
|
|
{ "instruction_sie", VCPU_STAT(instruction_sie) },
|
|
{ "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
|
|
{ "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
|
|
{ "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
|
|
{ "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
|
|
{ "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
|
|
{ "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
|
|
{ "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
|
|
{ "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
|
|
{ "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
|
|
{ "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
|
|
{ "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
|
|
{ "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
|
|
{ "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
|
|
{ "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) },
|
|
{ "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) },
|
|
{ "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) },
|
|
{ "instruction_diag_10", VCPU_STAT(diagnose_10) },
|
|
{ "instruction_diag_44", VCPU_STAT(diagnose_44) },
|
|
{ "instruction_diag_9c", VCPU_STAT(diagnose_9c) },
|
|
{ "instruction_diag_258", VCPU_STAT(diagnose_258) },
|
|
{ "instruction_diag_308", VCPU_STAT(diagnose_308) },
|
|
{ "instruction_diag_500", VCPU_STAT(diagnose_500) },
|
|
{ "instruction_diag_other", VCPU_STAT(diagnose_other) },
|
|
{ NULL }
|
|
};
|
|
|
|
struct kvm_s390_tod_clock_ext {
|
|
__u8 epoch_idx;
|
|
__u64 tod;
|
|
__u8 reserved[7];
|
|
} __packed;
|
|
|
|
/* allow nested virtualization in KVM (if enabled by user space) */
|
|
static int nested;
|
|
module_param(nested, int, S_IRUGO);
|
|
MODULE_PARM_DESC(nested, "Nested virtualization support");
|
|
|
|
/* upper facilities limit for kvm */
|
|
unsigned long kvm_s390_fac_list_mask[16] = { FACILITIES_KVM };
|
|
|
|
unsigned long kvm_s390_fac_list_mask_size(void)
|
|
{
|
|
BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64);
|
|
return ARRAY_SIZE(kvm_s390_fac_list_mask);
|
|
}
|
|
|
|
/* available cpu features supported by kvm */
|
|
static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
|
|
/* available subfunctions indicated via query / "test bit" */
|
|
static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;
|
|
|
|
static struct gmap_notifier gmap_notifier;
|
|
static struct gmap_notifier vsie_gmap_notifier;
|
|
debug_info_t *kvm_s390_dbf;
|
|
|
|
/* Section: not file related */
|
|
int kvm_arch_hardware_enable(void)
|
|
{
|
|
/* every s390 is virtualization enabled ;-) */
|
|
return 0;
|
|
}
|
|
|
|
static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
|
|
unsigned long end);
|
|
|
|
/*
|
|
* This callback is executed during stop_machine(). All CPUs are therefore
|
|
* temporarily stopped. In order not to change guest behavior, we have to
|
|
* disable preemption whenever we touch the epoch of kvm and the VCPUs,
|
|
* so a CPU won't be stopped while calculating with the epoch.
|
|
*/
|
|
static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
|
|
void *v)
|
|
{
|
|
struct kvm *kvm;
|
|
struct kvm_vcpu *vcpu;
|
|
int i;
|
|
unsigned long long *delta = v;
|
|
|
|
list_for_each_entry(kvm, &vm_list, vm_list) {
|
|
kvm->arch.epoch -= *delta;
|
|
kvm_for_each_vcpu(i, vcpu, kvm) {
|
|
vcpu->arch.sie_block->epoch -= *delta;
|
|
if (vcpu->arch.cputm_enabled)
|
|
vcpu->arch.cputm_start += *delta;
|
|
if (vcpu->arch.vsie_block)
|
|
vcpu->arch.vsie_block->epoch -= *delta;
|
|
}
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block kvm_clock_notifier = {
|
|
.notifier_call = kvm_clock_sync,
|
|
};
|
|
|
|
int kvm_arch_hardware_setup(void)
|
|
{
|
|
gmap_notifier.notifier_call = kvm_gmap_notifier;
|
|
gmap_register_pte_notifier(&gmap_notifier);
|
|
vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier;
|
|
gmap_register_pte_notifier(&vsie_gmap_notifier);
|
|
atomic_notifier_chain_register(&s390_epoch_delta_notifier,
|
|
&kvm_clock_notifier);
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_hardware_unsetup(void)
|
|
{
|
|
gmap_unregister_pte_notifier(&gmap_notifier);
|
|
gmap_unregister_pte_notifier(&vsie_gmap_notifier);
|
|
atomic_notifier_chain_unregister(&s390_epoch_delta_notifier,
|
|
&kvm_clock_notifier);
|
|
}
|
|
|
|
static void allow_cpu_feat(unsigned long nr)
|
|
{
|
|
set_bit_inv(nr, kvm_s390_available_cpu_feat);
|
|
}
|
|
|
|
static inline int plo_test_bit(unsigned char nr)
|
|
{
|
|
register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
|
|
int cc;
|
|
|
|
asm volatile(
|
|
/* Parameter registers are ignored for "test bit" */
|
|
" plo 0,0,0,0(0)\n"
|
|
" ipm %0\n"
|
|
" srl %0,28\n"
|
|
: "=d" (cc)
|
|
: "d" (r0)
|
|
: "cc");
|
|
return cc == 0;
|
|
}
|
|
|
|
static void kvm_s390_cpu_feat_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 256; ++i) {
|
|
if (plo_test_bit(i))
|
|
kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7);
|
|
}
|
|
|
|
if (test_facility(28)) /* TOD-clock steering */
|
|
ptff(kvm_s390_available_subfunc.ptff,
|
|
sizeof(kvm_s390_available_subfunc.ptff),
|
|
PTFF_QAF);
|
|
|
|
if (test_facility(17)) { /* MSA */
|
|
__cpacf_query(CPACF_KMAC, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.kmac);
|
|
__cpacf_query(CPACF_KMC, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.kmc);
|
|
__cpacf_query(CPACF_KM, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.km);
|
|
__cpacf_query(CPACF_KIMD, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.kimd);
|
|
__cpacf_query(CPACF_KLMD, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.klmd);
|
|
}
|
|
if (test_facility(76)) /* MSA3 */
|
|
__cpacf_query(CPACF_PCKMO, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.pckmo);
|
|
if (test_facility(77)) { /* MSA4 */
|
|
__cpacf_query(CPACF_KMCTR, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.kmctr);
|
|
__cpacf_query(CPACF_KMF, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.kmf);
|
|
__cpacf_query(CPACF_KMO, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.kmo);
|
|
__cpacf_query(CPACF_PCC, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.pcc);
|
|
}
|
|
if (test_facility(57)) /* MSA5 */
|
|
__cpacf_query(CPACF_PRNO, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.ppno);
|
|
|
|
if (test_facility(146)) /* MSA8 */
|
|
__cpacf_query(CPACF_KMA, (cpacf_mask_t *)
|
|
kvm_s390_available_subfunc.kma);
|
|
|
|
if (MACHINE_HAS_ESOP)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
|
|
/*
|
|
* We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
|
|
* 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
|
|
*/
|
|
if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
|
|
!test_facility(3) || !nested)
|
|
return;
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
|
|
if (sclp.has_64bscao)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
|
|
if (sclp.has_siif)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
|
|
if (sclp.has_gpere)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE);
|
|
if (sclp.has_gsls)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
|
|
if (sclp.has_ib)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
|
|
if (sclp.has_cei)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
|
|
if (sclp.has_ibs)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
|
|
if (sclp.has_kss)
|
|
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS);
|
|
/*
|
|
* KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
|
|
* all skey handling functions read/set the skey from the PGSTE
|
|
* instead of the real storage key.
|
|
*
|
|
* KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make
|
|
* pages being detected as preserved although they are resident.
|
|
*
|
|
* KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will
|
|
* have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY.
|
|
*
|
|
* For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and
|
|
* KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be
|
|
* correctly shadowed. We can do that for the PGSTE but not for PTE.I.
|
|
*
|
|
* KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We
|
|
* cannot easily shadow the SCA because of the ipte lock.
|
|
*/
|
|
}
|
|
|
|
int kvm_arch_init(void *opaque)
|
|
{
|
|
kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
|
|
if (!kvm_s390_dbf)
|
|
return -ENOMEM;
|
|
|
|
if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
|
|
debug_unregister(kvm_s390_dbf);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
kvm_s390_cpu_feat_init();
|
|
|
|
/* Register floating interrupt controller interface. */
|
|
return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
|
|
}
|
|
|
|
void kvm_arch_exit(void)
|
|
{
|
|
debug_unregister(kvm_s390_dbf);
|
|
}
|
|
|
|
/* Section: device related */
|
|
long kvm_arch_dev_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
if (ioctl == KVM_S390_ENABLE_SIE)
|
|
return s390_enable_sie();
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
|
|
{
|
|
int r;
|
|
|
|
switch (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_ASYNC_PF:
|
|
case KVM_CAP_SYNC_REGS:
|
|
case KVM_CAP_ONE_REG:
|
|
case KVM_CAP_ENABLE_CAP:
|
|
case KVM_CAP_S390_CSS_SUPPORT:
|
|
case KVM_CAP_IOEVENTFD:
|
|
case KVM_CAP_DEVICE_CTRL:
|
|
case KVM_CAP_ENABLE_CAP_VM:
|
|
case KVM_CAP_S390_IRQCHIP:
|
|
case KVM_CAP_VM_ATTRIBUTES:
|
|
case KVM_CAP_MP_STATE:
|
|
case KVM_CAP_IMMEDIATE_EXIT:
|
|
case KVM_CAP_S390_INJECT_IRQ:
|
|
case KVM_CAP_S390_USER_SIGP:
|
|
case KVM_CAP_S390_USER_STSI:
|
|
case KVM_CAP_S390_SKEYS:
|
|
case KVM_CAP_S390_IRQ_STATE:
|
|
case KVM_CAP_S390_USER_INSTR0:
|
|
case KVM_CAP_S390_CMMA_MIGRATION:
|
|
case KVM_CAP_S390_AIS:
|
|
case KVM_CAP_S390_AIS_MIGRATION:
|
|
r = 1;
|
|
break;
|
|
case KVM_CAP_S390_MEM_OP:
|
|
r = MEM_OP_MAX_SIZE;
|
|
break;
|
|
case KVM_CAP_NR_VCPUS:
|
|
case KVM_CAP_MAX_VCPUS:
|
|
r = KVM_S390_BSCA_CPU_SLOTS;
|
|
if (!kvm_s390_use_sca_entries())
|
|
r = KVM_MAX_VCPUS;
|
|
else if (sclp.has_esca && sclp.has_64bscao)
|
|
r = KVM_S390_ESCA_CPU_SLOTS;
|
|
break;
|
|
case KVM_CAP_NR_MEMSLOTS:
|
|
r = KVM_USER_MEM_SLOTS;
|
|
break;
|
|
case KVM_CAP_S390_COW:
|
|
r = MACHINE_HAS_ESOP;
|
|
break;
|
|
case KVM_CAP_S390_VECTOR_REGISTERS:
|
|
r = MACHINE_HAS_VX;
|
|
break;
|
|
case KVM_CAP_S390_RI:
|
|
r = test_facility(64);
|
|
break;
|
|
case KVM_CAP_S390_GS:
|
|
r = test_facility(133);
|
|
break;
|
|
case KVM_CAP_S390_BPB:
|
|
r = test_facility(82);
|
|
break;
|
|
default:
|
|
r = 0;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static void kvm_s390_sync_dirty_log(struct kvm *kvm,
|
|
struct kvm_memory_slot *memslot)
|
|
{
|
|
gfn_t cur_gfn, last_gfn;
|
|
unsigned long address;
|
|
struct gmap *gmap = kvm->arch.gmap;
|
|
|
|
/* Loop over all guest pages */
|
|
last_gfn = memslot->base_gfn + memslot->npages;
|
|
for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) {
|
|
address = gfn_to_hva_memslot(memslot, cur_gfn);
|
|
|
|
if (test_and_clear_guest_dirty(gmap->mm, address))
|
|
mark_page_dirty(kvm, cur_gfn);
|
|
if (fatal_signal_pending(current))
|
|
return;
|
|
cond_resched();
|
|
}
|
|
}
|
|
|
|
/* Section: vm related */
|
|
static void sca_del_vcpu(struct kvm_vcpu *vcpu);
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
int r;
|
|
unsigned long n;
|
|
struct kvm_memslots *slots;
|
|
struct kvm_memory_slot *memslot;
|
|
int is_dirty = 0;
|
|
|
|
if (kvm_is_ucontrol(kvm))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&kvm->slots_lock);
|
|
|
|
r = -EINVAL;
|
|
if (log->slot >= KVM_USER_MEM_SLOTS)
|
|
goto out;
|
|
|
|
slots = kvm_memslots(kvm);
|
|
memslot = id_to_memslot(slots, log->slot);
|
|
r = -ENOENT;
|
|
if (!memslot->dirty_bitmap)
|
|
goto out;
|
|
|
|
kvm_s390_sync_dirty_log(kvm, memslot);
|
|
r = kvm_get_dirty_log(kvm, log, &is_dirty);
|
|
if (r)
|
|
goto out;
|
|
|
|
/* Clear the dirty log */
|
|
if (is_dirty) {
|
|
n = kvm_dirty_bitmap_bytes(memslot);
|
|
memset(memslot->dirty_bitmap, 0, n);
|
|
}
|
|
r = 0;
|
|
out:
|
|
mutex_unlock(&kvm->slots_lock);
|
|
return r;
|
|
}
|
|
|
|
static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
|
|
{
|
|
unsigned int i;
|
|
struct kvm_vcpu *vcpu;
|
|
|
|
kvm_for_each_vcpu(i, vcpu, kvm) {
|
|
kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu);
|
|
}
|
|
}
|
|
|
|
static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
|
|
{
|
|
int r;
|
|
|
|
if (cap->flags)
|
|
return -EINVAL;
|
|
|
|
switch (cap->cap) {
|
|
case KVM_CAP_S390_IRQCHIP:
|
|
VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
|
|
kvm->arch.use_irqchip = 1;
|
|
r = 0;
|
|
break;
|
|
case KVM_CAP_S390_USER_SIGP:
|
|
VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
|
|
kvm->arch.user_sigp = 1;
|
|
r = 0;
|
|
break;
|
|
case KVM_CAP_S390_VECTOR_REGISTERS:
|
|
mutex_lock(&kvm->lock);
|
|
if (kvm->created_vcpus) {
|
|
r = -EBUSY;
|
|
} else if (MACHINE_HAS_VX) {
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 129);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 129);
|
|
if (test_facility(134)) {
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 134);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 134);
|
|
}
|
|
if (test_facility(135)) {
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 135);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 135);
|
|
}
|
|
r = 0;
|
|
} else
|
|
r = -EINVAL;
|
|
mutex_unlock(&kvm->lock);
|
|
VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
|
|
r ? "(not available)" : "(success)");
|
|
break;
|
|
case KVM_CAP_S390_RI:
|
|
r = -EINVAL;
|
|
mutex_lock(&kvm->lock);
|
|
if (kvm->created_vcpus) {
|
|
r = -EBUSY;
|
|
} else if (test_facility(64)) {
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 64);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 64);
|
|
r = 0;
|
|
}
|
|
mutex_unlock(&kvm->lock);
|
|
VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
|
|
r ? "(not available)" : "(success)");
|
|
break;
|
|
case KVM_CAP_S390_AIS:
|
|
mutex_lock(&kvm->lock);
|
|
if (kvm->created_vcpus) {
|
|
r = -EBUSY;
|
|
} else {
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 72);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 72);
|
|
r = 0;
|
|
}
|
|
mutex_unlock(&kvm->lock);
|
|
VM_EVENT(kvm, 3, "ENABLE: AIS %s",
|
|
r ? "(not available)" : "(success)");
|
|
break;
|
|
case KVM_CAP_S390_GS:
|
|
r = -EINVAL;
|
|
mutex_lock(&kvm->lock);
|
|
if (kvm->created_vcpus) {
|
|
r = -EBUSY;
|
|
} else if (test_facility(133)) {
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 133);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 133);
|
|
r = 0;
|
|
}
|
|
mutex_unlock(&kvm->lock);
|
|
VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s",
|
|
r ? "(not available)" : "(success)");
|
|
break;
|
|
case KVM_CAP_S390_USER_STSI:
|
|
VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
|
|
kvm->arch.user_stsi = 1;
|
|
r = 0;
|
|
break;
|
|
case KVM_CAP_S390_USER_INSTR0:
|
|
VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0");
|
|
kvm->arch.user_instr0 = 1;
|
|
icpt_operexc_on_all_vcpus(kvm);
|
|
r = 0;
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret;
|
|
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_MEM_LIMIT_SIZE:
|
|
ret = 0;
|
|
VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
|
|
kvm->arch.mem_limit);
|
|
if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
|
|
ret = -EFAULT;
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret;
|
|
unsigned int idx;
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_MEM_ENABLE_CMMA:
|
|
ret = -ENXIO;
|
|
if (!sclp.has_cmma)
|
|
break;
|
|
|
|
ret = -EBUSY;
|
|
VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
|
|
mutex_lock(&kvm->lock);
|
|
if (!kvm->created_vcpus) {
|
|
kvm->arch.use_cmma = 1;
|
|
ret = 0;
|
|
}
|
|
mutex_unlock(&kvm->lock);
|
|
break;
|
|
case KVM_S390_VM_MEM_CLR_CMMA:
|
|
ret = -ENXIO;
|
|
if (!sclp.has_cmma)
|
|
break;
|
|
ret = -EINVAL;
|
|
if (!kvm->arch.use_cmma)
|
|
break;
|
|
|
|
VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
|
|
mutex_lock(&kvm->lock);
|
|
idx = srcu_read_lock(&kvm->srcu);
|
|
s390_reset_cmma(kvm->arch.gmap->mm);
|
|
srcu_read_unlock(&kvm->srcu, idx);
|
|
mutex_unlock(&kvm->lock);
|
|
ret = 0;
|
|
break;
|
|
case KVM_S390_VM_MEM_LIMIT_SIZE: {
|
|
unsigned long new_limit;
|
|
|
|
if (kvm_is_ucontrol(kvm))
|
|
return -EINVAL;
|
|
|
|
if (get_user(new_limit, (u64 __user *)attr->addr))
|
|
return -EFAULT;
|
|
|
|
if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
|
|
new_limit > kvm->arch.mem_limit)
|
|
return -E2BIG;
|
|
|
|
if (!new_limit)
|
|
return -EINVAL;
|
|
|
|
/* gmap_create takes last usable address */
|
|
if (new_limit != KVM_S390_NO_MEM_LIMIT)
|
|
new_limit -= 1;
|
|
|
|
ret = -EBUSY;
|
|
mutex_lock(&kvm->lock);
|
|
if (!kvm->created_vcpus) {
|
|
/* gmap_create will round the limit up */
|
|
struct gmap *new = gmap_create(current->mm, new_limit);
|
|
|
|
if (!new) {
|
|
ret = -ENOMEM;
|
|
} else {
|
|
gmap_remove(kvm->arch.gmap);
|
|
new->private = kvm;
|
|
kvm->arch.gmap = new;
|
|
ret = 0;
|
|
}
|
|
}
|
|
mutex_unlock(&kvm->lock);
|
|
VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit);
|
|
VM_EVENT(kvm, 3, "New guest asce: 0x%pK",
|
|
(void *) kvm->arch.gmap->asce);
|
|
break;
|
|
}
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);
|
|
|
|
static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
int i;
|
|
|
|
if (!test_kvm_facility(kvm, 76))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&kvm->lock);
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
|
|
get_random_bytes(
|
|
kvm->arch.crypto.crycb->aes_wrapping_key_mask,
|
|
sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
|
|
kvm->arch.crypto.aes_kw = 1;
|
|
VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
|
|
break;
|
|
case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
|
|
get_random_bytes(
|
|
kvm->arch.crypto.crycb->dea_wrapping_key_mask,
|
|
sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
|
|
kvm->arch.crypto.dea_kw = 1;
|
|
VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
|
|
break;
|
|
case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
|
|
kvm->arch.crypto.aes_kw = 0;
|
|
memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0,
|
|
sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
|
|
VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
|
|
break;
|
|
case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
|
|
kvm->arch.crypto.dea_kw = 0;
|
|
memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0,
|
|
sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
|
|
VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
|
|
break;
|
|
default:
|
|
mutex_unlock(&kvm->lock);
|
|
return -ENXIO;
|
|
}
|
|
|
|
kvm_for_each_vcpu(i, vcpu, kvm) {
|
|
kvm_s390_vcpu_crypto_setup(vcpu);
|
|
exit_sie(vcpu);
|
|
}
|
|
mutex_unlock(&kvm->lock);
|
|
return 0;
|
|
}
|
|
|
|
static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req)
|
|
{
|
|
int cx;
|
|
struct kvm_vcpu *vcpu;
|
|
|
|
kvm_for_each_vcpu(cx, vcpu, kvm)
|
|
kvm_s390_sync_request(req, vcpu);
|
|
}
|
|
|
|
/*
|
|
* Must be called with kvm->srcu held to avoid races on memslots, and with
|
|
* kvm->slots_lock to avoid races with ourselves and kvm_s390_vm_stop_migration.
|
|
*/
|
|
static int kvm_s390_vm_start_migration(struct kvm *kvm)
|
|
{
|
|
struct kvm_s390_migration_state *mgs;
|
|
struct kvm_memory_slot *ms;
|
|
/* should be the only one */
|
|
struct kvm_memslots *slots;
|
|
unsigned long ram_pages;
|
|
int slotnr;
|
|
|
|
/* migration mode already enabled */
|
|
if (kvm->arch.migration_state)
|
|
return 0;
|
|
|
|
slots = kvm_memslots(kvm);
|
|
if (!slots || !slots->used_slots)
|
|
return -EINVAL;
|
|
|
|
mgs = kzalloc(sizeof(*mgs), GFP_KERNEL);
|
|
if (!mgs)
|
|
return -ENOMEM;
|
|
kvm->arch.migration_state = mgs;
|
|
|
|
if (kvm->arch.use_cmma) {
|
|
/*
|
|
* Get the first slot. They are reverse sorted by base_gfn, so
|
|
* the first slot is also the one at the end of the address
|
|
* space. We have verified above that at least one slot is
|
|
* present.
|
|
*/
|
|
ms = slots->memslots;
|
|
/* round up so we only use full longs */
|
|
ram_pages = roundup(ms->base_gfn + ms->npages, BITS_PER_LONG);
|
|
/* allocate enough bytes to store all the bits */
|
|
mgs->pgste_bitmap = vmalloc(ram_pages / 8);
|
|
if (!mgs->pgste_bitmap) {
|
|
kfree(mgs);
|
|
kvm->arch.migration_state = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mgs->bitmap_size = ram_pages;
|
|
atomic64_set(&mgs->dirty_pages, ram_pages);
|
|
/* mark all the pages in active slots as dirty */
|
|
for (slotnr = 0; slotnr < slots->used_slots; slotnr++) {
|
|
ms = slots->memslots + slotnr;
|
|
bitmap_set(mgs->pgste_bitmap, ms->base_gfn, ms->npages);
|
|
}
|
|
|
|
kvm_s390_sync_request_broadcast(kvm, KVM_REQ_START_MIGRATION);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Must be called with kvm->slots_lock to avoid races with ourselves and
|
|
* kvm_s390_vm_start_migration.
|
|
*/
|
|
static int kvm_s390_vm_stop_migration(struct kvm *kvm)
|
|
{
|
|
struct kvm_s390_migration_state *mgs;
|
|
|
|
/* migration mode already disabled */
|
|
if (!kvm->arch.migration_state)
|
|
return 0;
|
|
mgs = kvm->arch.migration_state;
|
|
kvm->arch.migration_state = NULL;
|
|
|
|
if (kvm->arch.use_cmma) {
|
|
kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION);
|
|
/* We have to wait for the essa emulation to finish */
|
|
synchronize_srcu(&kvm->srcu);
|
|
vfree(mgs->pgste_bitmap);
|
|
}
|
|
kfree(mgs);
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_vm_set_migration(struct kvm *kvm,
|
|
struct kvm_device_attr *attr)
|
|
{
|
|
int res = -ENXIO;
|
|
|
|
mutex_lock(&kvm->slots_lock);
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_MIGRATION_START:
|
|
res = kvm_s390_vm_start_migration(kvm);
|
|
break;
|
|
case KVM_S390_VM_MIGRATION_STOP:
|
|
res = kvm_s390_vm_stop_migration(kvm);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
mutex_unlock(&kvm->slots_lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int kvm_s390_vm_get_migration(struct kvm *kvm,
|
|
struct kvm_device_attr *attr)
|
|
{
|
|
u64 mig = (kvm->arch.migration_state != NULL);
|
|
|
|
if (attr->attr != KVM_S390_VM_MIGRATION_STATUS)
|
|
return -ENXIO;
|
|
|
|
if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_s390_vm_tod_clock gtod;
|
|
|
|
if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod)))
|
|
return -EFAULT;
|
|
|
|
if (test_kvm_facility(kvm, 139))
|
|
kvm_s390_set_tod_clock_ext(kvm, >od);
|
|
else if (gtod.epoch_idx == 0)
|
|
kvm_s390_set_tod_clock(kvm, gtod.tod);
|
|
else
|
|
return -EINVAL;
|
|
|
|
VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx",
|
|
gtod.epoch_idx, gtod.tod);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
u8 gtod_high;
|
|
|
|
if (copy_from_user(>od_high, (void __user *)attr->addr,
|
|
sizeof(gtod_high)))
|
|
return -EFAULT;
|
|
|
|
if (gtod_high != 0)
|
|
return -EINVAL;
|
|
VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
u64 gtod;
|
|
|
|
if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod)))
|
|
return -EFAULT;
|
|
|
|
kvm_s390_set_tod_clock(kvm, gtod);
|
|
VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod);
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret;
|
|
|
|
if (attr->flags)
|
|
return -EINVAL;
|
|
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_TOD_EXT:
|
|
ret = kvm_s390_set_tod_ext(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_TOD_HIGH:
|
|
ret = kvm_s390_set_tod_high(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_TOD_LOW:
|
|
ret = kvm_s390_set_tod_low(kvm, attr);
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void kvm_s390_get_tod_clock_ext(struct kvm *kvm,
|
|
struct kvm_s390_vm_tod_clock *gtod)
|
|
{
|
|
struct kvm_s390_tod_clock_ext htod;
|
|
|
|
preempt_disable();
|
|
|
|
get_tod_clock_ext((char *)&htod);
|
|
|
|
gtod->tod = htod.tod + kvm->arch.epoch;
|
|
gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;
|
|
|
|
if (gtod->tod < htod.tod)
|
|
gtod->epoch_idx += 1;
|
|
|
|
preempt_enable();
|
|
}
|
|
|
|
static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_s390_vm_tod_clock gtod;
|
|
|
|
memset(>od, 0, sizeof(gtod));
|
|
|
|
if (test_kvm_facility(kvm, 139))
|
|
kvm_s390_get_tod_clock_ext(kvm, >od);
|
|
else
|
|
gtod.tod = kvm_s390_get_tod_clock_fast(kvm);
|
|
|
|
if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
|
|
return -EFAULT;
|
|
|
|
VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x, TOD base: 0x%llx",
|
|
gtod.epoch_idx, gtod.tod);
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
u8 gtod_high = 0;
|
|
|
|
if (copy_to_user((void __user *)attr->addr, >od_high,
|
|
sizeof(gtod_high)))
|
|
return -EFAULT;
|
|
VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
u64 gtod;
|
|
|
|
gtod = kvm_s390_get_tod_clock_fast(kvm);
|
|
if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
|
|
return -EFAULT;
|
|
VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret;
|
|
|
|
if (attr->flags)
|
|
return -EINVAL;
|
|
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_TOD_EXT:
|
|
ret = kvm_s390_get_tod_ext(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_TOD_HIGH:
|
|
ret = kvm_s390_get_tod_high(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_TOD_LOW:
|
|
ret = kvm_s390_get_tod_low(kvm, attr);
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_s390_vm_cpu_processor *proc;
|
|
u16 lowest_ibc, unblocked_ibc;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&kvm->lock);
|
|
if (kvm->created_vcpus) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
proc = kzalloc(sizeof(*proc), GFP_KERNEL);
|
|
if (!proc) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
if (!copy_from_user(proc, (void __user *)attr->addr,
|
|
sizeof(*proc))) {
|
|
kvm->arch.model.cpuid = proc->cpuid;
|
|
lowest_ibc = sclp.ibc >> 16 & 0xfff;
|
|
unblocked_ibc = sclp.ibc & 0xfff;
|
|
if (lowest_ibc && proc->ibc) {
|
|
if (proc->ibc > unblocked_ibc)
|
|
kvm->arch.model.ibc = unblocked_ibc;
|
|
else if (proc->ibc < lowest_ibc)
|
|
kvm->arch.model.ibc = lowest_ibc;
|
|
else
|
|
kvm->arch.model.ibc = proc->ibc;
|
|
}
|
|
memcpy(kvm->arch.model.fac_list, proc->fac_list,
|
|
S390_ARCH_FAC_LIST_SIZE_BYTE);
|
|
VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
|
|
kvm->arch.model.ibc,
|
|
kvm->arch.model.cpuid);
|
|
VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
|
|
kvm->arch.model.fac_list[0],
|
|
kvm->arch.model.fac_list[1],
|
|
kvm->arch.model.fac_list[2]);
|
|
} else
|
|
ret = -EFAULT;
|
|
kfree(proc);
|
|
out:
|
|
mutex_unlock(&kvm->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_set_processor_feat(struct kvm *kvm,
|
|
struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_s390_vm_cpu_feat data;
|
|
|
|
if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
|
|
return -EFAULT;
|
|
if (!bitmap_subset((unsigned long *) data.feat,
|
|
kvm_s390_available_cpu_feat,
|
|
KVM_S390_VM_CPU_FEAT_NR_BITS))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&kvm->lock);
|
|
if (kvm->created_vcpus) {
|
|
mutex_unlock(&kvm->lock);
|
|
return -EBUSY;
|
|
}
|
|
bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
|
|
KVM_S390_VM_CPU_FEAT_NR_BITS);
|
|
mutex_unlock(&kvm->lock);
|
|
VM_EVENT(kvm, 3, "SET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
|
|
data.feat[0],
|
|
data.feat[1],
|
|
data.feat[2]);
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
|
|
struct kvm_device_attr *attr)
|
|
{
|
|
/*
|
|
* Once supported by kernel + hw, we have to store the subfunctions
|
|
* in kvm->arch and remember that user space configured them.
|
|
*/
|
|
return -ENXIO;
|
|
}
|
|
|
|
static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret = -ENXIO;
|
|
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_CPU_PROCESSOR:
|
|
ret = kvm_s390_set_processor(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_PROCESSOR_FEAT:
|
|
ret = kvm_s390_set_processor_feat(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
|
|
ret = kvm_s390_set_processor_subfunc(kvm, attr);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_s390_vm_cpu_processor *proc;
|
|
int ret = 0;
|
|
|
|
proc = kzalloc(sizeof(*proc), GFP_KERNEL);
|
|
if (!proc) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
proc->cpuid = kvm->arch.model.cpuid;
|
|
proc->ibc = kvm->arch.model.ibc;
|
|
memcpy(&proc->fac_list, kvm->arch.model.fac_list,
|
|
S390_ARCH_FAC_LIST_SIZE_BYTE);
|
|
VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
|
|
kvm->arch.model.ibc,
|
|
kvm->arch.model.cpuid);
|
|
VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
|
|
kvm->arch.model.fac_list[0],
|
|
kvm->arch.model.fac_list[1],
|
|
kvm->arch.model.fac_list[2]);
|
|
if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
|
|
ret = -EFAULT;
|
|
kfree(proc);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_s390_vm_cpu_machine *mach;
|
|
int ret = 0;
|
|
|
|
mach = kzalloc(sizeof(*mach), GFP_KERNEL);
|
|
if (!mach) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
get_cpu_id((struct cpuid *) &mach->cpuid);
|
|
mach->ibc = sclp.ibc;
|
|
memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
|
|
S390_ARCH_FAC_LIST_SIZE_BYTE);
|
|
memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
|
|
sizeof(S390_lowcore.stfle_fac_list));
|
|
VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx",
|
|
kvm->arch.model.ibc,
|
|
kvm->arch.model.cpuid);
|
|
VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx",
|
|
mach->fac_mask[0],
|
|
mach->fac_mask[1],
|
|
mach->fac_mask[2]);
|
|
VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx",
|
|
mach->fac_list[0],
|
|
mach->fac_list[1],
|
|
mach->fac_list[2]);
|
|
if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
|
|
ret = -EFAULT;
|
|
kfree(mach);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_get_processor_feat(struct kvm *kvm,
|
|
struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_s390_vm_cpu_feat data;
|
|
|
|
bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat,
|
|
KVM_S390_VM_CPU_FEAT_NR_BITS);
|
|
if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
|
|
return -EFAULT;
|
|
VM_EVENT(kvm, 3, "GET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
|
|
data.feat[0],
|
|
data.feat[1],
|
|
data.feat[2]);
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_get_machine_feat(struct kvm *kvm,
|
|
struct kvm_device_attr *attr)
|
|
{
|
|
struct kvm_s390_vm_cpu_feat data;
|
|
|
|
bitmap_copy((unsigned long *) data.feat,
|
|
kvm_s390_available_cpu_feat,
|
|
KVM_S390_VM_CPU_FEAT_NR_BITS);
|
|
if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
|
|
return -EFAULT;
|
|
VM_EVENT(kvm, 3, "GET: host feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
|
|
data.feat[0],
|
|
data.feat[1],
|
|
data.feat[2]);
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
|
|
struct kvm_device_attr *attr)
|
|
{
|
|
/*
|
|
* Once we can actually configure subfunctions (kernel + hw support),
|
|
* we have to check if they were already set by user space, if so copy
|
|
* them from kvm->arch.
|
|
*/
|
|
return -ENXIO;
|
|
}
|
|
|
|
static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
|
|
struct kvm_device_attr *attr)
|
|
{
|
|
if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
|
|
sizeof(struct kvm_s390_vm_cpu_subfunc)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret = -ENXIO;
|
|
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_CPU_PROCESSOR:
|
|
ret = kvm_s390_get_processor(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_MACHINE:
|
|
ret = kvm_s390_get_machine(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_PROCESSOR_FEAT:
|
|
ret = kvm_s390_get_processor_feat(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_MACHINE_FEAT:
|
|
ret = kvm_s390_get_machine_feat(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
|
|
ret = kvm_s390_get_processor_subfunc(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
|
|
ret = kvm_s390_get_machine_subfunc(kvm, attr);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret;
|
|
|
|
switch (attr->group) {
|
|
case KVM_S390_VM_MEM_CTRL:
|
|
ret = kvm_s390_set_mem_control(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_TOD:
|
|
ret = kvm_s390_set_tod(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_MODEL:
|
|
ret = kvm_s390_set_cpu_model(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CRYPTO:
|
|
ret = kvm_s390_vm_set_crypto(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_MIGRATION:
|
|
ret = kvm_s390_vm_set_migration(kvm, attr);
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret;
|
|
|
|
switch (attr->group) {
|
|
case KVM_S390_VM_MEM_CTRL:
|
|
ret = kvm_s390_get_mem_control(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_TOD:
|
|
ret = kvm_s390_get_tod(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_CPU_MODEL:
|
|
ret = kvm_s390_get_cpu_model(kvm, attr);
|
|
break;
|
|
case KVM_S390_VM_MIGRATION:
|
|
ret = kvm_s390_vm_get_migration(kvm, attr);
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
|
|
{
|
|
int ret;
|
|
|
|
switch (attr->group) {
|
|
case KVM_S390_VM_MEM_CTRL:
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_MEM_ENABLE_CMMA:
|
|
case KVM_S390_VM_MEM_CLR_CMMA:
|
|
ret = sclp.has_cmma ? 0 : -ENXIO;
|
|
break;
|
|
case KVM_S390_VM_MEM_LIMIT_SIZE:
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
break;
|
|
case KVM_S390_VM_TOD:
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_TOD_LOW:
|
|
case KVM_S390_VM_TOD_HIGH:
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
break;
|
|
case KVM_S390_VM_CPU_MODEL:
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_CPU_PROCESSOR:
|
|
case KVM_S390_VM_CPU_MACHINE:
|
|
case KVM_S390_VM_CPU_PROCESSOR_FEAT:
|
|
case KVM_S390_VM_CPU_MACHINE_FEAT:
|
|
case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
|
|
ret = 0;
|
|
break;
|
|
/* configuring subfunctions is not supported yet */
|
|
case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
break;
|
|
case KVM_S390_VM_CRYPTO:
|
|
switch (attr->attr) {
|
|
case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
|
|
case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
|
|
case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
|
|
case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
break;
|
|
case KVM_S390_VM_MIGRATION:
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = -ENXIO;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
|
|
{
|
|
uint8_t *keys;
|
|
uint64_t hva;
|
|
int srcu_idx, i, r = 0;
|
|
|
|
if (args->flags != 0)
|
|
return -EINVAL;
|
|
|
|
/* Is this guest using storage keys? */
|
|
if (!mm_use_skey(current->mm))
|
|
return KVM_S390_GET_SKEYS_NONE;
|
|
|
|
/* Enforce sane limit on memory allocation */
|
|
if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
|
|
return -EINVAL;
|
|
|
|
keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
|
|
if (!keys)
|
|
return -ENOMEM;
|
|
|
|
down_read(¤t->mm->mmap_sem);
|
|
srcu_idx = srcu_read_lock(&kvm->srcu);
|
|
for (i = 0; i < args->count; i++) {
|
|
hva = gfn_to_hva(kvm, args->start_gfn + i);
|
|
if (kvm_is_error_hva(hva)) {
|
|
r = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
r = get_guest_storage_key(current->mm, hva, &keys[i]);
|
|
if (r)
|
|
break;
|
|
}
|
|
srcu_read_unlock(&kvm->srcu, srcu_idx);
|
|
up_read(¤t->mm->mmap_sem);
|
|
|
|
if (!r) {
|
|
r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
|
|
sizeof(uint8_t) * args->count);
|
|
if (r)
|
|
r = -EFAULT;
|
|
}
|
|
|
|
kvfree(keys);
|
|
return r;
|
|
}
|
|
|
|
static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
|
|
{
|
|
uint8_t *keys;
|
|
uint64_t hva;
|
|
int srcu_idx, i, r = 0;
|
|
|
|
if (args->flags != 0)
|
|
return -EINVAL;
|
|
|
|
/* Enforce sane limit on memory allocation */
|
|
if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
|
|
return -EINVAL;
|
|
|
|
keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
|
|
if (!keys)
|
|
return -ENOMEM;
|
|
|
|
r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
|
|
sizeof(uint8_t) * args->count);
|
|
if (r) {
|
|
r = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
/* Enable storage key handling for the guest */
|
|
r = s390_enable_skey();
|
|
if (r)
|
|
goto out;
|
|
|
|
down_read(¤t->mm->mmap_sem);
|
|
srcu_idx = srcu_read_lock(&kvm->srcu);
|
|
for (i = 0; i < args->count; i++) {
|
|
hva = gfn_to_hva(kvm, args->start_gfn + i);
|
|
if (kvm_is_error_hva(hva)) {
|
|
r = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
/* Lowest order bit is reserved */
|
|
if (keys[i] & 0x01) {
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
r = set_guest_storage_key(current->mm, hva, keys[i], 0);
|
|
if (r)
|
|
break;
|
|
}
|
|
srcu_read_unlock(&kvm->srcu, srcu_idx);
|
|
up_read(¤t->mm->mmap_sem);
|
|
out:
|
|
kvfree(keys);
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Base address and length must be sent at the start of each block, therefore
|
|
* it's cheaper to send some clean data, as long as it's less than the size of
|
|
* two longs.
|
|
*/
|
|
#define KVM_S390_MAX_BIT_DISTANCE (2 * sizeof(void *))
|
|
/* for consistency */
|
|
#define KVM_S390_CMMA_SIZE_MAX ((u32)KVM_S390_SKEYS_MAX)
|
|
|
|
/*
|
|
* This function searches for the next page with dirty CMMA attributes, and
|
|
* saves the attributes in the buffer up to either the end of the buffer or
|
|
* until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found;
|
|
* no trailing clean bytes are saved.
|
|
* In case no dirty bits were found, or if CMMA was not enabled or used, the
|
|
* output buffer will indicate 0 as length.
|
|
*/
|
|
static int kvm_s390_get_cmma_bits(struct kvm *kvm,
|
|
struct kvm_s390_cmma_log *args)
|
|
{
|
|
struct kvm_s390_migration_state *s = kvm->arch.migration_state;
|
|
unsigned long bufsize, hva, pgstev, i, next, cur;
|
|
int srcu_idx, peek, r = 0, rr;
|
|
u8 *res;
|
|
|
|
cur = args->start_gfn;
|
|
i = next = pgstev = 0;
|
|
|
|
if (unlikely(!kvm->arch.use_cmma))
|
|
return -ENXIO;
|
|
/* Invalid/unsupported flags were specified */
|
|
if (args->flags & ~KVM_S390_CMMA_PEEK)
|
|
return -EINVAL;
|
|
/* Migration mode query, and we are not doing a migration */
|
|
peek = !!(args->flags & KVM_S390_CMMA_PEEK);
|
|
if (!peek && !s)
|
|
return -EINVAL;
|
|
/* CMMA is disabled or was not used, or the buffer has length zero */
|
|
bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX);
|
|
if (!bufsize || !kvm->mm->context.use_cmma) {
|
|
memset(args, 0, sizeof(*args));
|
|
return 0;
|
|
}
|
|
|
|
if (!peek) {
|
|
/* We are not peeking, and there are no dirty pages */
|
|
if (!atomic64_read(&s->dirty_pages)) {
|
|
memset(args, 0, sizeof(*args));
|
|
return 0;
|
|
}
|
|
cur = find_next_bit(s->pgste_bitmap, s->bitmap_size,
|
|
args->start_gfn);
|
|
if (cur >= s->bitmap_size) /* nothing found, loop back */
|
|
cur = find_next_bit(s->pgste_bitmap, s->bitmap_size, 0);
|
|
if (cur >= s->bitmap_size) { /* again! (very unlikely) */
|
|
memset(args, 0, sizeof(*args));
|
|
return 0;
|
|
}
|
|
next = find_next_bit(s->pgste_bitmap, s->bitmap_size, cur + 1);
|
|
}
|
|
|
|
res = vmalloc(bufsize);
|
|
if (!res)
|
|
return -ENOMEM;
|
|
|
|
args->start_gfn = cur;
|
|
|
|
down_read(&kvm->mm->mmap_sem);
|
|
srcu_idx = srcu_read_lock(&kvm->srcu);
|
|
while (i < bufsize) {
|
|
hva = gfn_to_hva(kvm, cur);
|
|
if (kvm_is_error_hva(hva)) {
|
|
r = -EFAULT;
|
|
break;
|
|
}
|
|
/* decrement only if we actually flipped the bit to 0 */
|
|
if (!peek && test_and_clear_bit(cur, s->pgste_bitmap))
|
|
atomic64_dec(&s->dirty_pages);
|
|
r = get_pgste(kvm->mm, hva, &pgstev);
|
|
if (r < 0)
|
|
pgstev = 0;
|
|
/* save the value */
|
|
res[i++] = (pgstev >> 24) & 0x43;
|
|
/*
|
|
* if the next bit is too far away, stop.
|
|
* if we reached the previous "next", find the next one
|
|
*/
|
|
if (!peek) {
|
|
if (next > cur + KVM_S390_MAX_BIT_DISTANCE)
|
|
break;
|
|
if (cur == next)
|
|
next = find_next_bit(s->pgste_bitmap,
|
|
s->bitmap_size, cur + 1);
|
|
/* reached the end of the bitmap or of the buffer, stop */
|
|
if ((next >= s->bitmap_size) ||
|
|
(next >= args->start_gfn + bufsize))
|
|
break;
|
|
}
|
|
cur++;
|
|
}
|
|
srcu_read_unlock(&kvm->srcu, srcu_idx);
|
|
up_read(&kvm->mm->mmap_sem);
|
|
args->count = i;
|
|
args->remaining = s ? atomic64_read(&s->dirty_pages) : 0;
|
|
|
|
rr = copy_to_user((void __user *)args->values, res, args->count);
|
|
if (rr)
|
|
r = -EFAULT;
|
|
|
|
vfree(res);
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* This function sets the CMMA attributes for the given pages. If the input
|
|
* buffer has zero length, no action is taken, otherwise the attributes are
|
|
* set and the mm->context.use_cmma flag is set.
|
|
*/
|
|
static int kvm_s390_set_cmma_bits(struct kvm *kvm,
|
|
const struct kvm_s390_cmma_log *args)
|
|
{
|
|
unsigned long hva, mask, pgstev, i;
|
|
uint8_t *bits;
|
|
int srcu_idx, r = 0;
|
|
|
|
mask = args->mask;
|
|
|
|
if (!kvm->arch.use_cmma)
|
|
return -ENXIO;
|
|
/* invalid/unsupported flags */
|
|
if (args->flags != 0)
|
|
return -EINVAL;
|
|
/* Enforce sane limit on memory allocation */
|
|
if (args->count > KVM_S390_CMMA_SIZE_MAX)
|
|
return -EINVAL;
|
|
/* Nothing to do */
|
|
if (args->count == 0)
|
|
return 0;
|
|
|
|
bits = vmalloc(sizeof(*bits) * args->count);
|
|
if (!bits)
|
|
return -ENOMEM;
|
|
|
|
r = copy_from_user(bits, (void __user *)args->values, args->count);
|
|
if (r) {
|
|
r = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
down_read(&kvm->mm->mmap_sem);
|
|
srcu_idx = srcu_read_lock(&kvm->srcu);
|
|
for (i = 0; i < args->count; i++) {
|
|
hva = gfn_to_hva(kvm, args->start_gfn + i);
|
|
if (kvm_is_error_hva(hva)) {
|
|
r = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
pgstev = bits[i];
|
|
pgstev = pgstev << 24;
|
|
mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT;
|
|
set_pgste_bits(kvm->mm, hva, mask, pgstev);
|
|
}
|
|
srcu_read_unlock(&kvm->srcu, srcu_idx);
|
|
up_read(&kvm->mm->mmap_sem);
|
|
|
|
if (!kvm->mm->context.use_cmma) {
|
|
down_write(&kvm->mm->mmap_sem);
|
|
kvm->mm->context.use_cmma = 1;
|
|
up_write(&kvm->mm->mmap_sem);
|
|
}
|
|
out:
|
|
vfree(bits);
|
|
return r;
|
|
}
|
|
|
|
long kvm_arch_vm_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
struct kvm *kvm = filp->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
struct kvm_device_attr attr;
|
|
int r;
|
|
|
|
switch (ioctl) {
|
|
case KVM_S390_INTERRUPT: {
|
|
struct kvm_s390_interrupt s390int;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&s390int, argp, sizeof(s390int)))
|
|
break;
|
|
r = kvm_s390_inject_vm(kvm, &s390int);
|
|
break;
|
|
}
|
|
case KVM_ENABLE_CAP: {
|
|
struct kvm_enable_cap cap;
|
|
r = -EFAULT;
|
|
if (copy_from_user(&cap, argp, sizeof(cap)))
|
|
break;
|
|
r = kvm_vm_ioctl_enable_cap(kvm, &cap);
|
|
break;
|
|
}
|
|
case KVM_CREATE_IRQCHIP: {
|
|
struct kvm_irq_routing_entry routing;
|
|
|
|
r = -EINVAL;
|
|
if (kvm->arch.use_irqchip) {
|
|
/* Set up dummy routing. */
|
|
memset(&routing, 0, sizeof(routing));
|
|
r = kvm_set_irq_routing(kvm, &routing, 0, 0);
|
|
}
|
|
break;
|
|
}
|
|
case KVM_SET_DEVICE_ATTR: {
|
|
r = -EFAULT;
|
|
if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
|
|
break;
|
|
r = kvm_s390_vm_set_attr(kvm, &attr);
|
|
break;
|
|
}
|
|
case KVM_GET_DEVICE_ATTR: {
|
|
r = -EFAULT;
|
|
if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
|
|
break;
|
|
r = kvm_s390_vm_get_attr(kvm, &attr);
|
|
break;
|
|
}
|
|
case KVM_HAS_DEVICE_ATTR: {
|
|
r = -EFAULT;
|
|
if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
|
|
break;
|
|
r = kvm_s390_vm_has_attr(kvm, &attr);
|
|
break;
|
|
}
|
|
case KVM_S390_GET_SKEYS: {
|
|
struct kvm_s390_skeys args;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&args, argp,
|
|
sizeof(struct kvm_s390_skeys)))
|
|
break;
|
|
r = kvm_s390_get_skeys(kvm, &args);
|
|
break;
|
|
}
|
|
case KVM_S390_SET_SKEYS: {
|
|
struct kvm_s390_skeys args;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&args, argp,
|
|
sizeof(struct kvm_s390_skeys)))
|
|
break;
|
|
r = kvm_s390_set_skeys(kvm, &args);
|
|
break;
|
|
}
|
|
case KVM_S390_GET_CMMA_BITS: {
|
|
struct kvm_s390_cmma_log args;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&args, argp, sizeof(args)))
|
|
break;
|
|
mutex_lock(&kvm->slots_lock);
|
|
r = kvm_s390_get_cmma_bits(kvm, &args);
|
|
mutex_unlock(&kvm->slots_lock);
|
|
if (!r) {
|
|
r = copy_to_user(argp, &args, sizeof(args));
|
|
if (r)
|
|
r = -EFAULT;
|
|
}
|
|
break;
|
|
}
|
|
case KVM_S390_SET_CMMA_BITS: {
|
|
struct kvm_s390_cmma_log args;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&args, argp, sizeof(args)))
|
|
break;
|
|
mutex_lock(&kvm->slots_lock);
|
|
r = kvm_s390_set_cmma_bits(kvm, &args);
|
|
mutex_unlock(&kvm->slots_lock);
|
|
break;
|
|
}
|
|
default:
|
|
r = -ENOTTY;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int kvm_s390_query_ap_config(u8 *config)
|
|
{
|
|
u32 fcn_code = 0x04000000UL;
|
|
u32 cc = 0;
|
|
|
|
memset(config, 0, 128);
|
|
asm volatile(
|
|
"lgr 0,%1\n"
|
|
"lgr 2,%2\n"
|
|
".long 0xb2af0000\n" /* PQAP(QCI) */
|
|
"0: ipm %0\n"
|
|
"srl %0,28\n"
|
|
"1:\n"
|
|
EX_TABLE(0b, 1b)
|
|
: "+r" (cc)
|
|
: "r" (fcn_code), "r" (config)
|
|
: "cc", "0", "2", "memory"
|
|
);
|
|
|
|
return cc;
|
|
}
|
|
|
|
static int kvm_s390_apxa_installed(void)
|
|
{
|
|
u8 config[128];
|
|
int cc;
|
|
|
|
if (test_facility(12)) {
|
|
cc = kvm_s390_query_ap_config(config);
|
|
|
|
if (cc)
|
|
pr_err("PQAP(QCI) failed with cc=%d", cc);
|
|
else
|
|
return config[0] & 0x40;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void kvm_s390_set_crycb_format(struct kvm *kvm)
|
|
{
|
|
kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
|
|
|
|
if (kvm_s390_apxa_installed())
|
|
kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
|
|
else
|
|
kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
|
|
}
|
|
|
|
static u64 kvm_s390_get_initial_cpuid(void)
|
|
{
|
|
struct cpuid cpuid;
|
|
|
|
get_cpu_id(&cpuid);
|
|
cpuid.version = 0xff;
|
|
return *((u64 *) &cpuid);
|
|
}
|
|
|
|
static void kvm_s390_crypto_init(struct kvm *kvm)
|
|
{
|
|
if (!test_kvm_facility(kvm, 76))
|
|
return;
|
|
|
|
kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
|
|
kvm_s390_set_crycb_format(kvm);
|
|
|
|
/* Enable AES/DEA protected key functions by default */
|
|
kvm->arch.crypto.aes_kw = 1;
|
|
kvm->arch.crypto.dea_kw = 1;
|
|
get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
|
|
sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
|
|
get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
|
|
sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
|
|
}
|
|
|
|
static void sca_dispose(struct kvm *kvm)
|
|
{
|
|
if (kvm->arch.use_esca)
|
|
free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
|
|
else
|
|
free_page((unsigned long)(kvm->arch.sca));
|
|
kvm->arch.sca = NULL;
|
|
}
|
|
|
|
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
|
|
{
|
|
gfp_t alloc_flags = GFP_KERNEL;
|
|
int i, rc;
|
|
char debug_name[16];
|
|
static unsigned long sca_offset;
|
|
|
|
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;
|
|
|
|
rc = -ENOMEM;
|
|
|
|
kvm->arch.use_esca = 0; /* start with basic SCA */
|
|
if (!sclp.has_64bscao)
|
|
alloc_flags |= GFP_DMA;
|
|
rwlock_init(&kvm->arch.sca_lock);
|
|
kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
|
|
if (!kvm->arch.sca)
|
|
goto out_err;
|
|
spin_lock(&kvm_lock);
|
|
sca_offset += 16;
|
|
if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
|
|
sca_offset = 0;
|
|
kvm->arch.sca = (struct bsca_block *)
|
|
((char *) kvm->arch.sca + sca_offset);
|
|
spin_unlock(&kvm_lock);
|
|
|
|
sprintf(debug_name, "kvm-%u", current->pid);
|
|
|
|
kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
|
|
if (!kvm->arch.dbf)
|
|
goto out_err;
|
|
|
|
BUILD_BUG_ON(sizeof(struct sie_page2) != 4096);
|
|
kvm->arch.sie_page2 =
|
|
(struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
if (!kvm->arch.sie_page2)
|
|
goto out_err;
|
|
|
|
/* Populate the facility mask initially. */
|
|
memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list,
|
|
sizeof(S390_lowcore.stfle_fac_list));
|
|
for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) {
|
|
if (i < kvm_s390_fac_list_mask_size())
|
|
kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i];
|
|
else
|
|
kvm->arch.model.fac_mask[i] = 0UL;
|
|
}
|
|
|
|
/* Populate the facility list initially. */
|
|
kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
|
|
memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask,
|
|
S390_ARCH_FAC_LIST_SIZE_BYTE);
|
|
|
|
/* we are always in czam mode - even on pre z14 machines */
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 138);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 138);
|
|
/* we emulate STHYI in kvm */
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 74);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 74);
|
|
if (MACHINE_HAS_TLB_GUEST) {
|
|
set_kvm_facility(kvm->arch.model.fac_mask, 147);
|
|
set_kvm_facility(kvm->arch.model.fac_list, 147);
|
|
}
|
|
|
|
kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
|
|
kvm->arch.model.ibc = sclp.ibc & 0x0fff;
|
|
|
|
kvm_s390_crypto_init(kvm);
|
|
|
|
mutex_init(&kvm->arch.float_int.ais_lock);
|
|
kvm->arch.float_int.simm = 0;
|
|
kvm->arch.float_int.nimm = 0;
|
|
spin_lock_init(&kvm->arch.float_int.lock);
|
|
for (i = 0; i < FIRQ_LIST_COUNT; i++)
|
|
INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
|
|
init_waitqueue_head(&kvm->arch.ipte_wq);
|
|
mutex_init(&kvm->arch.ipte_mutex);
|
|
|
|
debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
|
|
VM_EVENT(kvm, 3, "vm created with type %lu", type);
|
|
|
|
if (type & KVM_VM_S390_UCONTROL) {
|
|
kvm->arch.gmap = NULL;
|
|
kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
|
|
} else {
|
|
if (sclp.hamax == U64_MAX)
|
|
kvm->arch.mem_limit = TASK_SIZE_MAX;
|
|
else
|
|
kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX,
|
|
sclp.hamax + 1);
|
|
kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
|
|
if (!kvm->arch.gmap)
|
|
goto out_err;
|
|
kvm->arch.gmap->private = kvm;
|
|
kvm->arch.gmap->pfault_enabled = 0;
|
|
}
|
|
|
|
kvm->arch.css_support = 0;
|
|
kvm->arch.use_irqchip = 0;
|
|
kvm->arch.epoch = 0;
|
|
|
|
spin_lock_init(&kvm->arch.start_stop_lock);
|
|
kvm_s390_vsie_init(kvm);
|
|
kvm_s390_gisa_init(kvm);
|
|
KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
|
|
|
|
return 0;
|
|
out_err:
|
|
free_page((unsigned long)kvm->arch.sie_page2);
|
|
debug_unregister(kvm->arch.dbf);
|
|
sca_dispose(kvm);
|
|
KVM_EVENT(3, "creation of vm failed: %d", rc);
|
|
return rc;
|
|
}
|
|
|
|
bool kvm_arch_has_vcpu_debugfs(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
|
|
{
|
|
VCPU_EVENT(vcpu, 3, "%s", "free cpu");
|
|
trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
|
|
kvm_s390_clear_local_irqs(vcpu);
|
|
kvm_clear_async_pf_completion_queue(vcpu);
|
|
if (!kvm_is_ucontrol(vcpu->kvm))
|
|
sca_del_vcpu(vcpu);
|
|
|
|
if (kvm_is_ucontrol(vcpu->kvm))
|
|
gmap_remove(vcpu->arch.gmap);
|
|
|
|
if (vcpu->kvm->arch.use_cmma)
|
|
kvm_s390_vcpu_unsetup_cmma(vcpu);
|
|
free_page((unsigned long)(vcpu->arch.sie_block));
|
|
|
|
kvm_vcpu_uninit(vcpu);
|
|
kmem_cache_free(kvm_vcpu_cache, vcpu);
|
|
}
|
|
|
|
static void kvm_free_vcpus(struct kvm *kvm)
|
|
{
|
|
unsigned int i;
|
|
struct kvm_vcpu *vcpu;
|
|
|
|
kvm_for_each_vcpu(i, vcpu, kvm)
|
|
kvm_arch_vcpu_destroy(vcpu);
|
|
|
|
mutex_lock(&kvm->lock);
|
|
for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
|
|
kvm->vcpus[i] = NULL;
|
|
|
|
atomic_set(&kvm->online_vcpus, 0);
|
|
mutex_unlock(&kvm->lock);
|
|
}
|
|
|
|
void kvm_arch_destroy_vm(struct kvm *kvm)
|
|
{
|
|
kvm_free_vcpus(kvm);
|
|
sca_dispose(kvm);
|
|
debug_unregister(kvm->arch.dbf);
|
|
kvm_s390_gisa_destroy(kvm);
|
|
free_page((unsigned long)kvm->arch.sie_page2);
|
|
if (!kvm_is_ucontrol(kvm))
|
|
gmap_remove(kvm->arch.gmap);
|
|
kvm_s390_destroy_adapters(kvm);
|
|
kvm_s390_clear_float_irqs(kvm);
|
|
kvm_s390_vsie_destroy(kvm);
|
|
if (kvm->arch.migration_state) {
|
|
vfree(kvm->arch.migration_state->pgste_bitmap);
|
|
kfree(kvm->arch.migration_state);
|
|
}
|
|
KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
|
|
}
|
|
|
|
/* Section: vcpu related */
|
|
static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
|
|
{
|
|
vcpu->arch.gmap = gmap_create(current->mm, -1UL);
|
|
if (!vcpu->arch.gmap)
|
|
return -ENOMEM;
|
|
vcpu->arch.gmap->private = vcpu->kvm;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sca_del_vcpu(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (!kvm_s390_use_sca_entries())
|
|
return;
|
|
read_lock(&vcpu->kvm->arch.sca_lock);
|
|
if (vcpu->kvm->arch.use_esca) {
|
|
struct esca_block *sca = vcpu->kvm->arch.sca;
|
|
|
|
clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
|
|
sca->cpu[vcpu->vcpu_id].sda = 0;
|
|
} else {
|
|
struct bsca_block *sca = vcpu->kvm->arch.sca;
|
|
|
|
clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
|
|
sca->cpu[vcpu->vcpu_id].sda = 0;
|
|
}
|
|
read_unlock(&vcpu->kvm->arch.sca_lock);
|
|
}
|
|
|
|
static void sca_add_vcpu(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (!kvm_s390_use_sca_entries()) {
|
|
struct bsca_block *sca = vcpu->kvm->arch.sca;
|
|
|
|
/* we still need the basic sca for the ipte control */
|
|
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
|
|
vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
|
|
}
|
|
read_lock(&vcpu->kvm->arch.sca_lock);
|
|
if (vcpu->kvm->arch.use_esca) {
|
|
struct esca_block *sca = vcpu->kvm->arch.sca;
|
|
|
|
sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
|
|
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
|
|
vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
|
|
vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
|
|
set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
|
|
} else {
|
|
struct bsca_block *sca = vcpu->kvm->arch.sca;
|
|
|
|
sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
|
|
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
|
|
vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
|
|
set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
|
|
}
|
|
read_unlock(&vcpu->kvm->arch.sca_lock);
|
|
}
|
|
|
|
/* Basic SCA to Extended SCA data copy routines */
|
|
static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
|
|
{
|
|
d->sda = s->sda;
|
|
d->sigp_ctrl.c = s->sigp_ctrl.c;
|
|
d->sigp_ctrl.scn = s->sigp_ctrl.scn;
|
|
}
|
|
|
|
static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
|
|
{
|
|
int i;
|
|
|
|
d->ipte_control = s->ipte_control;
|
|
d->mcn[0] = s->mcn;
|
|
for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
|
|
sca_copy_entry(&d->cpu[i], &s->cpu[i]);
|
|
}
|
|
|
|
static int sca_switch_to_extended(struct kvm *kvm)
|
|
{
|
|
struct bsca_block *old_sca = kvm->arch.sca;
|
|
struct esca_block *new_sca;
|
|
struct kvm_vcpu *vcpu;
|
|
unsigned int vcpu_idx;
|
|
u32 scaol, scaoh;
|
|
|
|
new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
|
|
if (!new_sca)
|
|
return -ENOMEM;
|
|
|
|
scaoh = (u32)((u64)(new_sca) >> 32);
|
|
scaol = (u32)(u64)(new_sca) & ~0x3fU;
|
|
|
|
kvm_s390_vcpu_block_all(kvm);
|
|
write_lock(&kvm->arch.sca_lock);
|
|
|
|
sca_copy_b_to_e(new_sca, old_sca);
|
|
|
|
kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
|
|
vcpu->arch.sie_block->scaoh = scaoh;
|
|
vcpu->arch.sie_block->scaol = scaol;
|
|
vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
|
|
}
|
|
kvm->arch.sca = new_sca;
|
|
kvm->arch.use_esca = 1;
|
|
|
|
write_unlock(&kvm->arch.sca_lock);
|
|
kvm_s390_vcpu_unblock_all(kvm);
|
|
|
|
free_page((unsigned long)old_sca);
|
|
|
|
VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
|
|
old_sca, kvm->arch.sca);
|
|
return 0;
|
|
}
|
|
|
|
static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
|
|
{
|
|
int rc;
|
|
|
|
if (!kvm_s390_use_sca_entries()) {
|
|
if (id < KVM_MAX_VCPUS)
|
|
return true;
|
|
return false;
|
|
}
|
|
if (id < KVM_S390_BSCA_CPU_SLOTS)
|
|
return true;
|
|
if (!sclp.has_esca || !sclp.has_64bscao)
|
|
return false;
|
|
|
|
mutex_lock(&kvm->lock);
|
|
rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
|
|
}
|
|
|
|
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
|
|
{
|
|
vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
|
|
kvm_clear_async_pf_completion_queue(vcpu);
|
|
vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
|
|
KVM_SYNC_GPRS |
|
|
KVM_SYNC_ACRS |
|
|
KVM_SYNC_CRS |
|
|
KVM_SYNC_ARCH0 |
|
|
KVM_SYNC_PFAULT;
|
|
kvm_s390_set_prefix(vcpu, 0);
|
|
if (test_kvm_facility(vcpu->kvm, 64))
|
|
vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
|
|
if (test_kvm_facility(vcpu->kvm, 82))
|
|
vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC;
|
|
if (test_kvm_facility(vcpu->kvm, 133))
|
|
vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
|
|
/* fprs can be synchronized via vrs, even if the guest has no vx. With
|
|
* MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
|
|
*/
|
|
if (MACHINE_HAS_VX)
|
|
vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
|
|
else
|
|
vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
|
|
|
|
if (kvm_is_ucontrol(vcpu->kvm))
|
|
return __kvm_ucontrol_vcpu_init(vcpu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
|
|
static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
|
|
{
|
|
WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
|
|
raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
|
|
vcpu->arch.cputm_start = get_tod_clock_fast();
|
|
raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
|
|
}
|
|
|
|
/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
|
|
static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
|
|
{
|
|
WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
|
|
raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
|
|
vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
|
|
vcpu->arch.cputm_start = 0;
|
|
raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
|
|
}
|
|
|
|
/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
|
|
static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
|
|
{
|
|
WARN_ON_ONCE(vcpu->arch.cputm_enabled);
|
|
vcpu->arch.cputm_enabled = true;
|
|
__start_cpu_timer_accounting(vcpu);
|
|
}
|
|
|
|
/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
|
|
static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
|
|
{
|
|
WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
|
|
__stop_cpu_timer_accounting(vcpu);
|
|
vcpu->arch.cputm_enabled = false;
|
|
}
|
|
|
|
static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
|
|
{
|
|
preempt_disable(); /* protect from TOD sync and vcpu_load/put */
|
|
__enable_cpu_timer_accounting(vcpu);
|
|
preempt_enable();
|
|
}
|
|
|
|
static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
|
|
{
|
|
preempt_disable(); /* protect from TOD sync and vcpu_load/put */
|
|
__disable_cpu_timer_accounting(vcpu);
|
|
preempt_enable();
|
|
}
|
|
|
|
/* set the cpu timer - may only be called from the VCPU thread itself */
|
|
void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
|
|
{
|
|
preempt_disable(); /* protect from TOD sync and vcpu_load/put */
|
|
raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
|
|
if (vcpu->arch.cputm_enabled)
|
|
vcpu->arch.cputm_start = get_tod_clock_fast();
|
|
vcpu->arch.sie_block->cputm = cputm;
|
|
raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
|
|
preempt_enable();
|
|
}
|
|
|
|
/* update and get the cpu timer - can also be called from other VCPU threads */
|
|
__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned int seq;
|
|
__u64 value;
|
|
|
|
if (unlikely(!vcpu->arch.cputm_enabled))
|
|
return vcpu->arch.sie_block->cputm;
|
|
|
|
preempt_disable(); /* protect from TOD sync and vcpu_load/put */
|
|
do {
|
|
seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
|
|
/*
|
|
* If the writer would ever execute a read in the critical
|
|
* section, e.g. in irq context, we have a deadlock.
|
|
*/
|
|
WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu);
|
|
value = vcpu->arch.sie_block->cputm;
|
|
/* if cputm_start is 0, accounting is being started/stopped */
|
|
if (likely(vcpu->arch.cputm_start))
|
|
value -= get_tod_clock_fast() - vcpu->arch.cputm_start;
|
|
} while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1));
|
|
preempt_enable();
|
|
return value;
|
|
}
|
|
|
|
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
|
|
{
|
|
|
|
gmap_enable(vcpu->arch.enabled_gmap);
|
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_RUNNING);
|
|
if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
|
|
__start_cpu_timer_accounting(vcpu);
|
|
vcpu->cpu = cpu;
|
|
}
|
|
|
|
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
|
|
{
|
|
vcpu->cpu = -1;
|
|
if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
|
|
__stop_cpu_timer_accounting(vcpu);
|
|
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING);
|
|
vcpu->arch.enabled_gmap = gmap_get_enabled();
|
|
gmap_disable(vcpu->arch.enabled_gmap);
|
|
|
|
}
|
|
|
|
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;
|
|
kvm_s390_set_prefix(vcpu, 0);
|
|
kvm_s390_set_cpu_timer(vcpu, 0);
|
|
vcpu->arch.sie_block->ckc = 0UL;
|
|
vcpu->arch.sie_block->todpr = 0;
|
|
memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
|
|
vcpu->arch.sie_block->gcr[0] = 0xE0UL;
|
|
vcpu->arch.sie_block->gcr[14] = 0xC2000000UL;
|
|
/* make sure the new fpc will be lazily loaded */
|
|
save_fpu_regs();
|
|
current->thread.fpu.fpc = 0;
|
|
vcpu->arch.sie_block->gbea = 1;
|
|
vcpu->arch.sie_block->pp = 0;
|
|
vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
|
|
vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
|
|
kvm_clear_async_pf_completion_queue(vcpu);
|
|
if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
|
|
kvm_s390_vcpu_stop(vcpu);
|
|
kvm_s390_clear_local_irqs(vcpu);
|
|
}
|
|
|
|
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
|
|
{
|
|
mutex_lock(&vcpu->kvm->lock);
|
|
preempt_disable();
|
|
vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
|
|
preempt_enable();
|
|
mutex_unlock(&vcpu->kvm->lock);
|
|
if (!kvm_is_ucontrol(vcpu->kvm)) {
|
|
vcpu->arch.gmap = vcpu->kvm->arch.gmap;
|
|
sca_add_vcpu(vcpu);
|
|
}
|
|
if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
|
|
vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
|
|
/* make vcpu_load load the right gmap on the first trigger */
|
|
vcpu->arch.enabled_gmap = vcpu->arch.gmap;
|
|
}
|
|
|
|
static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (!test_kvm_facility(vcpu->kvm, 76))
|
|
return;
|
|
|
|
vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);
|
|
|
|
if (vcpu->kvm->arch.crypto.aes_kw)
|
|
vcpu->arch.sie_block->ecb3 |= ECB3_AES;
|
|
if (vcpu->kvm->arch.crypto.dea_kw)
|
|
vcpu->arch.sie_block->ecb3 |= ECB3_DEA;
|
|
|
|
vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
|
|
}
|
|
|
|
void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
|
|
{
|
|
free_page(vcpu->arch.sie_block->cbrlo);
|
|
vcpu->arch.sie_block->cbrlo = 0;
|
|
}
|
|
|
|
int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
|
|
{
|
|
vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
|
|
if (!vcpu->arch.sie_block->cbrlo)
|
|
return -ENOMEM;
|
|
|
|
vcpu->arch.sie_block->ecb2 &= ~ECB2_PFMFI;
|
|
return 0;
|
|
}
|
|
|
|
static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
|
|
|
|
vcpu->arch.sie_block->ibc = model->ibc;
|
|
if (test_kvm_facility(vcpu->kvm, 7))
|
|
vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
|
|
}
|
|
|
|
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
|
|
{
|
|
int rc = 0;
|
|
|
|
atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
|
|
CPUSTAT_SM |
|
|
CPUSTAT_STOPPED);
|
|
|
|
if (test_kvm_facility(vcpu->kvm, 78))
|
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED2);
|
|
else if (test_kvm_facility(vcpu->kvm, 8))
|
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED);
|
|
|
|
kvm_s390_vcpu_setup_model(vcpu);
|
|
|
|
/* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
|
|
if (MACHINE_HAS_ESOP)
|
|
vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT;
|
|
if (test_kvm_facility(vcpu->kvm, 9))
|
|
vcpu->arch.sie_block->ecb |= ECB_SRSI;
|
|
if (test_kvm_facility(vcpu->kvm, 73))
|
|
vcpu->arch.sie_block->ecb |= ECB_TE;
|
|
|
|
if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
|
|
vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI;
|
|
if (test_kvm_facility(vcpu->kvm, 130))
|
|
vcpu->arch.sie_block->ecb2 |= ECB2_IEP;
|
|
vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI;
|
|
if (sclp.has_cei)
|
|
vcpu->arch.sie_block->eca |= ECA_CEI;
|
|
if (sclp.has_ib)
|
|
vcpu->arch.sie_block->eca |= ECA_IB;
|
|
if (sclp.has_siif)
|
|
vcpu->arch.sie_block->eca |= ECA_SII;
|
|
if (sclp.has_sigpif)
|
|
vcpu->arch.sie_block->eca |= ECA_SIGPI;
|
|
if (test_kvm_facility(vcpu->kvm, 129)) {
|
|
vcpu->arch.sie_block->eca |= ECA_VX;
|
|
vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
|
|
}
|
|
if (test_kvm_facility(vcpu->kvm, 139))
|
|
vcpu->arch.sie_block->ecd |= ECD_MEF;
|
|
|
|
if (vcpu->arch.sie_block->gd) {
|
|
vcpu->arch.sie_block->eca |= ECA_AIV;
|
|
VCPU_EVENT(vcpu, 3, "AIV gisa format-%u enabled for cpu %03u",
|
|
vcpu->arch.sie_block->gd & 0x3, vcpu->vcpu_id);
|
|
}
|
|
vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
|
|
| SDNXC;
|
|
vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
|
|
|
|
if (sclp.has_kss)
|
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_KSS);
|
|
else
|
|
vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
|
|
|
|
if (vcpu->kvm->arch.use_cmma) {
|
|
rc = kvm_s390_vcpu_setup_cmma(vcpu);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
|
vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
|
|
|
|
kvm_s390_vcpu_crypto_setup(vcpu);
|
|
|
|
return rc;
|
|
}
|
|
|
|
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
|
|
unsigned int id)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
struct sie_page *sie_page;
|
|
int rc = -EINVAL;
|
|
|
|
if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
|
|
goto out;
|
|
|
|
rc = -ENOMEM;
|
|
|
|
vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
|
|
if (!vcpu)
|
|
goto out;
|
|
|
|
BUILD_BUG_ON(sizeof(struct sie_page) != 4096);
|
|
sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
|
|
if (!sie_page)
|
|
goto out_free_cpu;
|
|
|
|
vcpu->arch.sie_block = &sie_page->sie_block;
|
|
vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
|
|
|
|
/* the real guest size will always be smaller than msl */
|
|
vcpu->arch.sie_block->mso = 0;
|
|
vcpu->arch.sie_block->msl = sclp.hamax;
|
|
|
|
vcpu->arch.sie_block->icpua = id;
|
|
spin_lock_init(&vcpu->arch.local_int.lock);
|
|
vcpu->arch.sie_block->gd = (u32)(u64)kvm->arch.gisa;
|
|
if (vcpu->arch.sie_block->gd && sclp.has_gisaf)
|
|
vcpu->arch.sie_block->gd |= GISA_FORMAT1;
|
|
seqcount_init(&vcpu->arch.cputm_seqcount);
|
|
|
|
rc = kvm_vcpu_init(vcpu, kvm, id);
|
|
if (rc)
|
|
goto out_free_sie_block;
|
|
VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu,
|
|
vcpu->arch.sie_block);
|
|
trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block);
|
|
|
|
return vcpu;
|
|
out_free_sie_block:
|
|
free_page((unsigned long)(vcpu->arch.sie_block));
|
|
out_free_cpu:
|
|
kmem_cache_free(kvm_vcpu_cache, vcpu);
|
|
out:
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_s390_vcpu_has_irq(vcpu, 0);
|
|
}
|
|
|
|
bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
|
|
{
|
|
return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
|
|
}
|
|
|
|
void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
|
|
{
|
|
atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
|
|
exit_sie(vcpu);
|
|
}
|
|
|
|
void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
|
|
{
|
|
atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
|
|
}
|
|
|
|
static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
|
|
{
|
|
atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
|
|
exit_sie(vcpu);
|
|
}
|
|
|
|
static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
|
|
{
|
|
atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
|
|
}
|
|
|
|
/*
|
|
* Kick a guest cpu out of SIE and wait until SIE is not running.
|
|
* If the CPU is not running (e.g. waiting as idle) the function will
|
|
* return immediately. */
|
|
void exit_sie(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
|
|
while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
|
|
cpu_relax();
|
|
}
|
|
|
|
/* Kick a guest cpu out of SIE to process a request synchronously */
|
|
void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
|
|
{
|
|
kvm_make_request(req, vcpu);
|
|
kvm_s390_vcpu_request(vcpu);
|
|
}
|
|
|
|
static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
struct kvm *kvm = gmap->private;
|
|
struct kvm_vcpu *vcpu;
|
|
unsigned long prefix;
|
|
int i;
|
|
|
|
if (gmap_is_shadow(gmap))
|
|
return;
|
|
if (start >= 1UL << 31)
|
|
/* We are only interested in prefix pages */
|
|
return;
|
|
kvm_for_each_vcpu(i, vcpu, kvm) {
|
|
/* match against both prefix pages */
|
|
prefix = kvm_s390_get_prefix(vcpu);
|
|
if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
|
|
VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
|
|
start, end);
|
|
kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
|
|
}
|
|
}
|
|
}
|
|
|
|
int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
|
|
{
|
|
/* kvm common code refers to this, but never calls it */
|
|
BUG();
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
|
|
struct kvm_one_reg *reg)
|
|
{
|
|
int r = -EINVAL;
|
|
|
|
switch (reg->id) {
|
|
case KVM_REG_S390_TODPR:
|
|
r = put_user(vcpu->arch.sie_block->todpr,
|
|
(u32 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_EPOCHDIFF:
|
|
r = put_user(vcpu->arch.sie_block->epoch,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_CPU_TIMER:
|
|
r = put_user(kvm_s390_get_cpu_timer(vcpu),
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_CLOCK_COMP:
|
|
r = put_user(vcpu->arch.sie_block->ckc,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_PFTOKEN:
|
|
r = put_user(vcpu->arch.pfault_token,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_PFCOMPARE:
|
|
r = put_user(vcpu->arch.pfault_compare,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_PFSELECT:
|
|
r = put_user(vcpu->arch.pfault_select,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_PP:
|
|
r = put_user(vcpu->arch.sie_block->pp,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_GBEA:
|
|
r = put_user(vcpu->arch.sie_block->gbea,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
|
|
struct kvm_one_reg *reg)
|
|
{
|
|
int r = -EINVAL;
|
|
__u64 val;
|
|
|
|
switch (reg->id) {
|
|
case KVM_REG_S390_TODPR:
|
|
r = get_user(vcpu->arch.sie_block->todpr,
|
|
(u32 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_EPOCHDIFF:
|
|
r = get_user(vcpu->arch.sie_block->epoch,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_CPU_TIMER:
|
|
r = get_user(val, (u64 __user *)reg->addr);
|
|
if (!r)
|
|
kvm_s390_set_cpu_timer(vcpu, val);
|
|
break;
|
|
case KVM_REG_S390_CLOCK_COMP:
|
|
r = get_user(vcpu->arch.sie_block->ckc,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_PFTOKEN:
|
|
r = get_user(vcpu->arch.pfault_token,
|
|
(u64 __user *)reg->addr);
|
|
if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
|
|
kvm_clear_async_pf_completion_queue(vcpu);
|
|
break;
|
|
case KVM_REG_S390_PFCOMPARE:
|
|
r = get_user(vcpu->arch.pfault_compare,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_PFSELECT:
|
|
r = get_user(vcpu->arch.pfault_select,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_PP:
|
|
r = get_user(vcpu->arch.sie_block->pp,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
case KVM_REG_S390_GBEA:
|
|
r = get_user(vcpu->arch.sie_block->gbea,
|
|
(u64 __user *)reg->addr);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvm_s390_vcpu_initial_reset(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
|
{
|
|
vcpu_load(vcpu);
|
|
memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs));
|
|
vcpu_put(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
|
{
|
|
vcpu_load(vcpu);
|
|
memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
|
|
vcpu_put(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
|
|
struct kvm_sregs *sregs)
|
|
{
|
|
vcpu_load(vcpu);
|
|
|
|
memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
|
|
memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
|
|
|
|
vcpu_put(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
|
|
struct kvm_sregs *sregs)
|
|
{
|
|
vcpu_load(vcpu);
|
|
|
|
memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
|
|
memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
|
|
|
|
vcpu_put(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
|
{
|
|
int ret = 0;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
if (test_fp_ctl(fpu->fpc)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
vcpu->run->s.regs.fpc = fpu->fpc;
|
|
if (MACHINE_HAS_VX)
|
|
convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
|
|
(freg_t *) fpu->fprs);
|
|
else
|
|
memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
|
|
|
|
out:
|
|
vcpu_put(vcpu);
|
|
return ret;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
|
{
|
|
vcpu_load(vcpu);
|
|
|
|
/* make sure we have the latest values */
|
|
save_fpu_regs();
|
|
if (MACHINE_HAS_VX)
|
|
convert_vx_to_fp((freg_t *) fpu->fprs,
|
|
(__vector128 *) vcpu->run->s.regs.vrs);
|
|
else
|
|
memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
|
|
fpu->fpc = vcpu->run->s.regs.fpc;
|
|
|
|
vcpu_put(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (!is_vcpu_stopped(vcpu))
|
|
rc = -EBUSY;
|
|
else {
|
|
vcpu->run->psw_mask = psw.mask;
|
|
vcpu->run->psw_addr = psw.addr;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
|
|
struct kvm_translation *tr)
|
|
{
|
|
return -EINVAL; /* not implemented yet */
|
|
}
|
|
|
|
#define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
|
|
KVM_GUESTDBG_USE_HW_BP | \
|
|
KVM_GUESTDBG_ENABLE)
|
|
|
|
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
|
|
struct kvm_guest_debug *dbg)
|
|
{
|
|
int rc = 0;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
vcpu->guest_debug = 0;
|
|
kvm_s390_clear_bp_data(vcpu);
|
|
|
|
if (dbg->control & ~VALID_GUESTDBG_FLAGS) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (!sclp.has_gpere) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (dbg->control & KVM_GUESTDBG_ENABLE) {
|
|
vcpu->guest_debug = dbg->control;
|
|
/* enforce guest PER */
|
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_P);
|
|
|
|
if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
|
|
rc = kvm_s390_import_bp_data(vcpu, dbg);
|
|
} else {
|
|
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
|
|
vcpu->arch.guestdbg.last_bp = 0;
|
|
}
|
|
|
|
if (rc) {
|
|
vcpu->guest_debug = 0;
|
|
kvm_s390_clear_bp_data(vcpu);
|
|
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
|
|
}
|
|
|
|
out:
|
|
vcpu_put(vcpu);
|
|
return rc;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
|
|
struct kvm_mp_state *mp_state)
|
|
{
|
|
int ret;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
/* CHECK_STOP and LOAD are not supported yet */
|
|
ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
|
|
KVM_MP_STATE_OPERATING;
|
|
|
|
vcpu_put(vcpu);
|
|
return ret;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
|
|
struct kvm_mp_state *mp_state)
|
|
{
|
|
int rc = 0;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
/* user space knows about this interface - let it control the state */
|
|
vcpu->kvm->arch.user_cpu_state_ctrl = 1;
|
|
|
|
switch (mp_state->mp_state) {
|
|
case KVM_MP_STATE_STOPPED:
|
|
kvm_s390_vcpu_stop(vcpu);
|
|
break;
|
|
case KVM_MP_STATE_OPERATING:
|
|
kvm_s390_vcpu_start(vcpu);
|
|
break;
|
|
case KVM_MP_STATE_LOAD:
|
|
case KVM_MP_STATE_CHECK_STOP:
|
|
/* fall through - CHECK_STOP and LOAD are not supported yet */
|
|
default:
|
|
rc = -ENXIO;
|
|
}
|
|
|
|
vcpu_put(vcpu);
|
|
return rc;
|
|
}
|
|
|
|
static bool ibs_enabled(struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_s390_test_cpuflags(vcpu, CPUSTAT_IBS);
|
|
}
|
|
|
|
static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
|
|
{
|
|
retry:
|
|
kvm_s390_vcpu_request_handled(vcpu);
|
|
if (!kvm_request_pending(vcpu))
|
|
return 0;
|
|
/*
|
|
* We use MMU_RELOAD just to re-arm the ipte notifier for the
|
|
* guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
|
|
* This ensures that the ipte instruction for this request has
|
|
* already finished. We might race against a second unmapper that
|
|
* wants to set the blocking bit. Lets just retry the request loop.
|
|
*/
|
|
if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
|
|
int rc;
|
|
rc = gmap_mprotect_notify(vcpu->arch.gmap,
|
|
kvm_s390_get_prefix(vcpu),
|
|
PAGE_SIZE * 2, PROT_WRITE);
|
|
if (rc) {
|
|
kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
|
|
return rc;
|
|
}
|
|
goto retry;
|
|
}
|
|
|
|
if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
|
|
vcpu->arch.sie_block->ihcpu = 0xffff;
|
|
goto retry;
|
|
}
|
|
|
|
if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
|
|
if (!ibs_enabled(vcpu)) {
|
|
trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
|
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_IBS);
|
|
}
|
|
goto retry;
|
|
}
|
|
|
|
if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
|
|
if (ibs_enabled(vcpu)) {
|
|
trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
|
|
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IBS);
|
|
}
|
|
goto retry;
|
|
}
|
|
|
|
if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
|
|
vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
|
|
goto retry;
|
|
}
|
|
|
|
if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) {
|
|
/*
|
|
* Disable CMMA virtualization; we will emulate the ESSA
|
|
* instruction manually, in order to provide additional
|
|
* functionalities needed for live migration.
|
|
*/
|
|
vcpu->arch.sie_block->ecb2 &= ~ECB2_CMMA;
|
|
goto retry;
|
|
}
|
|
|
|
if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) {
|
|
/*
|
|
* Re-enable CMMA virtualization if CMMA is available and
|
|
* was used.
|
|
*/
|
|
if ((vcpu->kvm->arch.use_cmma) &&
|
|
(vcpu->kvm->mm->context.use_cmma))
|
|
vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
|
|
goto retry;
|
|
}
|
|
|
|
/* nothing to do, just clear the request */
|
|
kvm_clear_request(KVM_REQ_UNHALT, vcpu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void kvm_s390_set_tod_clock_ext(struct kvm *kvm,
|
|
const struct kvm_s390_vm_tod_clock *gtod)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
struct kvm_s390_tod_clock_ext htod;
|
|
int i;
|
|
|
|
mutex_lock(&kvm->lock);
|
|
preempt_disable();
|
|
|
|
get_tod_clock_ext((char *)&htod);
|
|
|
|
kvm->arch.epoch = gtod->tod - htod.tod;
|
|
kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
|
|
|
|
if (kvm->arch.epoch > gtod->tod)
|
|
kvm->arch.epdx -= 1;
|
|
|
|
kvm_s390_vcpu_block_all(kvm);
|
|
kvm_for_each_vcpu(i, vcpu, kvm) {
|
|
vcpu->arch.sie_block->epoch = kvm->arch.epoch;
|
|
vcpu->arch.sie_block->epdx = kvm->arch.epdx;
|
|
}
|
|
|
|
kvm_s390_vcpu_unblock_all(kvm);
|
|
preempt_enable();
|
|
mutex_unlock(&kvm->lock);
|
|
}
|
|
|
|
void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
int i;
|
|
|
|
mutex_lock(&kvm->lock);
|
|
preempt_disable();
|
|
kvm->arch.epoch = tod - get_tod_clock();
|
|
kvm_s390_vcpu_block_all(kvm);
|
|
kvm_for_each_vcpu(i, vcpu, kvm)
|
|
vcpu->arch.sie_block->epoch = kvm->arch.epoch;
|
|
kvm_s390_vcpu_unblock_all(kvm);
|
|
preempt_enable();
|
|
mutex_unlock(&kvm->lock);
|
|
}
|
|
|
|
/**
|
|
* kvm_arch_fault_in_page - fault-in guest page if necessary
|
|
* @vcpu: The corresponding virtual cpu
|
|
* @gpa: Guest physical address
|
|
* @writable: Whether the page should be writable or not
|
|
*
|
|
* Make sure that a guest page has been faulted-in on the host.
|
|
*
|
|
* Return: Zero on success, negative error code otherwise.
|
|
*/
|
|
long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
|
|
{
|
|
return gmap_fault(vcpu->arch.gmap, gpa,
|
|
writable ? FAULT_FLAG_WRITE : 0);
|
|
}
|
|
|
|
static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
|
|
unsigned long token)
|
|
{
|
|
struct kvm_s390_interrupt inti;
|
|
struct kvm_s390_irq irq;
|
|
|
|
if (start_token) {
|
|
irq.u.ext.ext_params2 = token;
|
|
irq.type = KVM_S390_INT_PFAULT_INIT;
|
|
WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
|
|
} else {
|
|
inti.type = KVM_S390_INT_PFAULT_DONE;
|
|
inti.parm64 = token;
|
|
WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
|
|
}
|
|
}
|
|
|
|
void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
|
|
struct kvm_async_pf *work)
|
|
{
|
|
trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
|
|
__kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
|
|
}
|
|
|
|
void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
|
|
struct kvm_async_pf *work)
|
|
{
|
|
trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
|
|
__kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
|
|
}
|
|
|
|
void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
|
|
struct kvm_async_pf *work)
|
|
{
|
|
/* s390 will always inject the page directly */
|
|
}
|
|
|
|
bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
|
|
{
|
|
/*
|
|
* s390 will always inject the page directly,
|
|
* but we still want check_async_completion to cleanup
|
|
*/
|
|
return true;
|
|
}
|
|
|
|
static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
|
|
{
|
|
hva_t hva;
|
|
struct kvm_arch_async_pf arch;
|
|
int rc;
|
|
|
|
if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
|
|
return 0;
|
|
if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
|
|
vcpu->arch.pfault_compare)
|
|
return 0;
|
|
if (psw_extint_disabled(vcpu))
|
|
return 0;
|
|
if (kvm_s390_vcpu_has_irq(vcpu, 0))
|
|
return 0;
|
|
if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
|
|
return 0;
|
|
if (!vcpu->arch.gmap->pfault_enabled)
|
|
return 0;
|
|
|
|
hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
|
|
hva += current->thread.gmap_addr & ~PAGE_MASK;
|
|
if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
|
|
return 0;
|
|
|
|
rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
|
|
return rc;
|
|
}
|
|
|
|
static int vcpu_pre_run(struct kvm_vcpu *vcpu)
|
|
{
|
|
int rc, cpuflags;
|
|
|
|
/*
|
|
* On s390 notifications for arriving pages will be delivered directly
|
|
* to the guest but the house keeping for completed pfaults is
|
|
* handled outside the worker.
|
|
*/
|
|
kvm_check_async_pf_completion(vcpu);
|
|
|
|
vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
|
|
vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
|
|
|
|
if (need_resched())
|
|
schedule();
|
|
|
|
if (test_cpu_flag(CIF_MCCK_PENDING))
|
|
s390_handle_mcck();
|
|
|
|
if (!kvm_is_ucontrol(vcpu->kvm)) {
|
|
rc = kvm_s390_deliver_pending_interrupts(vcpu);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
rc = kvm_s390_handle_requests(vcpu);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (guestdbg_enabled(vcpu)) {
|
|
kvm_s390_backup_guest_per_regs(vcpu);
|
|
kvm_s390_patch_guest_per_regs(vcpu);
|
|
}
|
|
|
|
vcpu->arch.sie_block->icptcode = 0;
|
|
cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
|
|
VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
|
|
trace_kvm_s390_sie_enter(vcpu, cpuflags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_pgm_info pgm_info = {
|
|
.code = PGM_ADDRESSING,
|
|
};
|
|
u8 opcode, ilen;
|
|
int rc;
|
|
|
|
VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
|
|
trace_kvm_s390_sie_fault(vcpu);
|
|
|
|
/*
|
|
* We want to inject an addressing exception, which is defined as a
|
|
* suppressing or terminating exception. However, since we came here
|
|
* by a DAT access exception, the PSW still points to the faulting
|
|
* instruction since DAT exceptions are nullifying. So we've got
|
|
* to look up the current opcode to get the length of the instruction
|
|
* to be able to forward the PSW.
|
|
*/
|
|
rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
|
|
ilen = insn_length(opcode);
|
|
if (rc < 0) {
|
|
return rc;
|
|
} else if (rc) {
|
|
/* Instruction-Fetching Exceptions - we can't detect the ilen.
|
|
* Forward by arbitrary ilc, injection will take care of
|
|
* nullification if necessary.
|
|
*/
|
|
pgm_info = vcpu->arch.pgm;
|
|
ilen = 4;
|
|
}
|
|
pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
|
|
kvm_s390_forward_psw(vcpu, ilen);
|
|
return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
|
|
}
|
|
|
|
static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
|
|
{
|
|
struct mcck_volatile_info *mcck_info;
|
|
struct sie_page *sie_page;
|
|
|
|
VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
|
|
vcpu->arch.sie_block->icptcode);
|
|
trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
|
|
|
|
if (guestdbg_enabled(vcpu))
|
|
kvm_s390_restore_guest_per_regs(vcpu);
|
|
|
|
vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
|
|
vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
|
|
|
|
if (exit_reason == -EINTR) {
|
|
VCPU_EVENT(vcpu, 3, "%s", "machine check");
|
|
sie_page = container_of(vcpu->arch.sie_block,
|
|
struct sie_page, sie_block);
|
|
mcck_info = &sie_page->mcck_info;
|
|
kvm_s390_reinject_machine_check(vcpu, mcck_info);
|
|
return 0;
|
|
}
|
|
|
|
if (vcpu->arch.sie_block->icptcode > 0) {
|
|
int rc = kvm_handle_sie_intercept(vcpu);
|
|
|
|
if (rc != -EOPNOTSUPP)
|
|
return rc;
|
|
vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
|
|
vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
|
|
vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
|
|
vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
|
|
return -EREMOTE;
|
|
} else if (exit_reason != -EFAULT) {
|
|
vcpu->stat.exit_null++;
|
|
return 0;
|
|
} else if (kvm_is_ucontrol(vcpu->kvm)) {
|
|
vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
|
|
vcpu->run->s390_ucontrol.trans_exc_code =
|
|
current->thread.gmap_addr;
|
|
vcpu->run->s390_ucontrol.pgm_code = 0x10;
|
|
return -EREMOTE;
|
|
} else if (current->thread.gmap_pfault) {
|
|
trace_kvm_s390_major_guest_pfault(vcpu);
|
|
current->thread.gmap_pfault = 0;
|
|
if (kvm_arch_setup_async_pf(vcpu))
|
|
return 0;
|
|
return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
|
|
}
|
|
return vcpu_post_run_fault_in_sie(vcpu);
|
|
}
|
|
|
|
static int __vcpu_run(struct kvm_vcpu *vcpu)
|
|
{
|
|
int rc, exit_reason;
|
|
|
|
/*
|
|
* We try to hold kvm->srcu during most of vcpu_run (except when run-
|
|
* ning the guest), so that memslots (and other stuff) are protected
|
|
*/
|
|
vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
|
|
|
|
do {
|
|
rc = vcpu_pre_run(vcpu);
|
|
if (rc)
|
|
break;
|
|
|
|
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
|
|
/*
|
|
* As PF_VCPU will be used in fault handler, between
|
|
* guest_enter and guest_exit should be no uaccess.
|
|
*/
|
|
local_irq_disable();
|
|
guest_enter_irqoff();
|
|
__disable_cpu_timer_accounting(vcpu);
|
|
local_irq_enable();
|
|
exit_reason = sie64a(vcpu->arch.sie_block,
|
|
vcpu->run->s.regs.gprs);
|
|
local_irq_disable();
|
|
__enable_cpu_timer_accounting(vcpu);
|
|
guest_exit_irqoff();
|
|
local_irq_enable();
|
|
vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
|
|
|
|
rc = vcpu_post_run(vcpu, exit_reason);
|
|
} while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
|
|
|
|
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
|
|
return rc;
|
|
}
|
|
|
|
static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
|
|
{
|
|
struct runtime_instr_cb *riccb;
|
|
struct gs_cb *gscb;
|
|
|
|
riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
|
|
gscb = (struct gs_cb *) &kvm_run->s.regs.gscb;
|
|
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_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
|
|
if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
|
|
memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
|
|
/* some control register changes require a tlb flush */
|
|
kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
|
|
}
|
|
if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
|
|
kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
|
|
vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
|
|
vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
|
|
vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
|
|
vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
|
|
}
|
|
if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
|
|
vcpu->arch.pfault_token = kvm_run->s.regs.pft;
|
|
vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
|
|
vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
|
|
if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
|
|
kvm_clear_async_pf_completion_queue(vcpu);
|
|
}
|
|
/*
|
|
* If userspace sets the riccb (e.g. after migration) to a valid state,
|
|
* we should enable RI here instead of doing the lazy enablement.
|
|
*/
|
|
if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
|
|
test_kvm_facility(vcpu->kvm, 64) &&
|
|
riccb->v &&
|
|
!(vcpu->arch.sie_block->ecb3 & ECB3_RI)) {
|
|
VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
|
|
vcpu->arch.sie_block->ecb3 |= ECB3_RI;
|
|
}
|
|
/*
|
|
* If userspace sets the gscb (e.g. after migration) to non-zero,
|
|
* we should enable GS here instead of doing the lazy enablement.
|
|
*/
|
|
if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) &&
|
|
test_kvm_facility(vcpu->kvm, 133) &&
|
|
gscb->gssm &&
|
|
!vcpu->arch.gs_enabled) {
|
|
VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)");
|
|
vcpu->arch.sie_block->ecb |= ECB_GS;
|
|
vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
|
|
vcpu->arch.gs_enabled = 1;
|
|
}
|
|
if ((kvm_run->kvm_dirty_regs & KVM_SYNC_BPBC) &&
|
|
test_kvm_facility(vcpu->kvm, 82)) {
|
|
vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
|
|
vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0;
|
|
}
|
|
save_access_regs(vcpu->arch.host_acrs);
|
|
restore_access_regs(vcpu->run->s.regs.acrs);
|
|
/* save host (userspace) fprs/vrs */
|
|
save_fpu_regs();
|
|
vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
|
|
vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
|
|
if (MACHINE_HAS_VX)
|
|
current->thread.fpu.regs = vcpu->run->s.regs.vrs;
|
|
else
|
|
current->thread.fpu.regs = vcpu->run->s.regs.fprs;
|
|
current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
|
|
if (test_fp_ctl(current->thread.fpu.fpc))
|
|
/* User space provided an invalid FPC, let's clear it */
|
|
current->thread.fpu.fpc = 0;
|
|
if (MACHINE_HAS_GS) {
|
|
preempt_disable();
|
|
__ctl_set_bit(2, 4);
|
|
if (current->thread.gs_cb) {
|
|
vcpu->arch.host_gscb = current->thread.gs_cb;
|
|
save_gs_cb(vcpu->arch.host_gscb);
|
|
}
|
|
if (vcpu->arch.gs_enabled) {
|
|
current->thread.gs_cb = (struct gs_cb *)
|
|
&vcpu->run->s.regs.gscb;
|
|
restore_gs_cb(current->thread.gs_cb);
|
|
}
|
|
preempt_enable();
|
|
}
|
|
|
|
kvm_run->kvm_dirty_regs = 0;
|
|
}
|
|
|
|
static void store_regs(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 = kvm_s390_get_prefix(vcpu);
|
|
memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
|
|
kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
|
|
kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
|
|
kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
|
|
kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
|
|
kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
|
|
kvm_run->s.regs.pft = vcpu->arch.pfault_token;
|
|
kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
|
|
kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
|
|
kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC;
|
|
save_access_regs(vcpu->run->s.regs.acrs);
|
|
restore_access_regs(vcpu->arch.host_acrs);
|
|
/* Save guest register state */
|
|
save_fpu_regs();
|
|
vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
|
|
/* Restore will be done lazily at return */
|
|
current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
|
|
current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
|
|
if (MACHINE_HAS_GS) {
|
|
__ctl_set_bit(2, 4);
|
|
if (vcpu->arch.gs_enabled)
|
|
save_gs_cb(current->thread.gs_cb);
|
|
preempt_disable();
|
|
current->thread.gs_cb = vcpu->arch.host_gscb;
|
|
restore_gs_cb(vcpu->arch.host_gscb);
|
|
preempt_enable();
|
|
if (!vcpu->arch.host_gscb)
|
|
__ctl_clear_bit(2, 4);
|
|
vcpu->arch.host_gscb = NULL;
|
|
}
|
|
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
|
|
{
|
|
int rc;
|
|
|
|
if (kvm_run->immediate_exit)
|
|
return -EINTR;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
if (guestdbg_exit_pending(vcpu)) {
|
|
kvm_s390_prepare_debug_exit(vcpu);
|
|
rc = 0;
|
|
goto out;
|
|
}
|
|
|
|
kvm_sigset_activate(vcpu);
|
|
|
|
if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
|
|
kvm_s390_vcpu_start(vcpu);
|
|
} else if (is_vcpu_stopped(vcpu)) {
|
|
pr_err_ratelimited("can't run stopped vcpu %d\n",
|
|
vcpu->vcpu_id);
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
sync_regs(vcpu, kvm_run);
|
|
enable_cpu_timer_accounting(vcpu);
|
|
|
|
might_fault();
|
|
rc = __vcpu_run(vcpu);
|
|
|
|
if (signal_pending(current) && !rc) {
|
|
kvm_run->exit_reason = KVM_EXIT_INTR;
|
|
rc = -EINTR;
|
|
}
|
|
|
|
if (guestdbg_exit_pending(vcpu) && !rc) {
|
|
kvm_s390_prepare_debug_exit(vcpu);
|
|
rc = 0;
|
|
}
|
|
|
|
if (rc == -EREMOTE) {
|
|
/* userspace support is needed, kvm_run has been prepared */
|
|
rc = 0;
|
|
}
|
|
|
|
disable_cpu_timer_accounting(vcpu);
|
|
store_regs(vcpu, kvm_run);
|
|
|
|
kvm_sigset_deactivate(vcpu);
|
|
|
|
vcpu->stat.exit_userspace++;
|
|
out:
|
|
vcpu_put(vcpu);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* store status at address
|
|
* we use have two special cases:
|
|
* KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
|
|
* KVM_S390_STORE_STATUS_PREFIXED: -> prefix
|
|
*/
|
|
int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
|
|
{
|
|
unsigned char archmode = 1;
|
|
freg_t fprs[NUM_FPRS];
|
|
unsigned int px;
|
|
u64 clkcomp, cputm;
|
|
int rc;
|
|
|
|
px = kvm_s390_get_prefix(vcpu);
|
|
if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
|
|
if (write_guest_abs(vcpu, 163, &archmode, 1))
|
|
return -EFAULT;
|
|
gpa = 0;
|
|
} else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
|
|
if (write_guest_real(vcpu, 163, &archmode, 1))
|
|
return -EFAULT;
|
|
gpa = px;
|
|
} else
|
|
gpa -= __LC_FPREGS_SAVE_AREA;
|
|
|
|
/* manually convert vector registers if necessary */
|
|
if (MACHINE_HAS_VX) {
|
|
convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
|
|
rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
|
|
fprs, 128);
|
|
} else {
|
|
rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
|
|
vcpu->run->s.regs.fprs, 128);
|
|
}
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
|
|
vcpu->run->s.regs.gprs, 128);
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
|
|
&vcpu->arch.sie_block->gpsw, 16);
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
|
|
&px, 4);
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
|
|
&vcpu->run->s.regs.fpc, 4);
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
|
|
&vcpu->arch.sie_block->todpr, 4);
|
|
cputm = kvm_s390_get_cpu_timer(vcpu);
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
|
|
&cputm, 8);
|
|
clkcomp = vcpu->arch.sie_block->ckc >> 8;
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
|
|
&clkcomp, 8);
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
|
|
&vcpu->run->s.regs.acrs, 64);
|
|
rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
|
|
&vcpu->arch.sie_block->gcr, 128);
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
|
|
{
|
|
/*
|
|
* The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
|
|
* switch in the run ioctl. Let's update our copies before we save
|
|
* it into the save area
|
|
*/
|
|
save_fpu_regs();
|
|
vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
|
|
save_access_regs(vcpu->run->s.regs.acrs);
|
|
|
|
return kvm_s390_store_status_unloaded(vcpu, addr);
|
|
}
|
|
|
|
static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
|
|
kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
|
|
}
|
|
|
|
static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
|
|
{
|
|
unsigned int i;
|
|
struct kvm_vcpu *vcpu;
|
|
|
|
kvm_for_each_vcpu(i, vcpu, kvm) {
|
|
__disable_ibs_on_vcpu(vcpu);
|
|
}
|
|
}
|
|
|
|
static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (!sclp.has_ibs)
|
|
return;
|
|
kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
|
|
kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
|
|
}
|
|
|
|
void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
|
|
{
|
|
int i, online_vcpus, started_vcpus = 0;
|
|
|
|
if (!is_vcpu_stopped(vcpu))
|
|
return;
|
|
|
|
trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
|
|
/* Only one cpu at a time may enter/leave the STOPPED state. */
|
|
spin_lock(&vcpu->kvm->arch.start_stop_lock);
|
|
online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
|
|
|
|
for (i = 0; i < online_vcpus; i++) {
|
|
if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
|
|
started_vcpus++;
|
|
}
|
|
|
|
if (started_vcpus == 0) {
|
|
/* we're the only active VCPU -> speed it up */
|
|
__enable_ibs_on_vcpu(vcpu);
|
|
} else if (started_vcpus == 1) {
|
|
/*
|
|
* As we are starting a second VCPU, we have to disable
|
|
* the IBS facility on all VCPUs to remove potentially
|
|
* oustanding ENABLE requests.
|
|
*/
|
|
__disable_ibs_on_all_vcpus(vcpu->kvm);
|
|
}
|
|
|
|
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_STOPPED);
|
|
/*
|
|
* Another VCPU might have used IBS while we were offline.
|
|
* Let's play safe and flush the VCPU at startup.
|
|
*/
|
|
kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
|
|
spin_unlock(&vcpu->kvm->arch.start_stop_lock);
|
|
return;
|
|
}
|
|
|
|
void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
|
|
{
|
|
int i, online_vcpus, started_vcpus = 0;
|
|
struct kvm_vcpu *started_vcpu = NULL;
|
|
|
|
if (is_vcpu_stopped(vcpu))
|
|
return;
|
|
|
|
trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
|
|
/* Only one cpu at a time may enter/leave the STOPPED state. */
|
|
spin_lock(&vcpu->kvm->arch.start_stop_lock);
|
|
online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
|
|
|
|
/* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
|
|
kvm_s390_clear_stop_irq(vcpu);
|
|
|
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOPPED);
|
|
__disable_ibs_on_vcpu(vcpu);
|
|
|
|
for (i = 0; i < online_vcpus; i++) {
|
|
if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
|
|
started_vcpus++;
|
|
started_vcpu = vcpu->kvm->vcpus[i];
|
|
}
|
|
}
|
|
|
|
if (started_vcpus == 1) {
|
|
/*
|
|
* As we only have one VCPU left, we want to enable the
|
|
* IBS facility for that VCPU to speed it up.
|
|
*/
|
|
__enable_ibs_on_vcpu(started_vcpu);
|
|
}
|
|
|
|
spin_unlock(&vcpu->kvm->arch.start_stop_lock);
|
|
return;
|
|
}
|
|
|
|
static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
|
|
struct kvm_enable_cap *cap)
|
|
{
|
|
int r;
|
|
|
|
if (cap->flags)
|
|
return -EINVAL;
|
|
|
|
switch (cap->cap) {
|
|
case KVM_CAP_S390_CSS_SUPPORT:
|
|
if (!vcpu->kvm->arch.css_support) {
|
|
vcpu->kvm->arch.css_support = 1;
|
|
VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
|
|
trace_kvm_s390_enable_css(vcpu->kvm);
|
|
}
|
|
r = 0;
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_mem_op *mop)
|
|
{
|
|
void __user *uaddr = (void __user *)mop->buf;
|
|
void *tmpbuf = NULL;
|
|
int r, srcu_idx;
|
|
const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
|
|
| KVM_S390_MEMOP_F_CHECK_ONLY;
|
|
|
|
if (mop->flags & ~supported_flags)
|
|
return -EINVAL;
|
|
|
|
if (mop->size > MEM_OP_MAX_SIZE)
|
|
return -E2BIG;
|
|
|
|
if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
|
|
tmpbuf = vmalloc(mop->size);
|
|
if (!tmpbuf)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
|
|
|
|
switch (mop->op) {
|
|
case KVM_S390_MEMOP_LOGICAL_READ:
|
|
if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
|
|
r = check_gva_range(vcpu, mop->gaddr, mop->ar,
|
|
mop->size, GACC_FETCH);
|
|
break;
|
|
}
|
|
r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
|
|
if (r == 0) {
|
|
if (copy_to_user(uaddr, tmpbuf, mop->size))
|
|
r = -EFAULT;
|
|
}
|
|
break;
|
|
case KVM_S390_MEMOP_LOGICAL_WRITE:
|
|
if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
|
|
r = check_gva_range(vcpu, mop->gaddr, mop->ar,
|
|
mop->size, GACC_STORE);
|
|
break;
|
|
}
|
|
if (copy_from_user(tmpbuf, uaddr, mop->size)) {
|
|
r = -EFAULT;
|
|
break;
|
|
}
|
|
r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
}
|
|
|
|
srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
|
|
|
|
if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
|
|
kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
|
|
|
|
vfree(tmpbuf);
|
|
return r;
|
|
}
|
|
|
|
long kvm_arch_vcpu_async_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
struct kvm_vcpu *vcpu = filp->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (ioctl) {
|
|
case KVM_S390_IRQ: {
|
|
struct kvm_s390_irq s390irq;
|
|
|
|
if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
|
|
return -EFAULT;
|
|
return kvm_s390_inject_vcpu(vcpu, &s390irq);
|
|
}
|
|
case KVM_S390_INTERRUPT: {
|
|
struct kvm_s390_interrupt s390int;
|
|
struct kvm_s390_irq s390irq;
|
|
|
|
if (copy_from_user(&s390int, argp, sizeof(s390int)))
|
|
return -EFAULT;
|
|
if (s390int_to_s390irq(&s390int, &s390irq))
|
|
return -EINVAL;
|
|
return kvm_s390_inject_vcpu(vcpu, &s390irq);
|
|
}
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
long kvm_arch_vcpu_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
struct kvm_vcpu *vcpu = filp->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
int idx;
|
|
long r;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
switch (ioctl) {
|
|
case KVM_S390_STORE_STATUS:
|
|
idx = srcu_read_lock(&vcpu->kvm->srcu);
|
|
r = kvm_s390_vcpu_store_status(vcpu, arg);
|
|
srcu_read_unlock(&vcpu->kvm->srcu, idx);
|
|
break;
|
|
case KVM_S390_SET_INITIAL_PSW: {
|
|
psw_t psw;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&psw, argp, sizeof(psw)))
|
|
break;
|
|
r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
|
|
break;
|
|
}
|
|
case KVM_S390_INITIAL_RESET:
|
|
r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
|
|
break;
|
|
case KVM_SET_ONE_REG:
|
|
case KVM_GET_ONE_REG: {
|
|
struct kvm_one_reg reg;
|
|
r = -EFAULT;
|
|
if (copy_from_user(®, argp, sizeof(reg)))
|
|
break;
|
|
if (ioctl == KVM_SET_ONE_REG)
|
|
r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®);
|
|
else
|
|
r = kvm_arch_vcpu_ioctl_get_one_reg(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(vcpu->arch.gmap, arg, 0);
|
|
break;
|
|
}
|
|
case KVM_ENABLE_CAP:
|
|
{
|
|
struct kvm_enable_cap cap;
|
|
r = -EFAULT;
|
|
if (copy_from_user(&cap, argp, sizeof(cap)))
|
|
break;
|
|
r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
|
|
break;
|
|
}
|
|
case KVM_S390_MEM_OP: {
|
|
struct kvm_s390_mem_op mem_op;
|
|
|
|
if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
|
|
r = kvm_s390_guest_mem_op(vcpu, &mem_op);
|
|
else
|
|
r = -EFAULT;
|
|
break;
|
|
}
|
|
case KVM_S390_SET_IRQ_STATE: {
|
|
struct kvm_s390_irq_state irq_state;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
|
|
break;
|
|
if (irq_state.len > VCPU_IRQS_MAX_BUF ||
|
|
irq_state.len == 0 ||
|
|
irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
/* do not use irq_state.flags, it will break old QEMUs */
|
|
r = kvm_s390_set_irq_state(vcpu,
|
|
(void __user *) irq_state.buf,
|
|
irq_state.len);
|
|
break;
|
|
}
|
|
case KVM_S390_GET_IRQ_STATE: {
|
|
struct kvm_s390_irq_state irq_state;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
|
|
break;
|
|
if (irq_state.len == 0) {
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
/* do not use irq_state.flags, it will break old QEMUs */
|
|
r = kvm_s390_get_irq_state(vcpu,
|
|
(__u8 __user *) irq_state.buf,
|
|
irq_state.len);
|
|
break;
|
|
}
|
|
default:
|
|
r = -ENOTTY;
|
|
}
|
|
|
|
vcpu_put(vcpu);
|
|
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;
|
|
}
|
|
|
|
int kvm_arch_create_memslot(struct kvm *kvm, 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,
|
|
const struct kvm_userspace_memory_region *mem,
|
|
enum kvm_mr_change change)
|
|
{
|
|
/* A few sanity checks. We can have memory slots which have to be
|
|
located/ended at a segment boundary (1MB). The memory in userland is
|
|
ok to be fragmented into various different vmas. It is okay to mmap()
|
|
and munmap() stuff in this slot after doing this call at any time */
|
|
|
|
if (mem->userspace_addr & 0xffffful)
|
|
return -EINVAL;
|
|
|
|
if (mem->memory_size & 0xffffful)
|
|
return -EINVAL;
|
|
|
|
if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_commit_memory_region(struct kvm *kvm,
|
|
const struct kvm_userspace_memory_region *mem,
|
|
const struct kvm_memory_slot *old,
|
|
const struct kvm_memory_slot *new,
|
|
enum kvm_mr_change change)
|
|
{
|
|
int rc;
|
|
|
|
/* If the basics of the memslot do not change, we do not want
|
|
* to update the gmap. Every update causes several unnecessary
|
|
* segment translation exceptions. This is usually handled just
|
|
* fine by the normal fault handler + gmap, but it will also
|
|
* cause faults on the prefix page of running guest CPUs.
|
|
*/
|
|
if (old->userspace_addr == mem->userspace_addr &&
|
|
old->base_gfn * PAGE_SIZE == mem->guest_phys_addr &&
|
|
old->npages * PAGE_SIZE == mem->memory_size)
|
|
return;
|
|
|
|
rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
|
|
mem->guest_phys_addr, mem->memory_size);
|
|
if (rc)
|
|
pr_warn("failed to commit memory region\n");
|
|
return;
|
|
}
|
|
|
|
static inline unsigned long nonhyp_mask(int i)
|
|
{
|
|
unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
|
|
|
|
return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
|
|
}
|
|
|
|
void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
|
|
{
|
|
vcpu->valid_wakeup = false;
|
|
}
|
|
|
|
static int __init kvm_s390_init(void)
|
|
{
|
|
int i;
|
|
|
|
if (!sclp.has_sief2) {
|
|
pr_info("SIE not available\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (i = 0; i < 16; i++)
|
|
kvm_s390_fac_list_mask[i] |=
|
|
S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
|
|
|
|
return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
|
|
}
|
|
|
|
static void __exit kvm_s390_exit(void)
|
|
{
|
|
kvm_exit();
|
|
}
|
|
|
|
module_init(kvm_s390_init);
|
|
module_exit(kvm_s390_exit);
|
|
|
|
/*
|
|
* Enable autoloading of the kvm module.
|
|
* Note that we add the module alias here instead of virt/kvm/kvm_main.c
|
|
* since x86 takes a different approach.
|
|
*/
|
|
#include <linux/miscdevice.h>
|
|
MODULE_ALIAS_MISCDEV(KVM_MINOR);
|
|
MODULE_ALIAS("devname:kvm");
|