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Merge branch 'topic/ppc-kvm' into next 

Merge in some commits we're sharing with the kvm-ppc tree.
This commit is contained in:
Michael Ellerman 2018-06-03 20:23:54 +10:00
parent 667416f385 eacbb218fb
commit 481c63acba
10 changed files with 260 additions and 12 deletions
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3
arch/powerpc/include/asm/asm-prototypes.h
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@ -134,4 +134,7 @@ unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip);
void pnv_power9_force_smt4_catch(void);
void pnv_power9_force_smt4_release(void);
void tm_enable(void);
void tm_disable(void);
void tm_abort(uint8_t cause);
#endif /* _ASM_POWERPC_ASM_PROTOTYPES_H */

7
arch/powerpc/include/asm/book3s/64/tlbflush-radix.h
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@ -51,4 +51,11 @@ extern void radix__flush_tlb_all(void);
extern void radix__flush_tlb_pte_p9_dd1(unsigned long old_pte, struct mm_struct *mm,
unsigned long address);
extern void radix__flush_tlb_lpid_page(unsigned int lpid,
unsigned long addr,
unsigned long page_size);
extern void radix__flush_pwc_lpid(unsigned int lpid);
extern void radix__local_flush_tlb_lpid(unsigned int lpid);
extern void radix__local_flush_tlb_lpid_guest(unsigned int lpid);
#endif

32
arch/powerpc/include/asm/reg.h
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@ -146,6 +146,12 @@
#define MSR_64BIT 0
#endif
/* Condition Register related */
#define CR0_SHIFT 28
#define CR0_MASK 0xF
#define CR0_TBEGIN_FAILURE (0x2 << 28) /* 0b0010 */
/* Power Management - Processor Stop Status and Control Register Fields */
#define PSSCR_RL_MASK 0x0000000F /* Requested Level */
#define PSSCR_MTL_MASK 0x000000F0 /* Maximum Transition Level */
@ -239,13 +245,27 @@
#define SPRN_TFIAR 0x81 /* Transaction Failure Inst Addr */
#define SPRN_TEXASR 0x82 /* Transaction EXception & Summary */
#define SPRN_TEXASRU 0x83 /* '' '' '' Upper 32 */
#define TEXASR_ABORT __MASK(63-31) /* terminated by tabort or treclaim */
#define TEXASR_SUSP __MASK(63-32) /* tx failed in suspended state */
#define TEXASR_HV __MASK(63-34) /* MSR[HV] when failure occurred */
#define TEXASR_PR __MASK(63-35) /* MSR[PR] when failure occurred */
#define TEXASR_FS __MASK(63-36) /* TEXASR Failure Summary */
#define TEXASR_EXACT __MASK(63-37) /* TFIAR value is exact */
#define TEXASR_FC_LG (63 - 7) /* Failure Code */
#define TEXASR_AB_LG (63 - 31) /* Abort */
#define TEXASR_SU_LG (63 - 32) /* Suspend */
#define TEXASR_HV_LG (63 - 34) /* Hypervisor state*/
#define TEXASR_PR_LG (63 - 35) /* Privilege level */
#define TEXASR_FS_LG (63 - 36) /* failure summary */
#define TEXASR_EX_LG (63 - 37) /* TFIAR exact bit */
#define TEXASR_ROT_LG (63 - 38) /* ROT bit */
#define TEXASR_ABORT __MASK(TEXASR_AB_LG) /* terminated by tabort or treclaim */
#define TEXASR_SUSP __MASK(TEXASR_SU_LG) /* tx failed in suspended state */
#define TEXASR_HV __MASK(TEXASR_HV_LG) /* MSR[HV] when failure occurred */
#define TEXASR_PR __MASK(TEXASR_PR_LG) /* MSR[PR] when failure occurred */
#define TEXASR_FS __MASK(TEXASR_FS_LG) /* TEXASR Failure Summary */
#define TEXASR_EXACT __MASK(TEXASR_EX_LG) /* TFIAR value is exact */
#define TEXASR_ROT __MASK(TEXASR_ROT_LG)
#define TEXASR_FC (ASM_CONST(0xFF) << TEXASR_FC_LG)
#define SPRN_TFHAR 0x80 /* Transaction Failure Handler Addr */
#define SPRN_TIDR 144 /* Thread ID register */
#define SPRN_CTRLF 0x088
#define SPRN_CTRLT 0x098

2
arch/powerpc/include/asm/tm.h
View File

@ -10,12 +10,10 @@
#ifndef __ASSEMBLY__
extern void tm_enable(void);
extern void tm_reclaim(struct thread_struct *thread,
uint8_t cause);
extern void tm_reclaim_current(uint8_t cause);
extern void tm_recheckpoint(struct thread_struct *thread);
extern void tm_abort(uint8_t cause);
extern void tm_save_sprs(struct thread_struct *thread);
extern void tm_restore_sprs(struct thread_struct *thread);

4
arch/powerpc/kernel/kvm.c
View File

@ -25,6 +25,7 @@
#include <linux/kvm_para.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/pagemap.h>
#include <asm/reg.h>
#include <asm/sections.h>
@ -672,14 +673,13 @@ static void kvm_use_magic_page(void)
{
u32 *p;
u32 *start, *end;
u32 tmp;
u32 features;
/* Tell the host to map the magic page to -4096 on all CPUs */
on_each_cpu(kvm_map_magic_page, &features, 1);
/* Quick self-test to see if the mapping works */
if (__get_user(tmp, (u32*)KVM_MAGIC_PAGE)) {
if (!fault_in_pages_readable((const char *)KVM_MAGIC_PAGE, sizeof(u32))) {
kvm_patching_worked = false;
return;
}

1
arch/powerpc/kernel/process.c
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@ -154,6 +154,7 @@ unsigned long msr_check_and_set(unsigned long bits)
return newmsr;
}
EXPORT_SYMBOL_GPL(msr_check_and_set);
void __msr_check_and_clear(unsigned long bits)
{

12
arch/powerpc/kernel/tm.S
View File

@ -12,6 +12,7 @@
#include <asm/ptrace.h>
#include <asm/reg.h>
#include <asm/bug.h>
#include <asm/export.h>
#ifdef CONFIG_VSX
/* See fpu.S, this is borrowed from there */
@ -55,6 +56,16 @@ _GLOBAL(tm_enable)
or r4, r4, r3
mtmsrd r4
1: blr
EXPORT_SYMBOL_GPL(tm_enable);
_GLOBAL(tm_disable)
mfmsr r4
li r3, MSR_TM >> 32
sldi r3, r3, 32
andc r4, r4, r3
mtmsrd r4
blr
EXPORT_SYMBOL_GPL(tm_disable);
_GLOBAL(tm_save_sprs)
mfspr r0, SPRN_TFHAR
@ -78,6 +89,7 @@ _GLOBAL(tm_restore_sprs)
_GLOBAL(tm_abort)
TABORT(R3)
blr
EXPORT_SYMBOL_GPL(tm_abort);
/* void tm_reclaim(struct thread_struct *thread,
* uint8_t cause)

1
arch/powerpc/mm/hash_utils_64.c
View File

@ -64,6 +64,7 @@
#include <asm/trace.h>
#include <asm/ps3.h>
#include <asm/pte-walk.h>
#include <asm/asm-prototypes.h>
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)

207
arch/powerpc/mm/tlb-radix.c
View File

@ -118,6 +118,53 @@ static inline void __tlbie_pid(unsigned long pid, unsigned long ric)
trace_tlbie(0, 0, rb, rs, ric, prs, r);
}
static inline void __tlbiel_lpid(unsigned long lpid, int set,
unsigned long ric)
{
unsigned long rb,rs,prs,r;
rb = PPC_BIT(52); /* IS = 2 */
rb |= set << PPC_BITLSHIFT(51);
rs = 0; /* LPID comes from LPIDR */
prs = 0; /* partition scoped */
r = 1; /* radix format */
asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
: : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
trace_tlbie(lpid, 1, rb, rs, ric, prs, r);
}
static inline void __tlbie_lpid(unsigned long lpid, unsigned long ric)
{
unsigned long rb,rs,prs,r;
rb = PPC_BIT(52); /* IS = 2 */
rs = lpid;
prs = 0; /* partition scoped */
r = 1; /* radix format */
asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1)
: : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
trace_tlbie(lpid, 0, rb, rs, ric, prs, r);
}
static inline void __tlbiel_lpid_guest(unsigned long lpid, int set,
unsigned long ric)
{
unsigned long rb,rs,prs,r;
rb = PPC_BIT(52); /* IS = 2 */
rb |= set << PPC_BITLSHIFT(51);
rs = 0; /* LPID comes from LPIDR */
prs = 1; /* process scoped */
r = 1; /* radix format */
asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
: : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
trace_tlbie(lpid, 1, rb, rs, ric, prs, r);
}
static inline void __tlbiel_va(unsigned long va, unsigned long pid,
unsigned long ap, unsigned long ric)
{
@ -150,6 +197,22 @@ static inline void __tlbie_va(unsigned long va, unsigned long pid,
trace_tlbie(0, 0, rb, rs, ric, prs, r);
}
static inline void __tlbie_lpid_va(unsigned long va, unsigned long lpid,
unsigned long ap, unsigned long ric)
{
unsigned long rb,rs,prs,r;
rb = va & ~(PPC_BITMASK(52, 63));
rb |= ap << PPC_BITLSHIFT(58);
rs = lpid;
prs = 0; /* partition scoped */
r = 1; /* radix format */
asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1)
: : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
trace_tlbie(lpid, 0, rb, rs, ric, prs, r);
}
static inline void fixup_tlbie(void)
{
unsigned long pid = 0;
@ -161,6 +224,16 @@ static inline void fixup_tlbie(void)
}
}
static inline void fixup_tlbie_lpid(unsigned long lpid)
{
unsigned long va = ((1UL << 52) - 1);
if (cpu_has_feature(CPU_FTR_P9_TLBIE_BUG)) {
asm volatile("ptesync": : :"memory");
__tlbie_lpid_va(va, lpid, mmu_get_ap(MMU_PAGE_64K), RIC_FLUSH_TLB);
}
}
/*
* We use 128 set in radix mode and 256 set in hpt mode.
*/
@ -214,6 +287,86 @@ static inline void _tlbie_pid(unsigned long pid, unsigned long ric)
asm volatile("eieio; tlbsync; ptesync": : :"memory");
}
static inline void _tlbiel_lpid(unsigned long lpid, unsigned long ric)
{
int set;
VM_BUG_ON(mfspr(SPRN_LPID) != lpid);
asm volatile("ptesync": : :"memory");
/*
* Flush the first set of the TLB, and if we're doing a RIC_FLUSH_ALL,
* also flush the entire Page Walk Cache.
*/
__tlbiel_lpid(lpid, 0, ric);
/* For PWC, only one flush is needed */
if (ric == RIC_FLUSH_PWC) {
asm volatile("ptesync": : :"memory");
return;
}
/* For the remaining sets, just flush the TLB */
for (set = 1; set < POWER9_TLB_SETS_RADIX ; set++)
__tlbiel_lpid(lpid, set, RIC_FLUSH_TLB);
asm volatile("ptesync": : :"memory");
asm volatile(PPC_INVALIDATE_ERAT "; isync" : : :"memory");
}
static inline void _tlbie_lpid(unsigned long lpid, unsigned long ric)
{
asm volatile("ptesync": : :"memory");
/*
* Workaround the fact that the "ric" argument to __tlbie_pid
* must be a compile-time contraint to match the "i" constraint
* in the asm statement.
*/
switch (ric) {
case RIC_FLUSH_TLB:
__tlbie_lpid(lpid, RIC_FLUSH_TLB);
break;
case RIC_FLUSH_PWC:
__tlbie_lpid(lpid, RIC_FLUSH_PWC);
break;
case RIC_FLUSH_ALL:
default:
__tlbie_lpid(lpid, RIC_FLUSH_ALL);
}
fixup_tlbie_lpid(lpid);
asm volatile("eieio; tlbsync; ptesync": : :"memory");
}
static inline void _tlbiel_lpid_guest(unsigned long lpid, unsigned long ric)
{
int set;
VM_BUG_ON(mfspr(SPRN_LPID) != lpid);
asm volatile("ptesync": : :"memory");
/*
* Flush the first set of the TLB, and if we're doing a RIC_FLUSH_ALL,
* also flush the entire Page Walk Cache.
*/
__tlbiel_lpid_guest(lpid, 0, ric);
/* For PWC, only one flush is needed */
if (ric == RIC_FLUSH_PWC) {
asm volatile("ptesync": : :"memory");
return;
}
/* For the remaining sets, just flush the TLB */
for (set = 1; set < POWER9_TLB_SETS_RADIX ; set++)
__tlbiel_lpid_guest(lpid, set, RIC_FLUSH_TLB);
asm volatile("ptesync": : :"memory");
}
static inline void __tlbiel_va_range(unsigned long start, unsigned long end,
unsigned long pid, unsigned long page_size,
unsigned long psize)
@ -268,6 +421,17 @@ static inline void _tlbie_va(unsigned long va, unsigned long pid,
asm volatile("eieio; tlbsync; ptesync": : :"memory");
}
static inline void _tlbie_lpid_va(unsigned long va, unsigned long lpid,
unsigned long psize, unsigned long ric)
{
unsigned long ap = mmu_get_ap(psize);
asm volatile("ptesync": : :"memory");
__tlbie_lpid_va(va, lpid, ap, ric);
fixup_tlbie_lpid(lpid);
asm volatile("eieio; tlbsync; ptesync": : :"memory");
}
static inline void _tlbie_va_range(unsigned long start, unsigned long end,
unsigned long pid, unsigned long page_size,
unsigned long psize, bool also_pwc)
@ -534,6 +698,49 @@ static int radix_get_mmu_psize(int page_size)
return psize;
}
/*
* Flush partition scoped LPID address translation for all CPUs.
*/
void radix__flush_tlb_lpid_page(unsigned int lpid,
unsigned long addr,
unsigned long page_size)
{
int psize = radix_get_mmu_psize(page_size);
_tlbie_lpid_va(addr, lpid, psize, RIC_FLUSH_TLB);
}
EXPORT_SYMBOL_GPL(radix__flush_tlb_lpid_page);
/*
* Flush partition scoped PWC from LPID for all CPUs.
*/
void radix__flush_pwc_lpid(unsigned int lpid)
{
_tlbie_lpid(lpid, RIC_FLUSH_PWC);
}
EXPORT_SYMBOL_GPL(radix__flush_pwc_lpid);
/*
* Flush partition scoped translations from LPID (=LPIDR)
*/
void radix__local_flush_tlb_lpid(unsigned int lpid)
{
_tlbiel_lpid(lpid, RIC_FLUSH_ALL);
}
EXPORT_SYMBOL_GPL(radix__local_flush_tlb_lpid);
/*
* Flush process scoped translations from LPID (=LPIDR).
* Important difference, the guest normally manages its own translations,
* but some cases e.g., vCPU CPU migration require KVM to flush.
*/
void radix__local_flush_tlb_lpid_guest(unsigned int lpid)
{
_tlbiel_lpid_guest(lpid, RIC_FLUSH_ALL);
}
EXPORT_SYMBOL_GPL(radix__local_flush_tlb_lpid_guest);
static void radix__flush_tlb_pwc_range_psize(struct mm_struct *mm, unsigned long start,
unsigned long end, int psize);

3
arch/powerpc/platforms/powernv/copy-paste.h
View File

@ -7,9 +7,8 @@
* 2 of the License, or (at your option) any later version.
*/
#include <asm/ppc-opcode.h>
#include <asm/reg.h>
#define CR0_SHIFT 28
#define CR0_MASK 0xF
/*
* Copy/paste instructions:
*