Currently PR-style KVM keeps the volatile guest register values
(R0 - R13, CR, LR, CTR, XER, PC) in a shadow_vcpu struct rather than
the main kvm_vcpu struct. For 64-bit, the shadow_vcpu exists in two
places, a kmalloc'd struct and in the PACA, and it gets copied back
and forth in kvmppc_core_vcpu_load/put(), because the real-mode code
can't rely on being able to access the kmalloc'd struct.
This changes the code to copy the volatile values into the shadow_vcpu
as one of the last things done before entering the guest. Similarly
the values are copied back out of the shadow_vcpu to the kvm_vcpu
immediately after exiting the guest. We arrange for interrupts to be
still disabled at this point so that we can't get preempted on 64-bit
and end up copying values from the wrong PACA.
This means that the accessor functions in kvm_book3s.h for these
registers are greatly simplified, and are same between PR and HV KVM.
In places where accesses to shadow_vcpu fields are now replaced by
accesses to the kvm_vcpu, we can also remove the svcpu_get/put pairs.
Finally, on 64-bit, we don't need the kmalloc'd struct at all any more.
With this, the time to read the PVR one million times in a loop went
from 478.2ms to 480.1ms (averages of 4 values), a difference which is
not statistically significant given the variability of the results.
Signed-off-by: Paul Mackerras <pau...@samba.org>
---
v2: Doesn't break compilation of non-book3s targets.
arch/powerpc/include/asm/kvm_book3s.h | 193 +++++-------------------------
arch/powerpc/include/asm/kvm_book3s_asm.h | 6 +-
arch/powerpc/include/asm/kvm_host.h | 1 +
arch/powerpc/kernel/asm-offsets.c | 3 +-
arch/powerpc/kvm/book3s_emulate.c | 8 +-
arch/powerpc/kvm/book3s_interrupts.S | 101 ++++++++++++++++
arch/powerpc/kvm/book3s_pr.c | 68 +++++------
arch/powerpc/kvm/book3s_rmhandlers.S | 5 -
arch/powerpc/kvm/trace.h | 7 +-
9 files changed, 175 insertions(+), 217 deletions(-)
diff --git a/arch/powerpc/include/asm/kvm_book3s.h
b/arch/powerpc/include/asm/kvm_book3s.h
index 08891d0..5d68f6c 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -198,149 +198,97 @@ extern void kvm_return_point(void);
#include <asm/kvm_book3s_64.h>
#endif
-#ifdef CONFIG_KVM_BOOK3S_PR
-
-static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
-{
- return to_book3s(vcpu)->hior;
-}
-
-static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
- unsigned long pending_now, unsigned long old_pending)
-{
- if (pending_now)
- vcpu->arch.shared->int_pending = 1;
- else if (old_pending)
- vcpu->arch.shared->int_pending = 0;
-}
-
static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
{
- if ( num < 14 ) {
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- svcpu->gpr[num] = val;
- svcpu_put(svcpu);
- to_book3s(vcpu)->shadow_vcpu->gpr[num] = val;
- } else
- vcpu->arch.gpr[num] = val;
+ vcpu->arch.gpr[num] = val;
}
static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
{
- if ( num < 14 ) {
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- ulong r = svcpu->gpr[num];
- svcpu_put(svcpu);
- return r;
- } else
- return vcpu->arch.gpr[num];
+ return vcpu->arch.gpr[num];
}
static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- svcpu->cr = val;
- svcpu_put(svcpu);
- to_book3s(vcpu)->shadow_vcpu->cr = val;
+ vcpu->arch.cr = val;
}
static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- u32 r;
- r = svcpu->cr;
- svcpu_put(svcpu);
- return r;
+ return vcpu->arch.cr;
}
static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- svcpu->xer = val;
- to_book3s(vcpu)->shadow_vcpu->xer = val;
- svcpu_put(svcpu);
+ vcpu->arch.xer = val;
}
static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- u32 r;
- r = svcpu->xer;
- svcpu_put(svcpu);
- return r;
+ return vcpu->arch.xer;
}
static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- svcpu->ctr = val;
- svcpu_put(svcpu);
+ vcpu->arch.ctr = val;
}
static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- ulong r;
- r = svcpu->ctr;
- svcpu_put(svcpu);
- return r;
+ return vcpu->arch.ctr;
}
static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- svcpu->lr = val;
- svcpu_put(svcpu);
+ vcpu->arch.lr = val;
}
static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- ulong r;
- r = svcpu->lr;
- svcpu_put(svcpu);
- return r;
+ return vcpu->arch.lr;
}
static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- svcpu->pc = val;
- svcpu_put(svcpu);
+ vcpu->arch.pc = val;
}
static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- ulong r;
- r = svcpu->pc;
- svcpu_put(svcpu);
- return r;
+ return vcpu->arch.pc;
}
static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
{
ulong pc = kvmppc_get_pc(vcpu);
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- u32 r;
/* Load the instruction manually if it failed to do so in the
* exit path */
- if (svcpu->last_inst == KVM_INST_FETCH_FAILED)
- kvmppc_ld(vcpu, &pc, sizeof(u32), &svcpu->last_inst, false);
+ if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
+ kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
- r = svcpu->last_inst;
- svcpu_put(svcpu);
- return r;
+ return vcpu->arch.last_inst;
}
static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- ulong r;
- r = svcpu->fault_dar;
- svcpu_put(svcpu);
- return r;
+ return vcpu->arch.fault_dar;
+}
+
+#ifdef CONFIG_KVM_BOOK3S_PR
+
+static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
+{
+ return to_book3s(vcpu)->hior;
+}
+
+static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
+ unsigned long pending_now, unsigned long old_pending)
+{
+ if (pending_now)
+ vcpu->arch.shared->int_pending = 1;
+ else if (old_pending)
+ vcpu->arch.shared->int_pending = 0;
}
static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
@@ -374,83 +322,6 @@ static inline void kvmppc_update_int_pending(struct
kvm_vcpu *vcpu,
{
}
-static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
-{
- vcpu->arch.gpr[num] = val;
-}
-
-static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
-{
- return vcpu->arch.gpr[num];
-}
-
-static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
-{
- vcpu->arch.cr = val;
-}
-
-static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.cr;
-}
-
-static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
-{
- vcpu->arch.xer = val;
-}
-
-static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.xer;
-}
-
-static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
-{
- vcpu->arch.ctr = val;
-}
-
-static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.ctr;
-}
-
-static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
-{
- vcpu->arch.lr = val;
-}
-
-static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.lr;
-}
-
-static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
-{
- vcpu->arch.pc = val;
-}
-
-static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.pc;
-}
-
-static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
-{
- ulong pc = kvmppc_get_pc(vcpu);
-
- /* Load the instruction manually if it failed to do so in the
- * exit path */
- if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
- kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
-
- return vcpu->arch.last_inst;
-}
-
-static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.fault_dar;
-}
-
static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
{
return false;
diff --git a/arch/powerpc/include/asm/kvm_book3s_asm.h
b/arch/powerpc/include/asm/kvm_book3s_asm.h
index 9039d3c..4141409 100644
--- a/arch/powerpc/include/asm/kvm_book3s_asm.h
+++ b/arch/powerpc/include/asm/kvm_book3s_asm.h
@@ -108,14 +108,14 @@ struct kvmppc_book3s_shadow_vcpu {
ulong gpr[14];
u32 cr;
u32 xer;
-
- u32 fault_dsisr;
- u32 last_inst;
ulong ctr;
ulong lr;
ulong pc;
+
ulong shadow_srr1;
ulong fault_dar;
+ u32 fault_dsisr;
+ u32 last_inst;
#ifdef CONFIG_PPC_BOOK3S_32
u32 sr[16]; /* Guest SRs */
diff --git a/arch/powerpc/include/asm/kvm_host.h
b/arch/powerpc/include/asm/kvm_host.h
index 3328353..7b26395 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -463,6 +463,7 @@ struct kvm_vcpu_arch {
u32 ctrl;
ulong dabr;
ulong cfar;
+ ulong shadow_srr1;
#endif
u32 vrsave; /* also USPRG0 */
u32 mmucr;
diff --git a/arch/powerpc/kernel/asm-offsets.c
b/arch/powerpc/kernel/asm-offsets.c
index a67c76e..aa61629 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -515,12 +515,11 @@ int main(void)
DEFINE(VCPU_TRAP, offsetof(struct kvm_vcpu, arch.trap));
DEFINE(VCPU_PTID, offsetof(struct kvm_vcpu, arch.ptid));
DEFINE(VCPU_CFAR, offsetof(struct kvm_vcpu, arch.cfar));
+ DEFINE(VCPU_SHADOW_SRR1, offsetof(struct kvm_vcpu, arch.shadow_srr1));
DEFINE(VCORE_ENTRY_EXIT, offsetof(struct kvmppc_vcore,
entry_exit_count));
DEFINE(VCORE_NAP_COUNT, offsetof(struct kvmppc_vcore, nap_count));
DEFINE(VCORE_IN_GUEST, offsetof(struct kvmppc_vcore, in_guest));
DEFINE(VCORE_NAPPING_THREADS, offsetof(struct kvmppc_vcore,
napping_threads));
- DEFINE(VCPU_SVCPU, offsetof(struct kvmppc_vcpu_book3s, shadow_vcpu) -
- offsetof(struct kvmppc_vcpu_book3s, vcpu));
DEFINE(VCPU_SLB_E, offsetof(struct kvmppc_slb, orige));
DEFINE(VCPU_SLB_V, offsetof(struct kvmppc_slb, origv));
DEFINE(VCPU_SLB_SIZE, sizeof(struct kvmppc_slb));
diff --git a/arch/powerpc/kvm/book3s_emulate.c
b/arch/powerpc/kvm/book3s_emulate.c
index 360ce68..34044b1 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -267,12 +267,9 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct
kvm_vcpu *vcpu,
r = kvmppc_st(vcpu, &addr, 32, zeros, true);
if ((r == -ENOENT) || (r == -EPERM)) {
- struct kvmppc_book3s_shadow_vcpu *svcpu;
-
- svcpu = svcpu_get(vcpu);
*advance = 0;
vcpu->arch.shared->dar = vaddr;
- svcpu->fault_dar = vaddr;
+ vcpu->arch.fault_dar = vaddr;
dsisr = DSISR_ISSTORE;
if (r == -ENOENT)
@@ -281,8 +278,7 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct
kvm_vcpu *vcpu,
dsisr |= DSISR_PROTFAULT;
vcpu->arch.shared->dsisr = dsisr;
- svcpu->fault_dsisr = dsisr;
- svcpu_put(svcpu);
+ vcpu->arch.fault_dsisr = dsisr;
kvmppc_book3s_queue_irqprio(vcpu,
BOOK3S_INTERRUPT_DATA_STORAGE);
diff --git a/arch/powerpc/kvm/book3s_interrupts.S
b/arch/powerpc/kvm/book3s_interrupts.S
index 17cfae5..c935195 100644
--- a/arch/powerpc/kvm/book3s_interrupts.S
+++ b/arch/powerpc/kvm/book3s_interrupts.S
@@ -26,8 +26,12 @@
#if defined(CONFIG_PPC_BOOK3S_64)
#define FUNC(name) GLUE(.,name)
+#define GET_SHADOW_VCPU(reg) mr reg, r13
+
#elif defined(CONFIG_PPC_BOOK3S_32)
#define FUNC(name) name
+#define GET_SHADOW_VCPU(reg) lwz reg, (THREAD + THREAD_KVM_SVCPU)(r2)
+
#endif /* CONFIG_PPC_BOOK3S_XX */
#define VCPU_LOAD_NVGPRS(vcpu) \
@@ -87,8 +91,49 @@ kvm_start_entry:
VCPU_LOAD_NVGPRS(r4)
kvm_start_lightweight:
+ /* Copy registers into shadow vcpu so we can access them in real mode */
+ GET_SHADOW_VCPU(r3)
+ PPC_LL r5, VCPU_GPR(R0)(r4)
+ PPC_LL r6, VCPU_GPR(R1)(r4)
+ PPC_LL r7, VCPU_GPR(R2)(r4)
+ PPC_LL r8, VCPU_GPR(R3)(r4)
+ PPC_STL r5, SVCPU_R0(r3)
+ PPC_STL r6, SVCPU_R1(r3)
+ PPC_STL r7, SVCPU_R2(r3)
+ PPC_STL r8, SVCPU_R3(r3)
+ PPC_LL r5, VCPU_GPR(R4)(r4)
+ PPC_LL r6, VCPU_GPR(R5)(r4)
+ PPC_LL r7, VCPU_GPR(R6)(r4)
+ PPC_LL r8, VCPU_GPR(R7)(r4)
+ PPC_STL r5, SVCPU_R4(r3)
+ PPC_STL r6, SVCPU_R5(r3)
+ PPC_STL r7, SVCPU_R6(r3)
+ PPC_STL r8, SVCPU_R7(r3)
+ PPC_LL r5, VCPU_GPR(R8)(r4)
+ PPC_LL r6, VCPU_GPR(R9)(r4)
+ PPC_LL r7, VCPU_GPR(R10)(r4)
+ PPC_LL r8, VCPU_GPR(R11)(r4)
+ PPC_STL r5, SVCPU_R8(r3)
+ PPC_STL r6, SVCPU_R9(r3)
+ PPC_STL r7, SVCPU_R10(r3)
+ PPC_STL r8, SVCPU_R11(r3)
+ PPC_LL r5, VCPU_GPR(R12)(r4)
+ PPC_LL r6, VCPU_GPR(R13)(r4)
+ lwz r7, VCPU_CR(r4)
+ PPC_LL r8, VCPU_XER(r4)
+ PPC_STL r5, SVCPU_R12(r3)
+ PPC_STL r6, SVCPU_R13(r3)
+ stw r7, SVCPU_CR(r3)
+ stw r8, SVCPU_XER(r3)
+ PPC_LL r5, VCPU_CTR(r4)
+ PPC_LL r6, VCPU_LR(r4)
+ PPC_LL r7, VCPU_PC(r4)
+ PPC_STL r5, SVCPU_CTR(r3)
+ PPC_STL r6, SVCPU_LR(r3)
+ PPC_STL r7, SVCPU_PC(r3)
#ifdef CONFIG_PPC_BOOK3S_64
+ /* Get the dcbz32 flag */
PPC_LL r3, VCPU_HFLAGS(r4)
rldicl r3, r3, 0, 63 /* r3 &= 1 */
stb r3, HSTATE_RESTORE_HID5(r13)
@@ -128,6 +173,61 @@ kvmppc_handler_highmem:
/* R7 = vcpu */
PPC_LL r7, GPR4(r1)
+ /* Transfer reg values from shadow vcpu back to vcpu struct */
+ /* On 64-bit, interrupts are still off at this point */
+ GET_SHADOW_VCPU(r4)
+ PPC_LL r5, SVCPU_R0(r4)
+ PPC_LL r6, SVCPU_R1(r4)
+ PPC_LL r3, SVCPU_R2(r4)
+ PPC_LL r8, SVCPU_R3(r4)
+ PPC_STL r5, VCPU_GPR(R0)(r7)
+ PPC_STL r6, VCPU_GPR(R1)(r7)
+ PPC_STL r3, VCPU_GPR(R2)(r7)
+ PPC_STL r8, VCPU_GPR(R3)(r7)
+ PPC_LL r5, SVCPU_R4(r4)
+ PPC_LL r6, SVCPU_R5(r4)
+ PPC_LL r3, SVCPU_R6(r4)
+ PPC_LL r8, SVCPU_R7(r4)
+ PPC_STL r5, VCPU_GPR(R4)(r7)
+ PPC_STL r6, VCPU_GPR(R5)(r7)
+ PPC_STL r3, VCPU_GPR(R6)(r7)
+ PPC_STL r8, VCPU_GPR(R7)(r7)
+ PPC_LL r5, SVCPU_R8(r4)
+ PPC_LL r6, SVCPU_R9(r4)
+ PPC_LL r3, SVCPU_R10(r4)
+ PPC_LL r8, SVCPU_R11(r4)
+ PPC_STL r5, VCPU_GPR(R8)(r7)
+ PPC_STL r6, VCPU_GPR(R9)(r7)
+ PPC_STL r3, VCPU_GPR(R10)(r7)
+ PPC_STL r8, VCPU_GPR(R11)(r7)
+ PPC_LL r5, SVCPU_R12(r4)
+ PPC_LL r6, SVCPU_R13(r4)
+ lwz r3, SVCPU_CR(r4)
+ lwz r8, SVCPU_XER(r4)
+ PPC_STL r5, VCPU_GPR(R12)(r7)
+ PPC_STL r6, VCPU_GPR(R13)(r7)
+ stw r3, VCPU_CR(r7)
+ PPC_STL r8, VCPU_XER(r7)
+ PPC_LL r5, SVCPU_CTR(r4)
+ PPC_LL r6, SVCPU_LR(r4)
+ PPC_LL r3, SVCPU_PC(r4)
+ PPC_LL r8, SVCPU_SHADOW_SRR1(r4)
+ PPC_STL r5, VCPU_CTR(r7)
+ PPC_STL r6, VCPU_LR(r7)
+ PPC_STL r3, VCPU_PC(r7)
+ PPC_STL r8, VCPU_SHADOW_SRR1(r7)
+ PPC_LL r5, SVCPU_FAULT_DAR(r4)
+ lwz r6, SVCPU_FAULT_DSISR(r4)
+ lwz r3, SVCPU_LAST_INST(r4)
+ PPC_STL r5, VCPU_FAULT_DAR(r7)
+ stw r6, VCPU_FAULT_DSISR(r7)
+ stw r3, VCPU_LAST_INST(r7)
+
+ /* Re-enable interrupts */
+ mfmsr r3
+ ori r3, r3, MSR_EE
+ MTMSR_EERI(r3)
+
#ifdef CONFIG_PPC_BOOK3S_64
/*
* Reload kernel SPRG3 value.
@@ -135,6 +235,7 @@ kvmppc_handler_highmem:
*/
ld r3, PACA_SPRG3(r13)
mtspr SPRN_SPRG3, r3
+
#endif /* CONFIG_PPC_BOOK3S_64 */
PPC_STL r14, VCPU_GPR(R14)(r7)
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index ddfaf56..5aa64e2 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -61,8 +61,6 @@ void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
#ifdef CONFIG_PPC_BOOK3S_64
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
- memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
- sizeof(get_paca()->shadow_vcpu));
svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
svcpu_put(svcpu);
#endif
@@ -77,8 +75,6 @@ void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
#ifdef CONFIG_PPC_BOOK3S_64
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
- memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
- sizeof(get_paca()->shadow_vcpu));
to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
svcpu_put(svcpu);
#endif
@@ -388,22 +384,18 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct
kvm_vcpu *vcpu,
if (page_found == -ENOENT) {
/* Page not found in guest PTE entries */
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
- vcpu->arch.shared->dsisr = svcpu->fault_dsisr;
+ vcpu->arch.shared->dsisr = vcpu->arch.fault_dsisr;
vcpu->arch.shared->msr |=
- (svcpu->shadow_srr1 & 0x00000000f8000000ULL);
- svcpu_put(svcpu);
+ vcpu->arch.shadow_srr1 & 0x00000000f8000000ULL;
kvmppc_book3s_queue_irqprio(vcpu, vec);
} else if (page_found == -EPERM) {
/* Storage protection */
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
- vcpu->arch.shared->dsisr = svcpu->fault_dsisr & ~DSISR_NOHPTE;
+ vcpu->arch.shared->dsisr = vcpu->arch.fault_dsisr &
~DSISR_NOHPTE;
vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
vcpu->arch.shared->msr |=
- svcpu->shadow_srr1 & 0x00000000f8000000ULL;
- svcpu_put(svcpu);
+ vcpu->arch.shadow_srr1 & 0x00000000f8000000ULL;
kvmppc_book3s_queue_irqprio(vcpu, vec);
} else if (page_found == -EINVAL) {
/* Page not found in guest SLB */
@@ -623,21 +615,26 @@ int kvmppc_handle_exit(struct kvm_run *run, struct
kvm_vcpu *vcpu,
switch (exit_nr) {
case BOOK3S_INTERRUPT_INST_STORAGE:
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- ulong shadow_srr1 = svcpu->shadow_srr1;
+ ulong shadow_srr1 = vcpu->arch.shadow_srr1;
vcpu->stat.pf_instruc++;
#ifdef CONFIG_PPC_BOOK3S_32
/* We set segments as unused segments when invalidating them. So
* treat the respective fault as segment fault. */
- if (svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT] == SR_INVALID) {
- kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
- r = RESUME_GUEST;
+ {
+ struct kvmppc_book3s_shadow_vcpu *svcpu;
+ u32 sr;
+
+ svcpu = svcpu_get(vcpu);
+ sr = svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT];
svcpu_put(svcpu);
- break;
+ if (sr == SR_INVALID) {
+ kvmppc_mmu_map_segment(vcpu,
kvmppc_get_pc(vcpu));
+ r = RESUME_GUEST;
+ break;
+ }
}
#endif
- svcpu_put(svcpu);
/* only care about PTEG not found errors, but leave NX alone */
if (shadow_srr1 & 0x40000000) {
@@ -662,21 +659,26 @@ int kvmppc_handle_exit(struct kvm_run *run, struct
kvm_vcpu *vcpu,
case BOOK3S_INTERRUPT_DATA_STORAGE:
{
ulong dar = kvmppc_get_fault_dar(vcpu);
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- u32 fault_dsisr = svcpu->fault_dsisr;
+ u32 fault_dsisr = vcpu->arch.fault_dsisr;
vcpu->stat.pf_storage++;
#ifdef CONFIG_PPC_BOOK3S_32
/* We set segments as unused segments when invalidating them. So
* treat the respective fault as segment fault. */
- if ((svcpu->sr[dar >> SID_SHIFT]) == SR_INVALID) {
- kvmppc_mmu_map_segment(vcpu, dar);
- r = RESUME_GUEST;
+ {
+ struct kvmppc_book3s_shadow_vcpu *svcpu;
+ u32 sr;
+
+ svcpu = svcpu_get(vcpu);
+ sr = svcpu->sr[dar >> SID_SHIFT];
svcpu_put(svcpu);
- break;
+ if (sr == SR_INVALID) {
+ kvmppc_mmu_map_segment(vcpu, dar);
+ r = RESUME_GUEST;
+ break;
+ }
}
#endif
- svcpu_put(svcpu);
/* The only case we need to handle is missing shadow PTEs */
if (fault_dsisr & DSISR_NOHPTE) {
@@ -723,13 +725,10 @@ int kvmppc_handle_exit(struct kvm_run *run, struct
kvm_vcpu *vcpu,
case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
{
enum emulation_result er;
- struct kvmppc_book3s_shadow_vcpu *svcpu;
ulong flags;
program_interrupt:
- svcpu = svcpu_get(vcpu);
- flags = svcpu->shadow_srr1 & 0x1f0000ull;
- svcpu_put(svcpu);
+ flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
if (vcpu->arch.shared->msr & MSR_PR) {
#ifdef EXIT_DEBUG
@@ -861,9 +860,7 @@ program_interrupt:
break;
default:
{
- struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
- ulong shadow_srr1 = svcpu->shadow_srr1;
- svcpu_put(svcpu);
+ ulong shadow_srr1 = vcpu->arch.shadow_srr1;
/* Ugh - bork here! What did we get? */
printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
@@ -1037,11 +1034,12 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm
*kvm, unsigned int id)
if (!vcpu_book3s)
goto out;
+#ifdef CONFIG_KVM_BOOK3S_32
vcpu_book3s->shadow_vcpu =
kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
if (!vcpu_book3s->shadow_vcpu)
goto free_vcpu;
-
+#endif
vcpu = &vcpu_book3s->vcpu;
err = kvm_vcpu_init(vcpu, kvm, id);
if (err)
@@ -1074,8 +1072,10 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm
*kvm, unsigned int id)
uninit_vcpu:
kvm_vcpu_uninit(vcpu);
free_shadow_vcpu:
+#ifdef CONFIG_KVM_BOOK3S_32
kfree(vcpu_book3s->shadow_vcpu);
free_vcpu:
+#endif
vfree(vcpu_book3s);
out:
return ERR_PTR(err);
diff --git a/arch/powerpc/kvm/book3s_rmhandlers.S
b/arch/powerpc/kvm/book3s_rmhandlers.S
index 8f7633e..b64d7f9 100644
--- a/arch/powerpc/kvm/book3s_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_rmhandlers.S
@@ -179,11 +179,6 @@ _GLOBAL(kvmppc_entry_trampoline)
li r6, MSR_IR | MSR_DR
andc r6, r5, r6 /* Clear DR and IR in MSR value */
- /*
- * Set EE in HOST_MSR so that it's enabled when we get into our
- * C exit handler function
- */
- ori r5, r5, MSR_EE
mtsrr0 r7
mtsrr1 r6
RFI
diff --git a/arch/powerpc/kvm/trace.h b/arch/powerpc/kvm/trace.h
index e326489..a088e9a 100644
--- a/arch/powerpc/kvm/trace.h
+++ b/arch/powerpc/kvm/trace.h
@@ -101,17 +101,12 @@ TRACE_EVENT(kvm_exit,
),
TP_fast_assign(
-#ifdef CONFIG_KVM_BOOK3S_PR
- struct kvmppc_book3s_shadow_vcpu *svcpu;
-#endif
__entry->exit_nr = exit_nr;
__entry->pc = kvmppc_get_pc(vcpu);
__entry->dar = kvmppc_get_fault_dar(vcpu);
__entry->msr = vcpu->arch.shared->msr;
#ifdef CONFIG_KVM_BOOK3S_PR
- svcpu = svcpu_get(vcpu);
- __entry->srr1 = svcpu->shadow_srr1;
- svcpu_put(svcpu);
+ __entry->srr1 = vcpu->arch.shadow_srr1;
#endif
__entry->last_inst = vcpu->arch.last_inst;
),
--
1.8.3.1
--
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