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-rw-r--r--arch/powerpc/include/asm/kvm_host.h4
-rw-r--r--arch/powerpc/include/asm/kvm_ppc.h9
-rw-r--r--arch/powerpc/kernel/asm-offsets.c2
-rw-r--r--arch/powerpc/kvm/44x_tlb.c39
-rw-r--r--arch/powerpc/kvm/booke_guest.c2
-rw-r--r--arch/powerpc/kvm/booke_interrupts.S2
-rw-r--r--arch/powerpc/kvm/emulate.c2
7 files changed, 41 insertions, 19 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 4338b03da8f..34b52b7180c 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -129,7 +129,11 @@ struct kvm_vcpu_arch {
u32 ivor[16];
u32 ivpr;
u32 pir;
+
+ u32 shadow_pid;
u32 pid;
+ u32 swap_pid;
+
u32 pvr;
u32 ccr0;
u32 ccr1;
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 8e7e4295990..8931ba729d2 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -64,6 +64,7 @@ extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn,
extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
gva_t eend, u32 asid);
extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
+extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
/* XXX Book E specific */
extern void kvmppc_tlbe_set_modified(struct kvm_vcpu *vcpu, unsigned int i);
@@ -95,4 +96,12 @@ static inline void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
kvm_vcpu_block(vcpu);
}
+static inline void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 new_pid)
+{
+ if (vcpu->arch.pid != new_pid) {
+ vcpu->arch.pid = new_pid;
+ vcpu->arch.swap_pid = 1;
+ }
+}
+
#endif /* __POWERPC_KVM_PPC_H__ */
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 1631d670b9e..52649da344f 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -369,7 +369,7 @@ int main(void)
DEFINE(VCPU_SPRG5, offsetof(struct kvm_vcpu, arch.sprg5));
DEFINE(VCPU_SPRG6, offsetof(struct kvm_vcpu, arch.sprg6));
DEFINE(VCPU_SPRG7, offsetof(struct kvm_vcpu, arch.sprg7));
- DEFINE(VCPU_PID, offsetof(struct kvm_vcpu, arch.pid));
+ DEFINE(VCPU_SHADOW_PID, offsetof(struct kvm_vcpu, arch.shadow_pid));
DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst));
DEFINE(VCPU_FAULT_DEAR, offsetof(struct kvm_vcpu, arch.fault_dear));
diff --git a/arch/powerpc/kvm/44x_tlb.c b/arch/powerpc/kvm/44x_tlb.c
index 06a5fcfc4d3..3594bbd1f61 100644
--- a/arch/powerpc/kvm/44x_tlb.c
+++ b/arch/powerpc/kvm/44x_tlb.c
@@ -170,7 +170,7 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn, u64 asid,
/* XXX what about AS? */
- stlbe->tid = asid & 0xff;
+ stlbe->tid = !(asid & 0xff);
/* Force TS=1 for all guest mappings. */
/* For now we hardcode 4KB mappings, but it will be important to
@@ -190,7 +190,7 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn, u64 asid,
void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
gva_t eend, u32 asid)
{
- unsigned int pid = asid & 0xff;
+ unsigned int pid = !(asid & 0xff);
int i;
/* XXX Replace loop with fancy data structures. */
@@ -222,23 +222,30 @@ void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
up_write(&current->mm->mmap_sem);
}
-/* Invalidate all mappings, so that when they fault back in they will get the
- * proper permission bits. */
+/* Invalidate all mappings on the privilege switch after PID has been changed.
+ * The guest always runs with PID=1, so we must clear the entire TLB when
+ * switching address spaces. */
void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode)
{
int i;
- /* XXX Replace loop with fancy data structures. */
- down_write(&current->mm->mmap_sem);
- for (i = 0; i <= tlb_44x_hwater; i++) {
- struct tlbe *stlbe = &vcpu->arch.shadow_tlb[i];
-
- kvmppc_44x_shadow_release(vcpu, i);
- stlbe->word0 = 0;
- kvmppc_tlbe_set_modified(vcpu, i);
- KVMTRACE_5D(STLB_INVAL, vcpu, i,
- stlbe->tid, stlbe->word0, stlbe->word1,
- stlbe->word2, handler);
+ if (vcpu->arch.swap_pid) {
+ /* XXX Replace loop with fancy data structures. */
+ down_write(&current->mm->mmap_sem);
+ for (i = 0; i <= tlb_44x_hwater; i++) {
+ struct tlbe *stlbe = &vcpu->arch.shadow_tlb[i];
+
+ /* Future optimization: clear only userspace mappings. */
+ kvmppc_44x_shadow_release(vcpu, i);
+ stlbe->word0 = 0;
+ kvmppc_tlbe_set_modified(vcpu, i);
+ KVMTRACE_5D(STLB_INVAL, vcpu, i,
+ stlbe->tid, stlbe->word0, stlbe->word1,
+ stlbe->word2, handler);
+ }
+ up_write(&current->mm->mmap_sem);
+ vcpu->arch.swap_pid = 0;
}
- up_write(&current->mm->mmap_sem);
+
+ vcpu->arch.shadow_pid = !usermode;
}
diff --git a/arch/powerpc/kvm/booke_guest.c b/arch/powerpc/kvm/booke_guest.c
index 3cca079975e..7b2591e26ba 100644
--- a/arch/powerpc/kvm/booke_guest.c
+++ b/arch/powerpc/kvm/booke_guest.c
@@ -486,6 +486,8 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.msr = 0;
vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
+ vcpu->arch.shadow_pid = 1;
+
/* Eye-catching number so we know if the guest takes an interrupt
* before it's programmed its own IVPR. */
vcpu->arch.ivpr = 0x55550000;
diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S
index 564ea32ecba..95e165baf85 100644
--- a/arch/powerpc/kvm/booke_interrupts.S
+++ b/arch/powerpc/kvm/booke_interrupts.S
@@ -332,7 +332,7 @@ lightweight_exit:
mfspr r3, SPRN_PID
stw r3, VCPU_HOST_PID(r4)
- lwz r3, VCPU_PID(r4)
+ lwz r3, VCPU_SHADOW_PID(r4)
mtspr SPRN_PID, r3
/* Prevent all asynchronous TLB updates. */
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index c3ed63b2221..0fce4fbdc20 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -508,7 +508,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
case SPRN_MMUCR:
vcpu->arch.mmucr = vcpu->arch.gpr[rs]; break;
case SPRN_PID:
- vcpu->arch.pid = vcpu->arch.gpr[rs]; break;
+ kvmppc_set_pid(vcpu, vcpu->arch.gpr[rs]); break;
case SPRN_CCR0:
vcpu->arch.ccr0 = vcpu->arch.gpr[rs]; break;
case SPRN_CCR1: