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-rw-r--r--arch/powerpc/include/asm/kvm_book3s.h1
-rw-r--r--arch/powerpc/kvm/book3s_emulate.c6
-rw-r--r--arch/powerpc/kvm/book3s_pr.c9
3 files changed, 13 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
index 61667913ec98..6acf0c2a0f99 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -182,6 +182,7 @@ extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
struct kvm_memory_slot *memslot, unsigned long *map);
extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr,
unsigned long mask);
+extern void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr);
extern void kvmppc_entry_trampoline(void);
extern void kvmppc_hv_entry_trampoline(void);
diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index 84fddcd6c1f8..5a2bc4b0dfe5 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -449,10 +449,10 @@ int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
case SPRN_GQR7:
to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
break;
+#ifdef CONFIG_PPC_BOOK3S_64
case SPRN_FSCR:
- vcpu->arch.fscr = spr_val;
+ kvmppc_set_fscr(vcpu, spr_val);
break;
-#ifdef CONFIG_PPC_BOOK3S_64
case SPRN_BESCR:
vcpu->arch.bescr = spr_val;
break;
@@ -593,10 +593,10 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val
case SPRN_GQR7:
*spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
break;
+#ifdef CONFIG_PPC_BOOK3S_64
case SPRN_FSCR:
*spr_val = vcpu->arch.fscr;
break;
-#ifdef CONFIG_PPC_BOOK3S_64
case SPRN_BESCR:
*spr_val = vcpu->arch.bescr;
break;
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index e7a1fa2517b1..faffb27badd9 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -871,6 +871,15 @@ static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac)
return RESUME_GUEST;
}
+
+void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr)
+{
+ if ((vcpu->arch.fscr & FSCR_TAR) && !(fscr & FSCR_TAR)) {
+ /* TAR got dropped, drop it in shadow too */
+ kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
+ }
+ vcpu->arch.fscr = fscr;
+}
#endif
int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,