diff options
| author | Scott Wood <scottwood@freescale.com> | 2011-04-27 17:24:10 -0500 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-05-22 08:47:50 -0400 |
| commit | eab176722f4628b2d9cf76221a43dd3a0e37e632 (patch) | |
| tree | 4b1e9e9ecb6adc4fb97c47ad5a3c174d3ad942ef /arch/powerpc/kvm/powerpc.c | |
| parent | 1a040b26c5c915b317103b87ae7006d40443f197 (diff) | |
KVM: PPC: booke: save/restore VRSAVE (a.k.a. USPRG0)
Linux doesn't use USPRG0 (now renamed VRSAVE in the architecture, even
when Altivec isn't involved), but a guest might.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/powerpc.c')
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index ec3d2e75c0a..9e6aa8bfd16 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -298,12 +298,25 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { +#ifdef CONFIG_BOOKE + /* + * vrsave (formerly usprg0) isn't used by Linux, but may + * be used by the guest. + * + * On non-booke this is associated with Altivec and + * is handled by code in book3s.c. + */ + mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); +#endif kvmppc_core_vcpu_load(vcpu, cpu); } void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) { kvmppc_core_vcpu_put(vcpu); +#ifdef CONFIG_BOOKE + vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); +#endif } int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |