diff options
| author | Avi Kivity <avi@redhat.com> | 2010-01-21 15:31:47 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 12:36:04 -0300 |
| commit | 6b52d18605f580bdffaffd48c8da228c3e848deb (patch) | |
| tree | b2bf6e704dc5c0b44714d38c955460d70f76b913 /arch | |
| parent | e5bb40251a920cdd9d12c569c6aab0bdd0279e4e (diff) | |
| download | linux-6b52d18605f580bdffaffd48c8da228c3e848deb.tar.bz2 | |
KVM: Activate fpu on clts
Assume that if the guest executes clts, it knows what it's doing, and load the
guest fpu to prevent an #NM exception.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/svm.c | 8 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 1 |
4 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index d73ed48587e4..7ebf9fe670cd 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -511,6 +511,7 @@ struct kvm_x86_ops { void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); + void (*fpu_activate)(struct kvm_vcpu *vcpu); void (*fpu_deactivate)(struct kvm_vcpu *vcpu); void (*tlb_flush)(struct kvm_vcpu *vcpu); diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index a281368c3b96..800208a60a51 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1259,12 +1259,17 @@ static int ud_interception(struct vcpu_svm *svm) return 1; } -static int nm_interception(struct vcpu_svm *svm) +static void svm_fpu_activate(struct kvm_vcpu *vcpu) { + struct vcpu_svm *svm = to_svm(vcpu); svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR); svm->vcpu.fpu_active = 1; update_cr0_intercept(svm); +} +static int nm_interception(struct vcpu_svm *svm) +{ + svm_fpu_activate(&svm->vcpu); return 1; } @@ -2977,6 +2982,7 @@ static struct kvm_x86_ops svm_x86_ops = { .cache_reg = svm_cache_reg, .get_rflags = svm_get_rflags, .set_rflags = svm_set_rflags, + .fpu_activate = svm_fpu_activate, .fpu_deactivate = svm_fpu_deactivate, .tlb_flush = svm_flush_tlb, diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index b7e812e9c299..fad871cbed19 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -3002,6 +3002,7 @@ static int handle_cr(struct kvm_vcpu *vcpu) vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); trace_kvm_cr_write(0, kvm_read_cr0(vcpu)); skip_emulated_instruction(vcpu); + vmx_fpu_activate(vcpu); return 1; case 1: /*mov from cr*/ switch (cr) { diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c61ec9c69267..4db0c8a9082e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3269,6 +3269,7 @@ int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) int emulate_clts(struct kvm_vcpu *vcpu) { kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); + kvm_x86_ops->fpu_activate(vcpu); return X86EMUL_CONTINUE; } |