KVM: SVM: Fix FPU leak while emulating clts

The clts code didn't use set_cr0 properly, so our lazy FPU
processing wasn't being done by the clts instruction at all.

(this isn't called on Intel as the hardware does the decode for us)

Signed-off-by: Amit Shah <amit.shah@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 07ae280e8fe5c279f7077b1e95650949002e44d7..47c10b8f89b3f00a16674fec744e334590f523d7 100644 (file)
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -1188,8 +1188,7 @@ int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
 
 int emulate_clts(struct kvm_vcpu *vcpu)
 {
-       vcpu->cr0 &= ~X86_CR0_TS;
-       kvm_x86_ops->set_cr0(vcpu, vcpu->cr0);
+       kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
        return X86EMUL_CONTINUE;
 }