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KVM: Fix OSXSAVE after migration

Message ID 1291776583-9979-1-git-send-email-sheng@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Sheng Yang Dec. 8, 2010, 2:49 a.m. UTC 
None
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Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ed373ba..51a2bce 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5585,6 +5585,8 @@  int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 
 	mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
 	kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
+	if (sregs->cr4 & X86_CR4_OSXSAVE)
+		update_cpuid(vcpu);
 	if (!is_long_mode(vcpu) && is_pae(vcpu)) {
 		load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3);
 		mmu_reset_needed = 1;