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KVM: Fix OSXSAVE after migration

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commit 3ea3aa8cf6 upstream.

CPUID's OSXSAVE is a mirror of CR4.OSXSAVE bit. We need to update the CPUID
after migration.

KVM-Stable-Tag.
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sheng Yang 2010-12-08 10:49:43 +08:00 committed by Greg Kroah-Hartman
parent 918a0ca6d4
commit b6346defbc
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kvm/x86.c
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@ -5112,6 +5112,8 @@ 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.cr3);
mmu_reset_needed = 1;