From b6346defbc8afe642fb76736b7f59bb1fc6cc0a4 Mon Sep 17 00:00:00 2001 From: Sheng Yang Date: Wed, 8 Dec 2010 10:49:43 +0800 Subject: [PATCH] KVM: Fix OSXSAVE after migration commit 3ea3aa8cf67d3bbe00a19b6a4013d19efa7d0f41 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 Signed-off-by: Avi Kivity Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/x86.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index fd9911b9e38b..a5746de6f402 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -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; -- 2.34.1