From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sheng Yang Subject: [PATCH] KVM: Fix OSXSAVE after migration Date: Wed, 8 Dec 2010 10:49:43 +0800 Message-ID: <1291776583-9979-1-git-send-email-sheng@linux.intel.com> Cc: kvm@vger.kernel.org, Sheng Yang , stable@kernel.org To: Avi Kivity , Marcelo Tosatti Return-path: Received: from mga11.intel.com ([192.55.52.93]:32231 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754712Ab0LHCqz (ORCPT ); Tue, 7 Dec 2010 21:46:55 -0500 Sender: kvm-owner@vger.kernel.org List-ID: CPUID's OSXSAVE is a mirror of CR4.OSXSAVE bit. We need to update the CPUID after migration. Cc: stable@kernel.org Signed-off-by: Sheng Yang --- arch/x86/kvm/x86.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) 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; -- 1.7.0.1