From c447e76b4cabb49ddae8e49c5758f031f35d55fb Mon Sep 17 00:00:00 2001 From: Liang Li Date: Thu, 21 May 2015 04:41:25 +0800 Subject: kvm/fpu: Enable eager restore kvm FPU for MPX The MPX feature requires eager KVM FPU restore support. We have verified that MPX cannot work correctly with the current lazy KVM FPU restore mechanism. Eager KVM FPU restore should be enabled if the MPX feature is exposed to VM. Signed-off-by: Yang Zhang Signed-off-by: Liang Li [Also activate the FPU on AMD processors. - Paolo] Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini --- arch/x86/include/asm/kvm_host.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 5a1faf3f043e..f4a555beef19 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -401,6 +401,7 @@ struct kvm_vcpu_arch { struct kvm_mmu_memory_cache mmu_page_header_cache; struct fpu guest_fpu; + bool eager_fpu; u64 xcr0; u64 guest_supported_xcr0; u32 guest_xstate_size; -- cgit v1.2.3