From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964969AbWLMNOk (ORCPT ); Wed, 13 Dec 2006 08:14:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964963AbWLMNOS (ORCPT ); Wed, 13 Dec 2006 08:14:18 -0500 Received: from il.qumranet.com ([62.219.232.206]:47433 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964960AbWLMNOO (ORCPT ); Wed, 13 Dec 2006 08:14:14 -0500 Subject: [PATCH 3/3] KVM: AMD SVM: Save and restore the floating point unit state From: Avi Kivity Date: Wed, 13 Dec 2006 12:45:57 -0000 To: kvm-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, mingo@elte.hu References: <457FF542.6050602@qumranet.com> In-Reply-To: <457FF542.6050602@qumranet.com> Message-Id: <20061213124557.102AB2502E4@il.qumranet.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Fixes sf bug 1614113 (segfaults in nbench). Signed-off-by: Avi Kivity Index: linux-2.6/drivers/kvm/svm.c =================================================================== --- linux-2.6.orig/drivers/kvm/svm.c +++ linux-2.6/drivers/kvm/svm.c @@ -575,6 +575,8 @@ static int svm_create_vcpu(struct kvm_vc memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs)); init_vmcb(vcpu->svm->vmcb); + fx_init(vcpu); + return 0; out2: @@ -1387,6 +1389,10 @@ again: save_db_regs(vcpu->svm->host_db_regs); load_db_regs(vcpu->svm->db_regs); } + + fx_save(vcpu->host_fx_image); + fx_restore(vcpu->guest_fx_image); + asm volatile ( #ifdef CONFIG_X86_64 "push %%rbx; push %%rcx; push %%rdx;" @@ -1496,6 +1502,9 @@ again: #endif : "cc", "memory" ); + fx_save(vcpu->guest_fx_image); + fx_restore(vcpu->host_fx_image); + if ((vcpu->svm->vmcb->save.dr7 & 0xff)) load_db_regs(vcpu->svm->host_db_regs);