From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753898AbXJULJc (ORCPT ); Sun, 21 Oct 2007 07:09:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751601AbXJULH5 (ORCPT ); Sun, 21 Oct 2007 07:07:57 -0400 Received: from il.qumranet.com ([82.166.9.18]:58442 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751477AbXJULHy (ORCPT ); Sun, 21 Oct 2007 07:07:54 -0400 From: Avi Kivity To: kvm-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, Eddie Dong , Qing He , Avi Kivity Subject: [PATCH 05/11] KVM: VMX: Reset mmu context when entering real mode Date: Sun, 21 Oct 2007 13:08:06 +0200 Message-Id: <11929648922970-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.3 In-Reply-To: <1192964892617-git-send-email-avi@qumranet.com> References: <1192964892617-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Eddie Dong Resetting an SMP guest will force AP enter real mode (RESET) with paging enabled in protected mode. While current enter_rmode() can only handle mode switch from nonpaging mode to real mode which leads to SMP reboot failure. Fix by reloading the mmu context on entering real mode. Signed-off-by: Yaozu (Eddie) Dong Signed-off-by: Qing He Signed-off-by: Avi Kivity --- drivers/kvm/mmu.c | 1 + drivers/kvm/vmx.c | 1 + 2 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c index 7171618..feb5ac9 100644 --- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -1049,6 +1049,7 @@ int kvm_mmu_reset_context(struct kvm_vcpu *vcpu) destroy_kvm_mmu(vcpu); return init_kvm_mmu(vcpu); } +EXPORT_SYMBOL_GPL(kvm_mmu_reset_context); int kvm_mmu_load(struct kvm_vcpu *vcpu) { diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index bcc1e39..f130c01 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -1128,6 +1128,7 @@ static void enter_rmode(struct kvm_vcpu *vcpu) fix_rmode_seg(VCPU_SREG_GS, &vcpu->rmode.gs); fix_rmode_seg(VCPU_SREG_FS, &vcpu->rmode.fs); + kvm_mmu_reset_context(vcpu); init_rmode_tss(vcpu->kvm); } -- 1.5.3 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: [PATCH 05/11] KVM: VMX: Reset mmu context when entering real mode Date: Sun, 21 Oct 2007 13:08:06 +0200 Message-ID: <11929648922970-git-send-email-avi@qumranet.com> References: <1192964892617-git-send-email-avi@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Avi Kivity , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Qing He To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: In-Reply-To: <1192964892617-git-send-email-avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org From: Eddie Dong Resetting an SMP guest will force AP enter real mode (RESET) with paging enabled in protected mode. While current enter_rmode() can only handle mode switch from nonpaging mode to real mode which leads to SMP reboot failure. Fix by reloading the mmu context on entering real mode. Signed-off-by: Yaozu (Eddie) Dong Signed-off-by: Qing He Signed-off-by: Avi Kivity --- drivers/kvm/mmu.c | 1 + drivers/kvm/vmx.c | 1 + 2 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c index 7171618..feb5ac9 100644 --- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -1049,6 +1049,7 @@ int kvm_mmu_reset_context(struct kvm_vcpu *vcpu) destroy_kvm_mmu(vcpu); return init_kvm_mmu(vcpu); } +EXPORT_SYMBOL_GPL(kvm_mmu_reset_context); int kvm_mmu_load(struct kvm_vcpu *vcpu) { diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index bcc1e39..f130c01 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -1128,6 +1128,7 @@ static void enter_rmode(struct kvm_vcpu *vcpu) fix_rmode_seg(VCPU_SREG_GS, &vcpu->rmode.gs); fix_rmode_seg(VCPU_SREG_FS, &vcpu->rmode.fs); + kvm_mmu_reset_context(vcpu); init_rmode_tss(vcpu->kvm); } -- 1.5.3 ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/