From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755842Ab2JLGmL (ORCPT ); Fri, 12 Oct 2012 02:42:11 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:4342 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751477Ab2JLGmI (ORCPT ); Fri, 12 Oct 2012 02:42:08 -0400 X-IronPort-AV: E=Sophos;i="4.80,576,1344182400"; d="scan'208";a="5988189" Message-ID: <5077BB7B.4030203@cn.fujitsu.com> Date: Fri, 12 Oct 2012 14:40:59 +0800 From: Zhang Yanfei User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100921 Fedora/3.1.4-1.fc14 Thunderbird/3.1.4 MIME-Version: 1.0 To: x86@kernel.org, kexec@lists.infradead.org, linux-doc@vger.kernel.org, Avi Kivity , mtosatti@redhat.com CC: linux-kernel@vger.kernel.org, "kvm@vger.kernel.org" Subject: [PATCH 0/3] x86: clear vmcss on all cpus when doing kdump if necessary X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/10/12 14:41:53, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/10/12 14:41:54, Serialize complete at 2012/10/12 14:41:54 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, kdump just makes all the logical processors leave VMX operation by executing VMXOFF instruction, so any VMCSs active on the logical processors may be corrupted. But, sometimes, we need the VMCSs to debug guest images contained in the host vmcore. To prevent the corruption, we should VMCLEAR the VMCSs before executing the VMXOFF instruction. The patch set provides an alternative way to clear VMCSs related to guests on all cpus when host is doing kdump. zhangyanfei (3): x86/kexec: clear vmcss on all cpus if necessary KVM: make crash_clear_loaded_vmcss valid when kvm_intel is loaded sysctl: introduce a new interface to control kdump-vmcs-clear behaviour Documentation/sysctl/kernel.txt | 8 ++++++++ arch/x86/include/asm/kexec.h | 3 +++ arch/x86/kernel/crash.c | 23 +++++++++++++++++++++++ arch/x86/kvm/vmx.c | 9 +++++++++ kernel/sysctl.c | 10 ++++++++++ 5 files changed, 53 insertions(+), 0 deletions(-)