From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752404Ab0G0THm (ORCPT ); Tue, 27 Jul 2010 15:07:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41825 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751195Ab0G0THl (ORCPT ); Tue, 27 Jul 2010 15:07:41 -0400 Message-ID: <4C4F2E74.3000608@redhat.com> Date: Tue, 27 Jul 2010 22:07:32 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.7) Gecko/20100720 Fedora/3.1.1-1.fc13 Thunderbird/3.1.1 MIME-Version: 1.0 To: Joerg Roedel CC: Marcelo Tosatti , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] KVM: SVM: Sync efer back into nested vmcb References: <1280247261-19115-1-git-send-email-joerg.roedel@amd.com> <1280247261-19115-2-git-send-email-joerg.roedel@amd.com> In-Reply-To: <1280247261-19115-2-git-send-email-joerg.roedel@amd.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/27/2010 07:14 PM, Joerg Roedel wrote: > This patch fixes a bug in a nested hypervisor that heavily > switches between real-mode and long-mode. The problem is > fixed by syncing back efer into the guest vmcb on emulated > vmexit. This is vmware? IIRC their old kernel was 32-bit, so they need to switch all the time. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.