From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754856Ab0GEIAR (ORCPT ); Mon, 5 Jul 2010 04:00:17 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:57278 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752563Ab0GEIAM (ORCPT ); Mon, 5 Jul 2010 04:00:12 -0400 Message-ID: <4C319024.9050300@cn.fujitsu.com> Date: Mon, 05 Jul 2010 15:56:20 +0800 From: Xiao Guangrong User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: Avi Kivity CC: Marcelo Tosatti , LKML , KVM list , Jin Dongming Subject: Re: [PATCH v2] KVM: IOAPIC: only access APIC registers one dword at a time References: <4C2D6D4B.5060309@cn.fujitsu.com> <4C2D95EA.6080209@np.css.fujitsu.com> <4C2D975A.2050704@cn.fujitsu.com> <4C2D9C8C.8060401@cn.fujitsu.com> <4C2F0CC1.6020808@redhat.com> <4C3155BA.4070903@cn.fujitsu.com> <4C318FAC.8010605@redhat.com> In-Reply-To: <4C318FAC.8010605@redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Avi Kivity wrote: > >>> There might be guests that use incorrect access despite the >>> documentation; if real hardware supports it, it should work. So we need >>> to start with just a warning, and allow the access. Later we can drop >>> the invalid access. >>> >> If the OS contravene the spec, i thinks it's the OS's bug, also, i >> have tested some versions >> windows/linux guests, it's no broken, can we directly drop the other >> wide access? >> > > Well, there's the spec and there's real life, but in this case we can > try and if we see a problem we'll re-add the other access length. > OK, i'll do it as your suggestion, thanks.