From xen-devel-bounces@lists.xen.org Mon Sep 16 15:16:29 2013 Received: (at maildrop) by bugs.xenproject.org; 16 Sep 2013 14:16:29 +0000 Received: from lists.xen.org ([50.57.142.19]) by bugs.xenproject.org with esmtp (Exim 4.80) (envelope-from ) id 1VLZbJ-0004cn-72 for xen-devel-maildrop-Eithu9ie@bugs.xenproject.org; Mon, 16 Sep 2013 15:16:29 +0100 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1VLZYd-0003FD-7N; Mon, 16 Sep 2013 14:13:43 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1VLZYb-0003Eu-OW for xen-devel@lists.xen.org; Mon, 16 Sep 2013 14:13:41 +0000 Received: from [85.158.143.35:33538] by server-1.bemta-4.messagelabs.com id 33/33-16125-51217325; Mon, 16 Sep 2013 14:13:41 +0000 X-Env-Sender: fabio.fantoni@m2r.biz X-Msg-Ref: server-8.tower-21.messagelabs.com!1379340620!4465596!1 X-Originating-IP: [209.85.214.44] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 6.9.12; banners=-,-,- X-VirusChecked: Checked Received: (qmail 11959 invoked from network); 16 Sep 2013 14:10:21 -0000 Received: from mail-bk0-f44.google.com (HELO mail-bk0-f44.google.com) (209.85.214.44) by server-8.tower-21.messagelabs.com with RC4-SHA encrypted SMTP; 16 Sep 2013 14:10:21 -0000 Received: by mail-bk0-f44.google.com with SMTP id mz10so1575755bkb.31 for ; Mon, 16 Sep 2013 07:10:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:user-agent:mime-version:to :cc:subject:references:in-reply-to:content-type :content-transfer-encoding; bh=vDgBms44Tm0VN4or2ZwINbJaCuTEMVMsJk4k9SZsav0=; b=MIfRU6lUNq066rBtu+nJ0OKiAHDuskCHEGKZq0bGbdXZbtdYAP6le5g93oc7SCcyn0 rVLcYPB6QTB8UYNoHwo9glwW8qY7IfPJEscJmOjamnDtHjMeNP420vIAUDKeOaMare9B w9Op0tOgGSD57jXDddcI7/hI/78TZJapKtq1aNZfIHxD/ukZLkm7ALvd6uxDTUwVrFny P0d+1nl2i2vvbXUXm0mQhV7FiIhaeqodEmpQgb/AdEjI4zdMQWKNQ9NeIU7Z3+QJxFtl v1NdqijIPBWNaHHNll+d26VHHV5oPTxjHccdKa6gLI8CsWksXPEQjlgh4qZfKieypMyn 1I4w== X-Gm-Message-State: ALoCoQkoI3f1j3wDGb7GRaU/pHUU+9gSV9RcojjqYQvXrmGEHMcX7wNK0/SgWYKdLGK2ICx6rrNL X-Received: by 10.205.36.70 with SMTP id sz6mr24105650bkb.12.1379340620484; Mon, 16 Sep 2013 07:10:20 -0700 (PDT) Received: from [192.168.1.26] (ip-73-126.sn2.eutelia.it. [83.211.73.126]) by mx.google.com with ESMTPSA id l5sm2404375bko.7.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 16 Sep 2013 07:10:20 -0700 (PDT) Message-ID: <5237114A.9050201@m2r.biz> Date: Mon, 16 Sep 2013 16:10:18 +0200 From: Fabio Fantoni User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: George Dunlap References: <1369813427.22605.38.camel@dagon.hellion.org.uk> <51A68060.7010500@citrix.com> In-Reply-To: Cc: Andrew Cooper , Keir Fraser , Jan Beulich , "xen-devel@lists.xen.org" Subject: Re: [Xen-devel] [PATCH] libxl: Remove qxl support for the 4.3 release X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org Il 05/07/2013 18:59, George Dunlap ha scritto: > On Wed, May 29, 2013 at 11:25 PM, Andrew Cooper > wrote: >> On 29/05/2013 08:43, Ian Campbell wrote: >>> On Tue, 2013-05-28 at 19:09 +0100, Keir Fraser wrote: >>>> On 28/05/2013 17:51, "Ian Jackson" wrote: >>>> >>>>> George Dunlap writes ("[PATCH] libxl: Remove qxl support for the 4.3 >>>>> release"): >>>>>> The qxl drivers for Windows and Linux end up calling instructions >>>>>> that cannot be used for MMIO at the moment. Just for the 4.3 release, >>>>>> remove qxl support. >>>>>> >>>>>> This patch should be reverted as soon as the 4.4 development window opens. >>>>>> >>>>>> The issue in question: >>>>>> >>>>>> (XEN) emulate.c:88:d18 bad mmio size 16 >>>>>> (XEN) io.c:201:d18 MMIO emulation failed @ 0033:7fd2de390430: f3 0f 6f >>>>>> 19 41 83 e8 403 >>>>>> >>>>>> The instruction in question is "movdqu (%rcx),%xmm3". Xen knows how >>>>>> to emulate it, but unfortunately %xmm3 is 16 bytes long, and the interface >>>>>> between Xen and qemu at the moment would appear to only allow MMIO accesses >>>>>> of 8 bytes. >>>>>> >>>>>> It's too late in the release cycle to find a fix or a workaround. >>>>> Acked-by: Ian Jackson >>>> It could be plumbed through hvmemul_do_io's multi-cycle read/write logic, >>>> and done as two 8-byte cycles to qemu. This would avoid bloating the ioreq >>>> structure that communicates to qemu. >>> Are you proposing we do this for 4.3? I'm not sure how big that change >>> would be in terms of impact (just that one instruction, any 16 byte >>> operand?). >>> >>> Of course even if we did this for 4.3 we don't know what the next issue >>> will be with QXL. >>> >>> Ian. >> Furthermore, AVX instruction emulation would require support for 32byte >> operands. I don't see the multi-cycle logic scaling sensibly. > Andrew, Keir, Jan, does any one of you fancy taking this on for 4.4? > > -George Is there someone that can add full support for SSE on hvm domUs? Thanks for any reply. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel