From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH RFC] VT-d: honor firmware-first mode in XSA-59 workaround code Date: Thu, 22 May 2014 11:19:39 +0100 Message-ID: <537DCF3B.4000503@citrix.com> References: <537CEBD20200007800014A29@mail.emea.novell.com> <537CD574.3030701@citrix.com> <537DBFB00200007800014C79@mail.emea.novell.com> <537DC4AC.4030505@citrix.com> <537DE83A0200007800014E06@mail.emea.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1WnQ6C-0000Ve-K8 for xen-devel@lists.xenproject.org; Thu, 22 May 2014 10:19:44 +0000 In-Reply-To: <537DE83A0200007800014E06@mail.emea.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Jan Beulich Cc: Yang Z Zhang , xen-devel , Malcolm Crossley , Kevin Tian , Donald D Dugger List-Id: xen-devel@lists.xenproject.org On 22/05/14 11:06, Jan Beulich wrote: >>>> On 22.05.14 at 11:34, wrote: >> On 22/05/14 08:13, Jan Beulich wrote: >>>>>> On 21.05.14 at 18:33, wrote: >>>> The exact problem was a 2.6.32 kernel ignoring firmware-first and >>>> disabling reporting on the root ports but not endpoint devices, causing >>>> the SMM handler to fail to find the issue, and fail to clear the SMI. >>>> >>>> However, as part of the investigation, we identified that Xen was also >>>> violating firmware-first as part of XSA-59 >>> So has a problem solely with the XSA-59 workaround (i.e. without an >>> ignorant kernel) then been observed at all? >> Correct > "Correct" isn't really a meaningful answer to the question; I guess > you mean "yes". > > Jan > Sorry - I misread the question. No. We have not observed an issue from XSA-59. The version of XenServer we had the issue with didn't contain any of the XSA-59 fixes at the point that the problem was observed. ~Andrew