From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [PATCH] misc/xenmicrocode: Upload /lib/firmware/ to the hypervisor Date: Wed, 28 Jan 2015 00:17:31 +0100 Message-ID: <20150127231731.GC3163@pd.tnic> References: <1422389461-19333-1-git-send-email-mcgrof@do-not-panic.com> <54C81078.3070404@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1YGFOM-0002dM-SU for xen-devel@lists.xenproject.org; Tue, 27 Jan 2015 23:17:54 +0000 Content-Disposition: inline In-Reply-To: <54C81078.3070404@citrix.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: Andrew Cooper Cc: Juergen Gross , Michal Marek , Jason Douglas , stefano.stabellini@eu.citrix.com, Takashi Iwai , mcgrof@suse.com, "Luis R. Rodriguez" , Henrique de Moraes Holschuh , david.vrabel@citrix.com, Jan Beulich , xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com, Olaf Hering List-Id: xen-devel@lists.xenproject.org On Tue, Jan 27, 2015 at 10:26:00PM +0000, Andrew Cooper wrote: > I am not convinced of the safely of permitting microcode updates at > runtime. We have seen in the past that having mismatched microcode on > different halfs of an AMD cluster causes system crashes when non-root What kind of CPU mix are we talking about here? And how is microcode on those machines supposed to be updated, regardless of OS, i.e. how does the platform vendor do those updates? -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. --