linux-kernel - Re: [Xen-devel] [PATCH] x86/amd: fix crash as Xen Dom0 on AMD Trinity systems

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Message-ID: <4FC6650C.5060604@zytor.com>
Date:	Wed, 30 May 2012 11:21:00 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Jacob Shin <jacob.shin@....com>,
	Andre Przywara <andre.przywara@....com>, jeremy@...p.org,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	Jan Beulich <JBeulich@...e.com>, mingo@...e.hu,
	tglx@...utronix.de
Subject: Re: [Xen-devel] [PATCH] x86/amd: fix crash as Xen Dom0 on AMD Trinity
 systems

On 05/30/2012 11:19 AM, Borislav Petkov wrote:
> On Wed, May 30, 2012 at 08:17:23PM +0200, Borislav Petkov wrote:
>> The other place where we use the amd_safe variants is an obscure K8,
>> revC and earlier fix for _some_ BIOSen and this hasn't bitten us yet
>> so I'm assuming people haven't run xen on such boxes yet. Does it need
>> fixing? Probably, if we really really have to.
> 
> I'm being told we're safe here. Those boxes didn't have virtualization
> support yet (SVM) so this one doesn't need fixing.
> 

This is for PV, not for HVM (VT-x/SVM).  HVM doesn't have this kind of
drain bamage.

	-hpa
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