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Message-ID: <20160127161413.GG13189@pd.tnic>
Date: Wed, 27 Jan 2016 17:14:13 +0100
From: Borislav Petkov <bp@...e.de>
To: David Vrabel <david.vrabel@...rix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
"Luis R. Rodriguez" <mcgrof@...il.com>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Juergen Gross <jgross@...e.com>,
Jeremy Fitzhardinge <jeremy@...p.org>,
Rusty Russell <rusty@...tcorp.com.au>,
Andrew Cooper <andrew.cooper3@...rix.com>,
X86 ML <x86@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Andy Lutomirski <luto@...capital.net>,
"H. Peter Anvin" <hpa@...or.com>, xen-devel@...ts.xenproject.org,
Roger Pau Monné <roger.pau@...rix.com>
Subject: Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest
On Wed, Jan 27, 2016 at 02:50:36PM +0000, David Vrabel wrote:
> Surely the interesting comparison here is how is (early) microcode
> loading disabled in KVM guests?
It isn't - kvm simply ignores the write to the microcode application
MSRs MSR_AMD64_PATCH_LOADER and MSR_IA32_UCODE_REV, respectively.
> We should use the same mechanism for HVMlite guests.
Good idea.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
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