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Date: Wed, 27 Jan 2016 17:14:13 +0100
From: Borislav Petkov <bp@suse.de>
To: David Vrabel <david.vrabel@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        "Luis R. Rodriguez" <mcgrof@gmail.com>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Juergen Gross <jgross@suse.com>, Jeremy Fitzhardinge <jeremy@goop.org>,
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        Roger Pau =?utf-8?B?TW9ubsOp?= <roger.pau@citrix.com>
Subject: Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest
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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)
--