Re: [PATCH] KVM: X86: Allow userspace to define the microcode version

Borislav Petkov
2018-02-26T11:44:34Z

On Mon, Feb 26, 2018 at 07:37:32PM +0800, Wanpeng Li wrote:
> The guest write is ignored as the original kvm implementation before the patch.

That will never work because there's no virtualized microcode loader.
Which will be a dumb idea anyway.

Goes to show that dealing with microcode revisions for a guest is the
wrong approach.

> Hmm, the apic_check_deadline_errata() example can be referred to.

So that's basically what I'm saying - fix apic_check_deadline_errata()
to check whether the kernel runs as a guest.

--
Regards/Gruss,
Boris.

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