Messages in this thread | | | Subject | Re: [PATCH] KVM: X86: Allow userspace to define the microcode version | From | Paolo Bonzini <> | Date | Mon, 26 Feb 2018 12:54:52 +0100 |
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On 26/02/2018 12:44, Borislav Petkov 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.
I don't understand how one thing follows from the other. How are writes to 0x8B related to having a virtualized microcode loaded (which is a concept that actually makes no sense at all)?
> So that's basically what I'm saying - fix apic_check_deadline_errata() > to check whether the kernel runs as a guest.
It has already been fixed for a few months, and fixing it is indeed the right thing to do independent of this patch.
Paolo
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