Messages in this thread | | | Date | Mon, 26 Feb 2018 12:16:30 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH] KVM: X86: Allow userspace to define the microcode version |
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On Mon, Feb 26, 2018 at 07:02:29PM +0800, Wanpeng Li wrote: > > So a guest will have *two* microcode revisions - both of which are most > > likely wrong?! > > Just one revision.
So what does "the non-sensical value which is written by the guest will not reflect to guest-visible microcode revision" even mean then?
cat /proc/cpuinfo
in the guest shows what exactly?
And what would RDMSR 0x8b show then?
> https://lkml.org/lkml/2017/12/9/29 The original discussion explain in > more details.
My argument stands: exposing microcode revisions to guests is the wrong approach. Instead, the kernel should not look at microcode revisions if it runs virtualized.
-- Regards/Gruss, Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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