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. Good mailing practices for 400: avoid top-posting and trim the reply.