On Mon, Feb 26, 2018 at 01:18:07PM +0100, Paolo Bonzini wrote: > > In this context, "host-initiated" write means written by KVM userspace > > with ioctl(KVM_SET_MSR). It generally happens only on VM startup, reset > > or live migration. > > To be clear, the target of the write is still the vCPU's emulated MSR. So how am I to imagine this as a user: qemu-system-x86_64 --microcode-revision=0xdeadbeef... ? -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.