Re: [PATCH v7 10/12] KVM/x86/lbr: lazy save the guest lbr stack

From: Peter Zijlstra
Date: Tue Jul 09 2019 - 07:39:50 EST


On Mon, Jul 08, 2019 at 08:11:41AM -0700, Andi Kleen wrote:
> > I don't understand a word of that.
> >
> > Who cares if the LBR MSRs are touched; the guest expects up-to-date
> > values when it does reads them.
>
> This is for only when the LBRs are disabled in the guest.

But your Changelog didn't clearly state that. It was an unreadable mess.