Re: [PATCH v4 00/28] KVM: combined patchset for MBEC/GMET support

[David Riley]

On 4/30/26 12:27 PM, Paolo Bonzini wrote:
> On Wed, Apr 29, 2026 at 3:05 PM David Riley <d.riley@xxxxxxxxxxx> wrote:
> > I observed the following:
> > The guest now never actually boots into Windows. It gets stuck before
> > that and therefore does not even enter Windows Recovery.
> Last minute rebase screwup. The old code had:
>
>      vmcb02->control.misc_ctl = vmcb01->control.misc_ctl & SVM_MISC_ENABLE_NP;
>
> New code has:
>
>      vmcb02->control.misc_ctl = vmcb01->control.misc_ctl & SVM_MISC_ENABLE_NP;
>
> And now needs to pass down GMET as well.

Thanks for looking into it.
I changed the line to:

vmcb02->control.misc_ctl = vmcb01->control.misc_ctl & (SVM_MISC_ENABLE_NP | SVM_MISC_ENABLE_GMET);

and was able to start the Windows VM with VBS enabled.

> Paolo