Re: [PATCH v5 4/5] KVM: VMX: Allow direct access to MSR_IA32_SPEC_CTRL

[Jim Mattson]

On Wed, Jan 31, 2018 at 1:59 PM, David Woodhouse <dwmw2@xxxxxxxxxxxxx> wrote:
> I'm actually working on IBRS_ALL at the moment.
>
> I was tempted to *not* let the guests turn it off. Expose SPEC_CTRL but
> just make it a no-op.

Maybe we could convince Intel to add a LOCK bit to IA32_SPEC_CTRL like
the one in IA32_FEATURE_CONTROL.