Re: [PATCH v4 09/25] KVM: VMX: nVMX: Support TSC scaling and PERF_GLOBAL_CTRL with enlightened VMCS

Sean Christopherson
2022-07-28T22:35:17Z

On Fri, Jul 29, 2022, Paolo Bonzini wrote:
> On 7/29/22 00:13, Sean Christopherson wrote:
> > The only flaw in this is if KVM gets handed a CPUID model that enumerates support
> > for 2025 (or whenever the next update comes) but not 2022. Hmm, though if Microsoft
> > defines each new "version" as a full superset, then even that theoretical bug goes
> > away. I'm happy to be optimistic for once and give this a shot. I definitely like
> > that it makes it easier to see the deltas between versions.
>
> Okay, I have queued the series but I still haven't gone through all the
> comments. So this will _not_ be in the 5.21 pull request.

I assume you meant 5.20?

> The first patch also needs a bit more thought to figure out the impact on
> userspace and whether we can consider syndbg niche enough to not care.
>
> Paolo
>