Re: [PATCH v10 00/28] KVM: Enable FRED support with KVM VMX

[Sohil Mehta]

On 10/19/2026 1:46 PM, Dave Hansen wrote:
> On 9/11/26 14:36, Sohil Mehta wrote:
>> This series enables Intel flexible return and event delivery (FRED) with
>> KVM VMX to allow guests to utilize FRED.
> 
> Hey Sohil,
> 
> So, one data point: I've been using these for the past few days on a
> piece of FRED-capable hardware to do kernel shadow stack development. At
> least for my purposes, they're working great.
> 

Glad to hear that :)

> Other than sashiko, it looks like there hasn't been much activity on
> v10. What are your plans for this? 

I have been focussed on getting the LASS KVM series ready for merge.
That is ready for Sean to look at.

Now, I am planning to focus on FRED KVM for the next few weeks. I'll go
through the Sashiko comments this week and respond to them.


> Are you going to rebase and repost after the merge window closes?
> 

Yes, assuming that the Sashiko issues are minor, I'm hoping to time it
with the KVM next branch around the -rc2 timeframe.


> Is there anything else you know of holding this up?

I've listed a few opens in the cover letter but most of them are not
gating. There is *a* solution included for each open (except for the
INT1 event type issue reported by David). However, depending on the KVM
preference the code might need to be tweaked.

Overall, I think the patches need some human reviews. They have been
cache cold for a while, so I thought reviewers might need some time to
refresh.

With Plumbers done and folks in PRC back from holidays, hopefully we can
build some momentum and get this series merge ready :)