[PATCH 0/2] Fixes for pKVM NP-guest support

[Oliver Upton]

On Fri, Feb 07, 2025 at 02:54:36PM +0000, Quentin Perret wrote:
> Hi all,
> 
> Here are two patches to deal with a race between the handling of
> permission faults and MMU notifiers with pKVM that I found by
> inspection. Specifically, pKVM gets thoroughly confused when it doesn't
> find a page mapped in its relax_perm path, while standard KVM deals
> with that trivially thanks to the -EAGAIN special case in
> user_mem_abort(). The second patch addresses the problem by simplifying
> the implementation of multiple pKVM hypercalls, which also has the nice
> side effect of improving locking by not taking the global host stage-2
> lock as much.
> 
> Patches based on 6.14-rc1, tested in qemu on on Google Pixel 6.

Looks reasonable to me, the locking improvements are certainly an added
bonus.

Reviewed-by: Oliver Upton <oliver.upton at linux.dev>

-- 
Thanks,
Oliver