Merge tag 'kvm-x86-mmu-6.18' of https://github.com/kvm-x86/linux into HEAD

Merge tag 'kvm-x86-mmu-6.18' of https://github.com/kvm-x86/linux into HEAD

KVM x86 MMU changes for 6.18

 - Recover possible NX huge pages within the TDP MMU under read lock to
   reduce guest jitter when restoring NX huge pages.

 - Return -EAGAIN during prefault if userspace concurrently deletes/moves the
   relevant memslot to fix an issue where prefaulting could deadlock with the
   memslot update.

 - Don't retry in TDX's anti-zero-step mitigation if the target memslot is
   invalid, i.e. is being deleted or moved, to fix a deadlock scenario similar
   to the aforementioned prefaulting case.