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KVM guest_memfd and x86 CoCo changes for 7.3

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- Forcefully invalidate SNP VMSA pages if their backing guest_memfd page is
    zapped/invalidated, e.g. due to a PUNCH_HOLE in response to a Page-State
    Change request.
 
  - Rework the so called "prepare" and "invalidate" guest_memfd hooks to prepare
    for in-place private<=>shared conversion, and clean up a few warts along the
    way.
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Merge tag 'kvm-x86-coco-7.3' of https://github.com/kvm-x86/linux into HEAD

KVM guest_memfd and x86 CoCo changes for 7.3

 - Forcefully invalidate SNP VMSA pages if their backing guest_memfd page is
   zapped/invalidated, e.g. due to a PUNCH_HOLE in response to a Page-State
   Change request.

 - Rework the so called "prepare" and "invalidate" guest_memfd hooks to prepare
   for in-place private<=>shared conversion, and clean up a few warts along the
   way.
This commit is contained in:
Paolo Bonzini 2026-08-18 13:25:39 +02:00
commit 159ed1ae35
12 changed files with 265 additions and 173 deletions
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