Merge tag 'kvm-x86-sev-6.17' of https://github.com/kvm-x86/linux into HEAD

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KVM SEV cache maintenance changes for 6.17

 - Drop a superfluous WBINVD (on all CPUs!) when destroying a VM.

 - Use WBNOINVD instead of WBINVD when possible, for SEV cache maintenance,
   e.g. to minimize collateral damage when reclaiming memory from an SEV guest.

 - When reclaiming memory from an SEV guest, only do cache flushes on CPUs that
   have ever run a vCPU for the guest, i.e. don't flush the caches for CPUs
   that can't possibly have cache lines with dirty, encrypted data.

...

This commit is contained in:

Paolo Bonzini 2025-07-28 11:41:06 -04:00

parent a10accaef4 6f38f8c574

commit beafd7ecf2

3 changed files with 84 additions and 35 deletions

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110

arch/x86/kvm/svm/sev.c

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1

arch/x86/kvm/svm/svm.h

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8

arch/x86/kvm/x86.c

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