KVM: SEV: Avoid WBINVD for HVA-based MMU notifications for SNP

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With SNP/guest_memfd, private/encrypted memory should not be mappable,
and MMU notifications for HVA-mapped memory will only be relevant to
unencrypted guest memory. Therefore, the rationale behind issuing a
wbinvd_on_all_cpus() in sev_guest_memory_reclaimed() should not apply
for SNP guests and can be ignored.

Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
[mdr: Add some clarifications in commit]
Signed-off-by: Michael Roth <michael.roth@amd.com>
Message-ID: <20240501085210.2213060-17-michael.roth@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Ashish Kalra 2024-05-01 03:52:06 -05:00 • committed by Paolo Bonzini

parent b2104024f4

commit ea262f8a7c

1 changed files with 7 additions and 1 deletions

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arch/x86/kvm/svm/sev.c

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