KVM: x86/mmu: Detect if unprotect will do anything based on invalid_list

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Explicitly query the list of to-be-zapped shadow pages when checking to
see if unprotecting a gfn for retry has succeeded, i.e. if KVM should
retry the faulting instruction.

Add a comment to explain why the list needs to be checked before zapping,
which is the primary motivation for this change.

No functional change intended.

Reviewed-by: Yuan Yao <yuan.yao@intel.com>
Link: https://lore.kernel.org/r/20240831001538.336683-22-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Sean Christopherson 2024-08-30 17:15:36 -07:00

parent 6b3dcabc10

commit d859b16161

1 changed files with 7 additions and 4 deletions

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arch/x86/kvm/mmu/mmu.c

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