KVM: x86/mmu: Skip invalid roots when zapping leaf SPTEs for GFN range

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When zapping a GFN in response to an APICv or MTRR change, don't zap SPTEs
for invalid roots as KVM only needs to ensure the guest can't use stale
mappings for the GFN.  Unlike kvm_tdp_mmu_unmap_gfn_range(), which must
zap "unreachable" SPTEs to ensure KVM doesn't mark a page accessed/dirty,
kvm_tdp_mmu_zap_leafs() isn't used (and isn't intended to be used) to
handle freeing of host memory.

Link: https://lore.kernel.org/r/20240111020048.844847-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2024-01-10 18:00:44 -08:00

parent 6577f1efdf

commit 99b85fda91

1 changed files with 4 additions and 4 deletions

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arch/x86/kvm/mmu/tdp_mmu.c

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