KVM: x86/mmu: Process only valid TDP MMU roots when aging a gfn range

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Skip invalid TDP MMU roots when aging a gfn range.  There is zero reason
to process invalid roots, as they by definition hold stale information.
E.g. if a root is invalid because its from a previous memslot generation,
in the unlikely event the root has a SPTE for the gfn, then odds are good
that the gfn=>hva mapping is different, i.e. doesn't map to the hva that
is being aged by the primary MMU.

Link: https://lore.kernel.org/r/20241011021051.1557902-14-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2024-10-10 19:10:45 -07:00

parent 7971801b56

commit 526e609f05

1 changed files with 4 additions and 2 deletions

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arch/x86/kvm/mmu/tdp_mmu.c

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