KVM: x86/mmu: Consolidate Dirty vs. Writable clearing logic in TDP MMU

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Deduplicate the guts of the TDP MMU's clearing of dirty status by
snapshotting whether to check+clear the Dirty bit vs. the Writable bit,
which is the only difference between the two flavors of dirty tracking.

Note, kvm_ad_enabled() is just a wrapper for shadow_accessed_mask, i.e.
is constant after kvm-{intel,amd}.ko is loaded.

Link: https://lore.kernel.org/all/Yz4Qi7cn7TWTWQjj@google.com
Signed-off-by: Vipin Sharma <vipinsh@google.com>
[sean: split to separate patch, apply to dirty log, write changelog]
Link: https://lore.kernel.org/r/20230321220021.2119033-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Vipin Sharma 2023-03-21 15:00:11 -07:00 • committed by Sean Christopherson

parent 5982a53926

commit 697c89bed9

1 changed files with 9 additions and 26 deletions

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arch/x86/kvm/mmu/tdp_mmu.c

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