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KVM: x86/mmu: Drop access tracking checks when clearing TDP MMU dirty bits

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Drop the unnecessary call to handle access-tracking changes when clearing
the dirty status of TDP MMU SPTEs.  Neither the Dirty bit nor the Writable
bit has any impact on the accessed state of a page, i.e. clearing only
the aforementioned bits doesn't make an accessed SPTE suddently not
accessed.

Signed-off-by: Vipin Sharma <vipinsh@google.com>
[sean: split to separate patch, write changelog]
Link: https://lore.kernel.org/r/20230321220021.2119033-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Vipin Sharma 2023-03-21 15:00:13 -07:00 committed by Sean Christopherson
parent 89c313f20c
commit cf05e8c732
1 changed files with 0 additions and 2 deletions
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arch/x86/kvm/mmu/tdp_mmu.c
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@ -1691,8 +1691,6 @@ static void clear_dirty_pt_masked(struct kvm *kvm, struct kvm_mmu_page *root,
__handle_changed_spte(kvm, iter.as_id, iter.gfn, iter.old_spte, __handle_changed_spte(kvm, iter.as_id, iter.gfn, iter.old_spte,
iter.old_spte & ~dbit, iter.level, false); iter.old_spte & ~dbit, iter.level, false);
handle_changed_spte_acc_track(iter.old_spte, iter.old_spte & ~dbit,
iter.level);
} }
rcu_read_unlock(); rcu_read_unlock();