Commit cf05e8c7 authored by Vipin Sharma's avatar Vipin Sharma Committed by Sean Christopherson
Browse files

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



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: default avatarVipin 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: default avatarSean Christopherson <seanjc@google.com>
parent 89c313f2

arch/x86/kvm/mmu/tdp_mmu.c

+0 −2
Original line number Diff line number Diff line
@@ -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,

				      iter.old_spte & ~dbit, iter.level, false);

		handle_changed_spte_acc_track(iter.old_spte, iter.old_spte & ~dbit,

					      iter.level);

	}



	rcu_read_unlock();