From: Vipin Sharma Date: Tue, 21 Mar 2023 22:00:13 +0000 (-0700) Subject: KVM: x86/mmu: Drop access tracking checks when clearing TDP MMU dirty bits X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cf05e8c7325e341d7e1b1920fa580a130ec2c350;p=linux.git 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: Vipin Sharma [sean: split to separate patch, write changelog] Link: https://lore.kernel.org/r/20230321220021.2119033-6-seanjc@google.com Signed-off-by: Sean Christopherson --- diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index a70cc1dae18a2..950c5d23ecee0 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -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();