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Reply-To: Sean Christopherson <seanjc@google.com>
Date:   Tue, 21 Mar 2023 15:00:13 -0700
In-Reply-To: <20230321220021.2119033-1-seanjc@google.com>
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Message-ID: <20230321220021.2119033-6-seanjc@google.com>
Subject: [PATCH v4 05/13] KVM: x86/mmu: Drop access tracking checks when
 clearing TDP MMU dirty bits
From:   Sean Christopherson <seanjc@google.com>
To:     Sean Christopherson <seanjc@google.com>,
        Paolo Bonzini <pbonzini@redhat.com>
Cc:     kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
        Vipin Sharma <vipinsh@google.com>,
        David Matlack <dmatlack@google.com>,
        Ben Gardon <bgardon@google.com>
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From: Vipin Sharma <vipinsh@google.com>

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]
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/mmu/tdp_mmu.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index a70cc1dae18a..950c5d23ecee 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();
-- 
2.40.0.rc2.332.ga46443480c-goog