diff mbox series

[02/14] KVM: x86/mmu: Don't unnecessarily write-protect small pages in TDP MMU

Message ID 20210213005015.1651772-3-seanjc@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: x86/mmu: Dirty logging fixes and improvements | expand

Commit Message

Sean Christopherson Feb. 13, 2021, 12:50 a.m. UTC 
Respect start_level when write-protect pages in the TDP MMU for dirty
logging.  When the dirty bitmaps are initialized with all bits set, small
pages don't need to be write-protected as they've already been marked
dirty.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/mmu/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index e507568cd55d..24325bdcd387 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5500,7 +5500,7 @@  void kvm_mmu_slot_remove_write_access(struct kvm *kvm,
 	flush = slot_handle_level(kvm, memslot, slot_rmap_write_protect,
 				start_level, KVM_MAX_HUGEPAGE_LEVEL, false);
 	if (is_tdp_mmu_enabled(kvm))
-		flush |= kvm_tdp_mmu_wrprot_slot(kvm, memslot, PG_LEVEL_4K);
+		flush |= kvm_tdp_mmu_wrprot_slot(kvm, memslot, start_level);
 	write_unlock(&kvm->mmu_lock);
 
 	/*