diff options
| author | Sean Christopherson <seanjc@google.com> | 2021-02-13 03:50:13 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-19 11:08:35 +0300 |
| commit | b6e16ae5d99fa39f0cb3d3f4558c2cbf44af38f8 (patch) | |
| tree | c5e662dff44dfddf78b5aa0aee50c0dfc9b7faad /arch/x86/kvm/mmu/tdp_mmu.h | |
| parent | a85863c2ec55edcfd11853014b143fc02b8840a9 (diff) | |
| download | linux-b6e16ae5d99fa39f0cb3d3f4558c2cbf44af38f8.tar.xz | |
KVM: x86/mmu: Don't set dirty bits when disabling dirty logging w/ PML
Stop setting dirty bits for MMU pages when dirty logging is disabled for
a memslot, as PML is now completely disabled when there are no memslots
with dirty logging enabled.
This means that spurious PML entries will be created for memslots with
dirty logging disabled if at least one other memslot has dirty logging
enabled. However, spurious PML entries are already possible since
dirty bits are set only when a dirty logging is turned off, i.e. memslots
that are never dirty logged will have dirty bits cleared.
In the end, it's faster overall to eat a few spurious PML entries in the
window where dirty logging is being disabled across all memslots.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210213005015.1651772-13-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/tdp_mmu.h')
| -rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.h b/arch/x86/kvm/mmu/tdp_mmu.h index d31c5ed81a18..3b761c111bff 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.h +++ b/arch/x86/kvm/mmu/tdp_mmu.h @@ -33,7 +33,6 @@ void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm, struct kvm_memory_slot *slot, gfn_t gfn, unsigned long mask, bool wrprot); -bool kvm_tdp_mmu_slot_set_dirty(struct kvm *kvm, struct kvm_memory_slot *slot); void kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm, struct kvm_memory_slot *slot); |