diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-04-02 08:05:19 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-04-17 08:31:04 -0400 |
| commit | dbb6964e4c38509936719223530acb1870cd6e86 (patch) | |
| tree | 697cb3afcd09d2b28d9013a216fd301e7375d187 /arch/x86/kvm | |
| parent | a43b80b782c9f56b3bcc2e5e51261dc3980839ec (diff) | |
KVM: MMU: protect TDP MMU pages only down to required level
When using manual protection of dirty pages, it is not necessary
to protect nested page tables down to the 4K level; instead KVM
can protect only hugepages in order to split them lazily, and
delay write protection at 4K-granularity until KVM_CLEAR_DIRTY_LOG.
This was overlooked in the TDP MMU, so do it there as well.
Fixes: a6a0b05da9f37 ("kvm: x86/mmu: Support dirty logging for the TDP MMU")
Cc: Ben Gardon <bgardon@google.com>
Reviewed-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 49b860a89e85..9a369575c3a5 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5560,7 +5560,7 @@ 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); /* |