diff options
| author | Ben Gardon <bgardon@google.com> | 2020-10-14 11:26:53 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-23 03:42:12 -0400 |
| commit | f8e144971c6834fa1e171be4cd8026f8bc537bca (patch) | |
| tree | 20146e504a64852a8f056a6bf6dd69d97e455334 /arch/x86/kvm/mmu/mmu.c | |
| parent | 063afacd8730be3d9a3d50f9ea730f840265aba0 (diff) | |
kvm: x86/mmu: Add access tracking for tdp_mmu
In order to interoperate correctly with the rest of KVM and other Linux
subsystems, the TDP MMU must correctly handle various MMU notifiers. The
main Linux MM uses the access tracking MMU notifiers for swap and other
features. Add hooks to handle the test/flush HVA (range) family of
MMU notifiers.
Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell
machine. This series introduced no new failures.
This series can be viewed in Gerrit at:
https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20201014182700.2888246-14-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 35c277ed6c78..33ec6c4c36d7 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -1558,12 +1558,24 @@ static void rmap_recycle(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn) int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end) { - return kvm_handle_hva_range(kvm, start, end, 0, kvm_age_rmapp); + int young = false; + + young = kvm_handle_hva_range(kvm, start, end, 0, kvm_age_rmapp); + if (kvm->arch.tdp_mmu_enabled) + young |= kvm_tdp_mmu_age_hva_range(kvm, start, end); + + return young; } int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) { - return kvm_handle_hva(kvm, hva, 0, kvm_test_age_rmapp); + int young = false; + + young = kvm_handle_hva(kvm, hva, 0, kvm_test_age_rmapp); + if (kvm->arch.tdp_mmu_enabled) + young |= kvm_tdp_mmu_test_age_hva(kvm, hva); + + return young; } #ifdef MMU_DEBUG |