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| author | Gavin Shan <gshan@redhat.com> | 2020-01-21 16:56:59 +1100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-14 16:32:23 -0500 |
| commit | 4b99ae6d648416af377f5ac389619f12e555b362 (patch) | |
| tree | a059ab8cf3f13e1a54c699d4386f7ff2ab8aae18 /virt | |
| parent | 1e26078c29edb7bdf7d75ddc52d34912b805791e (diff) | |
| download | linux-rt-4b99ae6d648416af377f5ac389619f12e555b362.tar.gz | |
KVM: arm/arm64: Fix young bit from mmu notifier
commit cf2d23e0bac9f6b5cd1cba8898f5f05ead40e530 upstream.
kvm_test_age_hva() is called upon mmu_notifier_test_young(), but wrong
address range has been passed to handle_hva_to_gpa(). With the wrong
address range, no young bits will be checked in handle_hva_to_gpa().
It means zero is always returned from mmu_notifier_test_young().
This fixes the issue by passing correct address range to the underly
function handle_hva_to_gpa(), so that the hardware young (access) bit
will be visited.
Fixes: 35307b9a5f7e ("arm/arm64: KVM: Implement Stage-2 page aging")
Signed-off-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200121055659.19560-1-gshan@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/mmu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index 9f69202d8e49..3814cdad643a 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -1736,7 +1736,8 @@ int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) if (!kvm->arch.pgd) return 0; trace_kvm_test_age_hva(hva); - return handle_hva_to_gpa(kvm, hva, hva, kvm_test_age_hva_handler, NULL); + return handle_hva_to_gpa(kvm, hva, hva + PAGE_SIZE, + kvm_test_age_hva_handler, NULL); } void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu) |