| From cf2d23e0bac9f6b5cd1cba8898f5f05ead40e530 Mon Sep 17 00:00:00 2001 |
| From: Gavin Shan <gshan@redhat.com> |
| Date: Tue, 21 Jan 2020 16:56:59 +1100 |
| Subject: KVM: arm/arm64: Fix young bit from mmu notifier |
| |
| From: Gavin Shan <gshan@redhat.com> |
| |
| 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> |
| |
| --- |
| virt/kvm/arm/mmu.c | 3 ++- |
| 1 file changed, 2 insertions(+), 1 deletion(-) |
| |
| --- a/virt/kvm/arm/mmu.c |
| +++ b/virt/kvm/arm/mmu.c |
| @@ -2147,7 +2147,8 @@ int kvm_test_age_hva(struct kvm *kvm, un |
| 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) |
