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authorGavin Shan <gshan@redhat.com>2020-01-21 08:56:59 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-02-15 00:32:23 +0300
commit4b99ae6d648416af377f5ac389619f12e555b362 (patch)
treea059ab8cf3f13e1a54c699d4386f7ff2ab8aae18 /virt
parent1e26078c29edb7bdf7d75ddc52d34912b805791e (diff)
downloadlinux-4b99ae6d648416af377f5ac389619f12e555b362.tar.xz
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.c3
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)