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authorGavin Shan <gshan@redhat.com>2020-01-21 16:56:59 +1100
committerMarc Zyngier <maz@kernel.org>2020-01-23 10:38:15 +0000
commitcf2d23e0bac9f6b5cd1cba8898f5f05ead40e530 (patch)
treef3ebc0f9b3597cb021dbe0a71c08139ced753a87 /virt/kvm/arm
parent6645d8542ef922486b733d415d2bec3b0622c27e (diff)
downloadlinux-cf2d23e0bac9f6b5cd1cba8898f5f05ead40e530.tar.bz2
KVM: arm/arm64: Fix young bit from mmu notifier
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
Diffstat (limited to 'virt/kvm/arm')
-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 a4fa81d75e84..8a9db95d1e42 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -2144,7 +2144,8 @@ 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)