Commit 2952a607 authored by Suzuki K Poulose's avatar Suzuki K Poulose Committed by Christoffer Dall

kvm: arm/arm64: Force reading uncached stage2 PGD

Make sure we don't use a cached value of the KVM stage2 PGD while
resetting the PGD.

Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: default avatarChristoffer Dall <cdall@linaro.org>
Signed-off-by: default avatarChristoffer Dall <cdall@linaro.org>
parent 9b619a8f
...@@ -837,7 +837,7 @@ void kvm_free_stage2_pgd(struct kvm *kvm) ...@@ -837,7 +837,7 @@ void kvm_free_stage2_pgd(struct kvm *kvm)
spin_lock(&kvm->mmu_lock); spin_lock(&kvm->mmu_lock);
if (kvm->arch.pgd) { if (kvm->arch.pgd) {
unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE); unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE);
pgd = kvm->arch.pgd; pgd = READ_ONCE(kvm->arch.pgd);
kvm->arch.pgd = NULL; kvm->arch.pgd = NULL;
} }
spin_unlock(&kvm->mmu_lock); spin_unlock(&kvm->mmu_lock);
......
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