Commit 2952a607 authored May 16, 2017 by Suzuki K Poulose Committed by Christoffer Dall May 16, 2017

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: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>

parent 9b619a8f

virt/kvm/arm/mmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -837,7 +837,7 @@ void kvm_free_stage2_pgd(struct kvm *kvm)
		spin_lock(&kvm->mmu_lock);
		if (kvm->arch.pgd) {
		unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE);
		pgd = kvm->arch.pgd;
		pgd = READ_ONCE(kvm->arch.pgd);
		kvm->arch.pgd = NULL;
		}
		spin_unlock(&kvm->mmu_lock);