diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2017-05-16 10:34:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-07 08:35:40 +0200 |
| commit | dd2342ad66659e759da0cba023fb13acb4b27406 (patch) | |
| tree | 3ac64ed56c6dbde553df447fcf00e7a1e67caf0f | |
| parent | 70df301a083c73353b2951e74f9ff6d682f72d63 (diff) | |
kvm: arm/arm64: Force reading uncached stage2 PGD
commit 2952a6070e07ebdd5896f1f5b861acad677caded upstream.
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>
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>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/arm/kvm/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c index 0c060c5e844a..2206e0e00934 100644 --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -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); |