From: cdall@linaro.org (Christoffer Dall)
To: linux-arm-kernel@lists.infradead.org
Subject: [PULL 10/13] kvm: arm/arm64: Force reading uncached stage2 PGD
Date: Thu, 18 May 2017 11:47:19 +0200 [thread overview]
Message-ID: <20170518094722.9926-11-cdall@linaro.org> (raw)
In-Reply-To: <20170518094722.9926-1-cdall@linaro.org>
From: Suzuki K Poulose <suzuki.poulose@arm.com>
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 at 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>
---
virt/kvm/arm/mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index 909a1a7..704e35f 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/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);
--
2.9.0
next prev parent reply other threads:[~2017-05-18 9:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-18 9:47 [PULL 00/13] KVM/ARM Fixes for v4.12-rc2 Christoffer Dall
2017-05-18 9:47 ` [PULL 01/13] ARM: KVM: Fix tracepoint generation after move to virt/kvm/arm/ Christoffer Dall
2017-05-18 9:47 ` [PULL 02/13] arm64: KVM: Do not use stack-protector to compile EL2 code Christoffer Dall
2017-05-18 9:47 ` [PULL 03/13] arm: KVM: Do not use stack-protector to compile HYP code Christoffer Dall
2017-05-18 9:47 ` [PULL 04/13] KVM: arm/arm64: vgic-v2: Do not use Active+Pending state for a HW interrupt Christoffer Dall
2017-05-18 9:47 ` [PULL 05/13] KVM: arm/arm64: vgic-v3: " Christoffer Dall
2017-05-18 9:47 ` [PULL 06/13] KVM: arm/arm64: vgic-v3: Use PREbits to infer the number of ICH_APxRn_EL2 registers Christoffer Dall
2017-05-18 9:47 ` [PULL 07/13] kvm: arm/arm64: Fix race in resetting stage2 PGD Christoffer Dall
2017-05-18 9:47 ` [PULL 08/13] KVM: arm: plug potential guest hardware debug leakage Christoffer Dall
2017-05-18 9:47 ` [PULL 09/13] KVM: arm: rename pm_fake handler to trap_raz_wi Christoffer Dall
2017-05-18 9:47 ` Christoffer Dall [this message]
2017-05-18 9:47 ` [PULL 11/13] kvm: arm/arm64: Fix use after free of stage2 page table Christoffer Dall
2017-05-18 9:47 ` [PULL 12/13] KVM: arm/arm64: Fix bug when registering redist iodevs Christoffer Dall
2017-05-18 9:47 ` [PULL 13/13] KVM: arm/arm64: Hold slots_lock when unregistering kvm io bus devices Christoffer Dall
2017-05-18 18:34 ` [PULL 00/13] KVM/ARM Fixes for v4.12-rc2 Radim Krčmář
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