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[for,3.14.y,stable,29/32] arm64: KVM: Fix TLB invalidation by IPA/VMID

Message ID 1433256507-7856-30-git-send-email-shannon.zhao@linaro.org
State New
Headers show

Commit Message

Shannon Zhao June 2, 2015, 2:48 p.m. UTC 
From: Marc Zyngier <marc.zyngier@arm.com>

commit 55e858b75808347378e5117c3c2339f46cc03575 upstream.

It took about two years for someone to notice that the IPA passed
to TLBI IPAS2E1IS must be shifted by 12 bits. Clearly our reviewing
is not as good as it should be...

Paper bag time for me.

Reported-by: Mario Smarduch <m.smarduch@samsung.com>
Tested-by: Mario Smarduch <m.smarduch@samsung.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
 arch/arm64/kvm/hyp.S | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S
index 5dfc8331..3aaf3bc 100644
--- a/arch/arm64/kvm/hyp.S
+++ b/arch/arm64/kvm/hyp.S
@@ -629,6 +629,7 @@  ENTRY(__kvm_tlb_flush_vmid_ipa)
 	 * Instead, we invalidate Stage-2 for this IPA, and the
 	 * whole of Stage-1. Weep...
 	 */
+	lsr	x1, x1, #12
 	tlbi	ipas2e1is, x1
 	/*
 	 * We have to ensure completion of the invalidation at Stage-2,