linux-kernel - [PATCH 3.16.y-ckt 068/129] arm64: KVM: Fix TLB invalidation by IPA/VMID

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Message-Id: <1432285114-9254-69-git-send-email-luis.henriques@canonical.com>
Date:	Fri, 22 May 2015 09:57:33 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Marc Zyngier <marc.zyngier@....com>,
	Christoffer Dall <christoffer.dall@...aro.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Shannon Zhao <shannon.zhao@...aro.org>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 068/129] arm64: KVM: Fix TLB invalidation by IPA/VMID

3.16.7-ckt12 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Marc Zyngier <marc.zyngier@....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@...sung.com>
Tested-by: Mario Smarduch <m.smarduch@...sung.com>
Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Christoffer Dall <christoffer.dall@...aro.org>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Shannon Zhao <shannon.zhao@...aro.org>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 arch/arm64/kvm/hyp.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S
index 5dfc8331c385..3aaf3bc4ad8a 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,
--
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