From 7dbfbe5b2f5fc01fb0a19a0d58820ba4ebb07884 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Tue, 6 Nov 2012 19:27:59 +0000
Subject: arm64: hyp: initialize vttbr_el2 to zero

The architecture doesn't mandate any reset value for vttbr_el2.
Better set it to a known value before some HYP code gets confused.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/head.S | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 5792749..368ad1f 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -185,6 +185,9 @@ ENTRY(el2_setup)
 	msr	hstr_el2, xzr			// Disable CP15 traps to EL2
 #endif
 
+	/* Stage-2 translation */
+	msr	vttbr_el2, xzr
+
 	/* Hypervisor stub */
 	adr	x0, __hyp_stub_vectors
 	msr	vbar_el2, x0
-- 
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