From: Marc Zyngier <marc.zyngier@arm.com>
Date: Tue, 6 Nov 2012 19:27:59 +0000 (+0000)
Subject: arm64: hyp: initialize vttbr_el2 to zero
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7dbfbe5b2f5fc01fb0a19a0d58820ba4ebb07884;p=linux-beck.git

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>
---

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 5792749e34c4..368ad1f7c36c 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