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arm64: hyp: initialize vttbr_el2 to zero
author
Marc Zyngier
<marc.zyngier@arm.com>
Tue, 6 Nov 2012 19:27:59 +0000
(19:27 +0000)
committer
Catalin Marinas
<catalin.marinas@arm.com>
Wed, 5 Dec 2012 11:26:50 +0000
(11:26 +0000)
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
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diff --git
a/arch/arm64/kernel/head.S
b/arch/arm64/kernel/head.S
index 5792749e34c4eb33103103a9aa209ef771efe29e..368ad1f7c36c3c9e0e14c09e77d5816beb2cc1af 100644
(file)
--- 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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