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ARM: hyp: initialize CNTVOFF to zero

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In order to be able to use the virtual counter in a safe way,
make sure it is initialized to zero before dropping to SVC.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Dave Martin <dave.martin@linaro.org>
This commit is contained in:
Marc Zyngier
2013-01-30 18:17:49 +00:00
committed by Mark Rutland
parent e4aa937ec7
commit 0af0b189ab
1 changed files with 2 additions and 0 deletions
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2
arch/arm/kernel/hyp-stub.S
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@@ -153,6 +153,8 @@ THUMB( orr r7, #(1 << 30) ) @ HSCTLR.TE
mrc p15, 4, r7, c14, c1, 0 @ CNTHCTL mrc p15, 4, r7, c14, c1, 0 @ CNTHCTL
orr r7, r7, #3 @ PL1PCEN | PL1PCTEN orr r7, r7, #3 @ PL1PCEN | PL1PCTEN
mcr p15, 4, r7, c14, c1, 0 @ CNTHCTL mcr p15, 4, r7, c14, c1, 0 @ CNTHCTL
mov r7, #0
mcrr p15, 4, r7, r7, c14 @ CNTVOFF
1: 1:
#endif #endif