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authorMarc Zyngier <Marc.Zyngier@arm.com>2013-01-30 18:17:49 (GMT)
committerMark Rutland <mark.rutland@arm.com>2013-06-07 09:20:27 (GMT)
commit0af0b189abf73d232af782df2f999235cd2fed7f (patch)
tree69c6a762517b8db6fe6902cdac2f0ba3c16ec3d1 /arch/arm/kernel
parente4aa937ec75df0eea0bee03bffa3303ad36c986b (diff)
downloadlinux-0af0b189abf73d232af782df2f999235cd2fed7f.tar.xz
ARM: hyp: initialize CNTVOFF to zero
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>
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/hyp-stub.S2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S
index 1315c4c..dbe2110 100644
--- a/arch/arm/kernel/hyp-stub.S
+++ b/arch/arm/kernel/hyp-stub.S
@@ -153,6 +153,8 @@ THUMB( orr r7, #(1 << 30) ) @ HSCTLR.TE
mrc p15, 4, r7, c14, c1, 0 @ CNTHCTL
orr r7, r7, #3 @ PL1PCEN | PL1PCTEN
mcr p15, 4, r7, c14, c1, 0 @ CNTHCTL
+ mov r7, #0
+ mcrr p15, 4, r7, r7, c14 @ CNTVOFF
1:
#endif