ARM: hyp: initialize CNTVOFF to zero · 0af0b189ab - Gogs

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>

Marc Zyngier 12 years ago

parent

e4aa937ec7

commit

0af0b189ab

1 changed files with 2 additions and 0 deletions

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arch/arm/kernel/hyp-stub.S
							 
								View File
							
				@@ -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