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authorMarc Zyngier <marc.zyngier@arm.com>2011-01-14 15:32:36 +0000
committerMarc Zyngier <marc.zyngier@arm.com>2012-04-27 13:35:33 +0100
commit3f61c80eb7dff0fb35beb8068852d3fc902315a6 (patch)
tree33f1285e1bac944b3279993b14cbfc196abf570e /arch/arm/include/asm
parent022c03a2d650c641fa0f94dbc9d9ff77f8057678 (diff)
ARM: architected timers: Add A15 specific sched_clock implementation
Provide an A15 sched_clock implementation using the virtual counter, which is thought to be more useful than the physical one in a virtualised environment, as it can offset the time spent in another VM or the hypervisor. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/include/asm')
-rw-r--r--arch/arm/include/asm/arch_timer.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h
index 827305d77b3..dc008c696b5 100644
--- a/arch/arm/include/asm/arch_timer.h
+++ b/arch/arm/include/asm/arch_timer.h
@@ -9,11 +9,17 @@ struct arch_timer {
#ifdef CONFIG_ARM_ARCH_TIMER
int arch_timer_register(struct arch_timer *);
+int arch_timer_sched_clock_init(void);
#else
static inline int arch_timer_register(struct arch_timer *at)
{
return -ENXIO;
}
+
+static inline int arch_timer_sched_clock_init(void)
+{
+ return -ENXIO;
+}
#endif
#endif