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>
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h
index 827305d..dc008c6 100644
--- a/arch/arm/include/asm/arch_timer.h
+++ b/arch/arm/include/asm/arch_timer.h
@@ -9,11 +9,17 @@
#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