Introduce a function, called arch_timer_stolen_ticks, called from the arch_timer interrupt handler to account for stolen ticks.
Signed-off-by: Stefano Stabellini <[email protected]> CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] --- arch/arm/include/asm/arch_timer.h | 5 +++++ drivers/clocksource/arm_arch_timer.c | 6 ++++++ 2 files changed, 11 insertions(+), 0 deletions(-) diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h index 7ade91d..30db413 100644 --- a/arch/arm/include/asm/arch_timer.h +++ b/arch/arm/include/asm/arch_timer.h @@ -13,6 +13,11 @@ int arch_timer_of_register(void); int arch_timer_sched_clock_init(void); +/* per-platform function to calculate stolen ticks (clock cycles stolen + * to the vcpu by the hypervisor). + */ +extern void (*arch_timer_stolen_ticks)(void); + /* * These register accessors are marked inline so the compiler can * nicely work out which register we want, and chuck away the rest of diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index d7ad425..d1ddf0b 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -37,6 +37,8 @@ static int arch_timer_ppi[MAX_TIMER_PPI]; static struct clock_event_device __percpu *arch_timer_evt; +void (*arch_timer_stolen_ticks)(void); + static bool arch_timer_use_virtual = true; /* @@ -52,6 +54,10 @@ static inline irqreturn_t timer_handler(const int access, ctrl |= ARCH_TIMER_CTRL_IT_MASK; arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl); evt->event_handler(evt); + + if ( arch_timer_stolen_ticks != NULL ) + arch_timer_stolen_ticks(); + return IRQ_HANDLED; } -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
