From d08e2e09042bd3f7ef66a35cb4bb92794ab26bb2 Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Wed, 13 Feb 2013 16:20:44 +0000 Subject: ARM: bL_switcher: Add query interface to discover CPU affinities When the switcher is active, there is no straightforward way to figure out which logical CPU a given physical CPU maps to. This patch provides a function bL_switcher_get_logical_index(mpidr), which is analogous to get_logical_index(). This function returns the logical CPU on which the specified physical CPU is grouped (or -EINVAL if unknown). If the switcher is inactive or not present, -EUNATCH is returned instead. Signed-off-by: Dave Martin Signed-off-by: Nicolas Pitre --- arch/arm/include/asm/bL_switcher.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/include/asm/bL_switcher.h') diff --git a/arch/arm/include/asm/bL_switcher.h b/arch/arm/include/asm/bL_switcher.h index 8ada5a885c70..1714800fa113 100644 --- a/arch/arm/include/asm/bL_switcher.h +++ b/arch/arm/include/asm/bL_switcher.h @@ -55,6 +55,7 @@ bool bL_switcher_get_enabled(void); void bL_switcher_put_enabled(void); int bL_switcher_trace_trigger(void); +int bL_switcher_get_logical_index(u32 mpidr); #else static inline int bL_switcher_register_notifier(struct notifier_block *nb) @@ -70,6 +71,7 @@ static inline int bL_switcher_unregister_notifier(struct notifier_block *nb) static inline bool bL_switcher_get_enabled(void) { return false; } static inline void bL_switcher_put_enabled(void) { } static inline int bL_switcher_trace_trigger(void) { return 0; } +static inline int bL_switcher_get_logical_index(u32 mpidr) { return -EUNATCH; } #endif /* CONFIG_BL_SWITCHER */ #endif -- cgit v1.2.3