From a11106544f33c104706ae42d27219a409b67478e Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Thu, 25 Feb 2010 18:09:45 -0600 Subject: powerpc/perf: e500 support This implements perf_event support for the Freescale embedded performance monitor, based on the existing perf_event.c that supports server/classic chips. Some limitations: - Performance monitor interrupts are regular EE interrupts, and thus you can't profile places with interrupts disabled. We may want to implement soft IRQ-disabling, with perfmon interrupts exempted and treated as NMIs. - When trying to schedule multiple event groups at once, and using restricted events, situations could arise where scheduling fails even though it would be possible. Consider three groups, each with two events. One group has restricted events, the others don't. The two non-restricted groups are scheduled, then one is removed, which happens to occupy the two counters that can't do restricted events. The remaining non-restricted group will not be moved to the non-restricted-capable counters to make room if the restricted group tries to be scheduled. Signed-off-by: Scott Wood Acked-by: Paul Mackerras Signed-off-by: Kumar Gala --- arch/powerpc/platforms/Kconfig.cputype | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/powerpc/platforms') diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index fa0f690d386..a8aae0b5457 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -144,6 +144,16 @@ config FSL_EMB_PERFMON and some e300 cores (c3 and c4). Select this only if your core supports the Embedded Performance Monitor APU +config FSL_EMB_PERF_EVENT + bool + depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS + default y + +config FSL_EMB_PERF_EVENT_E500 + bool + depends on FSL_EMB_PERF_EVENT && E500 + default y + config 4xx bool depends on 40x || 44x -- cgit v1.2.3