From 7b43c67950f0985be257f5fb7d656557e24d92d9 Mon Sep 17 00:00:00 2001 From: Cody P Schafer Date: Fri, 14 Mar 2014 16:00:40 +1100 Subject: [PATCH] powerpc/perf: Add macros for defining event fields & formats Add two macros which generate functions to extract the relevent bits from event->attr.config{,1,2}. EVENT_DEFINE_RANGE() defines an accessor for a range of bits in the event, as well as a "max" function that gives the maximum value of the field based on the bit width. EVENT_DEFINE_RANGE_FORMAT() defines the accessor & max routine and also a format attribute for use in the PMU's attr_groups. Signed-off-by: Cody P Schafer [mpe: move to powerpc, ugly but descriptive macro names] Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/perf/hv-common.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/powerpc/perf/hv-common.h b/arch/powerpc/perf/hv-common.h index 7e615bd38bca..5d79cecbd73d 100644 --- a/arch/powerpc/perf/hv-common.h +++ b/arch/powerpc/perf/hv-common.h @@ -1,6 +1,7 @@ #ifndef LINUX_POWERPC_PERF_HV_COMMON_H_ #define LINUX_POWERPC_PERF_HV_COMMON_H_ +#include #include struct hv_perf_caps { @@ -14,4 +15,22 @@ struct hv_perf_caps { unsigned long hv_perf_caps_get(struct hv_perf_caps *caps); + +#define EVENT_DEFINE_RANGE_FORMAT(name, attr_var, bit_start, bit_end) \ +PMU_FORMAT_ATTR(name, #attr_var ":" #bit_start "-" #bit_end); \ +EVENT_DEFINE_RANGE(name, attr_var, bit_start, bit_end) + +#define EVENT_DEFINE_RANGE(name, attr_var, bit_start, bit_end) \ +static u64 event_get_##name##_max(void) \ +{ \ + BUILD_BUG_ON((bit_start > bit_end) \ + || (bit_end >= (sizeof(1ull) * 8))); \ + return (((1ull << (bit_end - bit_start)) - 1) << 1) + 1; \ +} \ +static u64 event_get_##name(struct perf_event *event) \ +{ \ + return (event->attr.attr_var >> (bit_start)) & \ + event_get_##name##_max(); \ +} + #endif -- 2.20.1