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powerpc/perf: Add macros for defining event fields & formats

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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 <cody@linux.vnet.ibm.com>
[mpe: move to powerpc, ugly but descriptive macro names]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Cody P Schafer 2014-03-14 16:00:40 +11:00 committed by Benjamin Herrenschmidt
parent 2d1b21ad7d
commit 7b43c67950
1 changed files with 19 additions and 0 deletions
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19
arch/powerpc/perf/hv-common.h
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@ -1,6 +1,7 @@
#ifndef LINUX_POWERPC_PERF_HV_COMMON_H_
#define LINUX_POWERPC_PERF_HV_COMMON_H_
#include <linux/perf_event.h>
#include <linux/types.h>
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