perf_mem_data_src is an union that is initialized via the ->val field
and accessed via the bitmap fields. For this to work on big endian
platforms, we also need a big-endian represenation of perf_mem_data_src.
Cc: Stephane Eranian <eran...@google.com>
Cc: Michael Ellerman <mich...@ellerman.id.au>
Signed-off-by: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com>
---
Changelog [v6]
- [Michael Ellerman] Use __BIG_ENDIAN_BITFIELD to simplify the
endian check.
Changelog [v5]:
- perf_event.h includes <byteorder.h> which pulls in the local
byteorder.h when building the perf tool. This local byteorder.h
leaves __LITTLE_ENDIAN and __BIG_ENDIAN undefined.
Include <endian.h> explicitly in the local byteorder.h.
Changelog [v2]:
- [Vince Weaver, Michael Ellerman] No __KERNEL__ in uapi headers.
include/uapi/linux/perf_event.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index ca1d90b..383052b7 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -695,6 +695,7 @@ enum perf_callchain_context {
#define PERF_FLAG_FD_OUTPUT (1U << 1)
#define PERF_FLAG_PID_CGROUP (1U << 2) /* pid=cgroup id, per-cpu
mode only */
+#if defined(__LITTLE_ENDIAN_BITFIELD)
union perf_mem_data_src {
__u64 val;
struct {
@@ -706,6 +707,21 @@ union perf_mem_data_src {
mem_rsvd:31;
};
};
+#elif defined(__BIG_ENDIAN_BITFIELD)
+union perf_mem_data_src {
+ __u64 val;
+ struct {
+ __u64 mem_rsvd:31,
+ mem_dtlb:7, /* tlb access */
+ mem_lock:2, /* lock instr */
+ mem_snoop:5, /* snoop mode */
+ mem_lvl:14, /* memory hierarchy level */
+ mem_op:5; /* type of opcode */
+ };
+};
+#else
+#error "Unknown endianness"
+#endif
/* type of opcode (load/store/prefetch,code) */
#define PERF_MEM_OP_NA 0x01 /* not available */
--
1.7.9.5
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