xref: /openbmc/linux/tools/perf/util/branch.h (revision 6ade6c64)
1 #ifndef _PERF_BRANCH_H
2 #define _PERF_BRANCH_H 1
3 /*
4  * The linux/stddef.h isn't need here, but is needed for __always_inline used
5  * in files included from uapi/linux/perf_event.h such as
6  * /usr/include/linux/swab.h and /usr/include/linux/byteorder/little_endian.h,
7  * detected in at least musl libc, used in Alpine Linux. -acme
8  */
9 #include <stdio.h>
10 #include <linux/perf_event.h>
11 #include <linux/types.h>
12 #include "util/map_symbol.h"
13 #include "util/sample.h"
14 
15 struct branch_flags {
16 	union {
17 		u64 value;
18 		struct {
19 			u64 mispred:1;
20 			u64 predicted:1;
21 			u64 in_tx:1;
22 			u64 abort:1;
23 			u64 cycles:16;
24 			u64 type:4;
25 			u64 spec:2;
26 			u64 new_type:4;
27 			u64 priv:3;
28 			u64 reserved:31;
29 		};
30 	};
31 };
32 
33 struct branch_info {
34 	struct addr_map_symbol from;
35 	struct addr_map_symbol to;
36 	struct branch_flags    flags;
37 	char		       *srcline_from;
38 	char		       *srcline_to;
39 };
40 
41 struct branch_entry {
42 	u64			from;
43 	u64			to;
44 	struct branch_flags	flags;
45 };
46 
47 struct branch_stack {
48 	u64			nr;
49 	u64			hw_idx;
50 	struct branch_entry	entries[];
51 };
52 
53 /*
54  * The hw_idx is only available when PERF_SAMPLE_BRANCH_HW_INDEX is applied.
55  * Otherwise, the output format of a sample with branch stack is
56  * struct branch_stack {
57  *	u64			nr;
58  *	struct branch_entry	entries[0];
59  * }
60  * Check whether the hw_idx is available,
61  * and return the corresponding pointer of entries[0].
62  */
perf_sample__branch_entries(struct perf_sample * sample)63 static inline struct branch_entry *perf_sample__branch_entries(struct perf_sample *sample)
64 {
65 	u64 *entry = (u64 *)sample->branch_stack;
66 
67 	entry++;
68 	if (sample->no_hw_idx)
69 		return (struct branch_entry *)entry;
70 	return (struct branch_entry *)(++entry);
71 }
72 
73 struct branch_type_stat {
74 	bool	branch_to;
75 	u64	counts[PERF_BR_MAX];
76 	u64	new_counts[PERF_BR_NEW_MAX];
77 	u64	cond_fwd;
78 	u64	cond_bwd;
79 	u64	cross_4k;
80 	u64	cross_2m;
81 };
82 
83 void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
84 		       u64 from, u64 to);
85 
86 const char *branch_type_name(int type);
87 const char *branch_new_type_name(int new_type);
88 const char *get_branch_type(struct branch_entry *e);
89 void branch_type_stat_display(FILE *fp, struct branch_type_stat *st);
90 int branch_type_str(struct branch_type_stat *st, char *bf, int bfsize);
91 
92 const char *branch_spec_desc(int spec);
93 
94 #endif /* _PERF_BRANCH_H */
95