cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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branch.h (2056B)

      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 <stdint.h>
     11#include <linux/compiler.h>
     12#include <linux/stddef.h>
     13#include <linux/perf_event.h>
     14#include <linux/types.h>
     15#include "event.h"
     16
     17struct branch_flags {
     18	union {
     19		u64 value;
     20		struct {
     21			u64 mispred:1;
     22			u64 predicted:1;
     23			u64 in_tx:1;
     24			u64 abort:1;
     25			u64 cycles:16;
     26			u64 type:4;
     27			u64 reserved:40;
     28		};
     29	};
     30};
     31
     32struct branch_info {
     33	struct addr_map_symbol from;
     34	struct addr_map_symbol to;
     35	struct branch_flags    flags;
     36	char		       *srcline_from;
     37	char		       *srcline_to;
     38};
     39
     40struct branch_entry {
     41	u64			from;
     42	u64			to;
     43	struct branch_flags	flags;
     44};
     45
     46struct branch_stack {
     47	u64			nr;
     48	u64			hw_idx;
     49	struct branch_entry	entries[];
     50};
     51
     52/*
     53 * The hw_idx is only available when PERF_SAMPLE_BRANCH_HW_INDEX is applied.
     54 * Otherwise, the output format of a sample with branch stack is
     55 * struct branch_stack {
     56 *	u64			nr;
     57 *	struct branch_entry	entries[0];
     58 * }
     59 * Check whether the hw_idx is available,
     60 * and return the corresponding pointer of entries[0].
     61 */
     62static inline struct branch_entry *perf_sample__branch_entries(struct perf_sample *sample)
     63{
     64	u64 *entry = (u64 *)sample->branch_stack;
     65
     66	entry++;
     67	if (sample->no_hw_idx)
     68		return (struct branch_entry *)entry;
     69	return (struct branch_entry *)(++entry);
     70}
     71
     72struct branch_type_stat {
     73	bool	branch_to;
     74	u64	counts[PERF_BR_MAX];
     75	u64	cond_fwd;
     76	u64	cond_bwd;
     77	u64	cross_4k;
     78	u64	cross_2m;
     79};
     80
     81void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
     82		       u64 from, u64 to);
     83
     84const char *branch_type_name(int type);
     85void branch_type_stat_display(FILE *fp, struct branch_type_stat *st);
     86int branch_type_str(struct branch_type_stat *st, char *bf, int bfsize);
     87
     88#endif /* _PERF_BRANCH_H */