Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h
index 47897d6..b422aee 100644
--- a/tools/perf/include/bpf/bpf.h
+++ b/tools/perf/include/bpf/bpf.h
@@ -18,6 +18,35 @@
unsigned int numa_node;
};
+#define bpf_map(name, _type, type_key, type_val, _max_entries) \
+struct bpf_map SEC("maps") name = { \
+ .type = BPF_MAP_TYPE_##_type, \
+ .key_size = sizeof(type_key), \
+ .value_size = sizeof(type_val), \
+ .max_entries = _max_entries, \
+}; \
+struct ____btf_map_##name { \
+ type_key key; \
+ type_val value; \
+}; \
+struct ____btf_map_##name __attribute__((section(".maps." #name), used)) \
+ ____btf_map_##name = { }
+
+/*
+ * FIXME: this should receive .max_entries as a parameter, as careful
+ * tuning of these limits is needed to avoid hitting limits that
+ * prevents other BPF constructs, such as tracepoint handlers,
+ * to get installed, with cryptic messages from libbpf, etc.
+ * For the current need, 'perf trace --filter-pids', 64 should
+ * be good enough, but this surely needs to be revisited.
+ */
+#define pid_map(name, value_type) bpf_map(name, HASH, pid_t, value_type, 64)
+
+static int (*bpf_map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags) = (void *)BPF_FUNC_map_update_elem;
+static void *(*bpf_map_lookup_elem)(struct bpf_map *map, void *key) = (void *)BPF_FUNC_map_lookup_elem;
+
+static void (*bpf_tail_call)(void *ctx, void *map, int index) = (void *)BPF_FUNC_tail_call;
+
#define SEC(NAME) __attribute__((section(NAME), used))
#define probe(function, vars) \
@@ -26,6 +55,9 @@
#define syscall_enter(name) \
SEC("syscalls:sys_enter_" #name) syscall_enter_ ## name
+#define syscall_exit(name) \
+ SEC("syscalls:sys_exit_" #name) syscall_exit_ ## name
+
#define license(name) \
char _license[] SEC("license") = #name; \
int _version SEC("version") = LINUX_VERSION_CODE;
@@ -33,4 +65,6 @@
static int (*probe_read)(void *dst, int size, const void *unsafe_addr) = (void *)BPF_FUNC_probe_read;
static int (*probe_read_str)(void *dst, int size, const void *unsafe_addr) = (void *)BPF_FUNC_probe_read_str;
+static int (*perf_event_output)(void *, struct bpf_map *, int, void *, unsigned long) = (void *)BPF_FUNC_perf_event_output;
+
#endif /* _PERF_BPF_H */