add stmac read mac form eeprom

hc

2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/tools/perf/util/tsc.c
..
..
@@ -1,7 +1,16 @@
1
1
 // SPDX-License-Identifier: GPL-2.0
2
+#include <errno.h>
3
+
2
4
 #include <linux/compiler.h>
5
+#include <linux/perf_event.h>
6
+#include <linux/stddef.h>
3
7
 #include <linux/types.h>
4
8
 
9
+#include <asm/barrier.h>
10
+
11
+#include "event.h"
12
+#include "synthetic-events.h"
13
+#include "debug.h"
5
14
 #include "tsc.h"
6
15
 
7
16
 u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc)
..
..
@@ -19,12 +28,84 @@
19
28
 {
20
29
 	u64 quot, rem;
21
30
 
31
+	if (tc->cap_user_time_short)
32
+		cyc = tc->time_cycles +
33
+			((cyc - tc->time_cycles) & tc->time_mask);
34
+
22
35
 	quot = cyc >> tc->time_shift;
23
36
 	rem  = cyc & (((u64)1 << tc->time_shift) - 1);
24
37
 	return tc->time_zero + quot * tc->time_mult +
25
38
 	       ((rem * tc->time_mult) >> tc->time_shift);
26
39
 }
27
40
 
41
+int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
42
+			     struct perf_tsc_conversion *tc)
43
+{
44
+	u32 seq;
45
+	int i = 0;
46
+
47
+	while (1) {
48
+		seq = pc->lock;
49
+		rmb();
50
+		tc->time_mult = pc->time_mult;
51
+		tc->time_shift = pc->time_shift;
52
+		tc->time_zero = pc->time_zero;
53
+		tc->time_cycles = pc->time_cycles;
54
+		tc->time_mask = pc->time_mask;
55
+		tc->cap_user_time_zero = pc->cap_user_time_zero;
56
+		tc->cap_user_time_short	= pc->cap_user_time_short;
57
+		rmb();
58
+		if (pc->lock == seq && !(seq & 1))
59
+			break;
60
+		if (++i > 10000) {
61
+			pr_debug("failed to get perf_event_mmap_page lock\n");
62
+			return -EINVAL;
63
+		}
64
+	}
65
+
66
+	if (!tc->cap_user_time_zero)
67
+		return -EOPNOTSUPP;
68
+
69
+	return 0;
70
+}
71
+
72
+int perf_event__synth_time_conv(const struct perf_event_mmap_page *pc,
73
+				struct perf_tool *tool,
74
+				perf_event__handler_t process,
75
+				struct machine *machine)
76
+{
77
+	union perf_event event = {
78
+		.time_conv = {
79
+			.header = {
80
+				.type = PERF_RECORD_TIME_CONV,
81
+				.size = sizeof(struct perf_record_time_conv),
82
+			},
83
+		},
84
+	};
85
+	struct perf_tsc_conversion tc;
86
+	int err;
87
+
88
+	if (!pc)
89
+		return 0;
90
+	err = perf_read_tsc_conversion(pc, &tc);
91
+	if (err == -EOPNOTSUPP)
92
+		return 0;
93
+	if (err)
94
+		return err;
95
+
96
+	pr_debug2("Synthesizing TSC conversion information\n");
97
+
98
+	event.time_conv.time_mult  = tc.time_mult;
99
+	event.time_conv.time_shift = tc.time_shift;
100
+	event.time_conv.time_zero  = tc.time_zero;
101
+	event.time_conv.time_cycles = tc.time_cycles;
102
+	event.time_conv.time_mask = tc.time_mask;
103
+	event.time_conv.cap_user_time_zero = tc.cap_user_time_zero;
104
+	event.time_conv.cap_user_time_short = tc.cap_user_time_short;
105
+
106
+	return process(tool, &event, NULL, machine);
107
+}
108
+
28
109
 u64 __weak rdtsc(void)
29
110
 {
30
111
 	return 0;