1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
// Copyright 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cpuinfo_aarch64.h"
#include "internal/filesystem.h"
#include "internal/hwcaps.h"
#include "internal/stack_line_reader.h"
#include "internal/string_view.h"
#include "internal/unix_features_aggregator.h"
#include <ctype.h>
DECLARE_SETTER(Aarch64Features, fp)
DECLARE_SETTER(Aarch64Features, asimd)
DECLARE_SETTER(Aarch64Features, aes)
DECLARE_SETTER(Aarch64Features, pmull)
DECLARE_SETTER(Aarch64Features, sha1)
DECLARE_SETTER(Aarch64Features, sha2)
DECLARE_SETTER(Aarch64Features, crc32)
static const CapabilityConfig kConfigs[] = {
{{AARCH64_HWCAP_FP, 0}, "fp", &set_fp}, //
{{AARCH64_HWCAP_ASIMD, 0}, "asimd", &set_asimd}, //
{{AARCH64_HWCAP_AES, 0}, "aes", &set_aes}, //
{{AARCH64_HWCAP_PMULL, 0}, "pmull", &set_pmull}, //
{{AARCH64_HWCAP_SHA1, 0}, "sha1", &set_sha1}, //
{{AARCH64_HWCAP_SHA2, 0}, "sha2", &set_sha2}, //
{{AARCH64_HWCAP_CRC32, 0}, "crc32", &set_crc32}, //
};
static const size_t kConfigsSize = sizeof(kConfigs) / sizeof(CapabilityConfig);
static bool HandleAarch64Line(const LineResult result,
Aarch64Info* const info) {
StringView line = result.line;
StringView key, value;
if (CpuFeatures_StringView_GetAttributeKeyValue(line, &key, &value)) {
if (CpuFeatures_StringView_IsEquals(key, str("Features"))) {
CpuFeatures_SetFromFlags(kConfigsSize, kConfigs, value, &info->features);
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU implementer"))) {
info->implementer = CpuFeatures_StringView_ParsePositiveNumber(value);
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU variant"))) {
info->variant = CpuFeatures_StringView_ParsePositiveNumber(value);
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU part"))) {
info->part = CpuFeatures_StringView_ParsePositiveNumber(value);
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU revision"))) {
info->revision = CpuFeatures_StringView_ParsePositiveNumber(value);
}
}
return !result.eof;
}
static void FillProcCpuInfoData(Aarch64Info* const info) {
const int fd = CpuFeatures_OpenFile("/proc/cpuinfo");
if (fd >= 0) {
StackLineReader reader;
StackLineReader_Initialize(&reader, fd);
for (;;) {
if (!HandleAarch64Line(StackLineReader_NextLine(&reader), info)) {
break;
}
}
CpuFeatures_CloseFile(fd);
}
}
static const Aarch64Info kEmptyAarch64Info;
Aarch64Info GetAarch64Info(void) {
// capabilities are fetched from both getauxval and /proc/cpuinfo so we can
// have some information if the executable is sandboxed (aka no access to
// /proc/cpuinfo).
Aarch64Info info = kEmptyAarch64Info;
FillProcCpuInfoData(&info);
CpuFeatures_OverrideFromHwCaps(kConfigsSize, kConfigs,
CpuFeatures_GetHardwareCapabilities(),
&info.features);
return info;
}
////////////////////////////////////////////////////////////////////////////////
// Introspection functions
int GetAarch64FeaturesEnumValue(const Aarch64Features* features,
Aarch64FeaturesEnum value) {
switch (value) {
case AARCH64_FP:
return features->fp;
case AARCH64_ASIMD:
return features->asimd;
case AARCH64_AES:
return features->aes;
case AARCH64_PMULL:
return features->pmull;
case AARCH64_SHA1:
return features->sha1;
case AARCH64_SHA2:
return features->sha2;
case AARCH64_CRC32:
return features->crc32;
case AARCH64_LAST_:
break;
}
return false;
}
const char* GetAarch64FeaturesEnumName(Aarch64FeaturesEnum value) {
switch (value) {
case AARCH64_FP:
return "fp";
case AARCH64_ASIMD:
return "asimd";
case AARCH64_AES:
return "aes";
case AARCH64_PMULL:
return "pmull";
case AARCH64_SHA1:
return "sha1";
case AARCH64_SHA2:
return "sha2";
case AARCH64_CRC32:
return "crc32";
case AARCH64_LAST_:
break;
}
return "unknown feature";
}
|
