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
|
// 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.
// CapabilityConfig provides a way to map cpu features to hardware caps and
// /proc/cpuinfo flags. We then provide functions to update capabilities from
// either source.
#ifndef CPU_FEATURES_INCLUDE_INTERNAL_LINUX_FEATURES_AGGREGATOR_H_
#define CPU_FEATURES_INCLUDE_INTERNAL_LINUX_FEATURES_AGGREGATOR_H_
#include <ctype.h>
#include <stdint.h>
#include "cpu_features_macros.h"
#include "internal/hwcaps.h"
#include "internal/string_view.h"
CPU_FEATURES_START_CPP_NAMESPACE
// Use the following macro to declare setter functions to be used in
// CapabilityConfig.
#define DECLARE_SETTER(FeatureType, FeatureName) \
static void set_##FeatureName(void* const features, bool value) { \
((FeatureType*)features)->FeatureName = value; \
}
// Describes the relationship between hardware caps and /proc/cpuinfo flags.
typedef struct {
const HardwareCapabilities hwcaps_mask;
const char* const proc_cpuinfo_flag;
void (*set_bit)(void* const, bool); // setter for the corresponding bit.
} CapabilityConfig;
// For every config, looks into flags_line for the presence of the
// corresponding proc_cpuinfo_flag, calls `set_bit` accordingly.
// Note: features is a pointer to the underlying Feature struct.
void CpuFeatures_SetFromFlags(const size_t configs_size,
const CapabilityConfig* configs,
const StringView flags_line,
void* const features);
// For every config, looks into hwcaps for the presence of the feature. Calls
// `set_bit` with true if the hardware capability is found.
// Note: features is a pointer to the underlying Feature struct.
void CpuFeatures_OverrideFromHwCaps(const size_t configs_size,
const CapabilityConfig* configs,
const HardwareCapabilities hwcaps,
void* const features);
CPU_FEATURES_END_CPP_NAMESPACE
#endif // CPU_FEATURES_INCLUDE_INTERNAL_LINUX_FEATURES_AGGREGATOR_H_
|
