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node-feature-discovery/source/cpu/cpuid_linux_arm.go

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/*
Copyright 2020 The Kubernetes Authors.
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.
*/
package cpu
/*
#include <sys/auxv.h>
unsigned long gethwcap() {
return getauxval(AT_HWCAP);
}
unsigned long gethwcap2() {
return getauxval(AT_HWCAP2);
}
*/
import "C"
/*
all special features for arm should be defined here; canonical list:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/include/uapi/asm/hwcap.h
*/
const (
/* extension instructions */
CPU_ARM_FEATURE_SWP = 1 << iota
CPU_ARM_FEATURE_HALF
CPU_ARM_FEATURE_THUMB
CPU_ARM_FEATURE_26BIT
CPU_ARM_FEATURE_FASTMUL
CPU_ARM_FEATURE_FPA
CPU_ARM_FEATURE_VFP
CPU_ARM_FEATURE_EDSP
CPU_ARM_FEATURE_JAVA
CPU_ARM_FEATURE_IWMMXT
CPU_ARM_FEATURE_CRUNCH
CPU_ARM_FEATURE_THUMBEE
CPU_ARM_FEATURE_NEON
CPU_ARM_FEATURE_VFPv3
CPU_ARM_FEATURE_VFPv3D16
CPU_ARM_FEATURE_TLS
CPU_ARM_FEATURE_VFPv4
CPU_ARM_FEATURE_IDIVA
CPU_ARM_FEATURE_IDIVT
CPU_ARM_FEATURE_VFPD32
CPU_ARM_FEATURE_LPAE
CPU_ARM_FEATURE_EVTSTRM
)
const (
CPU_ARM_FEATURE2_AES = 1 << iota
CPU_ARM_FEATURE2_PMULL
CPU_ARM_FEATURE2_SHA1
CPU_ARM_FEATURE2_SHA2
CPU_ARM_FEATURE2_CRC32
)
var flagNames_arm = map[uint64]string{
CPU_ARM_FEATURE_SWP: "SWP",
CPU_ARM_FEATURE_HALF: "HALF",
CPU_ARM_FEATURE_THUMB: "THUMB",
CPU_ARM_FEATURE_26BIT: "26BIT",
CPU_ARM_FEATURE_FASTMUL: "FASTMUL",
CPU_ARM_FEATURE_FPA: "FPA",
CPU_ARM_FEATURE_VFP: "VFP",
CPU_ARM_FEATURE_EDSP: "EDSP",
CPU_ARM_FEATURE_JAVA: "JAVA",
CPU_ARM_FEATURE_IWMMXT: "IWMMXT",
CPU_ARM_FEATURE_CRUNCH: "CRUNCH",
CPU_ARM_FEATURE_THUMBEE: "THUMBEE",
CPU_ARM_FEATURE_NEON: "NEON",
CPU_ARM_FEATURE_VFPv3: "VFPv3",
CPU_ARM_FEATURE_VFPv3D16: "VFPv3D16",
CPU_ARM_FEATURE_TLS: "TLS",
CPU_ARM_FEATURE_VFPv4: "VFPv4",
CPU_ARM_FEATURE_IDIVA: "IDIVA",
CPU_ARM_FEATURE_IDIVT: "IDIVT",
CPU_ARM_FEATURE_VFPD32: "VFPD32",
CPU_ARM_FEATURE_LPAE: "LPAE",
CPU_ARM_FEATURE_EVTSTRM: "EVTSTRM",
}
var flag2Names_arm = map[uint64]string{
CPU_ARM_FEATURE2_AES: "AES",
CPU_ARM_FEATURE2_PMULL: "PMULL",
CPU_ARM_FEATURE2_SHA1: "SHA1",
CPU_ARM_FEATURE2_SHA2: "SHA2",
CPU_ARM_FEATURE2_CRC32: "CRC32",
}
func getCpuidFlags() []string {
r := make([]string, 0, 20)
hwcap := uint64(C.gethwcap())
hwcap2 := uint64(C.gethwcap2())
for i := uint(0); i < 64; i++ {
key := uint64(1 << i)
val, ok := flagNames_arm[key]
if hwcap&key != 0 && ok {
r = append(r, val)
}
}
for i := uint(0); i < 64; i++ {
key := uint64(1 << i)
val, ok := flag2Names_arm[key]
if hwcap2&key != 0 && ok {
r = append(r, val)
}
}
return r
}
func getCpuidAttributes() map[string]string { return nil }