fc4b78c05c
Bumps [github.com/intel/goresctrl](https://github.com/intel/goresctrl) from 0.3.0 to 0.5.0. - [Release notes](https://github.com/intel/goresctrl/releases) - [Commits](https://github.com/intel/goresctrl/compare/v0.3.0...v0.5.0) --- updated-dependencies: - dependency-name: github.com/intel/goresctrl dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
/*
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Copyright 2021 Intel Corporation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package utils
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import (
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"encoding/binary"
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"fmt"
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"os"
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goresctrlpath "github.com/intel/goresctrl/pkg/path"
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)
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func ReadMSR(cpu ID, msr int64) (uint64, error) {
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path := goresctrlpath.Path("dev/cpu", fmt.Sprintf("%d", cpu), "msr")
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file, err := os.Open(path)
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if err != nil {
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return 0, err
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}
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defer file.Close()
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// Whence is the point of reference for offset
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// 0 = Beginning of file
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// 1 = Current position
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// 2 = End of file
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var whence int = 0
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_, err = file.Seek(msr, whence)
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if err != nil {
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return 0, err
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}
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data := make([]byte, 8)
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_, err = file.Read(data)
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if err != nil {
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return 0, err
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}
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return binary.LittleEndian.Uint64(data), nil
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}
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