mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2024-12-14 11:57:51 +00:00
46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
//go:build amd64
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// +build amd64
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/*
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Copyright 2021 The Kubernetes Authors.
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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 cpu
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import (
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"github.com/klauspost/cpuid/v2"
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)
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func discoverSGX() map[string]string {
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var epcSize uint64
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sgx := make(map[string]string)
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if cpuid.CPU.SGX.Available {
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for _, s := range cpuid.CPU.SGX.EPCSections {
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epcSize += s.EPCSize
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}
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}
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// Set to 'true' based a non-zero sum value of SGX EPC section sizes. The
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// kernel checks for IA32_FEATURE_CONTROL.SGX_ENABLE MSR bit but we can't
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// do that as a normal user. Typically the BIOS, when enabling SGX,
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// allocates "Processor Reserved Memory" for SGX EPC so we rely on > 0
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// size here to set "SGX = enabled".
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if epcSize > 0 {
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sgx["enabled"] = "true"
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}
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return sgx
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}
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