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https://github.com/aljazceru/kata-containers.git
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7757dceab3
The CPUinfo need to be refined in Arm architecture, because the vendor and model of CPU may refer to different meaning in Arm architecture. Besides, relevant contents extracted from /proc/cpuinfo may need to be normalized for human-readability. Fixes: #368 Signed-off-by: Penny Zheng <penny.zheng@arm.com> Signed-off-by: Wei Chen <wei.chen@arm.com>
123 lines
3.0 KiB
Go
123 lines
3.0 KiB
Go
// Copyright (c) 2018 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package main
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import (
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"fmt"
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"github.com/sirupsen/logrus"
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)
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const (
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cpuFlagsTag = "Features"
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archCPUVendorField = "CPU implementer"
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archCPUModelField = "CPU architecture"
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)
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// archRequiredCPUFlags maps a CPU flag value to search for and a
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// human-readable description of that value.
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var archRequiredCPUFlags = map[string]string{}
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// archRequiredCPUAttribs maps a CPU (non-CPU flag) attribute value to search for
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// and a human-readable description of that value.
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var archRequiredCPUAttribs = map[string]string{}
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// archRequiredKernelModules maps a required module name to a human-readable
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// description of the modules functionality and an optional list of
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// required module parameters.
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var archRequiredKernelModules = map[string]kernelModule{
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"kvm": {
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desc: "Kernel-based Virtual Machine",
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},
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"vhost": {
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desc: "Host kernel accelerator for virtio",
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},
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"vhost_net": {
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desc: "Host kernel accelerator for virtio network",
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},
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}
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// kvmIsUsable determines if it will be possible to create a full virtual machine
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// by creating a minimal VM and then deleting it.
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func kvmIsUsable() error {
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return genericKvmIsUsable()
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}
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func archHostCanCreateVMContainer() error {
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return kvmIsUsable()
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}
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// hostIsVMContainerCapable checks to see if the host is theoretically capable
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// of creating a VM container.
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func hostIsVMContainerCapable(details vmContainerCapableDetails) error {
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count, err := checkKernelModules(details.requiredKernelModules, archKernelParamHandler)
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if err != nil {
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return err
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}
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if count == 0 {
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return nil
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}
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return fmt.Errorf("ERROR: %s", failMessage)
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}
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func archKernelParamHandler(onVMM bool, fields logrus.Fields, msg string) bool {
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return genericArchKernelParamHandler(onVMM, fields, msg)
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}
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// The CPU Vendor here for Arm means the CPU core
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// IP Implementer.
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// normalizeArmVendor maps 'CPU implementer' in /proc/cpuinfo
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// to human-readable description of that value.
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func normalizeArmVendor(vendor string) string {
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switch vendor {
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case "0x41":
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vendor = "ARM Limited"
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default:
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vendor = "3rd Party Limited"
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}
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return vendor
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}
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// The CPU Model here for Arm means the Instruction set, that is
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// the variant number of Arm processor.
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// normalizeArmModel maps 'CPU architecture' in /proc/cpuinfo
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// to human-readable description of that value.
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func normalizeArmModel(model string) string {
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switch model {
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case "8":
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model = "v8"
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case "7", "7M", "?(12)", "?(13)", "?(14)", "?(15)", "?(16)", "?(17)":
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model = "v7"
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case "6", "6TEJ":
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model = "v6"
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case "5", "5T", "5TE", "5TEJ":
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model = "v5"
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case "4", "4T":
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model = "v4"
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case "3":
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model = "v3"
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default:
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model = "unknown"
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}
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return model
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}
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func getCPUDetails() (vendor, model string, err error) {
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if vendor, model, err := genericGetCPUDetails(); err == nil {
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vendor = normalizeArmVendor(vendor)
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model = normalizeArmModel(model)
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return vendor, model, err
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} else {
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return vendor, model, err
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}
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}
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