mirror of
https://github.com/kata-containers/kata-containers.git
synced 2025-10-21 20:08:54 +00:00
f890ffdaf7
SMT must be turned off on Power8 for KVM to work. Put this as a check for kata-runtime kata-check. Fixes: #397 Signed-off-by: Nitesh Konkar <niteshkonkar@in.ibm.com>
115 lines
2.6 KiB
Go
115 lines
2.6 KiB
Go
// Copyright (c) 2018 IBM
|
|
//
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
//
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"os/exec"
|
|
"strings"
|
|
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
const (
|
|
cpuFlagsTag = genericCPUFlagsTag
|
|
archCPUVendorField = genericCPUVendorField
|
|
archCPUModelField = genericCPUModelField
|
|
)
|
|
|
|
var (
|
|
ppc64CpuCmd = "ppc64_cpu"
|
|
smtStatusOption = "--smt"
|
|
)
|
|
|
|
// archRequiredCPUFlags maps a CPU flag value to search for and a
|
|
// human-readable description of that value.
|
|
var archRequiredCPUFlags = map[string]string{}
|
|
|
|
// archRequiredCPUAttribs maps a CPU (non-CPU flag) attribute value to search for
|
|
// and a human-readable description of that value.
|
|
var archRequiredCPUAttribs = map[string]string{}
|
|
|
|
// archRequiredKernelModules maps a required module name to a human-readable
|
|
// description of the modules functionality and an optional list of
|
|
// required module parameters.
|
|
var archRequiredKernelModules = map[string]kernelModule{
|
|
"kvm": {
|
|
desc: "Kernel-based Virtual Machine",
|
|
},
|
|
"kvm_hv": {
|
|
desc: "Kernel-based Virtual Machine hardware virtualization",
|
|
},
|
|
}
|
|
|
|
func archHostCanCreateVMContainer() error {
|
|
return kvmIsUsable()
|
|
}
|
|
|
|
// hostIsVMContainerCapable checks to see if the host is theoretically capable
|
|
// of creating a VM container.
|
|
func hostIsVMContainerCapable(details vmContainerCapableDetails) error {
|
|
|
|
_, err := getCPUInfo(details.cpuInfoFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
text, err := getFileContents(details.cpuInfoFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if strings.Contains(text, "POWER8") {
|
|
if !isSMTOff() {
|
|
return fmt.Errorf("SMT is not Off. %s", failMessage)
|
|
}
|
|
}
|
|
|
|
count, err := checkKernelModules(details.requiredKernelModules, archKernelParamHandler)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if count == 0 {
|
|
return nil
|
|
}
|
|
|
|
return fmt.Errorf("ERROR: %s", failMessage)
|
|
}
|
|
|
|
// kvmIsUsable determines if it will be possible to create a full virtual machine
|
|
// by creating a minimal VM and then deleting it.
|
|
func kvmIsUsable() error {
|
|
return genericKvmIsUsable()
|
|
}
|
|
|
|
func archKernelParamHandler(onVMM bool, fields logrus.Fields, msg string) bool {
|
|
return genericArchKernelParamHandler(onVMM, fields, msg)
|
|
}
|
|
|
|
func getCPUDetails() (vendor, model string, err error) {
|
|
return genericGetCPUDetails()
|
|
}
|
|
|
|
func isSMTOff() bool {
|
|
|
|
// Check if the SMT is available and off
|
|
|
|
cmd := exec.Command(ppc64CpuCmd, smtStatusOption)
|
|
additionalEnv := "LANG=C"
|
|
cmd.Env = append(cmd.Env, additionalEnv)
|
|
out, err := cmd.Output()
|
|
|
|
if err == nil && strings.TrimRight(string(out), "\n") == "SMT is off" {
|
|
return true
|
|
} else if err != nil {
|
|
kataLog.Warn("ppc64_cpu isn't installed, can't detect SMT")
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|