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cli: kata-check if SMT is off on POWER8 systems

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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>
This commit is contained in:
Nitesh Konkar 2018-06-25 19:40:05 +05:30
parent 62d819c907
commit f890ffdaf7
1 changed files with 37 additions and 0 deletions
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37
cli/kata-check_ppc64le.go
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@ -7,6 +7,8 @@ package main
import (
"fmt"
"os/exec"
"strings"
"github.com/sirupsen/logrus"
)
@ -17,6 +19,11 @@ const (
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{}
@ -50,6 +57,17 @@ func hostIsVMContainerCapable(details vmContainerCapableDetails) error {
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
@ -75,3 +93,22 @@ func archKernelParamHandler(onVMM bool, fields logrus.Fields, msg string) bool {
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
}