Avoid segfault when not using qemu vmtype

Was crashing in regression tests on other platforms

Test also for qemu, in case of new arch or somesuch

Signed-off-by: Anders F Björklund <[email protected]>

Author: afbjorklund

pkg/qemu/qemu.go

@@ -511,19 +511,22 @@ func Cmdline(ctx context.Context, cfg Config) (exe string, args []string, err er
 	}
 
 	// CPU
-	cpu := *y.CPUType[*y.Arch]
-	if runtime.GOOS == "darwin" && runtime.GOARCH == "amd64" {
-		switch {
-		case strings.HasPrefix(cpu, "host"), strings.HasPrefix(cpu, "max"):
-			if !strings.Contains(cpu, ",-pdpe1gb") {
-				logrus.Warnf("On Intel Mac, CPU type %q typically needs \",-pdpe1gb\" option (https://stackoverflow.com/a/72863744/5167443)", cpu)
+	var cpu string
+	if y.CPUType[*y.Arch] != nil {
+		cpu = *y.CPUType[*y.Arch]
+		if runtime.GOOS == "darwin" && runtime.GOARCH == "amd64" {
+			switch {
+			case strings.HasPrefix(cpu, "host"), strings.HasPrefix(cpu, "max"):
+				if !strings.Contains(cpu, ",-pdpe1gb") {
+					logrus.Warnf("On Intel Mac, CPU type %q typically needs \",-pdpe1gb\" option (https://stackoverflow.com/a/72863744/5167443)", cpu)
+				}
 			}
 		}
+		if !strings.Contains(string(features.CPUHelp), strings.Split(cpu, ",")[0]) {
+			return "", nil, fmt.Errorf("cpu %q is not supported by %s", cpu, exe)
+		}
+		args = appendArgsIfNoConflict(args, "-cpu", cpu)
 	}
-	if !strings.Contains(string(features.CPUHelp), strings.Split(cpu, ",")[0]) {
-		return "", nil, fmt.Errorf("cpu %q is not supported by %s", cpu, exe)
-	}
-	args = appendArgsIfNoConflict(args, "-cpu", cpu)
 
 	// Machine
 	switch *y.Arch {

pkg/store/instance.go

@@ -95,7 +95,9 @@ func Inspect(instName string) (*Instance, error) {
 	inst.Config = y
 	inst.Arch = *y.Arch
 	inst.VMType = *y.VMType
-	inst.CPUType = *y.CPUType[*y.Arch]
+	if y.CPUType[*y.Arch] != nil {
+		inst.CPUType = *y.CPUType[*y.Arch]
+	}
 	inst.SSHAddress = "127.0.0.1"
 	inst.SSHLocalPort = *y.SSH.LocalPort // maybe 0
 	inst.SSHConfigFile = filepath.Join(instDir, filenames.SSHConfig)