kola/spawn: Support enabling swtpm

Allow users to create a qemu VM with swtpm through kola spawn. CLI options are
shared between `kola spawn` and `kola run` so add comments informing users that
the option should not be used with `kola run`.

Signed-off-by: Jeremi Piotrowski <[email protected]>

cmd/kola/options.go

@@ -227,6 +227,7 @@ func init() {
 	sv(&kola.QEMUOptions.BIOSImage, "qemu-bios", "", "BIOS to use for QEMU vm")
 	bv(&kola.QEMUOptions.UseVanillaImage, "qemu-skip-mangle", false, "don't modify CL disk image to capture console log")
 	sv(&kola.QEMUOptions.ExtraBaseDiskSize, "qemu-grow-base-disk-by", "", "grow base disk by the given size in bytes, following optional 1024-based suffixes are allowed: b (ignored), k, K, M, G, T")
+	bv(&kola.QEMUOptions.EnableTPM, "qemu-tpm", false, "enable TPM device in QEMU. Requires installing swtpm. Use only with 'kola spawn', test cases are responsible for creating a VM with TPM explicitly.")
 
 	// BrightBox specific options
 	sv(&kola.BrightboxOptions.ClientID, "brightbox-client-id", "", "Brightbox client ID")

platform/machine/qemu/cluster.go

@@ -43,6 +43,9 @@ type Cluster struct {
 func (qc *Cluster) NewMachine(userdata *conf.UserData) (platform.Machine, error) {
 	options := platform.MachineOptions{
 		ExtraPrimaryDiskSize: qc.flight.opts.ExtraBaseDiskSize,
+		// Use for 'kola spawn'; test cases should pass true through
+		// NewMachineWithOptions()
+		EnableTPM: qc.flight.opts.EnableTPM,
 	}
 	return qc.NewMachineWithOptions(userdata, options)
 }

platform/machine/qemu/flight.go

@@ -44,6 +44,8 @@ type Options struct {
 
 	ExtraBaseDiskSize string
 
+	EnableTPM bool
+
 	*platform.Options
 }