s390x: add devno support

DevNo is used to identify the ccw device for s390x systems

Signed-off-by: Alice Frosi <afrosi@de.ibm.com>

qemu/qemu.go

@@ -249,6 +249,9 @@ type FSDevice struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // Valid returns true if the FSDevice structure is valid and complete.
@@ -275,6 +278,9 @@ func (fsdev FSDevice) QemuParams(config *Config) []string {
 	if isVirtioPCI[fsdev.Driver] {
 		deviceParams = append(deviceParams, fmt.Sprintf(",romfile=%s", fsdev.ROMFile))
 	}
+	if isVirtioCCW[fsdev.Driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", fsdev.DevNo))
+	}
 
 	fsParams = append(fsParams, string(fsdev.FSDriver))
 	fsParams = append(fsParams, fmt.Sprintf(",id=%s", fsdev.ID))
@@ -335,6 +341,9 @@ type CharDevice struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // Valid returns true if the CharDevice structure is valid and complete.
@@ -368,6 +377,10 @@ func (cdev CharDevice) QemuParams(config *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf(",romfile=%s", cdev.ROMFile))
 	}
 
+	if isVirtioCCW[cdev.Driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", cdev.DevNo))
+	}
+
 	cdevParams = append(cdevParams, string(cdev.Backend))
 	cdevParams = append(cdevParams, fmt.Sprintf(",id=%s", cdev.ID))
 	if cdev.Backend == Socket {
@@ -450,6 +463,9 @@ type NetDevice struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // Valid returns true if the NetDevice structure is valid and complete.
@@ -488,6 +504,7 @@ func (netdev NetDevice) mqParameter() string {
 		vectors := len(netdev.FDs)*2 + 2
 		p = append(p, fmt.Sprintf(",vectors=%d", vectors))
 	}
+
 	return strings.Join(p, "")
 }
 
@@ -526,6 +543,10 @@ func (netdev NetDevice) QemuDeviceParams(config *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf(",romfile=%s", netdev.ROMFile))
 	}
 
+	if isVirtioCCW[netdev.Driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", netdev.DevNo))
+	}
+
 	return deviceParams
 }
 
@@ -617,6 +638,9 @@ type SerialDevice struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // Valid returns true if the SerialDevice structure is valid and complete.
@@ -642,6 +666,10 @@ func (dev SerialDevice) QemuParams(config *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf(",romfile=%s", dev.ROMFile))
 	}
 
+	if isVirtioCCW[dev.Driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", dev.DevNo))
+	}
+
 	qemuParams = append(qemuParams, "-device")
 	qemuParams = append(qemuParams, strings.Join(deviceParams, ""))
 
@@ -694,6 +722,9 @@ type BlockDevice struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // Valid returns true if the BlockDevice structure is valid and complete.
@@ -728,6 +759,10 @@ func (blkdev BlockDevice) QemuParams(config *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf(",romfile=%s", blkdev.ROMFile))
 	}
 
+	if isVirtioCCW[blkdev.Driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", blkdev.DevNo))
+	}
+
 	blkParams = append(blkParams, fmt.Sprintf("id=%s", blkdev.ID))
 	blkParams = append(blkParams, fmt.Sprintf(",file=%s", blkdev.File))
 	blkParams = append(blkParams, fmt.Sprintf(",aio=%s", blkdev.AIO))
@@ -860,6 +895,9 @@ type VFIODevice struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // Valid returns true if the VFIODevice structure is valid and complete.
@@ -879,6 +917,10 @@ func (vfioDev VFIODevice) QemuParams(config *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf(",romfile=%s", vfioDev.ROMFile))
 	}
 
+	if isVirtioCCW[driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", vfioDev.DevNo))
+	}
+
 	qemuParams = append(qemuParams, "-device")
 	qemuParams = append(qemuParams, strings.Join(deviceParams, ""))
 
@@ -903,6 +945,9 @@ type SCSIController struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // Valid returns true if the SCSIController structure is valid and complete.
@@ -933,6 +978,10 @@ func (scsiCon SCSIController) QemuParams(config *Config) []string {
 		devParams = append(devParams, fmt.Sprintf("romfile=%s", scsiCon.ROMFile))
 	}
 
+	if isVirtioCCW[driver] {
+		devParams = append(devParams, fmt.Sprintf("devno=%s", scsiCon.DevNo))
+	}
+
 	qemuParams = append(qemuParams, "-device")
 	qemuParams = append(qemuParams, strings.Join(devParams, ","))
 
@@ -1041,6 +1090,9 @@ type VSOCKDevice struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 const (
@@ -1086,6 +1138,10 @@ func (vsock VSOCKDevice) QemuParams(config *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf(",romfile=%s", vsock.ROMFile))
 	}
 
+	if isVirtioCCW[driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", vsock.DevNo))
+	}
+
 	qemuParams = append(qemuParams, "-device")
 	qemuParams = append(qemuParams, strings.Join(deviceParams, ""))
 
@@ -1104,6 +1160,8 @@ type RngDevice struct {
 	Period uint
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // Valid returns true if the RngDevice structure is valid and complete.
@@ -1131,6 +1189,10 @@ func (v RngDevice) QemuParams(_ *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf("romfile=%s", v.ROMFile))
 	}
 
+	if isVirtioCCW[driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf("devno=%s", v.DevNo))
+	}
+
 	if v.Filename != "" {
 		objectParams = append(objectParams, "filename="+v.Filename)
 	}
@@ -1160,6 +1222,9 @@ type BalloonDevice struct {
 
 	// ROMFile specifies the ROM file being used for this device.
 	ROMFile string
+
+	// DevNo identifies the ccw devices for s390x architecture
+	DevNo string
 }
 
 // QemuParams returns the qemu parameters built out of the BalloonDevice.
@@ -1178,6 +1243,10 @@ func (b BalloonDevice) QemuParams(_ *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf("romfile=%s", b.ROMFile))
 	}
 
+	if isVirtioCCW[driver] {
+		deviceParams = append(deviceParams, fmt.Sprintf("devno=%s", b.DevNo))
+	}
+
 	if b.DeflateOnOOM {
 		deviceParams = append(deviceParams, "deflate-on-oom=on")
 	} else {

qemu/qemu_arch_base.go

@@ -61,6 +61,9 @@ var isVirtioPCI = map[DeviceDriver]bool{
 	PCIePCIBridgeDriver: true,
 }
 
+// isVirtioCCW is a dummy map to return always false on no-s390x arch
+var isVirtioCCW = map[DeviceDriver]bool{}
+
 // QemuNetdevParam converts to the QEMU -netdev parameter notation
 func (n NetDeviceType) QemuNetdevParam() string {
 	switch n {

qemu/qemus390x.go

@@ -63,6 +63,26 @@ var isVirtioPCI = map[DeviceDriver]bool{
 	PCIePCIBridgeDriver: false,
 }
 
+// isVirtioCCW returns if the device is a ccw device
+var isVirtioCCW = map[DeviceDriver]bool{
+	NVDIMM:              false,
+	Virtio9P:            true,
+	VirtioNetCCW:        true,
+	VirtioSerial:        true,
+	VirtioBlock:         true,
+	Console:             false,
+	VirtioSerialPort:    false,
+	VHostVSock:          true,
+	VirtioRng:           true,
+	VirtioBalloon:       true,
+	VhostUserSCSI:       false,
+	VhostUserBlk:        false,
+	Vfio:                true,
+	VirtioScsi:          true,
+	PCIBridgeDriver:     false,
+	PCIePCIBridgeDriver: false,
+}
+
 // QemuDeviceParam converts to the QEMU -device parameter notation
 // This function has been reimplemented for the s390x architecture to deal
 // with the VHOSTUSER case. Vhost user devices are not implemented on s390x

qemu/qmp.go

@@ -822,9 +822,13 @@ func (q *QMP) ExecuteDeviceAdd(ctx context.Context, blockdevID, devID, driver, b
 		"driver": driver,
 		"drive":  blockdevID,
 	}
-	if bus != "" {
+
+	if isVirtioCCW[DeviceDriver(driver)] {
+		args["devno"] = bus
+	} else if bus != "" {
 		args["bus"] = bus
 	}
+
 	if shared && (q.version.Major > 2 || (q.version.Major == 2 && q.version.Minor >= 10)) {
 		args["share-rw"] = "on"
 	}
@@ -870,8 +874,14 @@ func (q *QMP) ExecuteSCSIDeviceAdd(ctx context.Context, blockdevID, devID, drive
 		"id":     devID,
 		"driver": driver,
 		"drive":  blockdevID,
-		"bus":    bus,
 	}
+
+	if isVirtioCCW[DeviceDriver(driver)] {
+		args["devno"] = bus
+	} else {
+		args["bus"] = bus
+	}
+
 	if scsiID >= 0 {
 		args["scsi-id"] = scsiID
 	}
@@ -1023,13 +1033,13 @@ func (q *QMP) ExecuteNetPCIDeviceAdd(ctx context.Context, netdevID, devID, macAd
 // using the device_add command. devID is the id of the device to add.
 // Must be valid QMP identifier. netdevID is the id of nic added by previous netdev_add.
 // queues is the number of queues of a nic.
-func (q *QMP) ExecuteNetCCWDeviceAdd(ctx context.Context, netdevID, devID, macAddr, addr, bus string, queues int) error {
+func (q *QMP) ExecuteNetCCWDeviceAdd(ctx context.Context, netdevID, devID, macAddr, bus string, queues int) error {
 	args := map[string]interface{}{
 		"id":     devID,
 		"driver": VirtioNetCCW,
 		"netdev": netdevID,
 		"mac":    macAddr,
-		"addr":   addr,
+		"devno":  bus,
 	}
 
 	if queues > 0 {