runtime: Re-vendor GoVMM for VFIO-AP support

This is a re-vendor of intel/govmm, with support for hot-plugging IBM
Adjunct Processor (AP) devices over VFIO. This is necessary for
enabling AP device pass-through in Kata (see #491).

    39c372a Add support for hot-plugging IBM VFIO-AP devices
    f5bdd53 travis: disable amd64 jobs
    1af1c0d github: enable github actions
    4831c6e travis: Run coveralls after success
    cf0f05d qemu: add iommu_platform knob for qemuParams
    175ac49 typo fix

Fixes: #565

Signed-off-by: Jakob-Naucke <jakob.naucke@ibm.com>

src/runtime/vendor/github.com/intel/govmm/qemu/qemu.go

@@ -123,6 +123,9 @@ const (
 	// VfioCCW is the vfio driver with CCW transport.
 	VfioCCW DeviceDriver = "vfio-ccw"
 
+	// VfioAP is the vfio driver with AP transport.
+	VfioAP DeviceDriver = "vfio-ap"
+
 	// VHostVSockPCI is a generic Vsock vhost device with PCI transport.
 	VHostVSockPCI DeviceDriver = "vhost-vsock-pci"
 
@@ -406,6 +409,9 @@ func (fsdev FSDevice) QemuParams(config *Config) []string {
 		deviceParams = append(deviceParams, fmt.Sprintf(",romfile=%s", fsdev.ROMFile))
 	}
 	if fsdev.Transport.isVirtioCCW(config) {
+		if config.Knobs.IOMMUPlatform {
+			deviceParams = append(deviceParams, ",iommu_platform=on")
+		}
 		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", fsdev.DevNo))
 	}
 
@@ -537,6 +543,9 @@ func (cdev CharDevice) QemuParams(config *Config) []string {
 	}
 
 	if cdev.Driver == VirtioSerial && cdev.Transport.isVirtioCCW(config) {
+		if config.Knobs.IOMMUPlatform {
+			deviceParams = append(deviceParams, ",iommu_platform=on")
+		}
 		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", cdev.DevNo))
 	}
 
@@ -804,6 +813,9 @@ func (netdev NetDevice) QemuDeviceParams(config *Config) []string {
 	}
 
 	if netdev.Transport.isVirtioCCW(config) {
+		if config.Knobs.IOMMUPlatform {
+			deviceParams = append(deviceParams, ",iommu_platform=on")
+		}
 		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", netdev.DevNo))
 	}
 
@@ -937,6 +949,9 @@ func (dev SerialDevice) QemuParams(config *Config) []string {
 	}
 
 	if dev.Transport.isVirtioCCW(config) {
+		if config.Knobs.IOMMUPlatform {
+			deviceParams = append(deviceParams, ",iommu_platform=on")
+		}
 		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", dev.DevNo))
 	}
 
@@ -1528,6 +1543,9 @@ func (scsiCon SCSIController) QemuParams(config *Config) []string {
 	}
 
 	if scsiCon.Transport.isVirtioCCW(config) {
+		if config.Knobs.IOMMUPlatform {
+			devParams = append(devParams, ",iommu_platform=on")
+		}
 		devParams = append(devParams, fmt.Sprintf("devno=%s", scsiCon.DevNo))
 	}
 
@@ -1710,6 +1728,9 @@ func (vsock VSOCKDevice) QemuParams(config *Config) []string {
 	}
 
 	if vsock.Transport.isVirtioCCW(config) {
+		if config.Knobs.IOMMUPlatform {
+			deviceParams = append(deviceParams, ",iommu_platform=on")
+		}
 		deviceParams = append(deviceParams, fmt.Sprintf(",devno=%s", vsock.DevNo))
 	}
 
@@ -1780,6 +1801,9 @@ func (v RngDevice) QemuParams(config *Config) []string {
 	}
 
 	if v.Transport.isVirtioCCW(config) {
+		if config.Knobs.IOMMUPlatform {
+			deviceParams = append(deviceParams, ",iommu_platform=on")
+		}
 		deviceParams = append(deviceParams, fmt.Sprintf("devno=%s", v.DevNo))
 	}
 
@@ -2125,6 +2149,9 @@ type Knobs struct {
 
 	// Exit instead of rebooting
 	NoReboot bool
+
+	// IOMMUPlatform will enable IOMMU for supported devices
+	IOMMUPlatform bool
 }
 
 // IOThread allows IO to be performed on a separate thread.

src/runtime/vendor/github.com/intel/govmm/qemu/qmp.go

@@ -281,7 +281,7 @@ func (q *QMP) readLoop(fromVMCh chan<- []byte) {
 
 		fromVMCh <- sendLine
 	}
-	q.cfg.Logger.Infof("sanner return error: %v", scanner.Err())
+	q.cfg.Logger.Infof("scanner return error: %v", scanner.Err())
 	close(fromVMCh)
 }
 
@@ -1217,6 +1217,15 @@ func (q *QMP) ExecutePCIVFIOMediatedDeviceAdd(ctx context.Context, devID, sysfsd
 	return q.executeCommand(ctx, "device_add", args, nil)
 }
 
+// ExecuteAPVFIOMediatedDeviceAdd adds a VFIO mediated AP device to a QEMU instance using the device_add command.
+func (q *QMP) ExecuteAPVFIOMediatedDeviceAdd(ctx context.Context, sysfsdev string) error {
+	args := map[string]interface{}{
+		"driver":   VfioAP,
+		"sysfsdev": sysfsdev,
+	}
+	return q.executeCommand(ctx, "device_add", args, nil)
+}
+
 // isSocketIDSupported returns if the cpu driver supports the socket id option
 func isSocketIDSupported(driver string) bool {
 	if driver == "host-s390x-cpu" || driver == "host-powerpc64-cpu" {