Merge pull request #9653 from JakubLedworowski/fixes-9497-ensure-quote-generation-service-is-added-to-qemu-cmd-2

runtime: Enable connection to Quote Generation Service (QGS)

src/runtime/Makefile

@@ -179,6 +179,7 @@ QEMUVALIDHYPERVISORPATHS := [\"$(QEMUPATH)\"]
 #QEMUTDXPATH := $(QEMUBINDIR)/$(QEMUTDXCMD)
 QEMUTDXPATH := PLACEHOLDER_FOR_DISTRO_QEMU_WITH_TDX_SUPPORT
 QEMUTDXVALIDHYPERVISORPATHS := [\"$(QEMUTDXPATH)\"]
+QEMUTDXQUOTEGENERATIONSERVICESOCKETPORT := 4050
 
 QEMUSNPPATH := $(QEMUBINDIR)/$(QEMUSNPCMD)
 QEMUSNPVALIDHYPERVISORPATHS := [\"$(QEMUSNPPATH)\"]
@@ -706,6 +707,7 @@ USER_VARS += QEMUTDXCMD
 USER_VARS += QEMUSNPCMD
 USER_VARS += QEMUPATH
 USER_VARS += QEMUTDXPATH
+USER_VARS += QEMUTDXQUOTEGENERATIONSERVICESOCKETPORT
 USER_VARS += QEMUSNPPATH
 USER_VARS += QEMUVALIDHYPERVISORPATHS
 USER_VARS += QEMUTDXVALIDHYPERVISORPATHS

src/runtime/config/configuration-qemu-tdx.toml.in

@@ -17,6 +17,7 @@ kernel = "@KERNELCONFIDENTIALPATH@"
 image = "@IMAGECONFIDENTIALPATH@"
 # initrd = "@INITRDPATH@"
 machine_type = "@MACHINETYPE@"
+tdx_quote_generation_service_socket_port = @QEMUTDXQUOTEGENERATIONSERVICESOCKETPORT@
 
 # rootfs filesystem type:
 #   - ext4 (default)

src/runtime/pkg/govmm/qemu/qemu.go

@@ -15,6 +15,7 @@ package qemu
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"io"
 	"log"
@@ -44,6 +45,12 @@ const (
 	MachineTypeMicrovm string = "microvm"
 )
 
+const (
+	// Well known vsock CID for host system.
+	// https://man7.org/linux/man-pages/man7/vsock.7.html
+	VsockHostCid uint64 = 2
+)
+
 // Device is the qemu device interface.
 type Device interface {
 	Valid() bool
@@ -306,6 +313,9 @@ type Object struct {
 
 	// Prealloc enables memory preallocation
 	Prealloc bool
+
+	// QgsPort defines Intel Quote Generation Service port exposed from the host
+	QgsPort uint32
 }
 
 // Valid returns true if the Object structure is valid and complete.
@@ -316,7 +326,7 @@ func (object Object) Valid() bool {
 	case MemoryBackendEPC:
 		return object.ID != "" && object.Size != 0
 	case TDXGuest:
-		return object.ID != "" && object.File != "" && object.DeviceID != ""
+		return object.ID != "" && object.File != "" && object.DeviceID != "" && object.QgsPort != 0
 	case SEVGuest:
 		fallthrough
 	case SNPGuest:
@@ -362,11 +372,7 @@ func (object Object) QemuParams(config *Config) []string {
 		}
 
 	case TDXGuest:
-		objectParams = append(objectParams, string(object.Type))
-		objectParams = append(objectParams, fmt.Sprintf("id=%s", object.ID))
-		if object.Debug {
-			objectParams = append(objectParams, "debug=on")
-		}
+		objectParams = append(objectParams, prepareObjectWithTdxQgs(object))
 		config.Bios = object.File
 	case SEVGuest:
 		fallthrough
@@ -408,6 +414,52 @@ func (object Object) QemuParams(config *Config) []string {
 	return qemuParams
 }
 
+type SocketAddress struct {
+	Type string `json:"type"`
+	Cid  string `json:"cid"`
+	Port string `json:"port"`
+}
+
+type TdxQomObject struct {
+	QomType               string        `json:"qom-type"`
+	Id                    string        `json:"id"`
+	QuoteGenerationSocket SocketAddress `json:"quote-generation-socket"`
+	Debug                 *bool         `json:"debug,omitempty"`
+}
+
+func (this *SocketAddress) String() string {
+	b, err := json.Marshal(*this)
+
+	if err != nil {
+		log.Fatalf("Unable to marshal SocketAddress object: %s", err.Error())
+		return ""
+	}
+
+	return string(b)
+}
+
+func (this *TdxQomObject) String() string {
+	b, err := json.Marshal(*this)
+
+	if err != nil {
+		log.Fatalf("Unable to marshal TDX QOM object: %s", err.Error())
+		return ""
+	}
+
+	return string(b)
+}
+
+func prepareObjectWithTdxQgs(object Object) string {
+	qgsSocket := SocketAddress{"vsock", fmt.Sprint(VsockHostCid), fmt.Sprint(object.QgsPort)}
+	tdxObject := TdxQomObject{string(object.Type), object.ID, qgsSocket, nil}
+
+	if object.Debug {
+		*tdxObject.Debug = true
+	}
+
+	return tdxObject.String()
+}
+
 // Virtio9PMultidev filesystem behaviour to deal
 // with multiple devices being shared with a 9p export.
 type Virtio9PMultidev string

src/runtime/pkg/katautils/config-settings.go.in

@@ -58,6 +58,7 @@ var systemdUnitName = "kata-containers.target"
 
 const defaultKernelParams = ""
 const defaultMachineType = "q35"
+const defaultQgsPort = 4050
 
 const defaultVCPUCount uint32 = 1
 const defaultMaxVCPUCount uint32 = 0

src/runtime/pkg/katautils/config.go

@@ -89,6 +89,7 @@ type hypervisor struct {
 	CPUFeatures                    string                    `toml:"cpu_features"`
 	KernelParams                   string                    `toml:"kernel_params"`
 	MachineType                    string                    `toml:"machine_type"`
+	QgsPort                        uint32                    `toml:"tdx_quote_generation_service_socket_port"`
 	BlockDeviceDriver              string                    `toml:"block_device_driver"`
 	EntropySource                  string                    `toml:"entropy_source"`
 	SharedFS                       string                    `toml:"shared_fs"`
@@ -373,6 +374,14 @@ func (h hypervisor) machineType() string {
 	return h.MachineType
 }
 
+func (h hypervisor) qgsPort() uint32 {
+	if h.QgsPort == 0 {
+		return defaultQgsPort
+	}
+
+	return h.QgsPort
+}
+
 func (h hypervisor) GetEntropySource() string {
 	if h.EntropySource == "" {
 		return defaultEntropySource
@@ -890,6 +899,7 @@ func newQemuHypervisorConfig(h hypervisor) (vc.HypervisorConfig, error) {
 		CPUFeatures:             cpuFeatures,
 		KernelParams:            vc.DeserializeParams(vc.KernelParamFields(kernelParams)),
 		HypervisorMachineType:   machineType,
+		QgsPort:                 h.qgsPort(),
 		NumVCPUsF:               h.defaultVCPUs(),
 		DefaultMaxVCPUs:         h.defaultMaxVCPUs(),
 		MemorySize:              h.defaultMemSz(),

src/runtime/pkg/katautils/config_test.go

@@ -182,6 +182,7 @@ func createAllRuntimeConfigFiles(dir, hypervisor string) (testConfig testRuntime
 		VirtioFSCache:         defaultVirtioFSCacheMode,
 		PFlash:                []string{},
 		SGXEPCSize:            epcSize,
+		QgsPort:               defaultQgsPort,
 	}
 
 	if goruntime.GOARCH == "arm64" && len(hypervisorConfig.PFlash) == 0 && hypervisorConfig.FirmwarePath == "" {

src/runtime/virtcontainers/hypervisor.go

@@ -671,6 +671,9 @@ type HypervisorConfig struct {
 
 	// ExtraMonitorSocket allows to add an extra HMP or QMP socket when the VMM is Qemu
 	ExtraMonitorSocket govmmQemu.MonitorProtocol
+
+	// QgsPort defines Intel Quote Generation Service port exposed from the host
+	QgsPort uint32
 }
 
 // vcpu mapping from vcpu number to thread number

src/runtime/virtcontainers/qemu_amd64.go

@@ -31,6 +31,8 @@ type qemuAmd64 struct {
 	devLoadersCount uint32
 
 	sgxEPCSize int64
+
+	qgsPort uint32
 }
 
 const (
@@ -125,6 +127,7 @@ func newQemuArch(config HypervisorConfig) (qemuArch, error) {
 		},
 		vmFactory: factory,
 		snpGuest:  config.SevSnpGuest,
+		qgsPort:   config.QgsPort,
 	}
 
 	if config.ConfidentialGuest {
@@ -282,6 +285,7 @@ func (q *qemuAmd64) appendProtectionDevice(devices []govmmQemu.Device, firmware,
 			govmmQemu.Object{
 				Driver:         govmmQemu.Loader,
 				Type:           govmmQemu.TDXGuest,
+				QgsPort:        q.qgsPort,
 				ID:             "tdx",
 				DeviceID:       fmt.Sprintf("fd%d", id),
 				Debug:          false,