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Merge pull request #11057 from mythi/tdx-qgs-uds

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runtime: qemu: add support to use TDX QGS via Unix Domain Sockets
This commit is contained in:
Dan Mihai 2025-04-07 07:27:48 -07:00 committed by GitHub
commit 8779abd0a1
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2 changed files with 37 additions and 5 deletions
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21
src/runtime/pkg/govmm/qemu/qemu.go
View File

@ -45,6 +45,8 @@ type Machine struct {
const (
// MachineTypeMicrovm is the QEMU microvm machine type for amd64
MachineTypeMicrovm string = "microvm"
// (fixed) Unix Domain Socket Path served by Intel TDX Quote Generation Service
qgsSocketPath string = "/var/run/tdx-qgs/qgs.socket"
)
const (
@ -316,7 +318,7 @@ type Object struct {
// Prealloc enables memory preallocation
Prealloc bool
// QgsPort defines Intel Quote Generation Service port exposed from the host
// QgsPort defines Intel TDX Quote Generation Service port configuration
QgsPort uint32
// SnpIdBlock is the 96-byte, base64-encoded blob to provide the ‘ID Block’ structure
@ -336,7 +338,7 @@ func (object Object) Valid() bool {
case MemoryBackendEPC:
return object.ID != "" && object.Size != 0
case TDXGuest:
return object.ID != "" && object.File != "" && object.DeviceID != "" && object.QgsPort != 0
return object.ID != "" && object.File != "" && object.DeviceID != ""
case SEVGuest:
fallthrough
case SNPGuest:
@ -436,8 +438,9 @@ func (object Object) QemuParams(config *Config) []string {
type SocketAddress struct {
Type string `json:"type"`
Cid string `json:"cid"`
Port string `json:"port"`
Cid string `json:"cid,omitempty"`
Port string `json:"port,omitempty"`
Path string `json:"path,omitempty"`
}
type TdxQomObject struct {
@ -472,8 +475,16 @@ func (this *TdxQomObject) String() string {
return string(b)
}
func getQgsSocketAddress(portNum uint32) SocketAddress {
if portNum == 0 {
return SocketAddress{Type: "unix", Path: qgsSocketPath}
}
return SocketAddress{Type: "vsock", Cid: fmt.Sprint(VsockHostCid), Port: fmt.Sprint(portNum)}
}
func prepareTDXObject(object Object) string {
qgsSocket := SocketAddress{"vsock", fmt.Sprint(VsockHostCid), fmt.Sprint(object.QgsPort)}
qgsSocket := getQgsSocketAddress(object.QgsPort)
tdxObject := TdxQomObject{
string(object.Type), // qom-type
object.ID, // id

21
src/runtime/pkg/govmm/qemu/qemu_test.go
View File

@ -127,6 +127,27 @@ func TestAppendDeviceNVDIMM(t *testing.T) {
testAppend(object, deviceNVDIMMString, t)
}
var (
tdxObjectVsock = `-object {"qom-type":"tdx-guest","id":"tdx","quote-generation-socket":{"type":"vsock","cid":"2","port":"4050"}}`
tdxObjectUnix = `-object {"qom-type":"tdx-guest","id":"tdx","quote-generation-socket":{"type":"unix","path":"/var/run/tdx-qgs/qgs.socket"}}`
)
func TestTdxQuoteSocket(t *testing.T) {
object := Object{
Type: TDXGuest,
ID: "tdx",
File: "unused",
DeviceID: "unused",
QgsPort: 0,
}
testAppend(object, tdxObjectUnix, t)
object.QgsPort = 4050
testAppend(object, tdxObjectVsock, t)
}
var objectEPCString = "-object memory-backend-epc,id=epc0,size=65536,prealloc=on"
func TestAppendEPCObject(t *testing.T) {