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qemu: add support for SGX

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Define and implement memory-backend-epc object

Signed-off-by: Julio Montes <julio.montes@intel.com>
This commit is contained in:
Julio Montes 2022-01-14 13:11:03 -06:00
parent aaac742762
commit 8939b0f8e0
2 changed files with 29 additions and 0 deletions
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16
qemu/qemu.go
View File

@ -234,6 +234,9 @@ const (
// MemoryBackendFile represents a guest memory mapped file. // MemoryBackendFile represents a guest memory mapped file.
MemoryBackendFile ObjectType = "memory-backend-file" MemoryBackendFile ObjectType = "memory-backend-file"
// MemoryBackendEPC represents a guest memory backend EPC for SGX.
MemoryBackendEPC ObjectType = "memory-backend-epc"
// TDXGuest represents a TDX object // TDXGuest represents a TDX object
TDXGuest ObjectType = "tdx-guest" TDXGuest ObjectType = "tdx-guest"
@ -283,6 +286,9 @@ type Object struct {
// ReadOnly specifies whether `MemPath` is opened read-only or read/write (default) // ReadOnly specifies whether `MemPath` is opened read-only or read/write (default)
ReadOnly bool ReadOnly bool
// Prealloc enables memory preallocation
Prealloc bool
} }
// Valid returns true if the Object structure is valid and complete. // Valid returns true if the Object structure is valid and complete.
@ -290,6 +296,8 @@ func (object Object) Valid() bool {
switch object.Type { switch object.Type {
case MemoryBackendFile: case MemoryBackendFile:
return object.ID != "" && object.MemPath != "" && object.Size != 0 return object.ID != "" && object.MemPath != "" && object.Size != 0
case MemoryBackendEPC:
return object.ID != "" && object.Size != 0
case TDXGuest: case TDXGuest:
return object.ID != "" && object.File != "" && object.DeviceID != "" return object.ID != "" && object.File != "" && object.DeviceID != ""
case SEVGuest: case SEVGuest:
@ -326,6 +334,14 @@ func (object Object) QemuParams(config *Config) []string {
objectParams = append(objectParams, "readonly=on") objectParams = append(objectParams, "readonly=on")
deviceParams = append(deviceParams, "unarmed=on") deviceParams = append(deviceParams, "unarmed=on")
} }
case MemoryBackendEPC:
objectParams = append(objectParams, string(object.Type))
objectParams = append(objectParams, fmt.Sprintf("id=%s", object.ID))
objectParams = append(objectParams, fmt.Sprintf("size=%d", object.Size))
if object.Prealloc {
objectParams = append(objectParams, "prealloc=on")
}
case TDXGuest: case TDXGuest:
objectParams = append(objectParams, string(object.Type)) objectParams = append(objectParams, string(object.Type))
objectParams = append(objectParams, fmt.Sprintf("id=%s", object.ID)) objectParams = append(objectParams, fmt.Sprintf("id=%s", object.ID))

13
qemu/qemu_test.go
View File

@ -144,6 +144,19 @@ func TestAppendDeviceNVDIMM(t *testing.T) {
testAppend(object, deviceNVDIMMString, t) testAppend(object, deviceNVDIMMString, t)
} }
var objectEPCString = "-object memory-backend-epc,id=epc0,size=65536,prealloc=on"
func TestAppendEPCObject(t *testing.T) {
object := Object{
Type: MemoryBackendEPC,
ID: "epc0",
Size: 1 << 16,
Prealloc: true,
}
testAppend(object, objectEPCString, t)
}
func TestAppendDeviceFS(t *testing.T) { func TestAppendDeviceFS(t *testing.T) {
fsdev := FSDevice{ fsdev := FSDevice{
Driver: Virtio9P, Driver: Virtio9P,