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qemu: add support for SevGuest object

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Signed-off-by: Jim Cadden <jcadden@ibm.com>
This commit is contained in:
Sandeep Gupta 2021-05-04 08:53:16 -04:00 committed by Samuel Ortiz
parent f0e9a35308
commit a6cec2d38c
1 changed files with 41 additions and 7 deletions
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40
qemu/qemu.go
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@ -230,6 +230,9 @@ const (
// TDXGuest represents a TDX object // TDXGuest represents a TDX object
TDXGuest ObjectType = "tdx-guest" TDXGuest ObjectType = "tdx-guest"
// SEVGuest represents an SEV guest object
SEVGuest ObjectType = "sev-guest"
) )
// Object is a qemu object representation. // Object is a qemu object representation.
@ -258,6 +261,14 @@ type Object struct {
// File is the device file // File is the device file
File string File string
// CBitPos is the location of the C-bit in a guest page table entry
// This is only relevant for sev-guest objects
CBitPos uint32
// ReducedPhysBits is the reduction in the guest physical address space
// This is only relevant for sev-guest objects
ReducedPhysBits uint32
} }
// Valid returns true if the Object structure is valid and complete. // Valid returns true if the Object structure is valid and complete.
@ -272,6 +283,10 @@ func (object Object) Valid() bool {
if object.ID == "" || object.File == "" || object.DeviceID == "" { if object.ID == "" || object.File == "" || object.DeviceID == "" {
return false return false
} }
case SEVGuest:
if object.ID == "" || object.File == "" || object.CBitPos == 0 || object.ReducedPhysBits == 0 {
return false
}
default: default:
return false return false
@ -284,11 +299,9 @@ func (object Object) Valid() bool {
func (object Object) QemuParams(config *Config) []string { func (object Object) QemuParams(config *Config) []string {
var objectParams []string var objectParams []string
var deviceParams []string var deviceParams []string
var driveParams []string
var qemuParams []string var qemuParams []string
deviceParams = append(deviceParams, string(object.Driver))
deviceParams = append(deviceParams, fmt.Sprintf(",id=%s", object.DeviceID))
switch object.Type { switch object.Type {
case MemoryBackendFile: case MemoryBackendFile:
objectParams = append(objectParams, string(object.Type)) objectParams = append(objectParams, string(object.Type))
@ -296,6 +309,8 @@ func (object Object) QemuParams(config *Config) []string {
objectParams = append(objectParams, fmt.Sprintf(",mem-path=%s", object.MemPath)) objectParams = append(objectParams, fmt.Sprintf(",mem-path=%s", object.MemPath))
objectParams = append(objectParams, fmt.Sprintf(",size=%d", object.Size)) objectParams = append(objectParams, fmt.Sprintf(",size=%d", object.Size))
deviceParams = append(deviceParams, string(object.Driver))
deviceParams = append(deviceParams, fmt.Sprintf(",id=%s", object.DeviceID))
deviceParams = append(deviceParams, fmt.Sprintf(",memdev=%s", object.ID)) deviceParams = append(deviceParams, fmt.Sprintf(",memdev=%s", object.ID))
case TDXGuest: case TDXGuest:
objectParams = append(objectParams, string(object.Type)) objectParams = append(objectParams, string(object.Type))
@ -303,14 +318,33 @@ func (object Object) QemuParams(config *Config) []string {
if object.Debug { if object.Debug {
objectParams = append(objectParams, ",debug=on") objectParams = append(objectParams, ",debug=on")
} }
deviceParams = append(deviceParams, string(object.Driver))
deviceParams = append(deviceParams, fmt.Sprintf(",id=%s", object.DeviceID))
deviceParams = append(deviceParams, fmt.Sprintf(",file=%s", object.File)) deviceParams = append(deviceParams, fmt.Sprintf(",file=%s", object.File))
case SEVGuest:
objectParams = append(objectParams, string(object.Type))
objectParams = append(objectParams, fmt.Sprintf(",id=%s", object.ID))
objectParams = append(objectParams, fmt.Sprintf(",cbitpos=%d", object.CBitPos))
objectParams = append(objectParams, fmt.Sprintf(",reduced-phys-bits=%d", object.ReducedPhysBits))
driveParams = append(driveParams, "if=pflash,format=raw,readonly=on")
driveParams = append(driveParams, fmt.Sprintf(",file=%s", object.File))
} }
if len(deviceParams) > 0 {
qemuParams = append(qemuParams, "-device") qemuParams = append(qemuParams, "-device")
qemuParams = append(qemuParams, strings.Join(deviceParams, "")) qemuParams = append(qemuParams, strings.Join(deviceParams, ""))
}
if len(objectParams) > 0 {
qemuParams = append(qemuParams, "-object") qemuParams = append(qemuParams, "-object")
qemuParams = append(qemuParams, strings.Join(objectParams, "")) qemuParams = append(qemuParams, strings.Join(objectParams, ""))
}
if len(driveParams) > 0 {
qemuParams = append(qemuParams, "-drive")
qemuParams = append(qemuParams, strings.Join(driveParams, ""))
}
return qemuParams return qemuParams
} }