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runtime: Add support for VFIO-AP pass-through

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Recognise when a device to be hot-plugged is an IBM Adjunct Processor
(AP) device and execute VFIO AP hot-plug accordingly. Includes unittest
for recognising and uses CCW for addDeviceToBridge in hotplugVFIODevice
if appropriate.

Fixes: #491

Signed-off-by: Jakob-Naucke <jakob.naucke@ibm.com>
Co-authored-by: Julio Montes <julio.montes@intel.com>
Reviewed-by: Alice Frosi <afrosi@redhat.com>
This commit is contained in:
Jakob-Naucke
2020-08-26 16:45:37 +02:00
parent 8df06a046e
commit 1236e22475
5 changed files with 59 additions and 11 deletions
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24
src/runtime/virtcontainers/qemu_arch_base.go
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@@ -712,30 +712,34 @@ func (q *qemuArchBase) setIgnoreSharedMemoryMigrationCaps(ctx context.Context, q
}
func (q *qemuArchBase) addDeviceToBridge(ID string, t types.Type) (string, types.Bridge, error) {
addr, b, err := genericAddDeviceToBridge(q.Bridges, ID, t)
if err != nil {
return "", b, err
}
return fmt.Sprintf("%02x", addr), b, nil
}
func genericAddDeviceToBridge(bridges []types.Bridge, ID string, t types.Type) (uint32, types.Bridge, error) {
var err error
var addr uint32
if len(q.Bridges) == 0 {
return "", types.Bridge{}, errors.New("failed to get available address from bridges")
if len(bridges) == 0 {
return 0, types.Bridge{}, errors.New("failed to get available address from bridges")
}
// looking for an empty address in the bridges
for _, b := range q.Bridges {
for _, b := range bridges {
if t != b.Type {
continue
}
addr, err = b.AddDevice(ID)
if err == nil {
switch t {
case types.CCW:
return fmt.Sprintf("%04x", addr), b, nil
case types.PCI, types.PCIE:
return fmt.Sprintf("%02x", addr), b, nil
}
return addr, b, nil
}
}
return "", types.Bridge{}, fmt.Errorf("no more bridge slots available")
return 0, types.Bridge{}, fmt.Errorf("no more bridge slots available")
}
func (q *qemuArchBase) removeDeviceFromBridge(ID string) error {