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qmp: Add support for hot plugging VFIO devices on PCI(E) bridges

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This patch adds a new function to hot plug VFIO devices on PCI(E) bridges,
This change allows to hot plug N VFIO devices in Qemu PC and Q35

Signed-off-by: Julio Montes <julio.montes@intel.com>
This commit is contained in:
Julio Montes 2017-11-29 10:15:33 -06:00
parent bc030d13d1
commit e39da6ca47
1 changed files with 18 additions and 0 deletions
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18
qmp.go
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@ -704,3 +704,21 @@ func (q *QMP) ExecuteVFIODeviceAdd(ctx context.Context, devID, bdf string) error
}
return q.executeCommand(ctx, "device_add", args, nil)
}
// ExecutePCIVFIODeviceAdd adds a VFIO device to a QEMU instance using the device_add command.
// This function can be used to hot plug VFIO devices on PCI(E) bridges, unlike
// ExecuteVFIODeviceAdd this function receives the bus and the device address on its parent bus.
// bus is optional. devID is the id of the device to add.Must be valid QMP identifier. bdf is the
// PCI bus-device-function of the pci device.
func (q *QMP) ExecutePCIVFIODeviceAdd(ctx context.Context, devID, bdf, addr, bus string) error {
args := map[string]interface{}{
"id": devID,
"driver": "vfio-pci",
"host": bdf,
"addr": addr,
}
if bus != "" {
args["bus"] = bus
}
return q.executeCommand(ctx, "device_add", args, nil)
}