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usb/vmstate: add parent dev path

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... to make vmstate id string truely unique with multiple host
controllers, i.e. move from "1/usb-ptr" to "0000:00:01.3/1/usb-ptr"
(usb tabled connected to piix3 uhci).

This obviously breaks migration.  To handle this the usb bus
property "full-path" is added.  When setting this to false old
behavior is maintained.  This way current qemu will be compatible
with old versions when started using '-M pc-$oldversion'.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2011-08-22 09:09:51 +02:00
parent 158fd3ce98
commit eeb0cf9abf
3 changed files with 25 additions and 1 deletions
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5
hw/usb.h
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@ -182,12 +182,17 @@ struct USBEndpoint {
QTAILQ_HEAD(, USBPacket) queue;
};
enum USBDeviceFlags {
USB_DEV_FLAG_FULL_PATH,
};
/* definition of a USB device */
struct USBDevice {
DeviceState qdev;
USBPort *port;
char *port_path;
void *opaque;
uint32_t flags;
/* Actual connected speed */
int speed;