Re: [libvirt] More then one pci device possible with libvirt and pci passthrough?
Hi Mirko,
On Sun, 2009-06-28 at 17:46 +0200, Mirko Raasch wrote:
Hi,
i want to use more then one pci card in my debian guest.
But when i start the guest, the log says:
libvirtd: 15:44:55.459: warning : pciTrySecondaryBusReset:483 : Other
devices on bus with 0000:05:01.0, not doing bus reset
With "/usr/bin/qemu-system-x86_64 -m 512 -name test -hda
/media/vm/test.img -boot c -vnc :2 -k de -pcidevice host=05:01.0
-pcidevice host=05:02.0 -pcidevice host=05:03.0" there seems to be no
problems.
I'm afraid this is purely a limitation with the current code in qemu:
/* For now, we just refuse to do a secondary bus reset
* if there are other devices/functions behind the bus.
* In future, we could allow it so long as those devices
* are not in use by the host or other guests.
*/
if (pciBusContainsOtherDevices(conn, dev)) {
VIR_WARN("Other devices on bus with %s, not doing bus reset",
dev->name);
return -1;
}
We also have a bug tracking this issue:
https://bugzilla.redhat.com/499678
Fixes welcome! :-)
Cheers,
Mark.