xen discuss - Apr 2009 - pcplusmp error when pass through a physical device to xvm snv_112 guest

Hi folks,

I am adding device pass-through functionality in xVM, based on the
source under xen-gate. I''ve made some modifications on qemu and xen
python tools, mostly due to the different methods of pci access
methods between Linux and Solaris.

When I configured it to pass through a Realtek ethernet port to
Windows or Fedora 10 guests, the port can be seen in the guest and the
drivers load well. However, it''s unable to get an IP address from the
DHCP server. In addition, if I set it to use a static address, it''s
unable to receive/send packages.

When I configured it to pass through the same port to a Nevada build
112 guest, the OS hangs during boot time with the following error
message:

pcplusmp: Remote IRR still not clear for IOAPIC 255 intin 255.
            Interrupts to thispin may cease functionality.

A screen snapshot has been posted with this thread.

I''ve disabled interrupt remapping and x2apic from bios setting.

Anybody has any clue about what probably I''ve missed?

Thanks,
-allen