direct i/o with qemu

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Hi

The -pcidevice host=bus:dev.func   option of qemu  defines the   pcidevice 
 we want  the guest to use .
It turns out that if  a host device has a twin pci devices (e.g  2 NICs) 
then only the first of them can be passed to the  qemu and
be used by the guest . The second can be passed of course but is not used 
effectively .
e.g : 0b:00.0 /0b:00.1 .  The mirror device at the  guest always shows up 
as 00:05.0  and can effectively map only
0b:0.0

Any idea where  this limitation comes from ?

thanks

Zvi Dubitzky 
Virtualization and System Architecture   Email:dubi@xxxxxxxxxx
IBM Haifa Research Laboratory    Phone: +972-4-8296182
Haifa, 31905, ISRAEL 


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