Xen users - Apr 2006 - activate pci card in domU???

Hi all,

Playing with xen since 1.0.  The work you all have done is magnificent. 
  Kudos!!!

Currently running xen-3.0.2-2 w/ linux 2.6.16-xen built from sources 
with a domain-0 and five domU''s, all happily networked, on my laptop. 
Each of them is running a complete mail delivery subsystem with qmail 
and vpopmail.  This thing screams :D

I''m now trying to move a pci network card into a domU with limited
success.

In grub on module line is pciback.hide(02:00.0).  The fact that my 
network disappeared from domain-0 shows it has been hidden.

In a domU config file has pci = [ ''02:00.0'' ] and no vif =
[''''] line.

After booting that domU, lspci shows:

   02:00.0 Ethernet controller: Broadcom Corporation NetXtreme
           BCM5702X Gigabit Ethernet (rev 02)

showing that the domU now owns that card; however, all attempts to 
configure it fail with tg3 timeout errors.

Can somebody nudge me in the correct direction or possibly attach a 
script that they''ve successfully used exporting a pci device to a domU?

Any and all help greatly appreciated!

Mike Wright :m)

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On Fri, 2006-04-28 at 11:19 -0700, list user wrote:
> 
> After booting that domU, lspci shows:
> 
>    02:00.0 Ethernet controller: Broadcom Corporation NetXtreme
>            BCM5702X Gigabit Ethernet (rev 02)
> 
> showing that the domU now owns that card; however, all attempts to 
> configure it fail with tg3 timeout errors.
> 
> Can somebody nudge me in the correct direction or possibly attach a 
> script that they''ve successfully used exporting a pci device to a
domU?
> 
> Any and all help greatly appreciated!
Hi Mike,

Check out this e-mail from the archives:
http://article.gmane.org/gmane.comp.emulators.xen.devel/21087

Basically your problem is that the tg3 card puts some device specific
registers in the PCI configuration space (which I believe the PCI
specification recommends that device manufacturer''s not do). As a
security measure, the configuration space is write-protected by the PCI
backend. The tg3 device driver is probably trying to enable/talk to the
card, but the PCI backend is blocking the writes. You''ll need to
disable
the write protection by enabling "permissive" mode as indicated in the
link above (it''s a module parameter that you can pass on the kernel
command-line or enable through sysfs).

Ryan


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