Xen users - Apr 2008 - Syntax for PCI Pass-Thru for multiple devices?

Hi All,

This might be a stupid question, but I have two PCI devices that I want 
to pass-thru to a PV domU.  I can pass one of them, but not both.  I''m 
sure it''s a stupid syntax issue within my configuration file.  When I
do
a "lspci" in the domU, (CentOS 5.1), only one of the devices shows up.

(e.g.) 00:00.0 Multimedia video controller: Internext Compression Inc 
iTVC16 (CX23416) MPEG-2 Encoder (rev 01)

The two devices are, (01:08.0) and (01:09.0) in dom0.  If I do either of 
the following:

pci = [ "01:08.0" ] or pci = [ "01:09.1" ] in the
configuration file,
they''ll show up.

I''ve tried:

pci = [ "01:08.0, 01:09.0" ]
pci = [ "01:08.0,01:09.0" ]
pci = [ "01:08.0", "01:09.0" ]
pci = [ "01:08.0","01:09.0" ]

No go on getting both passed.  I''m sure I''m just doing
something stupid
with the syntax.

Any help would be appreciated!  Thanks!

P.S.  Both devices are TV Tuner cards.  I''ve verified the drivers for 
them in dom0 are not loaded/unbound and both devices exist in 
/sys/bus/pci/drivers/pciback/.

-- 
Cheers,
Daniel Kao, Übermind
Seattle, WA
dkao@ubermind.com


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Hi Daniel,

try this:

pci = [ ''01:08.0'',''01:09.0'' ]

If it still doesn''t work, try using noirqdebug. I am not sure if you 
have to add it to your grub config or at the extra line in domU config 
but it resolves Problems with PCI devices sharing one IRQ. Maybe you 
just google it, to get the full information on this.

Good luck,
Age_M

Daniel Kao wrote:
> Hi All,
>
> This might be a stupid question, but I have two PCI devices that I 
> want to pass-thru to a PV domU.  I can pass one of them, but not 
> both.  I''m sure it''s a stupid syntax issue within my
configuration
> file.  When I do a "lspci" in the domU, (CentOS 5.1), only one of
the
> devices shows up.
>
> (e.g.) 00:00.0 Multimedia video controller: Internext Compression Inc 
> iTVC16 (CX23416) MPEG-2 Encoder (rev 01)
>
> The two devices are, (01:08.0) and (01:09.0) in dom0.  If I do either 
> of the following:
>
> pci = [ "01:08.0" ] or pci = [ "01:09.1" ] in the
configuration file,
> they''ll show up.
>
> I''ve tried:
>
> pci = [ "01:08.0, 01:09.0" ]
> pci = [ "01:08.0,01:09.0" ]
> pci = [ "01:08.0", "01:09.0" ]
> pci = [ "01:08.0","01:09.0" ]
>
> No go on getting both passed.  I''m sure I''m just doing
something
> stupid with the syntax.
>
> Any help would be appreciated!  Thanks!
>
> P.S.  Both devices are TV Tuner cards.  I''ve verified the drivers
for
> them in dom0 are not loaded/unbound and both devices exist in 
> /sys/bus/pci/drivers/pciback/.
>

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Hi Age_M,

I''ll give it a try!  Thanks!  I thought about switching to
single-quotes
from double-quotes but haven''t done it yet.  The PCI devices are 
definitely IRQ sharing (IRQ''s 21 and 22).  I''ll play around
some more.
Since at least one of them showed up in domU, I knew at least it was a 
good sign ;)

Thanks, again!

Cheers,
Daniel

Age_M wrote:
> Hi Daniel,
>
> try this:
>
> pci = [ ''01:08.0'',''01:09.0'' ]
>
> If it still doesn''t work, try using noirqdebug. I am not sure if
you
> have to add it to your grub config or at the extra line in domU config 
> but it resolves Problems with PCI devices sharing one IRQ. Maybe you 
> just google it, to get the full information on this.
>
> Good luck,
> Age_M
>
> Daniel Kao wrote:
>> Hi All,
>>
>> This might be a stupid question, but I have two PCI devices that I 
>> want to pass-thru to a PV domU.  I can pass one of them, but not 
>> both.  I''m sure it''s a stupid syntax issue within my
configuration
>> file.  When I do a "lspci" in the domU, (CentOS 5.1), only
one of the
>> devices shows up.
>>
>> (e.g.) 00:00.0 Multimedia video controller: Internext Compression Inc 
>> iTVC16 (CX23416) MPEG-2 Encoder (rev 01)
>>
>> The two devices are, (01:08.0) and (01:09.0) in dom0.  If I do either 
>> of the following:
>>
>> pci = [ "01:08.0" ] or pci = [ "01:09.1" ] in the
configuration file,
>> they''ll show up.
>>
>> I''ve tried:
>>
>> pci = [ "01:08.0, 01:09.0" ]
>> pci = [ "01:08.0,01:09.0" ]
>> pci = [ "01:08.0", "01:09.0" ]
>> pci = [ "01:08.0","01:09.0" ]
>>
>> No go on getting both passed.  I''m sure I''m just
doing something
>> stupid with the syntax.
>>
>> Any help would be appreciated!  Thanks!
>>
>> P.S.  Both devices are TV Tuner cards.  I''ve verified the
drivers for
>> them in dom0 are not loaded/unbound and both devices exist in 
>> /sys/bus/pci/drivers/pciback/.
-- 
Cheers,
Daniel Kao, Übermind
Seattle, WA
dkao@ubermind.com


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