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Re: [Xen-users] GPL PV drivers

Thanks Pasi, just the info I was looking for.

Thanks again.

- Brian

On Jan 7, 2010, at 10:20 PM, Pasi Kärkkäinen wrote:

On Thu, Jan 07, 2010 at 05:15:28PM -0800, Brian Krusic wrote:
Hi james.

Perhaps you can help me.

So I have pic pass through working for an Nvidia card which is my 2nd
graphics adapter.

I wish to dedicate it to a particular domU.

Besides adding the below line in my domU config file;

pci = ['07:00.0']

What else do I need to do before compiling Nvidia drivers (I found a
few write ups that tell you how to do this) in that domU?


VGA/graphics pci passthrough is pretty much different from a 'normal'
PCI passthrough (NIC, disk controller/HBA, usb host, sound card).

VGA passthrough requires emulation of various legacy x86 memory ranges, IO ports, and whatnot. It also requires re-execution of VGA adapter BIOS
in the guest.

Various people have gotten it working with xen-unstable (upcoming Xen 4.0)
but I think all of them needed some custom modified patches.

Intel guys have been working on VGA passthrough stuff.
See xen-devel mailinglist archives about Xen VGA passthrough.

-- Pasi

Incidentally, do you know how to make the above pci line work in the
new domU config syntax?

- Brian

On Jan 7, 2010, at 5:03 PM, James Harper wrote:

Hi,
Is James Harper / GPL PV drivers
borrowed some GPL code from the Linux kernel related to enumering
PCI devices
on Windows or something like this?
Can someone please clarify this. Thank you in advance.

I'm not sure what the question is. I used the Linux PV stuff as
inspiration for the GPLPV drivers and there is some direct cut &
paste in there but Windows is sufficiently different to Linux that
most of the work had to be done from scratch.

Or maybe you asking about PCI passthrough?

James
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