For those of you who have been following the developments surrounding modding Nvidia cards into equivalent Quadro/Grid models for VGA passthrough, I can report that a simplified mod is now available. See this post for details: http://www.eevblog.com/forum/chat/hacking-nvidia-cards-into-their-professional-counterparts/msg316134/#msg316134 Summary - remove resistor for 3rd device ID nibble, modify 2 bytes in the UEFI strap, and you are good to go. This reduces the complexity of the originaly hardware mod by at least 4x, at the expense of a small BIOS mod. Unfortunately, since I am already in PCIe bridge hell due to all of my PCIe slots being behind the broken Nvidia NF200 bridges, the extra layers of bridging on a GTX690 make it unworkable with my motherboard, so if anybody is interested in a new, gridified GTX690, drop me an email off-list. Gordan
On Fri, Oct 25, 2013 at 6:01 AM, Gordan Bobic <gordan@bobich.net> wrote:> For those of you who have been following the developments > surrounding modding Nvidia cards into equivalent > Quadro/Grid models for VGA passthrough, I can report that > a simplified mod is now available. See this post for > details: > > http://www.eevblog.com/forum/**chat/hacking-nvidia-cards-** > into-their-professional-**counterparts/msg316134/#**msg316134<http://www.eevblog.com/forum/chat/hacking-nvidia-cards-into-their-professional-counterparts/msg316134/#msg316134> > > Summary - remove resistor for 3rd device ID nibble, > modify 2 bytes in the UEFI strap, and you are good > to go. > > This reduces the complexity of the originaly hardware > mod by at least 4x, at the expense of a small BIOS > mod. > > Unfortunately, since I am already in PCIe bridge hell > due to all of my PCIe slots being behind the broken > Nvidia NF200 bridges, the extra layers of bridging > on a GTX690 make it unworkable with my motherboard, > so if anybody is interested in a new, gridified > GTX690, drop me an email off-list. > > Gordan > > ______________________________**_________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xen.org/xen-users >Just reading through this, and some of the other threads on this topic, I had a random idea and just wondered if it was feasible; would be possible to translate/change the reported PCI Device ID at the QEMU/Passthrough layer? Regards, David _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
On 10/25/2013 07:32 PM, David Sutton wrote:> > On Fri, Oct 25, 2013 at 6:01 AM, Gordan Bobic <gordan@bobich.net > <mailto:gordan@bobich.net>> wrote: > > For those of you who have been following the developments > surrounding modding Nvidia cards into equivalent > Quadro/Grid models for VGA passthrough, I can report that > a simplified mod is now available. See this post for > details: > > http://www.eevblog.com/forum/__chat/hacking-nvidia-cards-__into-their-professional-__counterparts/msg316134/#__msg316134 > <http://www.eevblog.com/forum/chat/hacking-nvidia-cards-into-their-professional-counterparts/msg316134/#msg316134> > > Summary - remove resistor for 3rd device ID nibble, > modify 2 bytes in the UEFI strap, and you are good > to go. > > This reduces the complexity of the originaly hardware > mod by at least 4x, at the expense of a small BIOS > mod. > > Unfortunately, since I am already in PCIe bridge hell > due to all of my PCIe slots being behind the broken > Nvidia NF200 bridges, the extra layers of bridging > on a GTX690 make it unworkable with my motherboard, > so if anybody is interested in a new, gridified > GTX690, drop me an email off-list. > > Just reading through this, and some of the other threads on this topic, > I had a random idea and just wondered if it was feasible; would be > possible to translate/change the reported PCI Device ID at the > QEMU/Passthrough layer?It''d certainly be nice if this were possible. I don''t know what it would take to write a shim to do this, and the IOMMU might get in the way. Gordan