Hi! I am trying to get my Xen domU correctly working with vga passthrough and Win7 32 bit or 64 bit. At the moment graphics does not work at all, i believe that my Quadro K600, GTS 450 or GeForce 7600 GS video card even shouldnt work with Win7 under domU although with Ubuntu guests they work (at least Ubuntu domU could be booted up once successfully with graphics). So, gts 450 -> quardo 2000 to the rescue :) I would be very thankful if somebody goes thru the rest of this letter and confirms what i intend to do is correct and also cares to answer some questions. First of all i went thru these articles 1. http://www.altechnative.net/2013/11/25/virtualized-gaming-nvidia-cards-part-3-how-to-modify-a-fermi-based-geforce-into-a-quadro-geforce-gts450gtx470gtx480-to-quadro-200050006000/ 2. https://devtalk.nvidia.com/default/topic/489965/cuda-programming-and-performance/gtx480-to-c2050-hack-or-unlocking-tcc-mode-on-geforce/post/3511598/#3511598 3. http://www.davidgis.fr/blog/index.php?2013/09/18/969-xen-430-vga-passthrough-gtx-480-soft-moded-to-quadro-6000 As i understand they more-or-less describe the same procedure, i compiled this sequence for myself. 1. my hardware is http://www.gigabyte.us/products/product-page.aspx?pid=3600#ov 2. booted computer under natively installed Win7 32 bit, installed driver from nvidia.com, gpu-z from techpowerup.com and saved .rom 3. looked up my gts 450 pci dev id which turns to be 0DC4 # lspci -nn | grep -i vga ... 04:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF106 [GeForce GTS 450] [10de:0dc4] (rev a1) 4. looked up strap area values, taking endianness into account as asking by 4 byte items (all four masks) $ od -tx4 -Ax GF106.rom | grep -A 1 ^000050 000050 002a72e9 35031458 7ffc3fff 00004000 000060 7fffffff 80000000 4aa537e5 e9446ce9 5. wrote down 'and mask 0' and 'or mask 0' in binary form PCI ID bits in mask Fxx4 xxxx xxxx xxxx xx32 10xx xxxx xxxx and mask 0: 7f fc 3f ff 0111 1111 1111 1100 0011 1111 1111 1111 or mask 0: 00 00 40 00 0000 0000 0000 0000 0100 0000 0000 0000 6. my gts 450 pci id is according to lspci 0DC4 and http://us.download.nvidia.com/XFree86/Linux-x86/331.20/README/supportedchips.html says Quadro 2000 is 0DD8, so in binary GTS 450 - 0x0DC4 - 0000 1101 1100 0100 Quadro 2000 - 0x0DD8 - 0000 1101 1101 1000 i see 3 bits within 5 lower bits are different, good. 7. Five special ID Bits (10-13 and 28) can be used to show to the driver pci-id differently, and some of them need to be amended, i hope in my case like this (i understand 'and mask' is for suppressing hardstrap bit value into zero and 'or mask' is for making hardstrap value into one, as driver sees them) 2nd bit in 'and mask 0' from 1 to 0 3rd bit in 'or mask 0' from 0 to 1 4th bit in 'or mask 0' from 0 to 1 so i get such new masks 'and mask 0': 0111 1111 1111 1100 0010 1111 1111 1111 'or mask 0': 0001 0000 0000 0000 0110 0000 0000 0000 they are in hex new 'and mask 0': 7ffc 2fff new 'or mask 0': 0100 6000 9. So all together and takining into account that 31th bit should be always zero (so 'or mask 1' 8000 0000 gets 0000 0000) i need to issue from dos prompt C:\> nvflash --index=X --strap 0x7FFC2FFF 0x10006000 0x7fffffff 0x00000000 Please confirm i got to the right outcome assuming i had the input data i started out from. This is long letter already but i have some more questions 1. GPU-Z says my bios version is 70.06.13.00.01, do i need to update it somehow before coversion into quadro or is it just all right? (and i believe it is not tuned in any way) 2. in https://devtalk.nvidia.com/default/topic/489965/cuda-programming-and-performance/gtx480-to-c2050-hack-or-unlocking-tcc-mode-on-geforce/post/3511598/#3511598 readers are instructed to change besides strap masks many other things like pci dev id at 0x0000018E, Board boot string etc, are those changes essential or rahter so to say cosmetic (and harmless to do)? http://www.altechnative.net/2013/11/25/virtualized-gaming-nvidia-cards-part-3-how-to-modify-a-fermi-based-geforce-into-a-quadro-geforce-gts450gtx470gtx480-to-quadro-200050006000/ isnt mentioning them. 3. a used usb dos boot material as guided at, i hope this is ok (it contains windows millenium dos, nvflash v. 5.100.0.1) http://www.techpowerup.com/forums/threads/guide-for-flashing-bios-of-nvidia-gpu.119955/ 4. i didnt find Quadro 2000 .rom from http://www.techpowerup.com/vgabios/, if anybody is willing to send it to me, it would be interesting to look at (original or yet better gts modified into quadro 2000) Best regards, Imre