hi, i've run with pci=realloc two tests, the results are here (also the dmesg) outputs: https://lastlog.de/wiki/index.php/T530%2BNvida_GTX_660_TI_eGPU_via_PE4H#debugging_using_pci.3Drealloc thanks in advance, joachim schiele On 18.03.2015 18:06, Bjorn Helgaas wrote: > [+cc Alex] > > Hi Joachim, > > Thanks a lot for the bug report. > > On Wed, Mar 18, 2015 at 8:32 AM, Joachim Schiele <js@xxxxxxxxxx> wrote: >> hi, >> >> === question === >> with the setup described below, i can't pass the graphics adapter into a >> KVM guest as described below. >> >> is the BAR stuff in the listing an error i wuld have to fix in order to >> get my eGPU running? if so, what could i do about it > > Yes. If we can't assign resources to the BARs, we can't enable the > device. If you boot with "pci=realloc", Linux will try harder to > assign space (including moving other devices to make space if > necessary). > >> i've seen that the >> laptop will hang on boot if the eGPU is powered on system startup. > > It's possible the BIOS is hanging because it tried to assign space for > the eGPU but failed. > >> i can >> see the adapter after hotplugging it using lspci and i never see an >> image on the external display. > > The device will appear in lspci even if we can't assign space for it. > In that case the device would not work, even though it appears in > lspci. > > So please try "pci=realloc". Also, please collect a complete dmesg > log and "lspci -vv" output (with eGPU attached). That will contain > the information needed to see whether it's possible even in principle > to make this work. > >> my config is this: >> sudo qemu-system-x86_64 -enable-kvm \ >> -m 8192 \ >> -M q35 \ >> -cpu host,kvm=off \ >> -smp 4,sockets=1,cores=4,threads=1 \ >> -vga none \ >> -vnc none \ >> -device >> ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \ >> -device >> vfio-pci,host=04:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on \ >> -device vfio-pci,host=04:00.1,bus=root.1,addr=00.1 \ >> -drive >> file=/home/joachim/en_windows_7_professional_x64_dvd_X15-65805.iso,id=isocd >> -device ide-cd,bus=ide.1,drive=isocd \ >> -drive file=/var/lib/libvirt/images/win7.qcow2,format=qcow2,id=hdd >> -device ide-hd,bus=ide.0,drive=hdd \ >> -bios /usr/share/seabios/bios.bin \ >> -soundhw ac97 >> >> === when hotplugging the eGPU === >> i want to use a Nvidia GTX 660 TI as an eGPU using PE4H and when i >> hotplug the ePCI adapter i get this log on a 3.18 ubuntu kernel: >> >> [ 960.145002] vgaarb: device changed decodes: >> PCI:0000:00:02.0,olddecodes=none,decodes=io+mem:owns=none >> [ 966.574858] pci 0000:04:00.0: [10de:1183] type 00 class 0x030000 >> [ 966.574892] pci 0000:04:00.0: reg 0x10: [mem 0x00000000-0x00ffffff] >> [ 966.574921] pci 0000:04:00.0: reg 0x14: [mem 0x00000000-0x07ffffff >> 64bit pref] >> [ 966.574950] pci 0000:04:00.0: reg 0x1c: [mem 0x00000000-0x01ffffff >> 64bit pref] >> [ 966.574963] pci 0000:04:00.0: reg 0x24: [io 0x0000-0x007f] >> [ 966.574974] pci 0000:04:00.0: reg 0x30: [mem 0x00000000-0x0007ffff pref] >> [ 966.575224] vgaarb: device added: >> PCI:0000:04:00.0,decodes=io+mem,owns=none,locks=none >> [ 966.575227] vgaarb: device changed decodes: >> PCI:0000:00:02.0,olddecodes=io+mem,decodes=none:owns=none >> [ 966.575327] pci 0000:04:00.1: [10de:0e0a] type 00 class 0x040300 >> [ 966.575356] pci 0000:04:00.1: reg 0x10: [mem 0x00000000-0x00003fff] >> [ 966.998345] pci 0000:04:00.0: BAR 1: no space for [mem size >> 0x08000000 64bit pref] >> [ 966.998350] pci 0000:04:00.0: BAR 1: failed to assign [mem size >> 0x08000000 64bit pref] >> [ 966.998353] pci 0000:04:00.0: BAR 3: no space for [mem size >> 0x02000000 64bit pref] >> [ 966.998355] pci 0000:04:00.0: BAR 3: failed to assign [mem size >> 0x02000000 64bit pref] >> [ 966.998357] pci 0000:04:00.0: BAR 0: no space for [mem size 0x01000000] >> [ 966.998358] pci 0000:04:00.0: BAR 0: failed to assign [mem size >> 0x01000000] >> [ 966.998360] pci 0000:04:00.0: BAR 6: assigned [mem >> 0xf1400000-0xf147ffff pref] >> [ 966.998363] pci 0000:04:00.1: BAR 0: assigned [mem 0xf1480000-0xf1483fff] >> [ 966.998369] pci 0000:04:00.1: BAR 0: error updating (0xf1480000 != >> 0xffffffff) >> [ 966.998373] pci 0000:04:00.0: BAR 5: assigned [io 0x3000-0x307f] >> [ 966.998379] pci 0000:04:00.0: BAR 5: error updating (0x003001 != >> 0xffffffff) >> [ 966.998392] pcieport 0000:00:1c.2: Max Payload Size set to 128/ 128 >> (was 128), Max Read Rq 128 >> [ 966.998403] pci 0000:04:00.0: Max Payload Size set to 16384/ 256 (was >> 16384), Max Read Rq 16384 >> [ 966.998414] pci 0000:04:00.1: Max Payload Size set to 16384/ 256 (was >> 16384), Max Read Rq 16384 >> [ 966.998472] pci-stub 0000:04:00.0: claimed by stub >> [ 966.998495] pci-stub 0000:04:00.1: claimed by stub >> [ 967.099040] pcieport 0000:00:1c.2: Max Payload Size set to 128/ 128 >> (was 128), Max Read Rq 128 >> [ 967.099059] pci-stub 0000:04:00.0: Max Payload Size set to 128/ 256 >> (was 128), Max Read Rq 512 >> [ 967.099075] pci-stub 0000:04:00.1: Max Payload Size set to 128/ 256 >> (was 128), Max Read Rq 512 >> [ 7735.938854] vgaarb: device changed decodes: >> PCI:0000:00:02.0,olddecodes=none,decodes=io+mem:owns=none >> >> >> >> >> more at: >> >> https://lastlog.de/wiki/index.php/T530%2BNvida_GTX_660_TI_eGPU_via_PE4H >> >> i derived the scripts i'm using from this guide: >> http://www.pugetsystems.com/labs/articles/Multiheaded-NVIDIA-Gaming-using-Ubuntu-14-04-KVM-585/ >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-pci" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
