Hi, A quick google found this for code 43 so it might help. https://passthroughpo.st/apply-error-43-workaround/
On Tue, 27 Oct 2020 at 11:49, James Courtier-Dutton <james.dut...@gmail.com> wrote: > Hi, > > I have a threadripper cpu. > I had some problems some time ago with passthru of a AMD Vega GPU. > I was doing a passthru to a Linux VM. > I don't know if the below fix will help a Nvidia GPU, but thought I would > mention it in case. > A change was needed to qemu to get it working. > With the AMD Vega GPU, the problem was with the PCI window size. 256MB vs > 8GB. > The resize GPU BAR problem appears to be an AMD Threadripper specific, > which is why not many people see the problem. > Also, For me ovmf worked and seabios did not, so try both to see which > works best. > I found that a Linux VM gives better error messages, so you can track the > problem down better than with Windows. > I have no idea what Error Code 43 is, so this bug fix might not help or > apply to you at all. > > The change in qemu is in the mainline qemu now, so make sure you try the > very latest qemu. > For more details, search the archives for the subject "Passthru problems > with a Vega GPU" > If you are interested, the patch that fixed the problem for me was: > diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c > index 8cecb53d5cf6..ac9ef9323ef4 100644 > --- a/hw/vfio/pci.c > +++ b/hw/vfio/pci.c > @@ -2118,6 +2118,7 @@ static void vfio_add_ext_cap(VFIOPCIDevice *vdev) > case 0: /* kernel masked capability */ > case PCI_EXT_CAP_ID_SRIOV: /* Read-only VF BARs confuse OVMF */ > case PCI_EXT_CAP_ID_ARI: /* XXX Needs next function > virtualization */ > + case PCI_EXT_CAP_ID_REBAR: > trace_vfio_add_ext_cap_dropped(vdev->vbasedev.name, cap_id, > next); > break; > default: > > > > On Mon, 26 Oct 2020 at 02:25, Roger Lawhorn <r...@twc.com> wrote: > >> i use seabios. >> ovmf gives me troubles. >> i use amd threadripper cpu. >> >> >> On 10/25/20 7:32 AM, Ivan Volosyuk wrote: >> > Interesting. I never passed the rom option to my 2080 ti and it works >> > fine with windows 10. In January 2020 I was using qemu-4.0, since then >> > I swapped a few versions of qemu till 5.1 and it works fine without >> > the rom option. I use intel CPUs though. I wonder if that's the >> > difference. >> > I use edk2-ovmf though. I wasn't able to get it to work with seabios. >> > >> > On Sun, Oct 25, 2020 at 8:59 PM Roger Lawhorn <r...@twc.com> wrote: >> >> I tried pushing off my rtx 2080 to windows 10. >> >> Kept getting code 43. >> >> >> >> I added hv_time,kvm=off,hv_vendor_id=null to my -cpu line and it >> fixed the issue. >> >> Just in case someone else has this issue. >> >> I also had to download a rom file that matched my video card. >> >> QEMU cannot get past the option rom execution without the rom file. >> >> >> >> >> >> Here is my code: >> >> >> >> qemu4.0-system-x86_64 -machine type=q35,accel=kvm -cpu >> EPYC,hv_time,kvm=off,hv_vendor_id=null \ >> >> -chardev stdio,id=seabios -device >> isa-debugcon,iobase=0x402,chardev=seabios \ >> >> -smp $1,sockets=1,cores=$1 \ >> >> -global q35-pcihost.pci-hole64-size=11G \ >> >> -bios /usr/share/seabios/bios.bin \ >> >> -m 32G \ >> >> -vga none \ >> >> -soundhw hda \ >> >> -mem-prealloc \ >> >> -rtc clock=host,base=localtime \ >> >> -device >> ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \ >> >> -device >> vfio-pci,host=0a:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on,romfile=/media/dad/QEMU-SSD/qemu-wd/rtx.rom >> >> >> >> >> >> >> >> >> >> Where I got my rom file: >> >> >> https://www.techpowerup.com/vgabios/204970/palit-rtx2080ti-11264-180919 >> >> >> >> >> >> _______________________________________________ >> >> vfio-users mailing list >> >> vfio-users@redhat.com >> >> https://www.redhat.com/mailman/listinfo/vfio-users >> >> _______________________________________________ >> vfio-users mailing list >> vfio-users@redhat.com >> https://www.redhat.com/mailman/listinfo/vfio-users >> >>
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