Re: [vfio-users] radeon vfio bus information issue?
And done. I just changed the machine type to the Q35 most recent available for me: pc-q35-2.8 The default PCIE layout worked. Up and running with Wayland on the R9 290. Thank you Alex! I hope someone else gets to enjoy a similar setup too! On 24 Oct 2016, at 10:43, Alex Williamson wrote: On Mon, 24 Oct 2016 10:38:08 -0700 globalgorri...@fastmail.fm wrote: On 24 Oct 2016, at 10:23, Alex Williamson wrote: On Mon, 24 Oct 2016 10:20:08 -0700 globalgorri...@fastmail.fm wrote: Hi, Pass-through works fine with the the same linux 4.8 VM and nouveau and a Quadro K2200. Passing-through both a R7 260X and and a R9 290 I get the same kernel oops: IP: [] drm_pcie_get_speed_cap_mask+0x39/0xf0 [drm] More here: http://pastebin.com/Waysyk2e Both the AMD cards work fine if I pass them through to a Windows VM. I'm supposing this might likely be then an issue with Radeon. However the oops makes me think perhaps it's breaking on unexpected PCIE information? Is it possible there some missing information in that radeon is looking for that's missing? What PCIE information is passed through by vfio (lspci from both host and vm also in the pastebin)? Anybody using radeon with passthrough AMD cards and seen this? Radeon with a Linux guest is actually one of the few cases where you need to be running a Q35 machine with the GPU placed behind a PCIe downstream/root port. The code blindly assumes that an upstream PCIe bridge is present and tries to poke registers on it. Bingo. I'll have to clone and try with that. Alex, do you know if is enough to just simply passthrough the device but with Q35? Or is a custom topology needed? I would recommend a PCIe root port with the Radeon on the bus created by that. The Linux driver assumes this sort of topology. ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
Re: [vfio-users] radeon vfio bus information issue?
On Mon, 24 Oct 2016 10:38:08 -0700 globalgorri...@fastmail.fm wrote: > On 24 Oct 2016, at 10:23, Alex Williamson wrote: > > > On Mon, 24 Oct 2016 10:20:08 -0700 > > globalgorri...@fastmail.fm wrote: > > > >> Hi, > >> > >> Pass-through works fine with the the same linux 4.8 VM and nouveau > >> and a > >> Quadro K2200. > >> > >> Passing-through both a R7 260X and and a R9 290 I get the same kernel > >> oops: > >> > >> IP: [] drm_pcie_get_speed_cap_mask+0x39/0xf0 [drm] > >> > >> More here: > >> http://pastebin.com/Waysyk2e > >> > >> Both the AMD cards work fine if I pass them through to a Windows VM. > >> > >> I'm supposing this might likely be then an issue with Radeon. > >> > >> However the oops makes me think perhaps it's breaking on unexpected > >> PCIE > >> information? > >> > >> Is it possible there some missing information in that radeon is > >> looking > >> for that's missing? What PCIE information is passed through by vfio > >> (lspci from both host and vm also in the pastebin)? > >> > >> Anybody using radeon with passthrough AMD cards and seen this? > > > > Radeon with a Linux guest is actually one of the few cases where you > > need to be running a Q35 machine with the GPU placed behind a PCIe > > downstream/root port. The code blindly assumes that an upstream PCIe > > bridge is present and tries to poke registers on it. > > Bingo. > > I'll have to clone and try with that. > > Alex, do you know if is enough to just simply passthrough the device but > with Q35? Or is a custom topology needed? I would recommend a PCIe root port with the Radeon on the bus created by that. The Linux driver assumes this sort of topology. ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
Re: [vfio-users] radeon vfio bus information issue?
On 24 Oct 2016, at 10:23, Alex Williamson wrote: On Mon, 24 Oct 2016 10:20:08 -0700 globalgorri...@fastmail.fm wrote: Hi, Pass-through works fine with the the same linux 4.8 VM and nouveau and a Quadro K2200. Passing-through both a R7 260X and and a R9 290 I get the same kernel oops: IP: [] drm_pcie_get_speed_cap_mask+0x39/0xf0 [drm] More here: http://pastebin.com/Waysyk2e Both the AMD cards work fine if I pass them through to a Windows VM. I'm supposing this might likely be then an issue with Radeon. However the oops makes me think perhaps it's breaking on unexpected PCIE information? Is it possible there some missing information in that radeon is looking for that's missing? What PCIE information is passed through by vfio (lspci from both host and vm also in the pastebin)? Anybody using radeon with passthrough AMD cards and seen this? Radeon with a Linux guest is actually one of the few cases where you need to be running a Q35 machine with the GPU placed behind a PCIe downstream/root port. The code blindly assumes that an upstream PCIe bridge is present and tries to poke registers on it. Bingo. I'll have to clone and try with that. Alex, do you know if is enough to just simply passthrough the device but with Q35? Or is a custom topology needed? Thanks! ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
Re: [vfio-users] radeon vfio bus information issue?
On Mon, 24 Oct 2016 10:20:08 -0700 globalgorri...@fastmail.fm wrote: > Hi, > > Pass-through works fine with the the same linux 4.8 VM and nouveau and a > Quadro K2200. > > Passing-through both a R7 260X and and a R9 290 I get the same kernel > oops: > > IP: [] drm_pcie_get_speed_cap_mask+0x39/0xf0 [drm] > > More here: > http://pastebin.com/Waysyk2e > > Both the AMD cards work fine if I pass them through to a Windows VM. > > I'm supposing this might likely be then an issue with Radeon. > > However the oops makes me think perhaps it's breaking on unexpected PCIE > information? > > Is it possible there some missing information in that radeon is looking > for that's missing? What PCIE information is passed through by vfio > (lspci from both host and vm also in the pastebin)? > > Anybody using radeon with passthrough AMD cards and seen this? Radeon with a Linux guest is actually one of the few cases where you need to be running a Q35 machine with the GPU placed behind a PCIe downstream/root port. The code blindly assumes that an upstream PCIe bridge is present and tries to poke registers on it. ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
[vfio-users] radeon vfio bus information issue?
Hi, Pass-through works fine with the the same linux 4.8 VM and nouveau and a Quadro K2200. Passing-through both a R7 260X and and a R9 290 I get the same kernel oops: IP: [] drm_pcie_get_speed_cap_mask+0x39/0xf0 [drm] More here: http://pastebin.com/Waysyk2e Both the AMD cards work fine if I pass them through to a Windows VM. I'm supposing this might likely be then an issue with Radeon. However the oops makes me think perhaps it's breaking on unexpected PCIE information? Is it possible there some missing information in that radeon is looking for that's missing? What PCIE information is passed through by vfio (lspci from both host and vm also in the pastebin)? Anybody using radeon with passthrough AMD cards and seen this? Thanks! ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
