On Thu, May 16, 2019 at 4:07 PM Micah Morton <mortonm@xxxxxxxxxxxx> wrote: > > On Wed, May 15, 2019 at 7:19 PM Alex Deucher <alexdeucher@xxxxxxxxx> wrote: > > > > On Wed, May 15, 2019 at 2:26 PM Micah Morton <mortonm@xxxxxxxxxxxx> wrote: > > > > > > Hi folks, > > > > > > I'm interested in running a VM on a system with an integrated Stoney > > > [Radeon R2/R3/R4/R5 Graphics] card and passing through the graphics > > > card to the VM using the IOMMU. I'm wondering whether this is feasible > > > and supposed to be doable with the right setup (as opposed to passing > > > a discrete GPU to the VM, which I think is definitely doable?). > > > > > > So far, I can do all the qemu/kvm/vfio/iommu stuff to run the VM and > > > pass the integrated GPU to it, but the drm driver in the VM fails > > > during amdgpu_device_init(). Specifically, the logs show the SMU being > > > unresponsive, which leads to a 'SMU firmware load failed' error > > > message and kernel panic. I can share VM logs and the invocation of > > > qemu and such if helpful, but first wanted to know at a high level if > > > this should be feasible? > > > > > > P.S.: I'm not initializing the GPU in the host bios or host kernel at > > > all, so I should be passing a fresh GPU to the VM. Also, I'm pretty > > > sure I'm running the correct VGA bios for this GPU in the guest VM > > > bios before guest boot. > > > > > > Any comments/suggestions would be appreciated! > > > > It should work in at least once as long as your vm is properly set up. > > Is there any reason running coreboot vs UEFI at host boot would make a > difference? I was running a modified version of coreboot that avoids > doing any GPU initialization in firmware -- so the first POST happens > inside the guest. The GPU on APUs shares a bunch of resources with the CPU. There are a bunch of blocks which are shared and need to be initialized on both for everything to work properly. > > > Note that the driver needs access to the vbios image in the guest to > > get device specific configuration details (clocks, display connector > > configuration, etc.). > > Is there anything I need to do to ensure this besides passing '-device > vfio-pci,...,romfile=/path/to/vgarom' to qemu? You need the actual vbios rom image from your system. The image is board specific. Alex _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
