Hi All, I have found the issue. I cross compiled this kernel with GCC 11.2.0 on Ubuntu 22.04.1. I cross compiled the same kernel with GCC 9.4.0 again. This time on Ubuntu 20.04.5. KVM with the VirtIO GPU works with the GCC 9.4.0 compiled kernel. — Christian I wrote: Hello, Xorg doesn't start anymore in a virtual e5500 QEMU KVM HV machine with the VirtIO GPU [1] since the RC7 of kernel 6.0. [2] Please find attached the kernel config. Thanks, Christian [1] qemu-system-ppc64 -M ppce500 -cpu e5500 -m 1024 -kernel uImage-6.0 -drive format=raw,file=void-live-powerpc-20220129.img,index=0,if=virtio -netdev user,id=mynet0 -device virtio-net,netdev=mynet0 -append "rw root=/dev/vda2" -device virtio-gpu -device virtio-mouse-pci -device virtio-keyboard-pci -device pci-ohci,id=newusb -audiodev id=sndbe,driver=pa,server=/run/user/1000/pulse/native -device usb-audio,bus=newusb.0 -enable-kvm -smp 4 -fsdev local,security_model=passthrough,id=fsdev0,path=/home/amigaone/Music -device virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=hostshare [2] Error messages in a virtual Void PPC machine: [drm] pci: virtio-gpu-pci detected at 0000:00:02.0 [drm] features: -virgl +edid -resource_blob -host_visible [drm] features: -context_init [drm] number of scanouts: 1 [drm] number of cap sets: 0 [drm] Initialized virtio_gpu 0.1.0 0 for virtio1 on minor 0 BUG: Kernel NULL pointer dereference on read at 0x00000000 Faulting instruction address: 0xc0000000000c9934 Oops: Kernel access of bad area, sig: 11 [#1] BE PAGE_SIZE=4K SMP NR_CPUS=4 QEMU e500 Modules linked in: CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc7_A-EON_X5000 #1 NIP: c0000000000c9934 LR: c0000000000c9f58 CTR: 0000000000000000 REGS: c00000000208ab20 TRAP: 0300 Not tainted (6.0.0-rc7_A-EON_X5000) MSR: 0000000090029002 <CE,EE,ME> CR: 84008242 XER: 00000000 DEAR: 0000000000000000 ESR: 0000000000000000 IRQMASK: 0 GPR00: c0000000006f0060 c00000000208adc0 c000000001ac3500 c0000000025f0010 GPR04: 0000000000000000 0000000000000000 0000000000000000 c0000000019908b0 GPR08: 0000000000000105 0000000000000000 0000000000000000 0000000000000180 GPR12: 0000000024008242 c00000003fff9500 c000000000001384 0000000000000000 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 c00000000169021f c00000000208b088 GPR24: 0000000000000000 c000000002336800 0000000000000000 0000000000000000 GPR28: c000000002a48000 c000000002336800 0000000000000000 c0000000025f0010 NIP [c0000000000c9934] .dma_map_direct+0x8/0x10 LR [c0000000000c9f58] .dma_max_mapping_size+0x24/0x78 Call Trace: [c00000000208adc0] [c00000000208ae80] 0xc00000000208ae80 (unreliable) [c00000000208ae40] [c0000000006f0060] .drm_prime_pages_to_sg+0xa0/0xb8 [c00000000208aed0] [c00000000070f96c] .drm_gem_shmem_get_sg_table+0x28/0x3c [c00000000208af40] [c000000000808c8c] .virtio_gpu_object_create+0x134/0x3a8 [c00000000208b010] [c000000000804c34] .virtio_gpu_mode_dumb_create+0xe4/0x15c [c00000000208b110] [c0000000006ff7f4] .drm_mode_create_dumb+0xcc/0xec [c00000000208b180] [c000000000707748] .drm_client_framebuffer_create+0x98/0x1f0 [c00000000208b260] [c00000000071fb6c] .drm_fb_helper_generic_probe+0x78/0x1a0 [c00000000208b320] [c00000000071ef08] .__drm_fb_helper_initial_config_and_unlock+0x428/0x54c [c00000000208b410] [c00000000071f9dc] .drm_fbdev_client_hotplug+0xec/0x128 [c00000000208b4a0] [c00000000071fdec] .drm_fbdev_generic_setup+0x158/0x198 [c00000000208b530] [c000000000803dc4] .virtio_gpu_probe+0x1ac/0x1e0 [c00000000208b5f0] [c00000000069e11c] .virtio_dev_probe+0x2d0/0x3d4 [c00000000208b690] [c000000000815f34] .really_probe+0x1a0/0x344 [c00000000208b720] [c0000000008161c8] .__driver_probe_device+0xf0/0x100 [c00000000208b7b0] [c00000000081620c] .driver_probe_device+0x34/0xac [c00000000208b840] [c000000000816774] .__driver_attach+0x124/0x134 [c00000000208b8d0] [c000000000813974] .bus_for_each_dev+0x8c/0xd0 [c00000000208b980] [c0000000008154a4] .driver_attach+0x24/0x38 [c00000000208b9f0] [c000000000814dd4] .bus_add_driver+0xd8/0x210 [c00000000208baa0] [c000000000816fd4] .driver_register+0xe0/0x134 [c00000000208bb20] [c00000000069d8a8] .register_virtio_driver+0x40/0x54 hrtimer: interrupt took 4631040 ns [c00000000208bb90] [c000000001954444] .virtio_gpu_driver_init+0x18/0x2c [c00000000208bc00] [c000000000001044] .do_one_initcall+0x7c/0x1c0 [c00000000208bce0] [c000000001925710] .kernel_init_freeable+0x23c/0x240 [c00000000208bd90] [c0000000000013ac] .kernel_init+0x28/0x14c [c00000000208be10] [c0000000000005a0] .ret_from_kernel_thread+0x58/0x60 Instruction dump: 39200001 7c23f840 38210080 7d20485e 792307e0 48d551d8 7c9f2378 4bffffdc 792307e0 4e800020 e92301f8 7c852378 <e8890000> 4bffff7c 7c0802a6 28060003 ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b Rebooting in 180 seconds..
