fyi from what I recall guest kernel was built using mpc85xx_defconfig with some additions like virtio etc. If virtio is working for you just fine using same command as mine, then perhaps its some peculiarity to do with my specific guest kernel or kernel version? (uImage is about 3.4M with equivalent vmlinux about 72M)
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1856834 Title: Virtio broken in qemu ppc in 4.2.0 and other versions Status in QEMU: New Bug description: The same qemu -M mpc... command that works on qemu-system-ppc version 2.8.0 freezes guest on bootup and shows error for qemu-system-ppc version 4.2.0release and 4.19dirtygit: qemu-system-ppc: virtio-blk failed to set guest notifier (-24), ensure -accel kvm is set. qemu-system-ppc: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower). ends/freezes at: nbd: registered device at major 43 vda: I'm using -drive file=/home/me/rawimage.dd,if=virtio and works fine in version 2.8.0 installed with apt-get install (Ubuntu 17.04) and also with 2.8.0 official release from git/github that I compiled/built myself. But both of the newer releases fail on the same exact machine same config. I also noticed that qemu-2.8.0 was fine with mtd but the newer ones I tried weren't, ie gave qemu-system-ppc: -drive if=mtd: machine type does not support if=mtd,bus=0,unit=0 (but I removed -drive if=mtd since wasn't using it anyway) I also tried on windows but I think virtio doesn't work on windows hosts at all? On windows host it fails the same way, even version 2.12 as well as 4.1.10... used: ./configure --prefix=/opt/... --enable-fdt --enable-kvm --enable-debug (basically all steps the same on same exact system same config, yet 2.8.0 works fine whether apt-get installed or built from source while the others I built, 4.19/4.2.0 or 2.12/4.1.10(win) don't.) In case newer qemu versions act weird on various kernels, I did try with both vmlinuz-4.10.0-19-generic and vmlinuz-4.13.12-041312-generic (I didn't compile them but I can provide config-..files. This is on Ubuntu 17.04 x86_64 host emulating e500v2 cpm guest, ie -M mpc... GUEST kernel 2.6.32.44 which is why I can't use -M ppce500 instead..) tx ecs To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1856834/+subscriptions
