| Mark, Thanks for your reply. So it looks like KVM works pretty well on the G4. Doing a bit of Macrumors forums archeology it seems as though: Linux debian 4.19.0-4-powerpc64 #1 SMP Debian 4.19.28-2 (2019-03-15) ppc64 worked.
Dan On 24 Jan 2023, at 00:33, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> wrote:
On 23/01/2023 14:42, Dan Whitehouse wrote:Hi Luigi,
It doesn’t work for me at all:
crab@powermac-g5:~/Documents/Qemu$ uname -a
Linux powermac-g5 6.0.0-6-powerpc64 #1 SMP Debian 6.0.12-1 (2022-12-09) ppc64 GNU/Linux
crab@powermac-g5:~/Documents/Qemu$ lsmod | grep kvm
kvm_pr 110777 0
kvm 309830 1 kvm_pr
#!/bin/bash
qemu-system-ppc64 \
-boot c \
-M mac99,via=pmu \
-m 2048 \
--enable-kvm \
-drive file=/srv/Qemu/debian_64bit.qcow2,format=qcow2,media=disk \
-netdev user,id=mynet0,net=192.168.76.0/24,dhcpstart=192.168.76.10 \
-device sungem,netdev=mynet0 \
-monitor stdio
Result:
dmesg is flooded with:
#!/bin/bash
[22936.303544] Couldn't emulate instruction 0x00000000 (op 0 xop 0)
[22936.315006] kvmppc_exit_pr_progint: emulation at 100 failed (00000000)
Exactly as described here:
Re: [PATCH 2/9] target/ppc: add errp to kvmppc_read_int_cpu_dt() <https://www.mail-archive.com/qemu-devel@nongnu.org/msg898334.html>
mail-archive.com <https://www.mail-archive.com/qemu-devel@nongnu.org/msg898334.html>
apple-touch-icon-114x114.png <https://www.mail-archive.com/qemu-devel@nongnu.org/msg898334.html>
<https://www.mail-archive.com/qemu-devel@nongnu.org/msg898334.html>
Can you let me know:
1./ what is your host OS and kernel version?
2./ what version of Qemu you are using? (I’m using the version in Debian ports).
3./ what arguments are you using to start your guest?
Does it also work in Libvirt?
Hi Dan,Sorry for being late to this thread, but I got around to firing up my G4 Mac Mini earlier this evening to see what works and what doesn't work with KVM. My setup is as follows:OS:$ uname -aLinux macmini 5.1.0-rc2+ #56 Wed Mar 27 00:38:43 GMT 2019 ppc GNU/LinuxInstallation of Debian ports ppc32 distributionQEMU:commit 9548cbeffffd4253e38570d29b8cff0bf77c998f (HEAD -> master, origin/staging, origin/master, origin/HEAD)Author: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>Date: Wed Jul 6 20:08:34 2022 +0300 iotests/copy-before-write: specify required_fmts Declare that we need copy-before-write filter to avoid failure when filter is not whitelisted. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Tested-by: Thomas Huth <thuth@redhat.com> Message-Id: <20220706170834.242277-1-vsementsov@yandex-team.ru> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> built using: './configure' '--target-list=ppc-softmmu' --disable-werror make V=1 installWith that setup I see the following results when attempting to boot OSs with KVM-PR:OS X 10.2: -M mac99[,via=cuda]: boots to start of installer, then errors out with "The Installer has quit due to an unexpected error. (exit code 0) ./qemu-system-ppc -machine accel=kvm -cdrom osxdisk1.iso \ -boot d -M mac99 -m 256 -prom-env 'boot-args=-v' -M mac99,via=pmu: boots to installer ./qemu-system-ppc -machine accel=kvm -cdrom osxdisk1.iso \ -boot d -M mac99,via=pmu -m 256 -prom-env 'boot-args=-v' -M g3beige: boots to installer ./qemu-system-ppc -machine accel=kvm -cdrom osxdisk1.iso \ -boot d -m 256 -prom-env 'boot-args=-v'Debian ports PPC (debian-9.0-powerpc-NETINST-1.iso): -M mac99[,via=cuda]: hangs on yaboot (keyboard unresponsive?) ./qemu-system-ppc -machine accel=kvm -cdrom debian-9.0-powerpc-NETINST-1.iso \ -boot d -m 256 -prom-env 'boot-args=-v' -M mac99,via=pmu: hangs on yaboot (keyboard unresponsive?) ./qemu-system-ppc -machine accel=kvm -cdrom debian-9.0-powerpc-NETINST-1.iso \ -boot d -M mac99,via=pmu -m 256 -prom-env 'boot-args=-v' -M g3beige: hangs on yaboot (keyboard unresponsive?) ./qemu-system-ppc -machine accel=kvm -cdrom debian-9.0-powerpc-NETINST-1.iso \ -boot d -m 256 -prom-env 'boot-args=-v'MacOS 9: -M mac99[,via=cuda]: hangs on nanokernel initialisation ./qemu-system-ppc -machine accel=kvm -cdrom MacOS921.iso -boot d \ -m 256 -prom-env 'boot-args=-v' -prom-env 'vga-ndrv?=false' -M mac99,via=pmu: hangs on MacOS grey background screen (requires -prom-env 'vga-ndrv?=false' - why?) ./qemu-system-ppc -machine accel=kvm -cdrom MacOS921.iso -boot d \ -M mac99,via=pmu -m 256 -prom-env 'boot-args=-v' -prom-env 'vga-ndrv?=false'The key thing is that there are two variables here: QEMU and the kernel. I did report some breakages in the kernel 4.x timeframe which were eventually fixed, so it might make sense to use the same kernel as luigi as a starting point with latest QEMU git, and then work backwards towards QEMU 3 and see if you can find the point at which things stop working.ATB,Mark.
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