If one continues with the iso, and installs the OS in the guest, the rebooting of the guest from within the guest OS too causes qemu to exit fatally. So, one can run 'systemctl reboot' or 'reboot' within the guest OS and see qemu crash (immediately after SLOF prints version, etc. as part of the reboot sequence, as described before).
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1828507 Title: qemu-system-ppc64 smp crash on manual reset Status in QEMU: New Bug description: Host Environment: x86_64 Linux v5.0.2 QEMU emulator version 4.0.50 (v4.0.0-354-g812b835fb4) SLOF: Build Date = Jan 14 2019 18:00:39 FW Version = git-a5b428e1c1eae703 Problem: Qemu crash immediately after a manual reset (this is not the initial reset which launches the guest). Steps: 1. Download Debian ppc64el mini.iso: http://ftp.debian.org/debian/dists/sid/main/installer-ppc64el/current/images/netboot/mini.iso 2. Run qemu on the host. Ensure that it runs with more than one CPUs. With a single CPU, I was unable to reproduce the crash. qemu-system-ppc64 -M pseries -cpu power9 -smp 2 -m 512 -cdrom mini.iso 3. SLOF prints the version info on the serial device, and proceeds to boot. 4. After a few seconds, the GRUB menu appears on the VGA screen. 5. Select one of the install options (I have tested with Default and Expert), and wait for the Debian's text-mode installer (blue-gray-red) screen to appear. 6. Click Machine->Reset (or enter system_reset on the qemu monitor). 7. Notice that, on the serial device, SLOF has printed the version info. That is, the system has reset and is attempting to boot again. 8. On the host cmd prompt, qemu dies after printing this fatal error and spewing the contents of the CPU registers: qemu: fatal: Trying to deliver HV exception (MSR) 70 with no HV support <CPU contents> (See attached out.txt for details) Aborted (core dumped) The HV exception is either (a) 70 = HISI, which occurs when NIP contains an outright bogus or inaccessible value, or (b) 69 = HDSI, which occurs when NIP happens to contain a somewhat saner value, and the cpu attempts to run the instruction at that address. The exception can occur on either of the CPUs. It occurs when qemu is running the SLOF code. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1828507/+subscriptions
