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id = 2523
title = "[9.0.2] PPC: snapshot replay freeze on PowerPC"
state = "opened"
created_at = "2024-08-21T12:21:18.030Z"
closed_at = "n/a"
labels = ["accel: TCG", "icount", "target: ppc"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2523"
host-os = "Linux Mint 21.1"
host-arch = "x86_64"
qemu-version = "9.0.2"
guest-os = "Bare metal hello world"
guest-arch = "PowerPC e500mc (Book-E)"
description = """Qemu 9.0.2 cannot replay snapshots on PowerPC e500mc (Book-E) architecture. When I try to do this, the program freezes."""
reproduce = """1. Run bare metal example from the attachment with the first command-line to create snapshot. Then end it using ctrl+c.
2. Run bare metal example from the attachment with the second command-line to replay snapshot. Running will freeze, use ctrl+c."""
additional = """e500mc example that prints Hello World: [ppc-e500.zip](/uploads/ef9ce53abc3f17490d4894c041956038/ppc-e500.zip)
Log output:
```
% qemu-system-ppc -cpu e500 -M ppce500 -kernel hello.elf -display none -serial stdio -icount 1,rr=record,rrfile=main.bin,rrsnapshot=init -drive file=empty.qcow2,if=none,id=rr
Hello world
qemu-system-ppc: terminating on signal 2
% qemu-system-ppc -cpu e500 -M ppce500 -kernel hello.elf -display none -serial stdio -icount 1,rr=replay,rrfile=main.bin,rrsnapshot=init -drive file=empty.qcow2,if=none,id=rr
qemu-system-ppc: terminating on signal 2
qemu-system-ppc: Playback shouldn't have to iowait (insn total 0/68 left, event 4 is EVENT_INSTRUCTION)
zsh: IOT instruction (core dumped) qemu-system-ppc -cpu e500 -M ppce500 -kernel hello.elf -display none -serial
```
`Playback shouldn't have to iowait` error caused by 1f881ea4a444ef36a8b6907b0b82be4b3af253a2 commit, see https://gitlab.com/qemu-project/qemu/-/issues/2524"""
|