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id = 1634
title = "[8.0.0] Broken snapshot replay support on PowerPC"
state = "closed"
created_at = "2023-04-30T00:11:41.106Z"
closed_at = "2023-11-12T16:18:09.169Z"
labels = ["accel: TCG", "hostos: macOS", "target: ppc"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/1634"
host-os = "macOS 13.3.1"
host-arch = "x86_64"
qemu-version = "8.0.0"
guest-os = "Bare metal hello world"
guest-arch = "PowerPC e500mc (Book-E)"
description = """QEMU 8.0.0 can no longer replay snapshots on PowerPC e500mc (Book-E) architecture. The issue is caused by https://gitlab.com/qemu-project/qemu/-/commit/c4b075318eb1e87de5fc942e6b987694a0e677e1, reverting this commit solves the issue."""
reproduce = """1. Run bare metal example from the attachment with the first command-line to create snapshot.
2. Run bare metal example from the attachment with the second command-line to replay snapshot."""
additional = """Any e500mc example would do really. I was unable to find a prebuilt Linux distribution, thus just wrote a minimal sample that prints hello world to UART: [ppc-e500.zip](/uploads/f9328c4b8355a92877d784661aa69fa4/ppc-e500.zip)
Log output:
```
% qemu-system-ppc -cpu e500mc -M ppce500 -m 128M -net none -icount 1,rr=record,rrfile=main.bin,rrsnapshot=init -drive file=empty.qcow2,if=none,id=rr -display none -kernel hello.elf -serial stdio
Hello world
qemu-system-ppc: terminating on signal 2 from pid 4505 (<unknown process>)
% qemu-system-ppc -cpu e500mc -M ppce500 -m 128M -net none -icount 1,rr=replay,rrfile=main.bin,rrsnapshot=init -drive file=empty.qcow2,if=none,id=rr -display none -kernel hello.elf -serial stdio
qemu-system-ppc: Missing random event in the replay log
```"""
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