Re: [Qemu-ppc] [Qemu-devel] [PATCH v3 0/2] 40p: fix PCI interrupt routing

[Mark Cave-Ayland]

On 18/09/2018 22:12, Mark Cave-Ayland wrote:

> Roman, can you reproduce this locally at all? My setup is nothing
> special, just Debian Stretch on amd64.

I've just realised that because this bug is still dependent upon queued 
patches, it
would make sense for me to push a slightly modified version of David's 
ppc-for-3.1
branch to github to help reproduce the issue. Below are the instructions on how 
to
reproduce the bug locally:


1) Grab the 40p test image from 
http://www.juneau-lug.org/zImage.initrd.sandalfoot

2) Fetch my slightly-modified ppc-for-3.1 branch from
https://github.com/mcayland/qemu/tree/ppc-for-3.1-regression

3) Build QEMU with --enable-debug:

./configure --target-list=ppc-softmmu --enable-debug
make

4) Boot the 40p test image:

./ppc-softmmu/qemu-system-ppc -cdrom zImage.initrd.sandalfoot -boot d -M 40p

You will see that the test image fails at the end of boot with messages like 
this:

Bad inittab entry:
Bad inittab entry:
No more tasks for init -- sleeping forever

5) Now remove the "target/ppc: add external PID support" patch from the above 
branch:

git checkout HEAD~1
make

6) Boot the 40p test image again:

./ppc-softmmu/qemu-system-ppc -cdrom zImage.initrd.sandalfoot -boot d -M 40p

You will see that the test image now boots successfully to the "Please press 
Enter to
activate this console" message.


ATB,

Mark.