Re: [PATCH] target/ppc: Fix e6500 boot

[address@hidden]

>From: "Fabiano Rosas" farosas@linux.ibm.com
>To: "mario@locati.it" mario@locati.it, clg@kaod.org
>Cc: danielhb413@gmail.com, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, 
>balaton@eik.bme.hu
>Date: Mon, 27 Dec 2021 17:05:46 -0300
>Subject: Re: [PATCH] target/ppc: Fix e6500 boot
>
>"mario@locati.it" <mario@locati.it> writes:
> 
>> I have updated  the guest VM but I get exactly the same result except that 
>> now I have libc-2.33.so installed.
>> 
>> [...]
>> VFS: Mounted root (ext4 filesystem) on device 254:0.
>> devtmpfs: mounted
>> Freeing unused kernel image (initmem) memory: 468K
>> This architecture does not have kernel memory protection.
>> Run /sbin/init as init process
>> random: fast init done
>> systemd[1]: illegal instruction (4) at 3fff8b7e615c nip 3fff8b7e615c lr 
>> 3fff8b7e613c code 1 in libc-2.33.so[3fff8b799000+1fe000]
>> systemd[1]: code: 60000000 38600006 9122b7d0 4801bf19 60000000 60000000 
>> 8122b7d0 2c090004 
>> systemd[1]: code: 40820014 39200005 60000000 9122b7d0 <00000000> 60000000 
>> 8122b7d0 2c090005 
>> Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004
>> Rebooting in 180 seconds..
> 
>Can you make the hdd_debian_ppc64_new.img available? We won't be able to
>reproduce the exact same scenario because we can't run KVM, but if it
>boots with TCG we can at least look around the code that is failing to
>see if it gives us any clues.


Sure, you may download the hdd of the VM I am using on the NXP T2080RDB from
https://repo.powerprogress.org/t2080rdb/qemu/hdd_debian_sid_ppc64.qcow2

I have compressed the original raw disk (18.8GB) into a smaller qcow2 (3.8GB), 
I cannot get a smaller image sorry.

Use the following kernel to launch it
https://repo.powerprogress.org/t2080rdb/qemu/uImage_5.16-rc6

No matter which video output I try, but on my ubuntu 20.04 x86_64 I cannot get 
X11 working, so to launch qemu I use
qemu-system-ppc64 -accel tcg -M ppce500 -cpu e6500 -smp 4 -m 2G -vga none 
-nographic -net nic -net user -drive 
format=qcow2,file=hdd_debian_sid_ppc64.qcow2,index=0,if=virtio -kernel 
uImage_5.16-rc6 -append "root=/dev/vda rw"
that do now work
qemu-system-ppc64 -accel tcg -M ppce500 -cpu e5500 -smp 4 -m 2G -vga none 
-nographic -net nic -net user -drive 
format=qcow2,file=hdd_debian_sid_ppc64.qcow2,index=0,if=virtio -kernel 
uImage_5.16-rc6 -append "root=/dev/vda rw"
that works, the system sees e5500 cores, whereas running it on the devkit, the 
system see the host e6500 cores