Re: e6500 stvx instruction

[BALATON Zoltan]

Hello,

On Sun, 4 Jul 2021, mario@locati.it wrote:
> I tested QEMU 6.0 on a real e6500 with KVM enabled and it fails.
> Not just that, it enter and infinite loop of kernel errors that completely hang 
> the system so I have to hardware reset.
> At the following address you may find the serial output from my NXP T2080RDB
> https://repo.powerprogress.org/t2080rdb/serial_output_real_e6500_NXP_T2080RDB_qemu_kvm.txt
> I included in the serial output the compilation of QEMU 6.0 so you may check 
> what was enabled.
> I run QEMU using the following command
> sudo qemu-system-ppc64 -enable-kvm -M ppce500 -cpu e6500 \
> -m 1G -vga none -nographic -kernel book3e_e6500_kernel_5.12.10 \
> -append "root=/dev/vda1 rw" -drive \
> format=qcow2,file=hdd_debian_sid_ppc64_basic.qcow2,index=0,if=virtio
> The kernels, QCOW2 HDD image are all available from
> https://repo.powerprogress.org/t2080rdb/

Please cut non-relevant old mails when replying and refrain from top 
posting if possible. That way it's more readable and clearer what's 
relevant.

I'm afraid I can't help because I don't know anything about PPC KVM. But 
I'm not that surprised it's not working becuase PPC Linux is not much used 
these days and what activity is there is mainly for PPC64LE on server 
CPUs. Probably it was a long time ago anybody tried BookE PPC so it could 
be it has bitrotten if it ever worked for e6500. I'm surprised it's 
working at all because I thought BookE KVM was dropped from latest 
kernels. It's not clear to me what the warnings you got mean, maybe look 
in system logs if there are more details there and ask on the appropriate 
Linux list. I'm not sure which is that but this looks like it might be the 
place: http://vger.kernel.org/vger-lists.html#kvm-ppc

Regards,
BALATON Zoltan