[FSL P50x0] KVM HV doesn't work anymore

[Christian Zigotzky]

On 15 May 2021 at 12:08pm Christophe Leroy wrote:
>
>
> Le 15/05/2021 à 11:48, Christian Zigotzky a écrit :
>> Hi All,
>>
>> I bisected today [1] and the bisecting itself was OK but the 
>> reverting of the bad commit doesn't solve the issue. Do you have an 
>> idea which commit could be resposible for this issue? Maybe the 
>> bisecting wasn't successful. I will look in the kernel git log. Maybe 
>> there is a commit that affected KVM HV on FSL P50x0 machines.
>
> If the uImage doesn't load, it may be because of the size of uImage.
>
> See https://github.com/linuxppc/issues/issues/208
>
> Is there a significant size difference with and without KVM HV ?
>
> Maybe you can try to remove another option to reduce the size of the 
> uImage.
I tried it but it doesn't solve the issue. The uImage works without KVM 
HV in a virtual e5500 QEMU machine.

-Christian
>
> Or if you are using gzipped uImage you can try with an lzma uImage. 
> You can find a way to get an lzma uImage here: 
> https://github.com/linuxppc/issues/issues/208#issuecomment-477479951
>
> Christophe
>
>>
>> Thanks,
>> Christian
>>
>> [1] 
>> https://forum.hyperion-entertainment.com/viewtopic.php?p=53209#p53209
>>
>> On 14 May 2021 at 10:10 am, Christian Zigotzky wrote:
>>> Hi All,
>>>
>>> The RC1 of kernel 5.13 doesn't boot in a virtual e5500 QEMU machine 
>>> with KVM HV anymore. I see in the serial console that the uImage 
>>> doesn't load. I use the following QEMU command for booting:
>>>
>>> qemu-system-ppc64 -M ppce500 -cpu e5500 -enable-kvm -m 1024 -kernel 
>>> uImage-5.13 -drive 
>>> format=raw,file=MintPPC32-X5000.img,index=0,if=virtio -netdev 
>>> user,id=mynet0 -device e1000,netdev=mynet0 -append "rw 
>>> root=/dev/vda" -device virtio-vga -device virtio-mouse-pci -device 
>>> virtio-keyboard-pci -device pci-ohci,id=newusb -device 
>>> usb-audio,bus=newusb.0 -smp 4
>>>
>>> The kernel boots without KVM HV.
>>>
>>> Have you already tested KVM HV with the kernel 5.13?
>>>
>>> Thanks,
>>> Christian
>>>
>>>