Re: [Qemu-devel] [Qemu-ppc] [Bug 1674925] Re: Qemu PPC64 kvm no display if --device virtio-gpu-pci is selected

[Cédric Le Goater]

On 03/24/2017 12:31 PM, luigi burdo wrote:
> Hi Cèdric,
> 
> first of all thanks for your relpy.
> 
> 
> 
> 
>>I have some difficulty sorting out what is going on and what
>>could be considered a regression :/ you are reporting many
>>issues at the same time with a home made kernel.
> 
>>Could you please use the kernel shipped with the distro to
>>start with ?
> 
> I can do it and report.
> 
>> yes usually with 2.8 i  boot  the VM without issue on G5 Quad  with the 
>> option
>> -M  pseries from 2.1 to 2.5 with kvm-pr enabled.
>> i did the tests and with all pseries now on 2.9 i have the same issue.
>> example:
>> qemu-system-ppc64 --enable-kvm -cpu 970fx_v2.0 -m 1024 -M pseries-2.1
>> qemu-system-ppc64: KVM and IRQ_XICS capability must be present for in-kernel 
>> XICS
> 
>>This error message is because your host kernel lacks in-kernel XICS,
>>but you are saying that was not an issue with QEMU-2.8. Correct ? 
> 
> Exactly i have the same on Qoriq too.

I will look at the problem but I think you should recompile your kernel 
with in-kernel XICS or use the kernel shipped by the distro you use.
 
>>Here is the command line I used on a 17.04 host :
>>qemu-system-ppc64 -M pseries-2.[1-8],accel=kvm,kvm-type=PR -cpu 970fx_v2.0 -m 
>>1024 -nographic
> 
> I will try your same command line and see what will exit on me.
> I cant use qemu on 17.04 host because there is no more support 
> for PPC32, PPC64 dead line is 16.10 and last working version
> of qemu on PPC  is 2.6.1  i dint try 2.9 there if needed i can 
> do i have ubuntu mate 17.04 installed too.

Also please try with a core supported by pseries : 

    /* 970 */
    "970_v2.2",

    /* 970MP variants */
    "970MP_v1.0",
    "970mp_v1.0",
    "970MP_v1.1",
    "970mp_v1.1",

you should be fine with these.

Thanks,

C.


>>Did we introduce a regression in compatibility in QEMU 2.9 ?  or 
> Im facing many issue on this last update im try to help how i can before all 
> come upstream.
> i like really much qemu. i can help in testing on PPC64 Be if need with my hw.
>>was it bogus before ? That needs a little digging. I did not work
>>on that part.
> dont worry you did much 
> 
> Thanks 
> Luigi 
> 
> 
>