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

[Cédric Le Goater]

Hello Luigi,

On 03/22/2017 06:49 PM, luigi burdo wrote:

> i have the 4.11rc1 . onfedora 25 ppc 64 on both machine Qoriq and on G5Quad.
> 
> On the 2.8 this issue isnt presentbut
> I did the test o Qoriq  e5500 a book3e processor and on 2.8 if i made:
> 
> qemu-system-ppc64 --enable-kvm the true result is:
> qemu-system-ppc64: Unable to find CPU definition: host
> 
> on qemu 2.9 rc1
> 
> ./qemu-system-ppc64 --enable-kvm i have :
> qemu-system-ppc64: KVM and IRQ_XICS capability must be present for in-kernel 
> XICS

The default machine for qemu-system-ppc64 is pseries. 

The error message for QEMU 2.8 means that it fails to initialize 
the machine in ppc_cpu_parse_features() which is a bit late. 
For QEMU 2.9, it fails at the right beginning in xics_system_init(), 
before the CPUs are initialized, which is better, I think.

I admit the message is not very clear, but the host kernel is 
using a dev config.

> On Qoriq if i pass the -cpu e500 (normal thing) all is working right qemu 
> 2.9rc1 
> all boot and so and so.

but you must be changing the machine right ? 

> On G5 the -cpu variable dont fix the issue.

with which machine ? 


> I can build a new kernel release , usually mine dont have xics enabled 
> because G5 
> dont have that feature, if needed i can enable it for testing.**

Yes that would be interesting. 

Thanks,

C. 

> 
> Hope my english is understandable.
> 
> ciao
> 
> Luigi
> 
> 
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> *Da:* Qemu-ppc <address@hidden> per conto di Cédric Le Goater <address@hidden>
> *Inviato:* mercoledì 22 marzo 2017 18.29
> *A:* Thomas Huth; Bug 1674925; address@hidden
> *Cc:* address@hidden
> *Oggetto:* Re: [Qemu-ppc] [Qemu-devel] [Bug 1674925] Re: Qemu PPC64 kvm no 
> display if --device virtio-gpu-pci is selected
>  
> On 03/22/2017 03:15 PM, Thomas Huth wrote:
>> On 22.03.2017 14:35, luigiburdo wrote:
>>> Hi Thomas with 2.9 rc1 i have this with --enable-kvm
>>>
>>> emu-system-ppc64 --enable-kvm
>>> qemu-system-ppc64: KVM and IRQ_XICS capability must be present for 
>>> in-kernel XICS
>>>
>>> and the qemu dont run.
>> 
>> Does it exit, or just hang afterwards? Was this with or without --device
>> virtio-gpu-pci option? Do you get any output if you run QEMU with
>> "-nographic" instead?
> 
> I guess this is an issue with the host kernel. Which one are you running ?
> 
> C.
> 
>