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Re: [Qemu-devel] [Qemu-ppc] [Bug 1674925] Re: Qemu PPC64 kvm no display

From: luigiburdo
Subject: Re: [Qemu-devel] [Qemu-ppc] [Bug 1674925] Re: Qemu PPC64 kvm no display if --device virtio-gpu-pci is selected
Date: Fri, 24 Mar 2017 11:31:03 -0000

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 

>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.

>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.

>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


You received this bug notification because you are a member of qemu-
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  Qemu PPC64 kvm no display if  --device virtio-gpu-pci is selected

Status in QEMU:

Bug description:
  i did many tests on qemu 2.8 on my BE machines and i found an issue that i 
think was need to be reported

  Test Machines BE 970MP

  if i setup qemu with

  qemu-system-ppc64 -M 1024 --display sdl(or gtk),gl=on --device virtio-
  gpu-pci,virgl --enable-kvm and so and so

  result is doubled window one is vga other is virtio-gpu-pci without
  any start of the VM . pratically i dont have any output of openbios
  and on the virtual serial output

  the same issue i found is if i select:
  qemu-system-ppc64 -M 1024 --display gtk(or sdl) --device virtio-gpu-pci 
--enable-kvm and so and so

  i had been try to change all the -M types of all kind of pseries without any 
positive result.


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