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From: "Alex Bennée" <alex.bennee@linaro.org>
To: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: "Akihiko Odaki" <akihiko.odaki@daynix.com>,
	"Huang Rui" <ray.huang@amd.com>,
	"Marc-André Lureau" <marcandre.lureau@redhat.com>,
	"Philippe Mathieu-Daudé" <philmd@linaro.org>,
	"Gerd Hoffmann" <kraxel@redhat.com>,
	"Michael S . Tsirkin" <mst@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Gert Wollny" <gert.wollny@collabora.com>,
	qemu-devel@nongnu.org,
	"Gurchetan Singh" <gurchetansingh@chromium.org>,
	"Alyssa Ross" <hi@alyssa.is>,
	"Roger Pau Monné" <roger.pau@citrix.com>,
	"Alex Deucher" <alexander.deucher@amd.com>,
	"Stefano Stabellini" <stefano.stabellini@amd.com>,
	"Christian König" <christian.koenig@amd.com>,
	"Xenia Ragiadakou" <xenia.ragiadakou@amd.com>,
	"Pierre-Eric Pelloux-Prayer" <pierre-eric.pelloux-prayer@amd.com>,
	"Honglei Huang" <honglei1.huang@amd.com>,
	"Julia Zhang" <julia.zhang@amd.com>,
	"Chen Jiqian" <Jiqian.Chen@amd.com>,
	"Rob Clark" <robdclark@gmail.com>,
	"Yiwei Zhang" <zzyiwei@chromium.org>,
	"Sergio Lopez Pascual" <slp@redhat.com>
Subject: Re: [PATCH v5 0/8] Support virtio-gpu DRM native context
Date: Wed, 22 Jan 2025 17:00:01 +0000	[thread overview]
Message-ID: <87jzamn5ri.fsf@draig.linaro.org> (raw)
In-Reply-To: <20250119220050.15167-1-dmitry.osipenko@collabora.com> (Dmitry Osipenko's message of "Mon, 20 Jan 2025 01:00:42 +0300")

Dmitry Osipenko <dmitry.osipenko@collabora.com> writes:

> This patchset adds DRM native context support to VirtIO-GPU on Qemu.
>
> Contarary to Virgl and Venus contexts that mediates high level GFX APIs,
> DRM native context [1] mediates lower level kernel driver UAPI, which
> reflects in a less CPU overhead and less/simpler code needed to support it.
> DRM context consists of a host and guest parts that have to be implemented
> for each GPU driver. On a guest side, DRM context presents a virtual GPU as
> a real/native host GPU device for GL/VK applications.
>
> [1] https://www.youtube.com/watch?v=9sFP_yddLLQ
>
> Today there are four known DRM native context drivers existing in a wild:
>
>   - Freedreno (Qualcomm SoC GPUs), completely upstreamed
>   - AMDGPU, mostly merged into upstreams

I tried my AMD system today with:

Host:
  Aarch64 AVA system
  Trixie
  virglrenderer @ v1.1.0/99557f5aa130930d11f04ffeb07f3a9aa5963182
  -display sdl,gl=on (gtk,gl=on also came up but handled window resizing
  poorly)
  
KVM Guest

  Aarch64
  Trixie
  mesa @ main/d27748a76f7dd9236bfcf9ef172dc13b8c0e170f
  -Dvulkan-drivers=virtio,amd -Dgallium-drivers=virgl,radeonsi -Damdgpu-virtio=true

However when I ran vulkan-info --summary KVM faulted with:

  debian-trixie login: error: kvm run failed Bad address
   PC=0000ffffb9aa1eb0 X00=0000ffffba0450a4 X01=0000aaaaf7f32400
  X02=000000000000013c X03=0000ffffba045098 X04=0000aaaaf7f3253c
  X05=0000ffffba0451d4 X06=00000000c0016900 X07=000000000000000e
  X08=0000000000000014 X09=00000000000000ff X10=0000aaaaf7f32500
  X11=0000aaaaf7e4d028 X12=0000aaaaf7edbcb0 X13=0000000000000001
  X14=000000000000000c X15=0000000000007718 X16=0000ffffb93601f0
  X17=0000ffffb9aa1dc0 X18=00000000000076f0 X19=0000aaaaf7f31330
  X20=0000aaaaf7f323f0 X21=0000aaaaf7f235e0 X22=000000000000004c
  X23=0000aaaaf7f2b5e0 X24=0000aaaaf7ee0cb0 X25=00000000000000ff
  X26=0000000000000076 X27=0000ffffcd2b18a8 X28=0000aaaaf7ee0cb0
  X29=0000ffffcd2b0bd0 X30=0000ffffb86c8b98  SP=0000ffffcd2b0bd0
  PSTATE=20001000 --C- EL0t
  QEMU 9.2.50 monitor - type 'help' for more information
  (qemu) quit

Which looks very much like the PFN locking failure. However booting up
with venus=on instead works. Could there be any differences in the way
device memory is mapped in the two cases?

>   - Intel (i915), merge requests are opened
>   - Asahi (Apple SoC GPUs), WIP status
>
<snip>

-- 
Alex Bennée
Virtualisation Tech Lead @ Linaro


  parent reply	other threads:[~2025-01-22 17:00 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-01-19 22:00 [PATCH v5 0/8] Support virtio-gpu DRM native context Dmitry Osipenko
2025-01-19 22:00 ` [PATCH v5 1/8] ui/sdl2: Restore original context after new context creation Dmitry Osipenko
2025-01-19 22:00 ` [PATCH v5 2/8] ui/sdl2: Implement dpy dmabuf functions Dmitry Osipenko
2025-01-19 22:00 ` [PATCH v5 3/8] virtio-gpu: Handle virgl fence creation errors Dmitry Osipenko
2025-01-19 22:00 ` [PATCH v5 4/8] virtio-gpu: Support asynchronous fencing Dmitry Osipenko
     [not found]   ` <87cyghr3l2.fsf@draig.linaro.org>
2025-01-22 12:18     ` Dmitry Osipenko
2025-01-19 22:00 ` [PATCH v5 5/8] virtio-gpu: Support DRM native context Dmitry Osipenko
2025-01-19 22:00 ` [PATCH v5 6/8] ui/sdl2: Don't disable scanout when display is refreshed Dmitry Osipenko
2025-01-19 22:00 ` [PATCH v5 7/8] ui/gtk: " Dmitry Osipenko
2025-01-19 22:00 ` [PATCH v5 8/8] docs/system: Expand the virtio-gpu documentation Dmitry Osipenko
     [not found]   ` <c2e1c362-5d02-488e-b849-d0b14781a60f@daynix.com>
     [not found]     ` <87ikq9r7wj.fsf@draig.linaro.org>
2025-01-21  4:26       ` Akihiko Odaki
2025-01-26 18:06         ` Dmitry Osipenko
2025-01-27  4:57           ` Akihiko Odaki
2025-02-02 22:08             ` Dmitry Osipenko
2025-02-03  5:31               ` Akihiko Odaki
2025-02-05 17:40                 ` Dmitry Osipenko
2025-02-06  5:41                   ` Akihiko Odaki
2025-02-09 21:03                     ` Dmitry Osipenko
2025-02-13  4:32                       ` Akihiko Odaki
2025-02-18  6:27                         ` Dmitry Osipenko
2025-02-18  6:35                           ` Dmitry Osipenko
2025-02-27  6:40                           ` Akihiko Odaki
     [not found] ` <871pwxqyr3.fsf@draig.linaro.org>
2025-01-22 12:25   ` [PATCH v5 0/8] Support virtio-gpu DRM native context Dmitry Osipenko
2025-01-22 17:00 ` Alex Bennée [this message]
2025-01-23 11:23   ` Dmitry Osipenko
2025-01-23 11:58     ` Alex Bennée
2025-01-23 12:37       ` Dmitry Osipenko
2025-01-27 14:50         ` Alex Bennée

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