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Tsirkin" , Paolo Bonzini , Gert Wollny , qemu-devel@nongnu.org, Gurchetan Singh , Alyssa Ross , Roger Pau =?utf-8?Q?Monn=C3=A9?= , Alex Deucher , Stefano Stabellini , Christian =?utf-8?Q?K=C3=B6nig?= , Xenia Ragiadakou , Pierre-Eric Pelloux-Prayer , Honglei Huang , Julia Zhang , Chen Jiqian , Rob Clark , Yiwei Zhang , Sergio Lopez Pascual Subject: Re: [PATCH v5 0/8] Support virtio-gpu DRM native context In-Reply-To: <20250119220050.15167-1-dmitry.osipenko@collabora.com> (Dmitry Osipenko's message of "Mon, 20 Jan 2025 01:00:42 +0300") References: <20250119220050.15167-1-dmitry.osipenko@collabora.com> User-Agent: mu4e 1.12.8; emacs 29.4 Date: Wed, 22 Jan 2025 17:00:01 +0000 Message-ID: <87jzamn5ri.fsf@draig.linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::330; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x330.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Dmitry Osipenko 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 i= t. > 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=3D9sFP_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=3Don (gtk,gl=3Don also came up but handled window resizing poorly) =20=20 KVM Guest Aarch64 Trixie mesa @ main/d27748a76f7dd9236bfcf9ef172dc13b8c0e170f -Dvulkan-drivers=3Dvirtio,amd -Dgallium-drivers=3Dvirgl,radeonsi -Damdgpu= -virtio=3Dtrue However when I ran vulkan-info --summary KVM faulted with: debian-trixie login: error: kvm run failed Bad address PC=3D0000ffffb9aa1eb0 X00=3D0000ffffba0450a4 X01=3D0000aaaaf7f32400 X02=3D000000000000013c X03=3D0000ffffba045098 X04=3D0000aaaaf7f3253c X05=3D0000ffffba0451d4 X06=3D00000000c0016900 X07=3D000000000000000e X08=3D0000000000000014 X09=3D00000000000000ff X10=3D0000aaaaf7f32500 X11=3D0000aaaaf7e4d028 X12=3D0000aaaaf7edbcb0 X13=3D0000000000000001 X14=3D000000000000000c X15=3D0000000000007718 X16=3D0000ffffb93601f0 X17=3D0000ffffb9aa1dc0 X18=3D00000000000076f0 X19=3D0000aaaaf7f31330 X20=3D0000aaaaf7f323f0 X21=3D0000aaaaf7f235e0 X22=3D000000000000004c X23=3D0000aaaaf7f2b5e0 X24=3D0000aaaaf7ee0cb0 X25=3D00000000000000ff X26=3D0000000000000076 X27=3D0000ffffcd2b18a8 X28=3D0000aaaaf7ee0cb0 X29=3D0000ffffcd2b0bd0 X30=3D0000ffffb86c8b98 SP=3D0000ffffcd2b0bd0 PSTATE=3D20001000 --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=3Don 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 > --=20 Alex Benn=C3=A9e Virtualisation Tech Lead @ Linaro