From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B1939C02190 for ; Fri, 31 Jan 2025 17:14:48 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tduau-00082b-Lt; Fri, 31 Jan 2025 12:14:16 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tduas-00082S-Qx for qemu-devel@nongnu.org; Fri, 31 Jan 2025 12:14:14 -0500 Received: from sender4-pp-f112.zoho.com ([136.143.188.112]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tduaq-0007p2-TR for qemu-devel@nongnu.org; Fri, 31 Jan 2025 12:14:14 -0500 ARC-Seal: i=1; a=rsa-sha256; t=1738343631; cv=none; d=zohomail.com; s=zohoarc; b=aUGzWu3zTa2qPQB4f6NZT5qP24CIBnyC8aveXWB62nQJPG7c1feRO4OWI2u1vRKFpiQ0HEq/v0ILPa5l0U8yKlpYoMQfutbxnaM9lSFvYFBX9zopVOGZLkUoRbAsIsNxUDNNlq4n3CMdTQqjw+GlAlE+fy7Kfwd6sd+9WI+8xOE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1738343631; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=kcvx+TEky8VUdORqbg7FPq96LuyRwD3bmaLUo7JbDBw=; b=FPy0MAmA5Lh+E+i+0/j8VtH5enxmva3vBOY1vLjo1X6ET5U4Q/70UejJH51xK9F+gCY8E1V3/7A8sPU+IxIRw4t6eiUj7UuivR+LN1eQ5hdvCVcA/ps0OZVqb2XuF+SZjBtuSZyxNRI7v+Tbzdhod+oCH/nKpAOUkNpZMuxP8dc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=dmitry.osipenko@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1738343631; s=zohomail; d=collabora.com; i=dmitry.osipenko@collabora.com; h=Message-ID:Date:Date:MIME-Version:Subject:Subject:To:To:Cc:Cc:References:From:From:In-Reply-To:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To; bh=kcvx+TEky8VUdORqbg7FPq96LuyRwD3bmaLUo7JbDBw=; b=Ol2fj9bCXh5T5JQcXeJO06ZKMWtCTWkd4p5eXEBvf0BLCVr9F0jUYu0A1/Xl2EAM MOIraV7uoWcIqO4mo2UDAC5bg+1nEeZlXq9intzO8j3BT5u87v03qavOxM8LTcNakNr 1zzHuwWkKbimrE/acdIvCdwmMWxnXcpjdD1xxmXY= Received: by mx.zohomail.com with SMTPS id 173834362508967.24507544752475; Fri, 31 Jan 2025 09:13:45 -0800 (PST) Message-ID: <18bb7aa3-93cc-4a38-9641-31e6e988c64e@collabora.com> Date: Fri, 31 Jan 2025 20:13:35 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 00/10] Support virtio-gpu DRM native context To: =?UTF-8?Q?Alex_Benn=C3=A9e?= Cc: Akihiko Odaki , Huang Rui , =?UTF-8?Q?Marc-Andr=C3=A9_Lureau?= , =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= , Gerd Hoffmann , "Michael S . Tsirkin" , Paolo Bonzini , Gert Wollny , qemu-devel@nongnu.org, Gurchetan Singh , Alyssa Ross , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= , Alex Deucher , Stefano Stabellini , =?UTF-8?Q?Christian_K=C3=B6nig?= , Xenia Ragiadakou , Pierre-Eric Pelloux-Prayer , Honglei Huang , Julia Zhang , Chen Jiqian , Rob Clark , Yiwei Zhang , Sergio Lopez Pascual References: <20250126201121.470990-1-dmitry.osipenko@collabora.com> <87cyg844fr.fsf@draig.linaro.org> From: Dmitry Osipenko Content-Language: en-US In-Reply-To: <87cyg844fr.fsf@draig.linaro.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ZohoMailClient: External Received-SPF: pass client-ip=136.143.188.112; envelope-from=dmitry.osipenko@collabora.com; helo=sender4-pp-f112.zoho.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, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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 On 1/27/25 19:17, Alex Bennée wrote: > 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 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 DRM native context drivers existing in a wild: >> >> - Freedreno (Qualcomm SoC GPUs), completely upstreamed >> - AMDGPU, completely upstreamed > > Well good news and bad news. > > I can verify that AMD native context works when I run my Aarch64 guest > on my Aarch64 host with -accel TCG (therefor avoiding KVM all together). > I get potato frame rates though (~150FPS) although I suspect that is > because the PCI errata workaround. > > When it comes to graphics memory allocation is there anything I can do > to force all allocations to be very aligned? Is this in the purview of > the AMD drm drivers or TTM itself? All GPU allocations should be aligned to a page size. Alignment is specified by AMD driver. I don't expect that alignment is the problem. What's the size of your host and guest pages? -- Best regards, Dmitry