{"id":2197455,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2197455/?format=json","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.0/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260217214928.2970885-12-dmitry.osipenko@collabora.com>","date":"2026-02-17T21:49:20","name":"[v18,11/19] virtio-gpu: Support DRM native context","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"7dc5f262c5f79b6b3ede80ae25795de0b25b2225","submitter":{"id":83453,"url":"http://patchwork.ozlabs.org/api/1.0/people/83453/?format=json","name":"Dmitry Osipenko","email":"dmitry.osipenko@collabora.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260217214928.2970885-12-dmitry.osipenko@collabora.com/mbox/","series":[{"id":492488,"url":"http://patchwork.ozlabs.org/api/1.0/series/492488/?format=json","date":"2026-02-17T21:49:09","name":"Support virtio-gpu DRM native context and MAP_FIXED API","version":18,"mbox":"http://patchwork.ozlabs.org/series/492488/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2197455/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=collabora.com header.i=dmitry.osipenko@collabora.com\n header.a=rsa-sha256 header.s=zohomail header.b=NfR9GEAg;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fFtgS115nz1xwC\n\tfor ; Wed, 18 Feb 2026 08:53:24 +1100 (AEDT)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1vsT0F-0000yx-S7; Tue, 17 Feb 2026 16:53:07 -0500","from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1vsSzt-0000WJ-3L\n for qemu-devel@nongnu.org; Tue, 17 Feb 2026 16:52:48 -0500","from sender4-pp-f112.zoho.com ([136.143.188.112])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1vsSzo-0001Vq-HX\n for qemu-devel@nongnu.org; Tue, 17 Feb 2026 16:52:43 -0500","by mx.zohomail.com with SMTPS id 1771365140848480.6195102784808;\n Tue, 17 Feb 2026 13:52:20 -0800 (PST)"],"ARC-Seal":"i=1; a=rsa-sha256; t=1771365142; cv=none;\n d=zohomail.com; s=zohoarc;\n b=PZ9ypEDGI/MD7zoOvwoTGuAMX67fgR2eze/Mz71b3l/Gq+XJnujAiPaM9vvmWd/etZl7tUoMA0LTrXWlIAS8ZwI8XOdEGJwXkbamEJ7rYz2nEyeMGZdkE+aTCzM0Rm5CN0AdV9uaJG3Bu1bmIeMbrTIuMXrhkh/lgaRHie1+e8M=","ARC-Message-Signature":"i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com;\n s=zohoarc; t=1771365142;\n 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;\n bh=0Am0S0vYUxt3LOdFgzVIC5dHosG1+YIkfEZrpZLQsVE=;\n b=TYkMGEyvB+YLCGdy7d/Lb6Tgw06eHlemv1mQjuDEDBisWG8sYHwFOXFBlOI5XiPejt2A7zsYPiYie1VdlaybaoDtgOKhgdSTe97lCNA3IUZxkqbFLmIQBg17Duvss2g/A3pV47F0S8hHcr1lWlVyWSYopqwedqVABe5D8kvt4M4=","ARC-Authentication-Results":"i=1; mx.zohomail.com;\n dkim=pass header.i=collabora.com;\n spf=pass smtp.mailfrom=dmitry.osipenko@collabora.com;\n dmarc=pass header.from=","DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1771365142;\n s=zohomail; d=collabora.com; i=dmitry.osipenko@collabora.com;\n h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To;\n bh=0Am0S0vYUxt3LOdFgzVIC5dHosG1+YIkfEZrpZLQsVE=;\n b=NfR9GEAgCCMj68SB/K95d5OquesoAfMHywr8pe5WOHfTdQ0StgF0RSwhTtBU8Ybe\n MQt8HanbVkfV+dHLQnly+tt9+HUcShqsfQpcmWN3uPEBB/9Wpn2tFyblNUqra9gBvUp\n X7I7OBJ5vtcap5PFr7C3JQeLnR7xsxiDA7N5E98Q=","From":"Dmitry Osipenko ","To":"Akihiko Odaki ,\n Huang Rui ,\n =?utf-8?q?Marc-Andr=C3=A9_Lureau?= ,\n\t=?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= ,\n Gerd Hoffmann ,\n =?utf-8?q?Alex_Benn=C3=A9e?= ,\n Pierre-Eric Pelloux-Prayer ,\n \"Michael S . Tsirkin\" , Paolo Bonzini ,\n Yiwei Zhang , Sergio Lopez Pascual ","Cc":"Gert Wollny , qemu-devel@nongnu.org,\n Gurchetan Singh , Alyssa Ross ,\n\t=?utf-8?q?Roger_Pau_Monn=C3=A9?= ,\n Alex Deucher ,\n Stefano Stabellini , =?utf-8?q?Christian_K?=\n\t=?utf-8?q?=C3=B6nig?= ,\n Xenia Ragiadakou ,\n Honglei Huang , Julia Zhang ,\n Chen Jiqian , Rob Clark ,\n Robert Beckett ","Subject":"[PATCH v18 11/19] virtio-gpu: Support DRM native context","Date":"Wed, 18 Feb 2026 00:49:20 +0300","Message-ID":"<20260217214928.2970885-12-dmitry.osipenko@collabora.com>","X-Mailer":"git-send-email 2.52.0","In-Reply-To":"<20260217214928.2970885-1-dmitry.osipenko@collabora.com>","References":"<20260217214928.2970885-1-dmitry.osipenko@collabora.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","Content-Transfer-Encoding":"8bit","X-ZohoMailClient":"External","Received-SPF":"pass client-ip=136.143.188.112;\n 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,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n 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":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Add support for DRM native contexts to VirtIO-GPU. DRM context is enabled\nusing a new virtio-gpu-gl device option \"drm_native_context=on\".\n\nUnlike Virgl and Venus contexts that operate on application API level,\nDRM native contexts work on a kernel UAPI level. This lower level results\nin a lightweight context implementations that yield better performance.\n\nReviewed-by: Akihiko Odaki \nAcked-by: Michael S. Tsirkin \nTested-by: Alex Bennée \nAcked-by: Pierre-Eric Pelloux-Prayer \nReviewed-by: Yiwei Zhang \nTested-by: Yiwei Zhang \nSigned-off-by: Dmitry Osipenko \n---\n docs/system/devices/virtio/virtio-gpu.rst | 11 +++++++++\n hw/display/virtio-gpu-gl.c | 2 ++\n hw/display/virtio-gpu-virgl.c | 28 +++++++++++++++++++++++\n hw/display/virtio-gpu.c | 15 ++++++++++++\n include/hw/virtio/virtio-gpu.h | 3 +++\n 5 files changed, 59 insertions(+)","diff":"diff --git a/docs/system/devices/virtio/virtio-gpu.rst b/docs/system/devices/virtio/virtio-gpu.rst\nindex 0f4bb304a9b8..086e2fcf27b9 100644\n--- a/docs/system/devices/virtio/virtio-gpu.rst\n+++ b/docs/system/devices/virtio/virtio-gpu.rst\n@@ -84,6 +84,17 @@ of virtio-gpu host memory window. This is typically between 256M and 8G.\n \n .. _venus: https://gitlab.freedesktop.org/virgl/venus-protocol/\n \n+DRM native context is supported since release of `virglrenderer`_ v1.0.0\n+using `drm`_ protocol. ``DRM`` virtio-gpu capability set (\"capset\") requires\n+host blob support (``hostmem`` and ``blob`` fields) and should be enabled\n+using ``drm_native_context`` field. The ``hostmem`` field specifies the size\n+of virtio-gpu host memory window. This is typically between 256M and 8G.\n+\n+.. parsed-literal::\n+ -device virtio-gpu-gl,hostmem=8G,blob=on,drm_native_context=on\n+\n+.. _drm: https://gitlab.freedesktop.org/virgl/virglrenderer/-/tree/main/src/drm\n+\n virtio-gpu rutabaga\n -------------------\n \ndiff --git a/hw/display/virtio-gpu-gl.c b/hw/display/virtio-gpu-gl.c\nindex 3e0680880e14..b941e9a4b789 100644\n--- a/hw/display/virtio-gpu-gl.c\n+++ b/hw/display/virtio-gpu-gl.c\n@@ -159,6 +159,8 @@ static const Property virtio_gpu_gl_properties[] = {\n VIRTIO_GPU_FLAG_STATS_ENABLED, false),\n DEFINE_PROP_BIT(\"venus\", VirtIOGPU, parent_obj.conf.flags,\n VIRTIO_GPU_FLAG_VENUS_ENABLED, false),\n+ DEFINE_PROP_BIT(\"drm_native_context\", VirtIOGPU, parent_obj.conf.flags,\n+ VIRTIO_GPU_FLAG_DRM_ENABLED, false),\n };\n \n static void virtio_gpu_gl_device_unrealize(DeviceState *qdev)\ndiff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c\nindex ea9668f11efe..069408c68644 100644\n--- a/hw/display/virtio-gpu-virgl.c\n+++ b/hw/display/virtio-gpu-virgl.c\n@@ -1339,6 +1339,25 @@ int virtio_gpu_virgl_init(VirtIOGPU *g)\n if (virtio_gpu_venus_enabled(g->parent_obj.conf)) {\n flags |= VIRGL_RENDERER_VENUS | VIRGL_RENDERER_RENDER_SERVER;\n }\n+ if (virtio_gpu_drm_enabled(g->parent_obj.conf)) {\n+ flags |= VIRGL_RENDERER_DRM;\n+\n+ if (!(flags & VIRGL_RENDERER_ASYNC_FENCE_CB)) {\n+ /*\n+ * Virglrenderer skips enabling DRM context support without\n+ * enabled async-fence feature. VirtIO-GPU will initialize\n+ * successfully, but DRM context won't be available in guest.\n+ *\n+ * For vrend async-fencing can be enabled only if EGL display\n+ * is used. Vrend can't be disabled in QEMU, hence DRM implicitly\n+ * requires EGL too.\n+ *\n+ * Async-fence was bugged in virglrenderer versions <= 1.1.1.\n+ */\n+ error_report(\"drm requires egl display and virglrenderer >= 1.2.0\");\n+ return -EINVAL;\n+ }\n+ }\n #endif\n \n ret = virgl_renderer_init(g, flags, &virtio_gpu_3d_cbs);\n@@ -1402,5 +1421,14 @@ GArray *virtio_gpu_virgl_get_capsets(VirtIOGPU *g)\n }\n }\n \n+ if (virtio_gpu_drm_enabled(g->parent_obj.conf)) {\n+ virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_DRM,\n+ &capset_max_ver,\n+ &capset_max_size);\n+ if (capset_max_size) {\n+ virtio_gpu_virgl_add_capset(capset_ids, VIRTIO_GPU_CAPSET_DRM);\n+ }\n+ }\n+\n return capset_ids;\n }\ndiff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c\nindex 643e91ca2a7a..8cd966bea639 100644\n--- a/hw/display/virtio-gpu.c\n+++ b/hw/display/virtio-gpu.c\n@@ -1517,6 +1517,21 @@ void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)\n #endif\n }\n \n+ if (virtio_gpu_drm_enabled(g->parent_obj.conf)) {\n+#ifdef VIRGL_VERSION_MAJOR\n+ #if VIRGL_VERSION_MAJOR >= 1\n+ if (!virtio_gpu_blob_enabled(g->parent_obj.conf) ||\n+ !virtio_gpu_hostmem_enabled(g->parent_obj.conf)) {\n+ error_setg(errp, \"drm requires enabled blob and hostmem options\");\n+ return;\n+ }\n+ #else\n+ error_setg(errp, \"old virglrenderer, drm unsupported\");\n+ return;\n+ #endif\n+#endif\n+ }\n+\n if (!virtio_gpu_base_device_realize(qdev,\n virtio_gpu_handle_ctrl_cb,\n virtio_gpu_handle_cursor_cb,\ndiff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h\nindex 16e9f6914f07..718332284305 100644\n--- a/include/hw/virtio/virtio-gpu.h\n+++ b/include/hw/virtio/virtio-gpu.h\n@@ -100,6 +100,7 @@ enum virtio_gpu_base_conf_flags {\n VIRTIO_GPU_FLAG_RUTABAGA_ENABLED,\n VIRTIO_GPU_FLAG_VENUS_ENABLED,\n VIRTIO_GPU_FLAG_RESOURCE_UUID_ENABLED,\n+ VIRTIO_GPU_FLAG_DRM_ENABLED,\n };\n \n #define virtio_gpu_virgl_enabled(_cfg) \\\n@@ -122,6 +123,8 @@ enum virtio_gpu_base_conf_flags {\n (_cfg.hostmem > 0)\n #define virtio_gpu_venus_enabled(_cfg) \\\n (_cfg.flags & (1 << VIRTIO_GPU_FLAG_VENUS_ENABLED))\n+#define virtio_gpu_drm_enabled(_cfg) \\\n+ (_cfg.flags & (1 << VIRTIO_GPU_FLAG_DRM_ENABLED))\n \n struct virtio_gpu_base_conf {\n uint32_t max_outputs;\n","prefixes":["v18","11/19"]}