From nobody Mon Feb 9 01:45:08 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76A9CC77B7D for ; Mon, 15 May 2023 14:31:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241624AbjEOObj (ORCPT ); Mon, 15 May 2023 10:31:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241648AbjEOObU (ORCPT ); Mon, 15 May 2023 10:31:20 -0400 Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E20552D77; Mon, 15 May 2023 07:31:04 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d2e1a72fcca58-6436e075166so9583747b3a.0; Mon, 15 May 2023 07:31:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1684161064; x=1686753064; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+ALq25/GYGH1zBk6Bxp4nZpXzMg5fERkeTFcF2Sc5VQ=; b=rObvimGJrFK2A8lzFbnXDUzo+N+GHtHZxseJ0knzMtMqtfIou+p1+b/gJAnOQr7Tug g14TqF12i3WogQ2yshrldLo4we4vKJv7pMlBBKn+h1RheZ2bvIeIFVRwmJoXh5iiiCc2 cfLRMefKYsBGfy+wY2jtzgJHkbms95Kk1PZyRXhwyJz8dKOS/Pm00fPPLR2PY9o6K7KF UFXy1gWIuNJLFWLZaRGfUGOCJg1cjJWhflRUt2UBOkoIXDtTT6oAJfDKpmV2BVCyUtLZ i73eCt+MQqGRfZDSOLBD77U1CRi8XUQrENwO9ex5Ku0PD0hAa5CESfb40DrLKGcRRsWg MtFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684161064; x=1686753064; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=+ALq25/GYGH1zBk6Bxp4nZpXzMg5fERkeTFcF2Sc5VQ=; b=huVU5/6dhBI9J/Vst+YGVezscSXJ249IQJY7cZLrL0cJhZoEF63Kuj7WGLqN2CYdDk Y8sN6S9nV4fNC/wxrIDLwBaW9pting1YYH0czxdhz/OodPum0tmT2xfo/wd5QGiy00WV p24uDxPUH7W3pFuBa+gUOGiNK+hKZWxFMKnMmh9f47sv1Cailg5VqdxO0/iTDP8VZc+U pkg3mrEe3m8WEh01EZdBneo8x+qzrNRY3gtc9Y1ZzZq9TG0hkp62TziMaXMhKAy0mjRx lJSiaYG6RNQ4lSUrjY+A3aZJDOxzkguZAkIWLyxDZAqRetYierZ8kGoWgNCkpYRS+B3O zWFA== X-Gm-Message-State: AC+VfDwa500sl9dMaK6vYuJtGcO/VPlooWMA8Z6VlGbeGjqb/sX6Ueet RNdE2HcP/Y0Ey0KS4mkDbS0= X-Google-Smtp-Source: ACHHUZ4R3D/gaKOk7QkT8FMcc9BtENuYixxz4Hv1MjvFhVsW4kdm9Xr25qLw7//hiieQaz81R+IUPw== X-Received: by 2002:a05:6a00:218a:b0:640:defd:a6d5 with SMTP id h10-20020a056a00218a00b00640defda6d5mr40180183pfi.12.1684161063962; Mon, 15 May 2023 07:31:03 -0700 (PDT) Received: from localhost ([2a00:79e1:abd:4a00:61b:48ed:72ab:435b]) by smtp.gmail.com with ESMTPSA id j18-20020aa78dd2000000b0064c9c80617csm2666690pfr.214.2023.05.15.07.31.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 May 2023 07:31:03 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org, Daniel Vetter , Tvrtko Ursulin , Boris Brezillon , Christopher Healy , Emil Velikov , =?UTF-8?q?Christian=20K=C3=B6nig?= , Rob Clark , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Jonathan Corbet , linux-doc@vger.kernel.org (open list:DOCUMENTATION), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v4 8/9] drm/fdinfo: Add comm/cmdline override fields Date: Mon, 15 May 2023 07:30:15 -0700 Message-Id: <20230515143023.801167-9-robdclark@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230515143023.801167-1-robdclark@gmail.com> References: <20230515143023.801167-1-robdclark@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Rob Clark These are useful in particular for VM scenarios where the process which has opened to drm device file is just a proxy for the real user in a VM guest. v2: doc cleanups Signed-off-by: Rob Clark --- Documentation/gpu/drm-usage-stats.rst | 10 ++++++++++ drivers/gpu/drm/drm_file.c | 15 +++++++++++++++ include/drm/drm_file.h | 19 +++++++++++++++++++ 3 files changed, 44 insertions(+) diff --git a/Documentation/gpu/drm-usage-stats.rst b/Documentation/gpu/drm-= usage-stats.rst index fe35a291ff3e..03bd92b9125a 100644 --- a/Documentation/gpu/drm-usage-stats.rst +++ b/Documentation/gpu/drm-usage-stats.rst @@ -66,20 +66,30 @@ question. Unique value relating to the open DRM file descriptor used to distinguish duplicated and shared file descriptors. Conceptually the value should map = 1:1 to the in kernel representation of `struct drm_file` instances. =20 Uniqueness of the value shall be either globally unique, or unique within = the scope of each device, in which case `drm-pdev` shall be present as well. =20 Userspace should make sure to not double account any usage statistics by u= sing the above described criteria in order to associate data to individual clie= nts. =20 +- drm-comm-override: +- drm-cmdline-override: + +Returns the client comm (executable) or cmdline override strings. Some dr= ivers +support letting userspace override this in cases where the userspace is si= mply a +"proxy". Such as is the case with virglrenderer drm native context, where= the +host process is just forwarding command submission, etc, from guest usersp= ace. +This allows the proxy to make visible the cmdline of the actual app in the= VM +guest. + Utilization ^^^^^^^^^^^ =20 - drm-engine-: ns =20 GPUs usually contain multiple execution engines. Each shall be given a sta= ble and unique name (keystr), with possible values documented in the driver sp= ecific documentation. =20 Value shall be in specified time units which the respective GPU engine spe= nt diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c index 739d9b7ab9ec..a0684c4a021d 100644 --- a/drivers/gpu/drm/drm_file.c +++ b/drivers/gpu/drm/drm_file.c @@ -171,20 +171,22 @@ struct drm_file *drm_file_alloc(struct drm_minor *min= or) mutex_init(&file->fbs_lock); INIT_LIST_HEAD(&file->blobs); INIT_LIST_HEAD(&file->pending_event_list); INIT_LIST_HEAD(&file->event_list); init_waitqueue_head(&file->event_wait); file->event_space =3D 4096; /* set aside 4k for event buffer */ =20 spin_lock_init(&file->master_lookup_lock); mutex_init(&file->event_read_lock); =20 + mutex_init(&file->override_lock); + if (drm_core_check_feature(dev, DRIVER_GEM)) drm_gem_open(dev, file); =20 if (drm_core_check_feature(dev, DRIVER_SYNCOBJ)) drm_syncobj_open(file); =20 drm_prime_init_file_private(&file->prime); =20 if (dev->driver->open) { ret =3D dev->driver->open(dev, file); @@ -285,20 +287,22 @@ void drm_file_free(struct drm_file *file) drm_master_release(file); =20 if (dev->driver->postclose) dev->driver->postclose(dev, file); =20 drm_prime_destroy_file_private(&file->prime); =20 WARN_ON(!list_empty(&file->event_list)); =20 put_pid(file->pid); + kfree(file->override_comm); + kfree(file->override_cmdline); kfree(file); } =20 static void drm_close_helper(struct file *filp) { struct drm_file *file_priv =3D filp->private_data; struct drm_device *dev =3D file_priv->minor->dev; =20 mutex_lock(&dev->filelist_mutex); list_del(&file_priv->lhead); @@ -988,20 +992,31 @@ void drm_show_fdinfo(struct seq_file *m, struct file = *f) drm_printf(&p, "drm-client-id:\t%llu\n", file->client_id); =20 if (dev_is_pci(dev->dev)) { struct pci_dev *pdev =3D to_pci_dev(dev->dev); =20 drm_printf(&p, "drm-pdev:\t%04x:%02x:%02x.%d\n", pci_domain_nr(pdev->bus), pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); } =20 + mutex_lock(&file->override_lock); + if (file->override_comm) { + drm_printf(&p, "drm-comm-override:\t%s\n", + file->override_comm); + } + if (file->override_cmdline) { + drm_printf(&p, "drm-cmdline-override:\t%s\n", + file->override_cmdline); + } + mutex_unlock(&file->override_lock); + if (dev->driver->show_fdinfo) dev->driver->show_fdinfo(&p, file); } EXPORT_SYMBOL(drm_show_fdinfo); =20 /** * mock_drm_getfile - Create a new struct file for the drm device * @minor: drm minor to wrap (e.g. #drm_device.primary) * @flags: file creation mode (O_RDWR etc) * diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h index 5f5c156903d2..25384edd1e91 100644 --- a/include/drm/drm_file.h +++ b/include/drm/drm_file.h @@ -363,20 +363,39 @@ struct drm_file { /** @event_read_lock: Serializes drm_read(). */ struct mutex event_read_lock; =20 /** * @prime: * * Per-file buffer caches used by the PRIME buffer sharing code. */ struct drm_prime_file_private prime; =20 + /** + * @comm: Overridden task comm + * + * Accessed under override_lock + */ + char *override_comm; + + /** + * @cmdline: Overridden task cmdline + * + * Accessed under override_lock + */ + char *override_cmdline; + + /** + * @override_lock: Serialize access to override_comm and override_cmdline + */ + struct mutex override_lock; + /* private: */ #if IS_ENABLED(CONFIG_DRM_LEGACY) unsigned long lock_count; /* DRI1 legacy lock count */ #endif }; =20 /** * drm_is_primary_client - is this an open file of the primary node * @file_priv: DRM file * --=20 2.40.1