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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 60B9FC54E67 for ; Tue, 12 Mar 2024 03:39:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 19DA710EFCD; Tue, 12 Mar 2024 03:39:34 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="nhhgZnml"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 08FF310EE39 for ; Tue, 12 Mar 2024 03:39:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1710214760; x=1741750760; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=aAz+uv+1jjvxLzx3O1xQEDbLCCzQ72/hV0fIs9O/ELM=; b=nhhgZnml5Oc3s9dKwfkbY15X3aPkDSB9+IG1rWPUn26fLgFk23pIG9KL 46SkDuDi5uS9YCsJ6aNN+keTdfFyUXqY2I1y15gU00hPkOJYeqD2GXc0K 5CxYoXMopEA2z5xq3P+gjw6sgHVyXDrgPhQ7Kf2j1qEcfzGC9N90emmQH Wa8hWMGpmMiWyJhtrp6ZdW0YInC/3R4ZKy7AVcOX26m6W4GTQwNvVN1wq dwlP4UWjVnDjcvj04ln0pMZf15ATOjNaWtR0WiT9SKQzSzyoNsx8E7G2M CELo8rUNYcnT6iifgYwyy3T0YINR+plE6DDnGJoIwLb2xv/rV0lPwxZA3 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,11010"; a="5080178" X-IronPort-AV: E=Sophos;i="6.07,118,1708416000"; d="scan'208";a="5080178" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Mar 2024 20:39:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,118,1708416000"; d="scan'208";a="11488731" Received: from orsosgc001.jf.intel.com (HELO unerlige-ril.jf.intel.com) ([10.165.21.138]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Mar 2024 20:39:19 -0700 From: Ashutosh Dixit To: intel-xe@lists.freedesktop.org Subject: [PATCH 02/17] drm/xe/perf/uapi: Add perf_stream_paranoid sysctl Date: Mon, 11 Mar 2024 20:39:01 -0700 Message-ID: <20240312033914.2747740-3-ashutosh.dixit@intel.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240312033914.2747740-1-ashutosh.dixit@intel.com> References: <20240312033914.2747740-1-ashutosh.dixit@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Normally only superuser/root can access perf counter data. However, superuser can set perf_stream_paranoid sysctl to 0 to allow non-privileged users to also access perf data. perf_stream_paranoid is introduced at the perf layer to allow different perf stream types to share this access mechanism. Reviewed-by: Umesh Nerlige Ramappa Signed-off-by: Ashutosh Dixit --- drivers/gpu/drm/xe/xe_module.c | 5 +++++ drivers/gpu/drm/xe/xe_perf.c | 28 ++++++++++++++++++++++++++++ drivers/gpu/drm/xe/xe_perf.h | 4 ++++ 3 files changed, 37 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_module.c b/drivers/gpu/drm/xe/xe_module.c index 110b69864656..42085a4b56be 100644 --- a/drivers/gpu/drm/xe/xe_module.c +++ b/drivers/gpu/drm/xe/xe_module.c @@ -11,6 +11,7 @@ #include "xe_drv.h" #include "xe_hw_fence.h" #include "xe_pci.h" +#include "xe_perf.h" #include "xe_sched_job.h" struct xe_modparam xe_modparam = { @@ -66,6 +67,10 @@ static const struct init_funcs init_funcs[] = { .init = xe_register_pci_driver, .exit = xe_unregister_pci_driver, }, + { + .init = xe_perf_sysctl_register, + .exit = xe_perf_sysctl_unregister, + }, }; static int __init xe_init(void) diff --git a/drivers/gpu/drm/xe/xe_perf.c b/drivers/gpu/drm/xe/xe_perf.c index a130076b59aa..37538e98dcc0 100644 --- a/drivers/gpu/drm/xe/xe_perf.c +++ b/drivers/gpu/drm/xe/xe_perf.c @@ -4,9 +4,13 @@ */ #include +#include #include "xe_perf.h" +u32 xe_perf_stream_paranoid = true; +static struct ctl_table_header *sysctl_header; + int xe_perf_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { struct drm_xe_perf_param *arg = data; @@ -19,3 +23,27 @@ int xe_perf_ioctl(struct drm_device *dev, void *data, struct drm_file *file) return -EINVAL; } } + +static struct ctl_table perf_ctl_table[] = { + { + .procname = "perf_stream_paranoid", + .data = &xe_perf_stream_paranoid, + .maxlen = sizeof(xe_perf_stream_paranoid), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE, + }, + {} +}; + +int xe_perf_sysctl_register(void) +{ + sysctl_header = register_sysctl("dev/xe", perf_ctl_table); + return 0; +} + +void xe_perf_sysctl_unregister(void) +{ + unregister_sysctl_table(sysctl_header); +} diff --git a/drivers/gpu/drm/xe/xe_perf.h b/drivers/gpu/drm/xe/xe_perf.h index 254cc7cf49fe..1ff0a07ebab3 100644 --- a/drivers/gpu/drm/xe/xe_perf.h +++ b/drivers/gpu/drm/xe/xe_perf.h @@ -11,6 +11,10 @@ struct drm_device; struct drm_file; +extern u32 xe_perf_stream_paranoid; + int xe_perf_ioctl(struct drm_device *dev, void *data, struct drm_file *file); +int xe_perf_sysctl_register(void); +void xe_perf_sysctl_unregister(void); #endif -- 2.41.0