From patchwork Fri Oct 4 12:36:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ma=C3=ADra_Canal?= X-Patchwork-Id: 13822236 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 4749ECFA774 for ; Fri, 4 Oct 2024 12:39:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 249F810E9EA; Fri, 4 Oct 2024 12:39:01 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=igalia.com header.i=@igalia.com header.b="YZhcQY68"; dkim-atps=neutral Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) by gabe.freedesktop.org (Postfix) with ESMTPS id EAEFD10E9EA for ; Fri, 4 Oct 2024 12:38:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=d2iMVdiX4Q7fHdp7dKgJJFBNw8ERc0WaBdqcXcFR1H8=; b=YZhcQY68RgKTBunsJ8HeLznITf OAvY4JOG/XZgQn+Cf6YBkPRdrnax+B1uamx2b6iD6Xr3kozirc6Au0mARMuCST+XKELZ8L2vjFMeA N7qSWFdcFvoEcW/yvYUrRziqEQRLGq3Jh47+JxBi0WVMDQLUxwwMheox1UVk9lXBr8Dz3Ko6qBOiE 2Ub9E3RHKYT6jHms02LPayimFfVaXAoHz6XHhVgRkthT53rr58sBnwCPlZRn0Dx0lMOcDPoT8O8Vq 5ASrGOe6nc49EL5TxDJNOXluc+C2CYC0CYKZ2MjRe8U8oBA1gqmcXgs40Dw4BbdtQRi4QXKelpJoK /S94RAww==; Received: from [187.36.213.55] (helo=morissey..) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1swha7-004phG-4C; Fri, 04 Oct 2024 14:38:51 +0200 From: =?utf-8?q?Ma=C3=ADra_Canal?= To: Maxime Ripard , Dave Stevenson , "Juan A . Suarez Romero" , Maarten Lankhorst , Thomas Zimmermann , David Airlie , Daniel Vetter Cc: dri-devel@lists.freedesktop.org, kernel-dev@igalia.com, =?utf-8?q?Ma?= =?utf-8?q?=C3=ADra_Canal?= , stable@vger.kernel.org, Boris Brezillon Subject: [PATCH 2/2] drm/vc4: Stop the active perfmon before being destroyed Date: Fri, 4 Oct 2024 09:36:00 -0300 Message-ID: <20241004123817.890016-2-mcanal@igalia.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241004123817.890016-1-mcanal@igalia.com> References: <20241004123817.890016-1-mcanal@igalia.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Upon closing the file descriptor, the active performance monitor is not stopped. Although all perfmons are destroyed in `vc4_perfmon_close_file()`, the active performance monitor's pointer (`vc4->active_perfmon`) is still retained. If we open a new file descriptor and submit a few jobs with performance monitors, the driver will attempt to stop the active performance monitor using the stale pointer in `vc4->active_perfmon`. However, this pointer is no longer valid because the previous process has already terminated, and all performance monitors associated with it have been destroyed and freed. To fix this, when the active performance monitor belongs to a given process, explicitly stop it before destroying and freeing it. Cc: # v4.17+ Cc: Boris Brezillon Cc: Juan A. Suarez Romero Fixes: 65101d8c9108 ("drm/vc4: Expose performance counters to userspace") Signed-off-by: Maíra Canal Reviewed-by: Juan A. Suarez --- drivers/gpu/drm/vc4/vc4_perfmon.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/vc4/vc4_perfmon.c b/drivers/gpu/drm/vc4/vc4_perfmon.c index f2e56d0f6298..f1342f917cf7 100644 --- a/drivers/gpu/drm/vc4/vc4_perfmon.c +++ b/drivers/gpu/drm/vc4/vc4_perfmon.c @@ -116,6 +116,11 @@ void vc4_perfmon_open_file(struct vc4_file *vc4file) static int vc4_perfmon_idr_del(int id, void *elem, void *data) { struct vc4_perfmon *perfmon = elem; + struct vc4_dev *vc4 = (struct vc4_dev *)data; + + /* If the active perfmon is being destroyed, stop it first */ + if (perfmon == vc4->active_perfmon) + vc4_perfmon_stop(vc4, perfmon, false); vc4_perfmon_put(perfmon); @@ -130,7 +135,7 @@ void vc4_perfmon_close_file(struct vc4_file *vc4file) return; mutex_lock(&vc4file->perfmon.lock); - idr_for_each(&vc4file->perfmon.idr, vc4_perfmon_idr_del, NULL); + idr_for_each(&vc4file->perfmon.idr, vc4_perfmon_idr_del, vc4); idr_destroy(&vc4file->perfmon.idr); mutex_unlock(&vc4file->perfmon.lock); mutex_destroy(&vc4file->perfmon.lock);