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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2E82C7618B for ; Mon, 15 Jul 2019 05:13:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7925D214DA for ; Mon, 15 Jul 2019 05:13:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563167626; bh=aW2i/PMsu1zMZsd3sK5Tcsd3UlqlRHAKKbDGz7j/x1Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ADwqI3p+ZGxV4HQ+GJrOoUBC2O5MiLAXC4zhVijz16LXB/wRb22Lo0WSY03rN4mQv UKvH9P11clc3D5hPepfeyG2tIwlntICGDej344aw2Cq9ZF34/soBiSSPQJMnMA2+qU c/DjEp09V01c1TTCBFN2DnH+gvjyC3+4DRIdU7xo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729333AbfGOFNo (ORCPT ); Mon, 15 Jul 2019 01:13:44 -0400 Received: from mail.kernel.org ([198.145.29.99]:47872 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725954AbfGOFNo (ORCPT ); Mon, 15 Jul 2019 01:13:44 -0400 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 266BB20868; Mon, 15 Jul 2019 05:13:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563167622; bh=aW2i/PMsu1zMZsd3sK5Tcsd3UlqlRHAKKbDGz7j/x1Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0KA2pDsc9wLeijExz5pj9YhLJ81thpbG8VttUT9EBn6L4mZrrbxRrt0v7tF5Op5p6 oX5+yNDT79lA8eB6EDg2ARNtulRqRGZKAp49Dm+QZkmkjia3mMZ5f2AC26TLfR+Fm3 Zwettd3PoEhzKePdC0+PVgyCfLfEwMB1yKm2HBNA= From: Masami Hiramatsu To: Steven Rostedt , Rob Herring , Frank Rowand , Tim Bird Cc: Ingo Molnar , Namhyung Kim , Jiri Olsa , Arnaldo Carvalho de Melo , Tom Zanussi , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [RFC PATCH v2 14/15] tracing: of: Add function tracer filter properties Date: Mon, 15 Jul 2019 14:13:37 +0900 Message-Id: <156316761767.23477.13784128240295644594.stgit@devnote2> X-Mailer: git-send-email 2.20.1 In-Reply-To: <156316746861.23477.5815110570539190650.stgit@devnote2> References: <156316746861.23477.5815110570539190650.stgit@devnote2> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add function tracer filter properties which includes - ftrace-filters : string array of filter rules - ftrace-notraces : string array of notrace rules These properties are available on ftrace root node and instance node. Signed-off-by: Masami Hiramatsu --- kernel/trace/trace_of.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/kernel/trace/trace_of.c b/kernel/trace/trace_of.c index 14d6c9a8fd81..1ee6fab918f5 100644 --- a/kernel/trace/trace_of.c +++ b/kernel/trace/trace_of.c @@ -322,11 +322,47 @@ trace_of_init_events(struct trace_array *tr, struct device_node *node) #define trace_of_init_events(tr, node) do {} while (0) #endif +#ifdef CONFIG_FUNCTION_TRACER +extern bool ftrace_filter_param __initdata; +extern int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf, + int len, int reset); +extern int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf, + int len, int reset); + +static void __init +trace_of_set_ftrace_filter(struct ftrace_ops *ops, const char *property, + struct device_node *node) +{ + struct property *prop; + const char *p; + char buf[MAX_BUF_LEN]; + int err; + + of_property_for_each_string(node, property, prop, p) { + if (strlcpy(buf, p, ARRAY_SIZE(buf)) >= ARRAY_SIZE(buf)) { + pr_err("filter string is too long: %s\n", p); + return; + } + err = ftrace_set_filter(ops, buf, strlen(buf), 0); + if (err) { + pr_err("Failed to add %s: %s\n", property, buf); + return; + } + ftrace_filter_param = true; + } +} +#else +#define trace_of_set_ftrace_filter(ops, prop, node) do {} while (0) +#endif + static void __init trace_of_enable_tracer(struct trace_array *tr, struct device_node *node) { const char *p; + trace_of_set_ftrace_filter(tr->ops, "ftrace-filters", node); + trace_of_set_ftrace_filter(tr->ops, "ftrace-notraces", node); + if (!of_property_read_string(node, "tracer", &p)) { if (tracing_set_tracer(tr, p) < 0) pr_err("Failed to set given tracer: %s\n", p);