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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1DE5C433FE for ; Sun, 20 Nov 2022 08:42:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229658AbiKTIms (ORCPT ); Sun, 20 Nov 2022 03:42:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229489AbiKTImo (ORCPT ); Sun, 20 Nov 2022 03:42:44 -0500 Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B759515718 for ; Sun, 20 Nov 2022 00:42:42 -0800 (PST) Received: by mail-pf1-x432.google.com with SMTP id k15so8777175pfg.2 for ; Sun, 20 Nov 2022 00:42:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; 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=um7o47dkwC3+Xw39j9lUuqY5O+T3nm01Mm5u8aYpugQ=; b=gZwm9U6mK3ALwu0oifabLOjV1RxAZrk0HSjZd6PCNBAM9P4WdR+dXylvSF6qvcEqgT D9kzlilet4yYsiLACIUkygpVjo9huz8Ow12yGFK/jcgPF6O/sDdtCWWNbJVd809fVL6x X+fDh2KVWZgLGP+qc9+Ybvk5H7BachFfwqsxpRz5bod4WIa3eK3EXUjylnwFNo/abn0s Zc+6WTgMbTeJ3+i9BW29KtYeIyUXTA9GKQgyDg1RYHte0dkPKWDimw74nJsbOfnPMTus 67pZXkp5xtq2Zze25eQZm1zoQ7jqdOHope2gWc4Yn69zLpH4HP4BzKBpKRdMwQ5mgeCN /47w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=um7o47dkwC3+Xw39j9lUuqY5O+T3nm01Mm5u8aYpugQ=; b=DTAHVwoOsjqQRNdUL4Tn6hGbRMJSkHbHBbMiRn94Pc/cr6dBaxAAti5QowA0ZNXJfP w/DJaoLrLyVl2JIMQOtWfuQ657wzSYIrbcoGMQqemx4/gmDonrbf+FpD2uQbrw3TS7WJ f64LjzX6rqH2KrsTWwlTdRdDsNqz7cwhcq5i5cw0K4LePZiWe4W/mrAUT+rCTPtpOzmC h4FafqCxfRVVDNwiBsXT/nTwaYU9nBBPOTpm/KMRDQp0/9hP9jEsgziuQxDoTDjwQxlS lVDTvl4VNHHdHf4YdAsD26gpCeMFMd/mKU+6cY5YtxGlCKN7JO4qTOleiIiGpbfWjLI7 n+Mw== X-Gm-Message-State: ANoB5pm/H8wegrIRuhddOJmZxXWO39P86WzDRzpNxAMMsq1lP+GI6XQZ tRpzBRo1rU/6f9SyelQIawU= X-Google-Smtp-Source: AA0mqf7UlFnYpp1QvFsITWQ1L0YhPDFpdvVHyeYal9N+quNB0CnpslxjtszIsIKD7xxHdpvpVE5RaA== X-Received: by 2002:a05:6a00:1825:b0:56c:f16d:2f29 with SMTP id y37-20020a056a00182500b0056cf16d2f29mr15603764pfa.53.1668933762210; Sun, 20 Nov 2022 00:42:42 -0800 (PST) Received: from localhost.localdomain ([122.192.14.194]) by smtp.gmail.com with ESMTPSA id q40-20020a17090a17ab00b00212735c8898sm8188273pja.30.2022.11.20.00.42.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Nov 2022 00:42:41 -0800 (PST) From: Song Shuai To: guoren@kernel.org, rostedt@goodmis.org, mhiramat@kernel.org, mark.rutland@arm.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Song Shuai Subject: [PATCH v4 1/2] riscv/ftrace: add ftrace_graph_func Date: Sun, 20 Nov 2022 16:42:29 +0800 Message-Id: <20221120084230.910152-2-suagrfillet@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20221120084230.910152-1-suagrfillet@gmail.com> References: <20221120084230.910152-1-suagrfillet@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Here implements ftrace_graph_func as the function graph tracing function with FTRACE_WITH_REGS defined. function_graph_func gets the point of the parent IP and the frame pointer from fregs and call prepare_ftrace_return for function graph tracing. If FTRACE_WITH_REGS isn't defined, the enable/disable helpers of ftrace_graph_[regs]_call are revised for serving only ftrace_graph_call in the !FTRACE_WITH_REGS version ftrace_caller. Signed-off-by: Song Shuai --- arch/riscv/include/asm/ftrace.h | 13 +++++++++++-- arch/riscv/kernel/ftrace.c | 30 +++++++++++++----------------- 2 files changed, 24 insertions(+), 19 deletions(-) diff --git a/arch/riscv/include/asm/ftrace.h b/arch/riscv/include/asm/ftrace.h index 34b0b523865a..01bebb28eabe 100644 --- a/arch/riscv/include/asm/ftrace.h +++ b/arch/riscv/include/asm/ftrace.h @@ -107,8 +107,17 @@ do { \ struct dyn_ftrace; int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); #define ftrace_init_nop ftrace_init_nop -#endif -#endif +#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS +struct ftrace_ops; +struct ftrace_regs; +void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *op, struct ftrace_regs *fregs); +#define ftrace_graph_func ftrace_graph_func +#endif /* CONFIG_DYNAMIC_FTRACE_WITH_REGS */ + +#endif /* __ASSEMBLY__ */ + +#endif /* CONFIG_DYNAMIC_FTRACE */ #endif /* _ASM_RISCV_FTRACE_H */ diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c index 8c77f236fc71..651ce5808b77 100644 --- a/arch/riscv/kernel/ftrace.c +++ b/arch/riscv/kernel/ftrace.c @@ -169,32 +169,28 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, } #ifdef CONFIG_DYNAMIC_FTRACE +#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS +void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *op, struct ftrace_regs *fregs) +{ + struct pt_regs *regs = arch_ftrace_get_regs(fregs); + unsigned long *parent = (unsigned long *)®s->ra; + + prepare_ftrace_return(parent, ip, frame_pointer(regs)); +} +#else /* CONFIG_DYNAMIC_FTRACE_WITH_REGS */ extern void ftrace_graph_call(void); -extern void ftrace_graph_regs_call(void); int ftrace_enable_ftrace_graph_caller(void) { - int ret; - - ret = __ftrace_modify_call((unsigned long)&ftrace_graph_call, - (unsigned long)&prepare_ftrace_return, true, true); - if (ret) - return ret; - - return __ftrace_modify_call((unsigned long)&ftrace_graph_regs_call, + return __ftrace_modify_call((unsigned long)&ftrace_graph_call, (unsigned long)&prepare_ftrace_return, true, true); } int ftrace_disable_ftrace_graph_caller(void) { - int ret; - - ret = __ftrace_modify_call((unsigned long)&ftrace_graph_call, - (unsigned long)&prepare_ftrace_return, false, true); - if (ret) - return ret; - - return __ftrace_modify_call((unsigned long)&ftrace_graph_regs_call, + return __ftrace_modify_call((unsigned long)&ftrace_graph_call, (unsigned long)&prepare_ftrace_return, false, true); } +#endif /* CONFIG_DYNAMIC_FTRACE_WITH_REGS */ #endif /* CONFIG_DYNAMIC_FTRACE */ #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ -- 2.20.1