From nobody Mon Apr 13 20:34:45 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 64BD2C433FE for ; Wed, 16 Nov 2022 03:13:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232145AbiKPDNl (ORCPT ); Tue, 15 Nov 2022 22:13:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230342AbiKPDNc (ORCPT ); Tue, 15 Nov 2022 22:13:32 -0500 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6499D558C for ; Tue, 15 Nov 2022 19:13:31 -0800 (PST) Received: by mail-pl1-x631.google.com with SMTP id io19so15209850plb.8 for ; Tue, 15 Nov 2022 19:13:31 -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=kfjBpdjhy3FRsarxq0mtTibVzLi0v1ap0dEoQSB+eCk=; b=HCmzSGbRAwS0Xz3K0YWpt5t1BGt5W3HFACyaOHbIgILZxabfSXhfkANFw6bM2qGYbD KT0gAgUO/ptx1Ede2o+OegsXqmyFeG6hMuBNz+iz5bir+2JjrfxSN+2o+JBGM2a0bLvH BYxMmfVtXGLOwByy0FY0WYjep6f2KcONrF0Y6SP0LJb11yt5u+CWezM7S4UkCQS9T1wu w9eytCB0ND+aNbyDEgLxjbTL8k7kUrGyS9cM8jW2OQcV6/PhXTcUTFFXPUwWiPAcyUSX L+leE4UYdnSSKzRlg1ofV+ass5fcCgE4kwe8JKRfhBSViurqpafvfi9En+qpZ4TJtsOa o5Dw== 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=kfjBpdjhy3FRsarxq0mtTibVzLi0v1ap0dEoQSB+eCk=; b=aDmZthL2b3fL4sB2vHXETM1hukHpvVx4Vwo84OapGoDS9vVYsRaxyta3f83TfRiRfO ZO0JO16ztAa/OWhFQ6WUONOYeZhFCCgZXGGM6mc+Fg5Yd5aiWDZRZTumyl1h38P53pof kgK2TMdrudbobYm3VtebiuOTsvRkebLQK3XCmaQRplfv8u94AggjvMLXSVD+VA85uaJi I8w1GN5AKcFz62J7KOmigFZjRdKcu98rs4vyw37DmHbmFe07I0Ir76Xtee6nvgL70X/0 SbpGkOksaYXVEJNj0cr6c6UQH91PDhIJ3U9H6XGWTDXk53j9yHWgVK5CAN+QiZK6pkmo nV2w== X-Gm-Message-State: ANoB5pmcEPi2dsNdVNRKnO7jKKnuJzzxokn6RFCx9gK8gt5ijnYzlftf niF8ujSS7LgjcJQN0VxoDKQ= X-Google-Smtp-Source: AA0mqf6906E8vnIqvm3Ht/G0BwBICFFZTgDzXIhHEd3G6itTsjMGFeNoVLqdl6f5iKF7o8OuPFNjLA== X-Received: by 2002:a17:902:b186:b0:185:4ec3:c708 with SMTP id s6-20020a170902b18600b001854ec3c708mr7046411plr.60.1668568410924; Tue, 15 Nov 2022 19:13:30 -0800 (PST) Received: from localhost.localdomain ([221.226.144.218]) by smtp.gmail.com with ESMTPSA id ml22-20020a17090b361600b0020b2082e0acsm348295pjb.0.2022.11.15.19.13.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Nov 2022 19:13:30 -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 v2 1/3] riscv/ftrace: add ftrace_graph_func Date: Wed, 16 Nov 2022 11:13:03 +0800 Message-Id: <20221116031305.286634-2-suagrfillet@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20221116031305.286634-1-suagrfillet@gmail.com> References: <20221116031305.286634-1-suagrfillet@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" 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 remain for serving the !FTRACE_WITH_REGS version ftrace_caller. Signed-off-by: Song Shuai --- arch/riscv/include/asm/ftrace.h | 13 +++++++++++-- arch/riscv/kernel/ftrace.c | 16 ++++++++++++++++ 2 files changed, 27 insertions(+), 2 deletions(-) diff --git a/arch/riscv/include/asm/ftrace.h b/arch/riscv/include/asm/ftrac= e.h index 04dad3380041..61a8f4be67eb 100644 --- a/arch/riscv/include/asm/ftrace.h +++ b/arch/riscv/include/asm/ftrace.h @@ -81,8 +81,17 @@ do { \ struct dyn_ftrace; int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); #define ftrace_init_nop ftrace_init_nop -#endif =20 -#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 */ =20 #endif /* _ASM_RISCV_FTRACE_H */ diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c index 2086f6585773..148a5480076b 100644 --- a/arch/riscv/kernel/ftrace.c +++ b/arch/riscv/kernel/ftrace.c @@ -196,6 +196,20 @@ void prepare_ftrace_return(unsigned long *parent, unsi= gned long self_addr, } =20 #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 =3D arch_ftrace_get_regs(fregs); + unsigned long *parent =3D (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) @@ -223,5 +237,7 @@ int ftrace_disable_ftrace_graph_caller(void) return __ftrace_modify_call((unsigned long)&ftrace_graph_regs_call, (unsigned long)&prepare_ftrace_return, false); } +#endif /* CONFIG_DYNAMIC_FTRACE_WITH_REGS */ + #endif /* CONFIG_DYNAMIC_FTRACE */ #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ --=20 2.20.1