From patchwork Sun May 5 14:25:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 13654395 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 7638AC4345F for ; Sun, 5 May 2024 14:29:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=soTKBGSQwDkv8tEOPTfNZ4f1DBJoDGrjWG5h8WInwFA=; b=0EvlZHp0pR9vHp LimX1NfdAP4lWuJxaWLnDjRLtlcFacOg2SMm5bd/nLEiQ0FueQIN5TjGxH/czLlDONvideX5PdH0f zUpDjuUTPUoNSSyY4Ta2EPtDuOOZOU/UvtrG/5Co6hShHBnXNhm50YSnpigcbi0enNkQa/Rgkri39 UZSjSuJOPmPOTCmBBQG3zt/x+3wl1CLSLelP9cmSOfdLL8FyKcpkmN9QRzM+Y9wq1BzxZbmmqQBQE QFnVe9HjBdV15LOXWdjXAf3SM6Ztrz2smvMKPJZ3gpTKlxXAhrFUvZ+gPJHwda+87NzlS+LPPp2SJ qqwD/swnCi3Ik9fcFFxQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s3cri-00000004U5D-3Umw; Sun, 05 May 2024 14:29:22 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s3crc-00000004U0M-3uGd; Sun, 05 May 2024 14:29:16 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=bP6HuoUMXi9ivDdJhuywQ3Y30eb1dSG7Z8hyYP5sWNc=; b=RYVCzGgLFjlMCnpLH0DxUsaJto t3bCJm8R/bHajO0tRY5naOn/S7aIn8e2IDO7mjySCnPN0EFFn2We6y0RCMpXdLdS53nZYSTTdXovd pUp/uuFEyzexSKxNIewCj+lc86a00CIeekmQeIhkLujue+qOSF1yon/s8CVDQwyMH/TVKpMS8xZUx yEc5G2lSAfxOXiR8HzyyqnXCLX247L9s7ykVnMspAJ1bnUE1UmeOnEZV0GOER4ZfDR6AvF1B03ejd uozrFNRDWkG836q2xhPZQ6AuxXTMrFACUKPHR04DZBNTcCz5wm9dND8/hpuVOkmgotZPaeZmL1CB7 t70/bDPQ==; Received: from sin.source.kernel.org ([145.40.73.55]) by desiato.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s3crR-00000001M1j-45FP; Sun, 05 May 2024 14:29:15 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id E3BA9CE0A4B; Sun, 5 May 2024 14:28:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B27BEC4DDE7; Sun, 5 May 2024 14:28:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714919338; bh=IjQRyjekukMjpd5h0+fXfebHcomYxPC0ei8vi/yCB1s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cuVFtupflLG9foxMymnTpolKk/M8bZjmlvoz/5eAdj/Z7jQ3VoLWttmwQjjfF7k6F gVRucLz5J7TjB0oz3lKSXF/Qfgn4YfiKtiBaspHSER9pRgodxhwQaBwBBlZJXEAbx3 itoCIx+2aKqrcMnxllqD/Xqq15d6gfl6nRuhpfksLTuLH3EHuWQluNRdW0IvqIbrxN zgi4oer7nSTtlhcycRpg75sJg7UMeotCvpnVKznt18uUIrjjgHbOqf1KjIF6aonw37 +sBXk1tkpAP2cobOwC0+bu9JCS4gou7ZT1EdLfDoRt1l+1jvKZ4OXqqsn3wKoXCOZa 26OgeAK2La2gg== From: Mike Rapoport To: linux-kernel@vger.kernel.org Cc: Alexandre Ghiti , Andrew Morton , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Catalin Marinas , Christophe Leroy , "David S. Miller" , Dinh Nguyen , Donald Dutile , Eric Chanudet , Heiko Carstens , Helge Deller , Huacai Chen , Kent Overstreet , Liviu Dudau , Luis Chamberlain , Mark Rutland , Masami Hiramatsu , Michael Ellerman , Mike Rapoport , Nadav Amit , Palmer Dabbelt , Peter Zijlstra , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Rick Edgecombe , Russell King , Sam Ravnborg , Song Liu , Steven Rostedt , Thomas Bogendoerfer , Thomas Gleixner , Will Deacon , bpf@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v8 13/17] x86/ftrace: enable dynamic ftrace without CONFIG_MODULES Date: Sun, 5 May 2024 17:25:56 +0300 Message-ID: <20240505142600.2322517-14-rppt@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240505142600.2322517-1-rppt@kernel.org> References: <20240505142600.2322517-1-rppt@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240505_152906_988499_E3B3D909 X-CRM114-Status: GOOD ( 12.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "Mike Rapoport (IBM)" Dynamic ftrace must allocate memory for code and this was impossible without CONFIG_MODULES. With execmem separated from the modules code, execmem_text_alloc() is available regardless of CONFIG_MODULES. Remove dependency of dynamic ftrace on CONFIG_MODULES and make CONFIG_DYNAMIC_FTRACE select CONFIG_EXECMEM in Kconfig. Signed-off-by: Mike Rapoport (IBM) Reviewed-by: Steven Rostedt (Google) --- arch/x86/Kconfig | 1 + arch/x86/kernel/ftrace.c | 10 ---------- 2 files changed, 1 insertion(+), 10 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 4474bf32d0a4..f2917ccf4fb4 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -34,6 +34,7 @@ config X86_64 select SWIOTLB select ARCH_HAS_ELFCORE_COMPAT select ZONE_DMA32 + select EXECMEM if DYNAMIC_FTRACE config FORCE_DYNAMIC_FTRACE def_bool y diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index c8ddb7abda7c..8da0e66ca22d 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -261,8 +261,6 @@ void arch_ftrace_update_code(int command) /* Currently only x86_64 supports dynamic trampolines */ #ifdef CONFIG_X86_64 -#ifdef CONFIG_MODULES -/* Module allocation simplifies allocating memory for code */ static inline void *alloc_tramp(unsigned long size) { return execmem_alloc(EXECMEM_FTRACE, size); @@ -271,14 +269,6 @@ static inline void tramp_free(void *tramp) { execmem_free(tramp); } -#else -/* Trampolines can only be created if modules are supported */ -static inline void *alloc_tramp(unsigned long size) -{ - return NULL; -} -static inline void tramp_free(void *tramp) { } -#endif /* Defined as markers to the end of the ftrace default trampolines */ extern void ftrace_regs_caller_end(void);