From patchwork Wed Nov 18 22:07:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 1402597 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=Oq8r6SCN; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CbxmC5KD6z9sVL for ; Thu, 19 Nov 2020 09:08:59 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726881AbgKRWHh (ORCPT ); Wed, 18 Nov 2020 17:07:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727171AbgKRWHf (ORCPT ); Wed, 18 Nov 2020 17:07:35 -0500 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBA4EC061A4D for ; Wed, 18 Nov 2020 14:07:35 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id z29so4476701ybi.23 for ; Wed, 18 Nov 2020 14:07:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=kod53Z9Bn/oLp+88TnQNrWTDZiAkcCd5b++0bm6KqDA=; b=Oq8r6SCNamOHoS7iSUmJRRev5DGFdlnvFFu0GIi+STeDi/2VxvM9bYiQjKuTfjLCAf X7p4TRLUESowZaZNgKuuIfZO5b2odS7+x2ubT/aFKQrV+o/bQpkDUCuuQ+uEb1OdNofk gyWDaXNvo32HCUdIUsKJKgTCnCmshX/5gGSe7kgfDUd1vWxv/fIYYnYCLUe7y1UiwEPL 1HPFqlQKwycMl+fWUgllMc17t4YP4tBatTmTzNly75QmRLVXHG+shI6tsS1/2JjB03hV mCttBb9qsBFxYfJBfWt4guKh937AQ44YGt8peZ1CR7fqFHZAN5cE3N1fTS63ad9uCbFi kp1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=kod53Z9Bn/oLp+88TnQNrWTDZiAkcCd5b++0bm6KqDA=; b=H3eKMGYWm4MwR4YqMJn8vKVS/lpc/Ar2b5FIEtDr9ObCrA3TsiFnbPUX7/PCAUSpuM hooDMvW9OoFcRpokAYYS2JcrY3rK7aHTOiZLckNvAWh5PGpRNlSpm0NzZnB9uDg9XIya 9YDz+/Clja57ZVNpwnVSqBIome6OfHeXQ8p1x/ZhJw6H1CK1yAlFjw1ickojIgq9TGxT mlqC+FJ0BXsMvIUNI43tFGpbwjvT2u7M0yYAdIJz4sfvomlCMjbfyB9cSyO2CH0sxPJx gMlEIUSrJq4LMk4EGWQZYh492Vep1iNTCGgvauNn4XZw05ktNMIfy0HlLQfu9aySSvSP Z6Jg== X-Gm-Message-State: AOAM530KxWnNA7zL+hanonMzfDSfQPJSKBqAbIp4rzm1wGo9CNDqbhcu RVqDkusFrRUlFHJkwVxh2UmZk37Y+30v7BX5Znw= X-Google-Smtp-Source: ABdhPJzJieOsn4JuNK/fNek5dpK0KwEKnqVJ5VjcmWHbrJqO30ArGzOEitVj3onNlAiY/AvgfqfGAcAMvdZ4a69M8d0= Sender: "samitolvanen via sendgmr" X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a25:830e:: with SMTP id s14mr10156827ybk.213.1605737254956; Wed, 18 Nov 2020 14:07:34 -0800 (PST) Date: Wed, 18 Nov 2020 14:07:15 -0800 In-Reply-To: <20201118220731.925424-1-samitolvanen@google.com> Message-Id: <20201118220731.925424-2-samitolvanen@google.com> Mime-Version: 1.0 References: <20201118220731.925424-1-samitolvanen@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog Subject: [PATCH v7 01/17] tracing: move function tracer options to Kconfig From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt , Will Deacon Cc: Josh Poimboeuf , Peter Zijlstra , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Sami Tolvanen Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Move function tracer options to Kconfig to make it easier to add new methods for generating __mcount_loc, and to make the options available also when building kernel modules. Note that FTRACE_MCOUNT_USE_* options are updated on rebuild and therefore, work even if the .config was generated in a different environment. Signed-off-by: Sami Tolvanen --- Makefile | 20 ++++++++------------ kernel/trace/Kconfig | 16 ++++++++++++++++ scripts/Makefile.build | 6 ++---- 3 files changed, 26 insertions(+), 16 deletions(-) diff --git a/Makefile b/Makefile index e2c3f65c4721..8c8feb4245a6 100644 --- a/Makefile +++ b/Makefile @@ -851,12 +851,8 @@ KBUILD_CFLAGS += $(DEBUG_CFLAGS) export DEBUG_CFLAGS ifdef CONFIG_FUNCTION_TRACER -ifdef CONFIG_FTRACE_MCOUNT_RECORD - # gcc 5 supports generating the mcount tables directly - ifeq ($(call cc-option-yn,-mrecord-mcount),y) - CC_FLAGS_FTRACE += -mrecord-mcount - export CC_USING_RECORD_MCOUNT := 1 - endif +ifdef CONFIG_FTRACE_MCOUNT_USE_CC + CC_FLAGS_FTRACE += -mrecord-mcount ifdef CONFIG_HAVE_NOP_MCOUNT ifeq ($(call cc-option-yn, -mnop-mcount),y) CC_FLAGS_FTRACE += -mnop-mcount @@ -864,6 +860,12 @@ ifdef CONFIG_FTRACE_MCOUNT_RECORD endif endif endif +ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT + ifdef CONFIG_HAVE_C_RECORDMCOUNT + BUILD_C_RECORDMCOUNT := y + export BUILD_C_RECORDMCOUNT + endif +endif ifdef CONFIG_HAVE_FENTRY ifeq ($(call cc-option-yn, -mfentry),y) CC_FLAGS_FTRACE += -mfentry @@ -873,12 +875,6 @@ endif export CC_FLAGS_FTRACE KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) KBUILD_AFLAGS += $(CC_FLAGS_USING) -ifdef CONFIG_DYNAMIC_FTRACE - ifdef CONFIG_HAVE_C_RECORDMCOUNT - BUILD_C_RECORDMCOUNT := y - export BUILD_C_RECORDMCOUNT - endif -endif endif # We trigger additional mismatches with less inlining diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index a4020c0b4508..927ad004888a 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -595,6 +595,22 @@ config FTRACE_MCOUNT_RECORD depends on DYNAMIC_FTRACE depends on HAVE_FTRACE_MCOUNT_RECORD +config FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY + bool + depends on FTRACE_MCOUNT_RECORD + +config FTRACE_MCOUNT_USE_CC + def_bool y + depends on $(cc-option,-mrecord-mcount) + depends on !FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY + depends on FTRACE_MCOUNT_RECORD + +config FTRACE_MCOUNT_USE_RECORDMCOUNT + def_bool y + depends on !FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY + depends on !FTRACE_MCOUNT_USE_CC + depends on FTRACE_MCOUNT_RECORD + config TRACING_MAP bool depends on ARCH_HAVE_NMI_SAFE_CMPXCHG diff --git a/scripts/Makefile.build b/scripts/Makefile.build index ae647379b579..2175ddb1ee0c 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -178,8 +178,7 @@ cmd_modversions_c = \ fi endif -ifdef CONFIG_FTRACE_MCOUNT_RECORD -ifndef CC_USING_RECORD_MCOUNT +ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl ifdef BUILD_C_RECORDMCOUNT ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") @@ -206,8 +205,7 @@ recordmcount_source := $(srctree)/scripts/recordmcount.pl endif # BUILD_C_RECORDMCOUNT cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \ $(sub_cmd_record_mcount)) -endif # CC_USING_RECORD_MCOUNT -endif # CONFIG_FTRACE_MCOUNT_RECORD +endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT ifdef CONFIG_STACK_VALIDATION ifneq ($(SKIP_STACK_VALIDATION),1)