From patchwork Sun Jul 14 08:27:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naveen N Rao X-Patchwork-Id: 13732627 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B01B2282FD; Sun, 14 Jul 2024 08:30:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720945807; cv=none; b=mgElkWqMAazC/aJzECL/CMHk18mcM3IRYUfEP+rvdJtoNNJDMM/QiLKoaVZq6kZ8SX++L5qyfelP4Nl17/lqp1BNH0aKVaR3n7QXmWgwcdUlCJZMo/3ERr9Oi3h4K+xfT53PwqYigWTbULv9htP3r4bg0iJJRPWj5g3gwuES7W8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720945807; c=relaxed/simple; bh=LpYS83WLCwfoYEIrkASmAZU4pJqGiVpUR3z2uaU37Ro=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TMEnKFvP4v8gkWN70nhAw9H2/pzec/E4dsFcUs/InyBM6jhtapMyv6Bb519Dsm5pgRD0X+OQJ+HoYoED+VBpT7DHTAV6lwvQhWrEiYdnLsPZHEifjww7Dcesdq4mPUbIXXBBXrz6mPsedlqK2IxfeFf7GJ2PUyEN16tV4F1qPUw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XJqJsGGi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XJqJsGGi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7DA1EC116B1; Sun, 14 Jul 2024 08:30:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720945807; bh=LpYS83WLCwfoYEIrkASmAZU4pJqGiVpUR3z2uaU37Ro=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XJqJsGGit09XBqOHB5LEw6ZRLHjyamWhzZwHwa7PgA8oYEFGYK2DUyoetxnyZpgOr EvFtbYl/fTNqBnpu7kb3xvD2KQ7l41z97Wkixno4IFocFyufkxyulnYEBjTWLyQ8Lu 2iFj4qhy7hsFZtZYg4Mt0TI5eNwPG8NfEdxz4LMoUup9f9QiJHaGIdQSvZKKordgI6 rgJ1fjgHkaz0brF9NSj8Z8el0w1iU+gvPDiaTgjUcxzjfPE+r6xscrBjER1EegqwMo OPTzQ+qXjavbeVMYXZvMl8xBUqNgRCl9YmXRIFXfqbCaS+gMRAaL0472Q6SC4jWAEa rU1TmANJEvDZA== From: Naveen N Rao To: , , , linux-kbuild@vger.kernel.org, Cc: Michael Ellerman , Nicholas Piggin , Christophe Leroy , Steven Rostedt , Masami Hiramatsu , Mark Rutland , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Masahiro Yamada , Hari Bathini , Mahesh Salgaonkar , Vishal Chourasia Subject: [RFC PATCH v4 01/17] powerpc/trace: Account for -fpatchable-function-entry support by toolchain Date: Sun, 14 Jul 2024 13:57:37 +0530 Message-ID: <12d7c105aea999faa4bcdac8587b3a2899da3461.1720942106.git.naveen@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 So far, we have relied on the fact that gcc supports both -mprofile-kernel, as well as -fpatchable-function-entry, and clang supports neither. Our Makefile only checks for CONFIG_MPROFILE_KERNEL to decide which files to build. Clang has a feature request out [*] to implement -fpatchable-function-entry, and is unlikely to support -mprofile-kernel. Update our Makefile checks so that we pick up the correct files to build once clang picks up support for -fpatchable-function-entry. [*] https://github.com/llvm/llvm-project/issues/57031 Signed-off-by: Naveen N Rao --- arch/powerpc/kernel/trace/Makefile | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/kernel/trace/Makefile b/arch/powerpc/kernel/trace/Makefile index 125f4ca588b9..d6c3885453bd 100644 --- a/arch/powerpc/kernel/trace/Makefile +++ b/arch/powerpc/kernel/trace/Makefile @@ -9,12 +9,15 @@ CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE) CFLAGS_REMOVE_ftrace_64_pg.o = $(CC_FLAGS_FTRACE) endif -obj32-$(CONFIG_FUNCTION_TRACER) += ftrace.o ftrace_entry.o -ifdef CONFIG_MPROFILE_KERNEL -obj64-$(CONFIG_FUNCTION_TRACER) += ftrace.o ftrace_entry.o +ifdef CONFIG_FUNCTION_TRACER +obj32-y += ftrace.o ftrace_entry.o +ifeq ($(CONFIG_MPROFILE_KERNEL)$(CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY),) +obj64-y += ftrace_64_pg.o ftrace_64_pg_entry.o else -obj64-$(CONFIG_FUNCTION_TRACER) += ftrace_64_pg.o ftrace_64_pg_entry.o +obj64-y += ftrace.o ftrace_entry.o endif +endif + obj-$(CONFIG_TRACING) += trace_clock.o obj-$(CONFIG_PPC64) += $(obj64-y)