From mboxrd@z Thu Jan 1 00:00:00 1970 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 A47D634346E; Wed, 17 Sep 2025 16:04:56 +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=1758125096; cv=none; b=rPXlVWapwzPGgXyO8KiKGExA56NlyIEzJ6x7o61rYnDtoTtz5pbP0C/jFqmXzze0rHZ9jtMCfX1NLikaqMMWiGbozZ3Fvkb2ti6NS3tLphWNt98UdxMi1wYz8PxlKdtSWGPK21F0fzxiDng+LtAQT+E+j6y2CpCoqM2MAh7gOMM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758125096; c=relaxed/simple; bh=Pzen81aKxEDLsRdrYrpWtsjdpxscgWBdZGH8jyumvcM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gQPvvuMCcLloUnkkkcLFH43OaqsO1C8PahqgdNJJxFO3vA52VjaGdHR/RtvHrS2woDNWgEDZ7bPJcxhDqHwhPIWZBRNHTtHFtK9MgU/houlU3oVxTXYkSzc7zEpiyucxxvSJWG7Q4mZcwqLJFEqOK0zYtL/5moF6Rc2hSxte1Sk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i8/YHrUn; 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="i8/YHrUn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92806C4CEFB; Wed, 17 Sep 2025 16:04:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758125096; bh=Pzen81aKxEDLsRdrYrpWtsjdpxscgWBdZGH8jyumvcM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i8/YHrUn4RToAMXVN7ms8BSS2jSg7Sz4whadJupEdgg5JfbsiaH13vj7UrEv7lJa7 cXrpPWhGJhPAGKez7IDxm/r6Z4GYEByYuGl54mDzE98vOdB+WKqfR+aEunZv7VLExc bwwcO86wuhbWHKvCwqxKpaT+pkXuZSv+GLc9J327+iUE9W+OJM9h8alN7LZ/NPxS9S 1gnCr8roQKwt1KzNv7bj9nUS3006MtLExWvBnrXMXz3YqF+JIKLioT5IoXY6iwzUFu y2CPddnX+bzyo33HZDMs293gU6vWyKuUiHMUao9p/CB8OWAy7e0ZokCCw+be0nxbLT IB5HUKPU0rWMw== From: Josh Poimboeuf To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, Petr Mladek , Miroslav Benes , Joe Lawrence , live-patching@vger.kernel.org, Song Liu , laokz , Jiri Kosina , Marcos Paulo de Souza , Weinan Liu , Fazla Mehrab , Chen Zhongjin , Puranjay Mohan , Dylan Hatch , Peter Zijlstra Subject: [PATCH v4 56/63] livepatch: Add CONFIG_KLP_BUILD Date: Wed, 17 Sep 2025 09:04:04 -0700 Message-ID: <9240e1a1d47df784cdc2b2f7f0c4126455749843.1758067943.git.jpoimboe@kernel.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In preparation for introducing klp-build, add a new CONFIG_KLP_BUILD option. The initial version will only be supported on x86-64. Signed-off-by: Josh Poimboeuf --- arch/x86/Kconfig | 1 + kernel/livepatch/Kconfig | 12 ++++++++++++ 2 files changed, 13 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 19b1dbc8d5d26..986d31587e999 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -260,6 +260,7 @@ config X86 select HAVE_FUNCTION_ERROR_INJECTION select HAVE_KRETPROBES select HAVE_RETHOOK + select HAVE_KLP_BUILD if X86_64 select HAVE_LIVEPATCH if X86_64 select HAVE_MIXED_BREAKPOINTS_REGS select HAVE_MOD_ARCH_SPECIFIC diff --git a/kernel/livepatch/Kconfig b/kernel/livepatch/Kconfig index 53d51ed619a3d..4c0a9c18d0b25 100644 --- a/kernel/livepatch/Kconfig +++ b/kernel/livepatch/Kconfig @@ -18,3 +18,15 @@ config LIVEPATCH module uses the interface provided by this option to register a patch, causing calls to patched functions to be redirected to new function code contained in the patch module. + +config HAVE_KLP_BUILD + bool + help + Arch supports klp-build + +config KLP_BUILD + def_bool y + depends on LIVEPATCH && HAVE_KLP_BUILD + select OBJTOOL + help + Enable klp-build support -- 2.50.0