linux-kernel - [tip: objtool/core] livepatch: Add CONFIG_KLP

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Message-ID: <176060833027.709179.8455347560606375641.tip-bot2@tip-bot2>
Date: Thu, 16 Oct 2025 09:52:10 -0000
From: "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Petr Mladek <pmladek@...e.com>, Joe Lawrence <joe.lawrence@...hat.com>,
 Josh Poimboeuf <jpoimboe@...nel.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: objtool/core] livepatch: Add CONFIG_KLP_BUILD

The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     7ae60ff0b77f2e741049087a6d1beaf679b91a2c
Gitweb:        https://git.kernel.org/tip/7ae60ff0b77f2e741049087a6d1beaf679b91a2c
Author:        Josh Poimboeuf <jpoimboe@...nel.org>
AuthorDate:    Wed, 17 Sep 2025 09:04:04 -07:00
Committer:     Josh Poimboeuf <jpoimboe@...nel.org>
CommitterDate: Tue, 14 Oct 2025 14:50:18 -07:00

livepatch: Add CONFIG_KLP_BUILD

In preparation for introducing klp-build, add a new CONFIG_KLP_BUILD
option.  The initial version will only be supported on x86-64.

Acked-by: Petr Mladek <pmladek@...e.com>
Tested-by: Joe Lawrence <joe.lawrence@...hat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
 arch/x86/Kconfig         |  1 +
 kernel/livepatch/Kconfig | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index fa3b616..ac96920 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -261,6 +261,7 @@ 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 53d51ed..4c0a9c1 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