linux-kernel - [PATCH RFC 14/43] x86/Kconfig: Introduce new Kconfig for PIE kernel building

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Message-Id: <eb37d48389009b6287a220734822c9c04cea03d5.1682673543.git.houwenlong.hwl@antgroup.com>
Date:   Fri, 28 Apr 2023 17:50:54 +0800
From:   "Hou Wenlong" <houwenlong.hwl@...group.com>
To:     linux-kernel@...r.kernel.org
Cc:     "Thomas Garnier" <thgarnie@...omium.org>,
        "Lai Jiangshan" <jiangshan.ljs@...group.com>,
        "Kees Cook" <keescook@...omium.org>,
        "Hou Wenlong" <houwenlong.hwl@...group.com>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        "Ingo Molnar" <mingo@...hat.com>, "Borislav Petkov" <bp@...en8.de>,
        "Dave Hansen" <dave.hansen@...ux.intel.com>, <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH RFC 14/43] x86/Kconfig: Introduce new Kconfig for PIE kernel building

Add a new Kconfig to control the behaviour of PIE building, and disable
it now.

Suggested-by: Lai Jiangshan <jiangshan.ljs@...group.com>
Signed-off-by: Hou Wenlong <houwenlong.hwl@...group.com>
Cc: Thomas Garnier <thgarnie@...omium.org>
Cc: Kees Cook <keescook@...omium.org>
---
 arch/x86/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c94297369448..68e5da464b96 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2208,6 +2208,10 @@ config RELOCATABLE
 	  it has been loaded at and the compile time physical address
 	  (CONFIG_PHYSICAL_START) is used as the minimum location.
 
+config X86_PIE
+	def_bool n
+	depends on X86_64
+
 config RANDOMIZE_BASE
 	bool "Randomize the address of the kernel image (KASLR)"
 	depends on RELOCATABLE
-- 
2.31.1