linux-kernel - [PATCH] arm64: enable kernel command line concatenation

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Date:   Thu, 11 Aug 2022 19:11:27 -0400
From:   "George G. Davis" <george_davis@...tor.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        "moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
CC:     <george_davis@...tor.com>,
        "George G. Davis" <davis.george@...mens.com>
Subject: [PATCH] arm64: enable kernel command line concatenation

From: "George G. Davis" <davis.george@...mens.com>

Enable CONFIG_CMDLINE to extend the boot loader supplied cmdline. This
can then be used in config fragments to set command line arguments
specific to testing of different kernel config options.

Signed-off-by: George G. Davis <davis.george@...mens.com>
---
 arch/arm64/Kconfig | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 571cc234d0b3..cf4a44cde21b 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -2140,6 +2140,12 @@ config CMDLINE_FROM_BOOTLOADER
 	  the boot loader doesn't provide any, the default kernel command
 	  string provided in CMDLINE will be used.
 
+config CMDLINE_EXTEND
+	bool "Extend bootloader kernel arguments"
+	help
+	  The command-line arguments provided by the boot loader will be
+	  appended to the default kernel command string.
+
 config CMDLINE_FORCE
 	bool "Always use the default kernel command string"
 	help
-- 
2.25.1