linux-kernel - [PATCH] arm64: Support CMDLINE

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Message-Id: <20230320211451.2512800-1-chris.packham@alliedtelesis.co.nz>
Date:   Tue, 21 Mar 2023 10:14:51 +1300
From:   Chris Packham <chris.packham@...iedtelesis.co.nz>
To:     catalin.marinas@....com, will@...nel.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: [PATCH] arm64: Support CMDLINE_EXTEND

Support extending the bootloader provided command line for arm64
targets. This support is already present via generic DT/EFI code the
only thing required is for the architecture to make it selectable.

Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
---
 arch/arm64/Kconfig | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 1023e896d46b..3c837b085f21 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -2228,6 +2228,12 @@ 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
-- 
2.40.0