From: Marco Felsch <m.felsch@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 2/2] Documentation: blspec: Add blspec fixup documentation
Date: Mon, 18 Jan 2021 21:48:50 +0100 [thread overview]
Message-ID: <20210118204850.8420-2-m.felsch@pengutronix.de> (raw)
In-Reply-To: <20210118204850.8420-1-m.felsch@pengutronix.de>
Document the fixup mechanism.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
Documentation/user/booting-linux.rst | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/Documentation/user/booting-linux.rst b/Documentation/user/booting-linux.rst
index 60babb513c..fd7575bbe9 100644
--- a/Documentation/user/booting-linux.rst
+++ b/Documentation/user/booting-linux.rst
@@ -232,6 +232,28 @@ device where the entry is found on. This makes it possible to use the same rootf
image on different devices without having to specify a different root= option each
time.
+The following environment variables can be used to update the bootloader spec entry
+values on the fly.
+
+.. warning::
+
+ In most use cases this is not necessary. Modifying the bootloader spec values on
+ the fly can trigger unwanted boot behaviours.
+
++-----------------------------------------+
+| name |
++=========================================+
+| global.blspec.fixup.devicetree |
++-----------------------------------------+
+| global.blspec.fixup.initrd |
++-----------------------------------------+
+| global.blspec.fixup.options |
++-----------------------------------------+
+| global.blspec.fixup.linux |
++-----------------------------------------+
+| global.blspec.fixup.devicetree-overlay |
++-----------------------------------------+
+
Network boot
------------
--
2.20.1
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next prev parent reply other threads:[~2021-01-18 20:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-18 20:48 [PATCH 1/2] blspec: allow board files to overwrite config file settings Marco Felsch
2021-01-18 20:48 ` Marco Felsch [this message]
2021-01-19 11:01 ` Sascha Hauer
2021-01-19 11:42 ` Marco Felsch
2021-01-20 9:03 ` Sascha Hauer
2021-01-20 10:54 ` Marco Felsch
2021-01-20 12:31 ` Michael Olbrich
2021-01-20 13:26 ` Marco Felsch
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