From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l1bSJ-0002y7-2X for barebox@lists.infradead.org; Mon, 18 Jan 2021 20:48:56 +0000 Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l1bSH-0001d5-RH for barebox@lists.infradead.org; Mon, 18 Jan 2021 21:48:53 +0100 Received: from mfe by dude02.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1l1bSH-0002Cg-HK for barebox@lists.infradead.org; Mon, 18 Jan 2021 21:48:53 +0100 From: Marco Felsch Date: Mon, 18 Jan 2021 21:48:50 +0100 Message-Id: <20210118204850.8420-2-m.felsch@pengutronix.de> In-Reply-To: <20210118204850.8420-1-m.felsch@pengutronix.de> References: <20210118204850.8420-1-m.felsch@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 2/2] Documentation: blspec: Add blspec fixup documentation To: barebox@lists.infradead.org Document the fixup mechanism. Signed-off-by: Marco Felsch --- 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 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox