From mboxrd@z Thu Jan  1 00:00:00 1970
From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Thu, 11 Mar 2021 21:25:26 +0100
Subject: [PATCH 2/6] efi_loader: Add device path related functions for
 initrd via Boot####
In-Reply-To: <YEoboPF3Ng2kW1Mh@apalos.home>
References: <20210305222303.2866284-1-ilias.apalodimas@linaro.org>
 <20210305222303.2866284-2-ilias.apalodimas@linaro.org>
 <3b72f7c0-5fc5-5dc9-c93f-43c40de9bdd4@gmx.de> <YEnelLeeLrnZYwcl@apalos.home>
 <3c7bca26-b4d6-88c5-611a-aaca1f224d39@gmx.de> <YEoApCa+XLG7HdvJ@apalos.home>
 <70AA1ED8-9F73-4D50-891A-1FCB855F7094@gmx.de> <YEoboPF3Ng2kW1Mh@apalos.home>
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On 3/11/21 2:31 PM, Ilias Apalodimas wrote:
>> I am not referring to efidebug.
>>
>> The user can update EFI variables with any binary content using an EFI binary or OS functions.
>>
>> E.g. copy a binary file to the efi variables file system in Linux.
>
> Right, I was mostly thinking SetVariable which still goes through u-boot.
> Copying an entire file is possiible though I guess

dd if=foo
of=/sys/firmware/efi/efivars/Boot0123-8be4df61-93ca-11d2-aa0d-00e098032b8c

But Linux makes some consistency checks.

Best regards

Heinrich