linux-kernel - Re: [PATCH] firmware_loader: EXTRA_FIRMWARE does not support compressed files

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Message-ID: <29f9b063-96c9-f120-0920-acd088b01b89@infradead.org>
Date:   Mon, 14 Feb 2022 19:30:22 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Luis Chamberlain <mcgrof@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH] firmware_loader: EXTRA_FIRMWARE does not support
 compressed files



On 2/14/22 17:53, Luis Chamberlain wrote:
> On Mon, Feb 14, 2022 at 02:23:11PM -0800, Randy Dunlap wrote:
>> Document in the firmware loader Kconfig help text that firmware image
>> file compression is not supported for builtin EXTRA_FIRMWARE files so
>> that someone does not waste time trying that.
>>
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Cc: Luis Chamberlain <mcgrof@...nel.org>
>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> Cc: "Rafael J. Wysocki" <rafael@...nel.org>
>> ---
>> Yeah, I wasted some time trying to use an xz compressed file
>> as builtin EXTRA_FIRMWARE, 
> 
> Curious *why* you are using EXTRA_FIRMWARE BTW.

Hi Luis,

I need to load i915 firmware very early
and I am not using an initramfs.

>> so try to prevent someone else from
>> doing that.
> 
> Acked-by: Luis Chamberlain <mcgrof@...nel.org>

Thanks.

>   Luis
>>
>>  drivers/base/firmware_loader/Kconfig |    5 +++++
>>  1 file changed, 5 insertions(+)
>>
>> --- linux-next-20220214.orig/drivers/base/firmware_loader/Kconfig
>> +++ linux-next-20220214/drivers/base/firmware_loader/Kconfig
>> @@ -60,6 +60,8 @@ config EXTRA_FIRMWARE
>>  	  image since it combines both GPL and non-GPL work. You should
>>  	  consult a lawyer of your own before distributing such an image.
>>  
>> +	  NOTE: Compressed files are not supported in EXTRA_FIRMWARE.
>> +
>>  config EXTRA_FIRMWARE_DIR
>>  	string "Firmware blobs root directory"
>>  	depends on EXTRA_FIRMWARE != ""
>> @@ -169,6 +171,9 @@ config FW_LOADER_COMPRESS
>>  	  be compressed with either none or crc32 integrity check type (pass
>>  	  "-C crc32" option to xz command).
>>  
>> +	  Compressed firmware support does not apply to firmware images
>> +	  that are built into the kernel image (CONFIG_EXTRA_FIRMWARE).
>> +
>>  config FW_CACHE
>>  	bool "Enable firmware caching during suspend"
>>  	depends on PM_SLEEP

-- 
~Randy