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SubjectRe: [PATCH v3] firmware_loader: Add debug message with checksum for FW file
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On 3/8/2023 2:17 AM, Russ Weight wrote:
>
>
> On 3/2/23 10:46, Amadeusz Sławiński wrote:
>> Enable dynamic-debug logging of firmware filenames and SHA256 checksums
>> to clearly identify the firmware files that are loaded by the system.
>>
>> Example output:
>> [ 34.944619] firmware_class:_request_firmware: i915 0000:00:02.0: Loaded FW: i915/kbl_dmc_ver1_04.bin, sha256: 2cde41c3e5ad181423bcc3e98ff9c49f743c88f18646af4d0b3c3a9664b831a1
>> [ 48.155884] firmware_class:_request_firmware: snd_soc_avs 0000:00:1f.3: Loaded FW: intel/avs/cnl/dsp_basefw.bin, sha256: 43f6ac1b066e9bd0423d914960fbbdccb391af27d2b1da1085eee3ea8df0f357
>> [ 49.579540] firmware_class:_request_firmware: snd_soc_avs 0000:00:1f.3: Loaded FW: intel/avs/rt274-tplg.bin, sha256: 4b3580da96dc3d2c443ba20c6728d8b665fceb3ed57223c3a57582bbad8e2413
>> [ 49.798196] firmware_class:_request_firmware: snd_soc_avs 0000:00:1f.3: Loaded FW: intel/avs/hda-8086280c-tplg.bin, sha256: 5653172579b2be1b51fd69f5cf46e2bac8d63f2a1327924311c13b2f1fe6e601
>> [ 49.859627] firmware_class:_request_firmware: snd_soc_avs 0000:00:1f.3: Loaded FW: intel/avs/dmic-tplg.bin, sha256: 00fb7fbdb74683333400d7e46925dae60db448b88638efcca0b30215db9df63f
>>
>> Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
>> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
>> ---
>>
>> Changes in v3:
>> * add DYNAMIC_DEBUG and FW_LOADER as dependencies before option can be
>> enabled (kernel test robot)
>>
>> Changes in v2:
>> * allocate buffers (Greg)
>> * introduce CONFIG_ option to allow for CONFIG_CRYPTO and CONFIG_CRYPTO_SHA256
>> dependencies without introducing circular dependency (Greg)
>> * add new line between includes and function name (Cezary)
>>
>> ---
>> drivers/base/firmware_loader/Kconfig | 12 +++++++
>> drivers/base/firmware_loader/main.c | 48 +++++++++++++++++++++++++++-
>> 2 files changed, 59 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/base/firmware_loader/Kconfig b/drivers/base/firmware_loader/Kconfig
>> index 5166b323a0f8..a2f8f75e0718 100644
>> --- a/drivers/base/firmware_loader/Kconfig
>> +++ b/drivers/base/firmware_loader/Kconfig
>> @@ -3,6 +3,7 @@ menu "Firmware loader"
>>
>> config FW_LOADER
>> tristate "Firmware loading facility" if EXPERT
>> + select FW_LOADER_DEBUG if DYNAMIC_DEBUG
>> default y
>> help
>> This enables the firmware loading facility in the kernel. The kernel
>> @@ -24,6 +25,17 @@ config FW_LOADER
>> You also want to be sure to enable this built-in if you are going to
>> enable built-in firmware (CONFIG_EXTRA_FIRMWARE).
>>
>> +config FW_LOADER_DEBUG
>> + bool "Additional debug logs"
>
> This is the prompt that shows up when I do "make menuconfig". How about
> something more descriptive?
>
> "Log filenames and checksums for loaded firmware"
>
>> + depends on DYNAMIC_DEBUG
>> + depends on FW_LOADER
>> + depends on CRYPTO
>> + depends on CRYPTO_SHA256
>> + default FW_LOADER
>> + help
>> + Select this if additional information about loaded firmware file in
>> + form of sha256sum should be dumped.
>
> How about:
>
> "Select this option to log firmware filenames and SHA256 checksums to the
> kernel log for each firmware file that is loaded."
>
> Thanks,
> - Russ
>

Thanks! I've send v4, adjusted sentence a bit to mention that it
requires dynamic debug, so that user is not confused why no messages
shows even if option is enabled.

Amadeusz

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