linux-kernel - Re: [PATCH v3 1/3] RAS: Introduce AMD Address Translation Library

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Date:   Mon, 11 Dec 2023 10:28:19 -0500
From:   Yazen Ghannam <yazen.ghannam@....com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     yazen.ghannam@....com, linux-edac@...r.kernel.org,
        linux-kernel@...r.kernel.org, tony.luck@...el.com, x86@...nel.org,
        avadhut.naik@....com, john.allen@....com, william.roche@...cle.com,
        muralidhara.mk@....com
Subject: Re: [PATCH v3 1/3] RAS: Introduce AMD Address Translation Library

On 12/11/2023 9:20 AM, Borislav Petkov wrote:
> On Sun, Dec 10, 2023 at 01:49:30PM -0600, Yazen Ghannam wrote:
>> diff --git a/drivers/ras/amd/atl/Kconfig b/drivers/ras/amd/atl/Kconfig
>> new file mode 100644
>> index 000000000000..fcff387faa33
>> --- /dev/null
>> +++ b/drivers/ras/amd/atl/Kconfig
>> @@ -0,0 +1,41 @@
>> +# SPDX-License-Identifier: GPL-2.0-or-later
>> +#
>> +# AMD Address Translation Library Kconfig
>> +#
>> +# Copyright (c) 2023, Advanced Micro Devices, Inc.
>> +# All Rights Reserved.
>> +#
>> +# Author: Yazen Ghannam <Yazen.Ghannam@....com>
>> +
>> +config AMD_ATL
>> +	tristate "AMD Address Translation Library"
>> +	depends on AMD_NB
>> +	imply AMD_ATL_MOD
>> +	select AMD_ATL_STUB
>> +	default N
>> +	help
>> +	  This library includes support for implementation-specific
>> +	  address translation procedures needed for various error
>> +	  handling cases.
>> +
>> +	  Enable this option if using DRAM ECC on Zen-based systems
>> +	  and OS-based error handling.
>> +
>> +config AMD_ATL_MOD
>> +	tristate "AMD Address Translation Library module"
>> +	depends on X86_64
>> +	default N
>> +	help
>> +	  This option provides the module component of the AMD Address
>> +	  Translation Library. It will be selected automatically if
>> +	  building the library. Minimal dependencies are given to avoid
>> +	  build errors for modules using the library.
>> +
>> +config AMD_ATL_STUB
>> +	bool "AMD Address Translation Library stub"
>> +	default N
>> +	help
>> +	  This option provides minimal built-in code to support the
>> +	  AMD Address Translation Library module. It will be selected
>> +	  automatically if building the library. No dependencies are given
>> +	  to avoid build errors for modules using the library.
> 
> So, provided this stub thing even makes sense (I need to continue
> looking first since this is a huge diff), you don't need the help text
> and the bool prompt: a stub is prompt-less and is selected
> automatically.
> 
> IOW:
> 
> diff --git a/drivers/ras/amd/atl/Kconfig b/drivers/ras/amd/atl/Kconfig
> index fcff387faa33..348498d49b01 100644
> --- a/drivers/ras/amd/atl/Kconfig
> +++ b/drivers/ras/amd/atl/Kconfig
> @@ -32,10 +32,4 @@ config AMD_ATL_MOD
>   	  build errors for modules using the library.
>   
>   config AMD_ATL_STUB
> -	bool "AMD Address Translation Library stub"
> -	default N
> -	help
> -	  This option provides minimal built-in code to support the
> -	  AMD Address Translation Library module. It will be selected
> -	  automatically if building the library. No dependencies are given
> -	  to avoid build errors for modules using the library.
> +	def_bool N
> 

Ah good deal. Better than padding to meet a minimum length. :)

Thanks,
Yazen