linux-kernel - Re: [PATCH] Documentation: Add ARM64 for reserving ZONE

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Date: Fri, 7 Jun 2024 12:34:42 +0100
From: Ryan Roberts <ryan.roberts@....com>
To: Dev Jain <dev.jain@....com>, linux-arm-kernel@...ts.infradead.org,
 catalin.marinas@....com, will@...nel.org, corbet@....net,
 linux-doc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, mark.rutland@....com,
 suzuki.poulose@....com, broonie@...nel.org, James.Morse@....com,
 Anshuman.Khandual@....com
Subject: Re: [PATCH] Documentation: Add ARM64 for reserving ZONE_MOVABLE

On 04/06/2024 06:28, Dev Jain wrote:
> kernelcore and movablecore kernel command line works for ARM64. Update
> the Documentation to reflect the same.
> 
> Signed-off-by: Dev Jain <dev.jain@....com>
> ---
>  Documentation/admin-guide/kernel-parameters.txt | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index b600df82669d..7282d6057e32 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2544,7 +2544,7 @@
>  
>  	keepinitrd	[HW,ARM] See retain_initrd.
>  
> -	kernelcore=	[KNL,X86,IA-64,PPC,EARLY]
> +	kernelcore=	[KNL,X86,IA-64,PPC,ARM64,EARLY]

Given these are both arch-agnostic parameters, wouldn't the correct change be to
remove all the arch-specific labels, i.e. [KNL,EARLY]? In fact, wasn't IA-64
removed from the kernel?

>  			Format: nn[KMGTPE] | nn% | "mirror"
>  			This parameter specifies the amount of memory usable by
>  			the kernel for non-movable allocations.  The requested
> @@ -3612,7 +3612,7 @@
>  	mousedev.yres=	[MOUSE] Vertical screen resolution, used for devices
>  			reporting absolute coordinates, such as tablets
>  
> -	movablecore=	[KNL,X86,IA-64,PPC,EARLY]
> +	movablecore=	[KNL,X86,IA-64,PPC,ARM64,EARLY]
>  			Format: nn[KMGTPE] | nn%
>  			This parameter is the complement to kernelcore=, it
>  			specifies the amount of memory used for migratable