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

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Message-ID: <13fd02ce-ed18-4499-9b55-367ea69cbe31@arm.com>
Date: Tue, 11 Jun 2024 15:46:35 +0530
From: Dev Jain <dev.jain@....com>
To: Ryan Roberts <ryan.roberts@....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 6/7/24 17:04, Ryan Roberts wrote:
> 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?


Indeed, the handling of these parameters completely resides in

generic mm; I'll send a separate patch and CC Andrew. And yes,

IA-64 was removed, but still has some mentions remaining

throughout the tree :)

>
>>   			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