linux-kernel - Re: [PATCH v5 11/19] x86: LAM initialization

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Message-ID: <p447gaopwygjg5tjpnom2lpu2v5ozescujqhrkxkca45pc744u@njkdjpdqkorq>
Date: Mon, 8 Sep 2025 10:30:29 +0200
From: Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>
To: Borislav Petkov <bp@...en8.de>
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Subject: Re: [PATCH v5 11/19] x86: LAM initialization

On 2025-09-07 at 00:24:20 +0200, Borislav Petkov wrote:
>On Mon, Aug 25, 2025 at 10:24:36PM +0200, Maciej Wieczor-Retman wrote:
>> diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
>> index bb57e93b4caf..756bd96c3b8b 100644
>> --- a/arch/x86/mm/init.c
>> +++ b/arch/x86/mm/init.c
>> @@ -763,6 +763,9 @@ void __init init_mem_mapping(void)
>>  	probe_page_size_mask();
>>  	setup_pcid();
>>  
>> +	if (boot_cpu_has(X86_FEATURE_LAM) && IS_ENABLED(CONFIG_KASAN_SW_TAGS))
>
>cpu_feature_enabled()
>

Thanks, I'll correct it.

>> +		cr4_set_bits_and_update_boot(X86_CR4_LAM_SUP);
>> +
>>  #ifdef CONFIG_X86_64
>>  	end = max_pfn << PAGE_SHIFT;
>>  #else
>> -- 
>
>Also, for all your patches' subjects and text:
>
>Pls read
>
>https://www.kernel.org/doc/html/latest/process/maintainer-tip.html#patch-subject
>https://www.kernel.org/doc/html/latest/process/maintainer-tip.html#changelog
>
>and fixup.

Thanks, I'll recheck all the patches with that in mind.

>
>Thx.
>
>-- 
>Regards/Gruss,
>    Boris.
>
>https://people.kernel.org/tglx/notes-about-netiquette

-- 
Kind regards
Maciej Wieczór-Retman