linux-kernel - Re: [PATCH v11 04/12] x86/mm: get INVLPGB count max from CPUID

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Message-ID: <20250219182322.GBZ7YhmoQw13Welm_d@fat_crate.local>
Date: Wed, 19 Feb 2025 19:23:22 +0100
From: Borislav Petkov <bp@...en8.de>
To: Rik van Riel <riel@...riel.com>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, peterz@...radead.org,
	dave.hansen@...ux.intel.com, zhengqi.arch@...edance.com,
	nadav.amit@...il.com, thomas.lendacky@....com, kernel-team@...a.com,
	linux-mm@...ck.org, akpm@...ux-foundation.org, jackmanb@...gle.com,
	jannh@...gle.com, mhklinux@...look.com, andrew.cooper3@...rix.com,
	Manali Shukla <Manali.Shukla@....com>
Subject: Re: [PATCH v11 04/12] x86/mm: get INVLPGB count max from CPUID

On Wed, Feb 19, 2025 at 12:52:56PM -0500, Rik van Riel wrote:
> Should I modify get_cpu_cap() to store
> c->x86_capabilities[CPUID_8000_0008_EDX] ?
> 
> Currently only the EBX data is stored there,
> while invlpgb_count_max comes from EDX.

No, you should simply assign invlpgb_count_max there.

-- 
Regards/Gruss,
    Boris.

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