linux-kernel - Re: [RFC PATCH v4 2/8] x86/mm: enable BROADCAST_TLB

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Message-ID: <5otrbzjvvz7zvqtfdoulm455jj4ut5fzjmsfzjyjkljcc2jp2s@2ealtckhzxow>
Date: Thu, 26 Jun 2025 16:08:27 +0300
From: "Kirill A. Shutemov" <kirill@...temov.name>
To: Rik van Riel <riel@...riel.com>
Cc: linux-kernel@...r.kernel.org, kernel-team@...a.com, 
	dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org, bp@...en8.de, 
	x86@...nel.org, nadav.amit@...il.com, seanjc@...gle.com, tglx@...utronix.de, 
	mingo@...nel.org, Rik van Riel <riel@...com>
Subject: Re: [RFC PATCH v4 2/8] x86/mm: enable BROADCAST_TLB_FLUSH on Intel,
 too

On Thu, Jun 19, 2025 at 04:03:54PM -0400, Rik van Riel wrote:
> From: Rik van Riel <riel@...com>
> 
> Much of the code for Intel RAR and AMD INVLPGB is shared.
> 
> Place both under the same config option.
> 
> Signed-off-by: Rik van Riel <riel@...riel.com>
> ---
>  arch/x86/Kconfig.cpu | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
> index f928cf6e3252..ab763f69f54d 100644
> --- a/arch/x86/Kconfig.cpu
> +++ b/arch/x86/Kconfig.cpu
> @@ -360,7 +360,7 @@ menuconfig PROCESSOR_SELECT
>  
>  config BROADCAST_TLB_FLUSH
>  	def_bool y
> -	depends on CPU_SUP_AMD && 64BIT
> +	depends on (CPU_SUP_AMD || CPU_SUP_INTEL) && 64BIT && SMP

Maybe split it into few "depends on"?

	depends on 64BIT
	depends on SMP
	depends on CPU_SUP_AMD || CPU_SUP_INTEL

-- 
  Kiryl Shutsemau / Kirill A. Shutemov