linux-kernel - Re: [PATCH] ARM: Kconfig: improve ARM_SINGLE

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Message-ID: <db427a15-231b-957e-3690-73373fec55ea@arm.com>
Date:   Fri, 3 Dec 2021 09:30:39 +0000
From:   Vladimir Murzin <vladimir.murzin@....com>
To:     Giulio Benetti <giulio.benetti@...ettiengineering.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Ard Biesheuvel <ardb@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Mike Rapoport <rppt@...nel.org>,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: Re: [PATCH] ARM: Kconfig: improve ARM_SINGLE_ARMV7M description with
 Cortex M7

On 12/2/21 10:20 PM, Giulio Benetti wrote:
> ARM_SINGLE_ARMV7M implies Arm Cortex M7 too, so let's add it to
> description with M0/M3/M4.

Well it also implies M33 and M55. I'd suggest drop specific implementations
from description - so we do not need to update it each time new compatible
core is released. To account newest cores like M33 and M55 you can rephrase
to:
- ARMv7-M/v8-M
- ARMv7-M and above

Cheers
Vladimir

> 
> Signed-off-by: Giulio Benetti <giulio.benetti@...ettiengineering.com>
> ---
>  arch/arm/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index c2724d986fa0..67efbde70e34 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -329,7 +329,7 @@ config ARCH_MULTIPLATFORM
>  	select USE_OF
>  
>  config ARM_SINGLE_ARMV7M
> -	bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
> +	bool "ARMv7-M based platforms (Cortex-M0/M3/M4/M7)"
>  	depends on !MMU
>  	select ARM_NVIC
>  	select AUTO_ZRELADDR
>