linux-kernel - Re: [PATCH v2 2/5] ARM: mstar: Add machine for MStar/Sigmastar infinity/mercury family ARMv7 SoCs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <f66978d8-22c5-1883-c6bf-52c0c19d6603@suse.de>
Date:   Thu, 11 Jun 2020 14:58:50 +0200
From:   Andreas Färber <afaerber@...e.de>
To:     Daniel Palmer <daniel@...f.com>
Cc:     k@...ko.eu, tim.bird@...y.com, devicetree@...r.kernel.org,
        Daniel Palmer <daniel@...ngy.jp>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Sam Ravnborg <sam@...nborg.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Heiko Stuebner <heiko.stuebner@...obroma-systems.com>,
        Maxime Ripard <mripard@...nel.org>,
        Lubomir Rintel <lkundrak@...sk>,
        Stephan Gerhold <stephan@...hold.net>,
        Mark Brown <broonie@...nel.org>, allen <allen.chen@....com.tw>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jonathan Corbet <corbet@....net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>, Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Doug Anderson <armlinux@...isordat.com>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Gregory Fong <gregory.0xf0@...il.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Christian Lamparter <chunkeey@...il.com>,
        Nathan Huckleberry <nhuck15@...il.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/5] ARM: mstar: Add machine for MStar/Sigmastar
 infinity/mercury family ARMv7 SoCs

Am 10.06.20 um 11:04 schrieb Daniel Palmer:
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 59fde2d598d8..e7f4ca060c0f 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -197,6 +197,7 @@ machine-$(CONFIG_ARCH_MXC)		+= imx
>   machine-$(CONFIG_ARCH_MEDIATEK)		+= mediatek
>   machine-$(CONFIG_ARCH_MILBEAUT)		+= milbeaut
>   machine-$(CONFIG_ARCH_MXS)		+= mxs
> +machine-$(CONFIG_ARCH_MSTARV7)		+= mstar
>   machine-$(CONFIG_ARCH_NOMADIK)		+= nomadik
>   machine-$(CONFIG_ARCH_NPCM)		+= npcm
>   machine-$(CONFIG_ARCH_NSPIRE)		+= nspire
> diff --git a/arch/arm/mach-mstar/Kconfig b/arch/arm/mach-mstar/Kconfig
> new file mode 100644
> index 000000000000..6235d0a7860a
> --- /dev/null
> +++ b/arch/arm/mach-mstar/Kconfig
> @@ -0,0 +1,26 @@
> +menuconfig ARCH_MSTARV7

You call the dir mach-mstar, but name the Kconfig ARCH_MSTARV7. I had 
previously been asked to just use the vendor name, so this should 
probably be just ARCH_MSTAR. Outside arch/arm/ you can then use ARM && 
ARCH_MSTAR condition to make things 32-bit only, allowing to reuse 
ARCH_MSTAR for arm64 or whatever.

> +	bool "MStar/Sigmastar ARMv7 SoC Support"
> +	depends on ARCH_MULTI_V7
> +	select ARM_GIC
> +	select ARM_HEAVY_MB
> +	help
> +	  Support for newer MStar/Sigmastar SoC families that are
> +	  based on ARMv7 cores like the Cortex A7 and share the same
> +	  basic hardware like the infinity and mercury series.
> +
> +if ARCH_MSTARV7
> +
> +config MACH_INFINITY
> +	bool "MStar/Sigmastar infinity SoC support"
> +	default ARCH_MSTARV7
> +	help
> +	  Support for MStar/Sigmastar infinity IP camera SoCs.
> +
> +config MACH_MERCURY
> +	bool "MStar/Sigmastar mercury SoC support"
> +	default ARCH_MSTARV7
> +	help
> +	  Support for MStar/Sigmastar mercury dash camera SoCs.
> +	  Note that older Mercury2 SoCs are ARM9 based and not supported.

Is this comment really helpful? This menu item would only seem to come 
up after having selected multi_v7, which kind of rules out ARM9.

Consider adding mercury in a second step?

> +
> +endif

Regards,
Andreas

-- 
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Felix Imendörffer
HRB 36809 (AG Nürnberg)