linux-kernel - Re: [RFC/PATCH 2/3] arm: Add ARCH_WANT_OF

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Message-Id: <20140212164907.0E958C407C9@trevor.secretlab.ca>
Date:	Wed, 12 Feb 2014 16:49:07 +0000
From:	Grant Likely <grant.likely@...aro.org>
To:	Laura Abbott <lauraa@...eaurora.org>,
	Rob Herring <robh+dt@...nel.org>, Arnd Bergmann <arnd@...db.de>
Cc:	Laura Abbott <lauraa@...eaurora.org>, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Kumar Gala <galak@...eaurora.org>,
	Kees Cook <keescook@...omium.org>
Subject: Re: [RFC/PATCH 2/3] arm: Add ARCH_WANT_OF_RANDOMNESS

On Tue, 11 Feb 2014 17:33:24 -0800, Laura Abbott <lauraa@...eaurora.org> wrote:
> The stack canary for ARM is currently the same across reboots
> due to lack of randomness early enough. Add ARCH_WANT_OF_RANDOMNESS
> to allow devices to add whatever randomness they need.
> 
> Signed-off-by: Laura Abbott <lauraa@...eaurora.org>

Do you have a draft patch for a user of this yet?

g.

> ---
>  arch/arm/Kconfig              |    3 +++
>  arch/arm/kernel/vmlinux.lds.S |    1 +
>  2 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index e254198..7ab0db1 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -222,6 +222,9 @@ config NEED_RET_TO_USER
>  config ARCH_MTD_XIP
>  	bool
>  
> +config ARCH_WANT_OF_RANDOMNESS
> +	def_bool n
> +
>  config VECTORS_BASE
>  	hex
>  	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
> diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
> index 7bcee5c..2198258 100644
> --- a/arch/arm/kernel/vmlinux.lds.S
> +++ b/arch/arm/kernel/vmlinux.lds.S
> @@ -202,6 +202,7 @@ SECTIONS
>  		INIT_SETUP(16)
>  		INIT_CALLS
>  		CON_INITCALL
> +		EARLY_RANDOM_FUNCS
>  		SECURITY_INITCALL
>  		INIT_RAM_FS
>  	}
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> hosted by The Linux Foundation
> 

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