[RFC/PATCH 2/3] arm: Add ARCH_WANT_OF_RANDOMNESS

Grant Likely
2014-02-12T16:49:07Z

On Tue, 11 Feb 2014 17:33:24 -0800, Laura Abbott <lauraa@codeaurora.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@codeaurora.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
> }
> --
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