On Thu 2015-02-26 14:49:58, Pali Rohár wrote:
> This patch moves content of file omap34xx-hs.dtsi into omap3-n900.dts and
> enable
> omap sham support (omap HW support for SHA + MD5). After testing both omap
> hwmod
> and omap-sham.ko drivers it looks like signed Nokia X-Loader enable L3
> firewall
> for omap sham. There is no kernel crash with both official bootloader and
> crypto
> enable bootloader. So we can safely enable sham code.
>
> Signed-off-by: Pali Rohár <pali.ro...@gmail.com>
Acked-by: Pavel Machek <pa...@ucw.cz>
> +/*
> + * Default secure signed bootloader (Nokia X-Loader) does not enable L3
> firewall
> + * for omap AES HW crypto support. When linux kernel try to access memory of
> AES
When Linux Kernel tries...
> + * blocks then kernel receive "Unhandled fault: external abort on
> non-linefetch"
, the kernel receives
> + * and crash. Until somebody fix omap-aes.c and omap_hwmod_3xxx_data.c code
> (no
and crashes. Until somebody fixes
> + * crash anymore) omap AES support will be disabled for all Nokia N900
> devices.
> + * There is "unofficial" version of bootloader which enables AES in L3
> firewall
firewall,
> + * but it is not widely used and to prevent kernel crash rather AES is
> disabled.
> + * There is also no runtime detection code if AES is disabled in L3
> firewall...
> + */
> +&aes {
> + status = "disabled";
> +};
> +
> / {
> model = "Nokia N900";
> compatible = "nokia,omap3-n900", "ti,omap3430", "ti,omap3";
--
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(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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