Messages in this thread | | | Date | Sat, 28 Feb 2015 17:44:13 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH 08/10] ARM: dts: n900: Enable omap sham and include directly omap34xx.dtsi |
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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.rohar@gmail.com>
Acked-by: Pavel Machek <pavel@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";
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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