[U-Boot] [PATCH] common: fit: Allow U-Boot images to be booted

[Tom Rini]

On Mon, Jul 18, 2016 at 02:05:42PM +0200, Mario Six wrote:

> In certain circumstances it comes in handy to be able to boot into a second
> U-Boot. But as of now it is not possible to boot a U-Boot binary that is inside
> a FIT image, which is problematic for projects that e.g. need to guarantee a
> unbroken chain of trust from SOC all the way into the OS, since the FIT signing
> mechanism cannot be used.
> 
> This patch adds the capability to load such FIT images.
> 
> An example its snippet (utilizing signature verification) might look like the
> following:
> 
> images {
> 	kernel at 1 {
> 		description = "2nd stage U-Boot image";
> 		data = /incbin/("u-boot-dtb.img.gz");
> 		type = "kernel";
> 		arch = "arm";
> 		os = "u-boot";
> 		compression = "gzip";
> 		load = <0x8FFFC0>;
> 		entry = <0x900000>;
> 		signature at 1 {
> 			algo = "sha256,rsa4096";
> 			key-name-hint = "key";
> 		};
> 	};
> };
> 
> Signed-off-by: Mario Six <mario.six at gdsys.cc>

Reviewed-by: Tom Rini <trini at konsulko.com>

-- 
Tom
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