On Saturday 07 December 2013 14:48:20 Sebastian Reichel wrote: > On Sat, Dec 07, 2013 at 09:18:32AM +0100, Pali Rohár wrote: > > On Saturday 07 December 2013 01:00:27 Sebastian Reichel wrote: > > > On Fri, Dec 06, 2013 at 02:27:25PM -0800, Tony Lindgren wrote: > > > > * Sebastian Reichel <sre@xxxxxxxxxx> [131206 13:37]: > > > > > Nokia N900 DT boot breaks for me using 3.13-rc3. You > > > > > can see the relevant kernel output below. Disabling > > > > > the AES module in the omap3-n900.dts with status = > > > > > "disabled" fixed the boot for me. > > > > > > > > OK thanks for letting me know. How about the following > > > > patch to fix it? > > > > > > That's basically what I did to fix the problem. > > > > > > I guess the proper fix would be a runtime check if the > > > device can be accessed (if that's possible). AFAIK it is > > > possible to use the AES module on the N900 if the > > > bootloader is slightly patched. > > > > > > Pali, can you elaborate more about this? I've seen, that > > > you added a section about this on [0]. > > > > > > [0] http://elinux.org/N900#M-Shield > > > > > > -- Sebastian > > > > Yes, if you want to use M-Shield on Nokia N900, you need to > > use new version of signed Nokia X-Loader which enable > > M-Shield usage outside secure world. > > > > Because this updated X-Loader is not official and I think > > nobody has it in n900, please disable using these M-Shield > > crypto modules on n900. > > Is the updated X-Loader available somewhere? > It was on mediafire server linked from this thread: http://maemo.org/community/maemo-developers/n900_aes_and_sha1-md5_hw_acceleration_drivers/ Now it is deleted from that server, but I have copy on my HDD. > > Without patched updated X-Loader kernel will crash. > > That's what this thread is about :) It might be better to have > a runtime check for the crypto hw's accessability by adding > something like this to the driver's probe function: > > if (!aes_module_is_accessible()) { > dev_err(&pdev->dev, "Usage of OMAP's AES module is > blocked\n"); return -ENODEV; > } > > That would require, that aes_module_is_accessible() can > actually be implemented. > You need to ask that question to somebody who has 1) access to secure M-Shield documentation or 2) author who created that M- Shield driver if your check is possible... > P.S.: I fixed the mail address of Aaro Koskinen. His nokia > mail address doesn't work anymore. > > -- Sebastian -- Pali Rohár pali.rohar@xxxxxxxxx
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