Hi! On Sun 2015-02-01 09:56:28, Pali Rohár wrote: > On Sunday 01 February 2015 02:36:06 Matthijs van Duin wrote: > > On 31 January 2015 at 20:06, Pali Rohár <pali.rohar@xxxxxxxxx> > > wrote: > > > I have configured two testing N900 devices. One with signed > > > bootloader which enable omap aes support and one device with > > > signed bootloader which does not enable omap aes support. > > > > I'm probably missing some context here, but why not just use > > the one with aes support? Alternatively, one may argue that > > it's the bootloader's job to provide the kernel with an > > accurate device tree. (Though one may equally well argue that > > it would be nice to avoid having to customize the device tree > > for every feature-flavor of a processor, especially if this > > depends on how it's initialized.) > > > > Nokia X-Loader is closed source and signed. So we cannot modify > it. And it is responsible for configuring L3/L4 firewall. > > Year ago it was possible to find on internet signed X-Loader for > N900 which enable omap aes support (for testing purpose together > with open source linux kernel modules), but it is unofficial and > I think there only too few people who flashed it into N900 nand. > If somebody needs binaries I have backup all of them. > > More info about that aes enabled X-Loader: > http://maemo.org/community/maemo-developers/n900_aes_and_sha1-md5_hw_acceleration_drivers/ > > Majority of users use only official X-Loader which does not > enable aes support so we cannot enable kernel modules (cause > crashes). And also we cannot force users to flash some unofficial > binary into their device... BTW... it would be interesting to know... are you doing some heavy crypto processing on N900? Are the accelerated drivers faster than non-accelerated ones? Because the link above says they are slower... # Eric Wheeler # ... # Hey guys, I have omap-aes compiled for my kernel and appears to be # working. # # I do not understand why non-accelerated software-crypto is faster than # the omap-aes hardware acceleration: # # mmcblk0 onboard 32GB: read=21.76MB/s write=12.97MB/s # aes_generic crypto: read= 8.47 write= 5.54 # omap-aes hw crypto: read= 6.31 write= 5.45 # # mmcblk1 uSD 16GB Class 10: read=16.05MB/s write=16.47MB/s # aes_generic crypto: read= 7.96 write= 7.43 # omap-aes hw crypto: read= 6.67 write= 7.18 Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
