Hi Igor, On Wed, 5 May 2021 at 06:58, Igor Opaniuk <[email protected]> wrote: > > Hi Simon, > > On Thu, Apr 29, 2021 at 7:10 PM Simon Glass <[email protected]> wrote: > > > > Hi Igor, > > > > On Fri, 16 Apr 2021 at 01:10, Igor Opaniuk <[email protected]> > > wrote: > > > > > > From: Igor Opaniuk <[email protected]> > > > > > > Introduce RSA_SOFTWARE_EXP_TINY Kconfig option, which does not require > > > DM to be enabled. This can be handy on devices, where SPL + signed > > > U-Boot FIT image setup is used, where it isn't possible to enable SPL_DM > > > mainly due to SRAM size constraits. > > > > > > For example, on iMX8MM with this option enabled and SPL_DM disabled > > > it's possible to save almost 11Kb: > > > > That seems a lot...do you have OF_PLATDATA enabled? > Nope, it's not enabled.
I think you should look at that first. It is likely to give a much larger benefit. > I've managed to get these numbers when experimenting with NXP U-Boot fork, > which is based on 2020.04. > > I also checked a while ago iMX6ULL mainline U-Boot with this patch, and size > decrease was around 4-5 Kb, which basically is also not bad (considering 64Kb > SPL size limitation for this SoC). OK I see, but if we did this with every subsystem won't we end up with chaos? There will be cases where driver model is impossible, but with 64KB (which I assume you mean) I would hope that we could avoid it. > > > > > > > > > With RSA_SOFTWARE_EXP_TINY enabled: > > > spl/u-boot-spl-nodtb.bin 99824 > > > > > > Without: > > > spl/u-boot-spl-nodtb.bin 111088 > > > > > > Signed-off-by: Igor Opaniuk <[email protected]> > > > --- > > > > > > lib/rsa/Kconfig | 11 ++++++++++- > > > lib/rsa/rsa-verify.c | 8 ++++---- > > > 2 files changed, 14 insertions(+), 5 deletions(-) Regards, Simon
