Questions about Fiasco.OC scheduler and L4Linux

Adam Lackorzynski adam at os.inf.tu-dresden.de
Sun Apr 2 23:50:55 CEST 2017


On Fri Mar 31, 2017 at 08:07:00 +0000, Marc CHALAND wrote:
> Le jeu. 30 mars 2017 à 23:54, Adam Lackorzynski <adam at os.inf.tu-dresden.de>
> a écrit :
> 
> >
> > > a7 hangs exactly at that
> > > point. Any idea to fix this ?
> >
> > Multiple. You need to make sure that u-boot boots you non-secure
> > (there's no hyp-mode on the secure side). u-boot needs to be enabled for
> > that functionality. It hopefully is.
> > Make sure to use the uimage variant and boot with bootm.
> > Also set "setenv bootm_boot_mode nonsec" to override a possible wrong
> > default for this case here. Does this help already?
> 
> 
> I've tried unsec boot mode, but second core doesn't start. I guess this is
> also something with the switch to hyp stuff.

Good point. Probably other cores are booted into secure mode by u-boot,
so we'd need to switching code ourselves.

> Is it possible to have "detached" threads (like l4linux ones) on this linux
> ?

No.



Adam



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