[U-Boot] [linux-sunxi] Re: [PATCH 0/9] ARMv7: add PSCI support to u-boot

[Christoffer Dall]

On Fri, Nov 22, 2013 at 02:30:27PM +0530, Anup Patel wrote:
> On Fri, Nov 22, 2013 at 2:12 PM, Ian Campbell <ijc at hellion.org.uk> wrote:
> > On Fri, 2013-11-22 at 09:28 +0530, Anup Patel wrote:
> >> An Independent binary of a secured firmware makes more sense here.
> >> Also, if secured firmware is an independent binary then it need not be
> >> open source.
> >
> > In which case it should/can not have anything to do with u-boot nor
> > reuse any GPL'd u-boot code. The platform should supply the PSCI service
> > itself if you want to do this.
> >
> > I for one don't see this as an advantage.
> 
> Further, independent secure firmware can be also used by UEFI or other
> bootloaders.
> 
> For now we just need secure firmware loading service from u-boot, which
> is what this patchset does.
> 
As I see it this patchset seeks to provide (and does a good job of it)
you with PSCI services on platforms where you don't already have this,
so you avoid having to implement yet another platform-specific SMP
boot-up sequence in the kernel.  This is not about providing any generic
support for secure firmware.

Ideally, the platform would just ship with PSCI support and boot U-Boot
in Hyp mode and everyone would be happy - whichever way vendors wish to
do that is a completely different discussion than this patch set.

-Christoffer