RISC-V FIT image type

[Bin Meng]

Hi Simon,

On Sat, Apr 1, 2023 at 2:31 PM Simon Glass <sjg at chromium.org> wrote:
>
> Hi Bin,
>
> On Fri, 31 Mar 2023 at 19:22, Bin Meng <bmeng.cn at gmail.com> wrote:
> >
> > On Fri, Mar 31, 2023 at 5:36 AM Simon Glass <sjg at chromium.org> wrote:
> > >
> > > Hi,
> > >
> > > I notice that in image.h we have IH_ARCH_RISCV but no mention of
> > > IH_ARCH_RISCV64. Should we not have two separate image types, as we do
> > > with ARM and x86? Otherwise, how would a loader know the word size of
> > > the target machine?
> >
> > I think that's because in RISC-V it is always the same bit-width
> > U-Boot to load the same bit-width kernel. There is no support of
> > 32-bit U-Boot to load 64-bit kernel and vice versa.
>
> Yes, understood, but in this case we can't be sure that it is possible
> load a FIT, e.g. if someone makes a mistake.
>
> Would it be OK to create a new "riscv64" type? This has come up in the
> universal payload discussions.
>

I think so. But I will leave this to the RISC-V maintainers to make a call.

Regards,
Bin