[PATCH 15/34] image: Add a new type for extlinux

[Tom Rini]

On Fri, Oct 18, 2024 at 08:57:02AM -0600, Simon Glass wrote:
> Hi Tom,
> 
> On Thu, 17 Oct 2024 at 21:14, Tom Rini <trini at konsulko.com> wrote:
> >
> > On Thu, Oct 17, 2024 at 05:23:54PM -0600, Simon Glass wrote:
> >
> > > Add an image type for the extlinux.cfg file, which U-Boot supports
> > > reading.
> > >
> > > Signed-off-by: Simon Glass <sjg at chromium.org>
> > > ---
> > >
> > >  boot/image.c    | 1 +
> > >  include/image.h | 1 +
> > >  2 files changed, 2 insertions(+)
> > >
> > > diff --git a/boot/image.c b/boot/image.c
> > > index abac254e026..cf16fb7fbf7 100644
> > > --- a/boot/image.c
> > > +++ b/boot/image.c
> > > @@ -183,6 +183,7 @@ static const table_entry_t uimage_type[] = {
> > >       {       IH_TYPE_FDT_LEGACY, "fdt_legacy", "legacy Image with Flat Device Tree ", },
> > >       {       IH_TYPE_RENESAS_SPKG, "spkgimage", "Renesas SPKG Image" },
> > >       {       IH_TYPE_STARFIVE_SPL, "sfspl", "StarFive SPL Image" },
> > > +     {       IH_TYPE_EXTLINUX_CFG, "extlinux_cfg", "Extlinux configuration" },
> > >       {       -1,                 "",           "",                   },
> > >  };
> >
> > This whole part of the series feels like we're abusing IH_TYPE_ far past
> > what it's used for. Especially the command line string one. It seems
> > like the main use is to be able to later on print something human
> > friendly. Please try and figure out some other way to do that. Thanks.
> 
> Yes I had the same thought, particularly with cmdline, as you say.
> 
> The obvious alternative is to just have a string which communicates
> the type. Then I can use IH_TYPE_INVALID, perhaps, with an extra
> string indicating what it really is.
> 
> But one advantage of the approach in this patch is that, for bootmeths
> which include a cmdline, it can be identified and added as a file.
> That includes zimage and ChromiumOS, but not EFI. It will allow me to
> get rid of the cmdline in struct bootflow, perhaps.

Yeah, this all sounds like IH_TYPE is the wrong direction to expand.
Where you're grabbing these things from is where you might get a hint as
to what these things are and that's where to take the store the
knowledge for later.

-- 
Tom
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