[PATCH v2 1/5] cyclic: Add a symbol for SPL

[Simon Glass]

Hi Tom,

On Sat, 9 Dec 2023 at 08:48, Tom Rini <trini at konsulko.com> wrote:
>
> On Sat, Dec 02, 2023 at 08:33:48AM -0700, Simon Glass wrote:
>
> > The cyclic subsystem is currently enabled either in all build phases
> > or none. For tools this should not be enabled, but since lib/shc256.c
> > and other files include watchdog.h in the host build, we must make
> > sure that it is not enabled there.
>
> This part is what I see as the Wrong Direction. There's some code we
> really need to share with our user space tools, in order to not
> copy/paste the same code. In turn, this code must be as user-space
> friendly as possible. Maybe even we re-factor things a little more, if
> needed, so that we _just_ have the library functions in common files,
> and u-boot or user space only files have the make use of logic. I don't
> feel bad about tools/ needing:
> void sha256_csum_wd(const unsigned char *input, unsigned int ilen,
>                 unsigned char *output, unsigned int chunk_sz)
> {
>         sha256_context ctx;
>         sha256_starts(&ctx);
>         sha256_update(&ctx, input, ilen);
>         sha256_finish(&ctx, output);
> }
>
> (and so on for other algos) as a duplicate bit of code. Much less so
> than I do about adding <linux/kconfig.h> to a direct include list (since
> we should never be doing that) so that later on we can if
> (IS_ENABLED(..)) the existing code.

Bear in mind that we have the CONFIG_TOOLS_... options entirely to
deal with the need for tools to enable features in common code. This
SHA thing is a very small part of the code, compared to common code in
boot/ for example.

So is this really a win?

Regards,
Simon