Re: [Qemu-ppc] [PATCH 4/5] configs: Add a CONFIG_UNIMP switch for the "unimplemented-device"

[Peter Maydell]

On 19 October 2018 at 15:40, Thomas Huth <address@hidden> wrote:
> Anyway, it's also not only about speeding up the compilation process for
> people who don't want to use the corresponding targets, this is also
> very useful for downstream distributions of QEMU who want to make sure
> to not compile-in more devices than urgently needed. For example we
> disable this device here and the others in downstream RHEL version of
> QEMU, and I guess it might be interesting for nemu, too. So having more
> flexibility here in the Makefiles would be really great to decrease the
> burden with downstream-specific patches...

I think if we want to support this for downstreams we need
to look at something better than the default-configs/
mechanism for it. (Perhaps the kconfig-alike Paolo mentioned
in a previous thread?)

My dividing line for "should something go in a specific
architecture's default-configs/ list" is "is this an SoC
or real piece of hardware that is naturally limited to
one or a few SoCs".

thanks
-- PMM