The undionly.kpxe binary does not need the full PCI bus support.
However, the overwhelming majority of UNDI devices are PCI-based and
we already end up dragging in PCI configuration space support in order
to be able to test for devices with broken interrupts.
Dragging in the PCI configuration allows the PCI settings mechanism to
also be present, which is often useful for end users. The total cost
is around 200 bytes in the final binary, which is acceptable for a
generally very useful feature.
Users wanting to minimise the binary size can choose to explicitly
disable PCI_SETTINGS via config/settings.h.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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