tree 521cf8f4f8c9a4be624c22ffac10cc0e85ebd445
parent 306bd40939dfee091186d28e1668607bc144decb
author Arthur Heymans <arthur@aheymans.xyz> 1637166348 +0100
committer David Hendricks <david.hendricks@gmail.com> 1675642966 +0000

device/pci_device.c: Add way to limit max bus numbers

By default this limits PCI buses to CONFIG_MMCONF_BUS_NUMBER.
Some platforms have multiple PCI root busses (e.g. xeon_sp), where bus
numbers are limited. This provides a basic check. On some platforms it
looks like programming 0xff to the subordinate bus number confuses and
hangs the hardware.

Change-Id: I0582b156df1a5f76119a3687886c4d58f2d3ad6f
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59395
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>