The current implementation of the MCRS had several issues with BARs
and MMCONF not being available:
[ 0.156231] pci 0000:00:02.0: BAR 2: assigned to efifb
[ 0.165302] pci 0000:00:18.2: can't claim BAR 0 [mem 0xddffc000-0xddffcfff 64bit]: no compatible bridge window
[ 0.192896] pci 0000:00:18.2: BAR 0: assigned [mem 0x280000000-0x280000fff 64bit]
...
[ 0.138300] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0xe0000000-0xefffffff] (base 0xe0000000)
[ 0.138300] PCI: not using MMCONFIG
[ 0.148014] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0xe0000000-0xefffffff] (base 0xe0000000)
[ 0.149674] [Firmware Info]: PCI: MMCONFIG at [mem 0xe0000000-0xefffffff] not reserved in ACPI motherboard resources
[ 0.149679] PCI: not using MMCONFIG
[ 0.155052] acpi PNP0A08:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
This new MCRS, tested on the Star Lite Mk IV, resolves these issues:
[ 0.158786] pci 0000:00:02.0: BAR 2: assigned to efifb
[ 0.197391] pci 0000:00:1f.1: BAR 0: assigned [mem 0x280000000-0x2800000ff 64bit]
...
[ 0.138460] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem
0xe0000000-0xefffffff] (base 0xe0000000)
[ 0.138460] PCI: not using MMCONFIG
[ 0.150889] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem
0xe0000000-0xefffffff] (base 0xe0000000)
[ 0.152548] PCI: MMCONFIG at [mem 0xe0000000-0xefffffff] reserved in ACPI motherboard resources
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: Ib6fc58efc9aadb5828251e0260622dac7ea3ef2b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66244
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>