Change in coreboot[master]: device/Kconfig: Adapt PCIEXP_HOTPLUG_BUSES

[Nico Huber (Code Review)]

Nico Huber has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/52069 )

Change subject: device/Kconfig: Adapt PCIEXP_HOTPLUG_BUSES
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device/Kconfig: Adapt PCIEXP_HOTPLUG_BUSES

The default of 32 buses per hotplug bridge is rather high. Especially
for platforms that limit MMConf space to 64 buses: they run out of
numbers if there is more than a single hotplug bridge.

Lower the default to

*  8 if MMConf is limitted to  64 or less buses,
* 16 if MMConf is limitted to 128 or less buses.

Change-Id: I06d522dd92ceea9f4798273b26f947a5333800c3
Signed-off-by: Nico Huber 
---
M src/device/Kconfig
1 file changed, 2 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/69/52069/1

diff --git a/src/device/Kconfig b/src/device/Kconfig
index 1bfc34a..63b7d6c 100644
--- a/src/device/Kconfig
+++ b/src/device/Kconfig
@@ -626,6 +626,8 @@

config PCIEXP_HOTPLUG_BUSES
    int "PCI Express Hotplug Buses"
+	default  8 if MMCONF_SUPPORT && MMCONF_BUS_NUMBER <=  64
+	default 16 if MMCONF_SUPPORT && MMCONF_BUS_NUMBER <= 128
    default 32
    help
      This is the number of buses allocated for hotplug PCI express