When in doubt, say N.
source "drivers/pci/pcie/aer/Kconfig"
+
+#
+# PCI Express ASPM
+#
+config PCIEASPM
+ bool "PCI Express ASPM support(Experimental)"
+ depends on PCI && EXPERIMENTAL && PCIEPORTBUS
+ default n
+ help
+ This enables PCI Express ASPM (Active State Power Management) and
+ Clock Power Management. ASPM supports state L0/L0s/L1.
+
+ When in doubt, say N.
+config PCIEASPM_DEBUG
+ bool "Debug PCI Express ASPM"
+ depends on PCIEASPM
+ default n
+ help
+ This enables PCI Express ASPM debug support. It will add per-device
+ interface to control ASPM.