the default.
off: Turn ECRC off
on: Turn ECRC on.
+ realloc reallocate PCI resources if allocations done by BIOS
+ are erroneous.
+ pci_reserve= [PCI]
+ Format: [<sbdf>[+IO<size>][+MEM<size>]][,<sbdf>...]
+ Format of sbdf: [<segment>:]<bus>:<dev>.<func>
+ Specifies the least reserved io size or memory size
+ which is assigned to PCI bridge even when no child
+ pci device exists. This is useful with PCI hotplug.
+
pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power
Management.
off Disable ASPM.