Useful for debugging of drivers and lspci itself. Show hexadecimal dump of whole PCI configuration space. Show all IRQ numbers and addresses as seen by the cards on the PCI bus instead of as seen by the kernel. Show a tree-like diagram containing all buses, bridges, devices and connections between them. Show only devices in specified bus, slot and function.
All numbers are hexadecimal.
Invoke bus mapping mode which scans the bus extensively to find all devices including those behind misconfigured bridges etc. The following options control parameters of the library, especially what access method it uses. Use direct hardware access via Intel configuration mechanism 1. Use direct hardware access via Intel configuration mechanism 2. This method is able to address only first 16 devices on any bus and it seems to be very unrealiable in many cases.