lspci - list all PCI devices
lspci is a utility for displaying information about all PCI buses in
the system and all devices connected to them.
To make use of all the features of this program, you need to have Linux
kernel 2.1.82 or newer which supports the /proc/bus/pci interface. With
older kernels, the PCI utilities have to use direct hardware access
which is available only to root and it suffers from numerous race con-
ditions and other problems.
If you are going to report bugs in PCI device drivers or in lspci
itself, please include output of "lspci -vvx".
-v Tells lspci to be verbose and display detailed information about
-vv Tells lspci to be very verbose and display even more information
(actually everything the PCI device is able to tell). The exact
meaning of these data is not explained in this manual page, if
you want to know more, consult /usr/include/linux/pci.h or the
-n Show PCI vendor and device codes as numbers instead of looking
them up in the PCI ID database.
-x Show hexadecimal dump of first 64 bytes of the PCI configuration
space (the standard header). Useful for debugging of drivers and
-xxx Show hexadecimal dump of whole PCI configuration space. Avail-
able only for root as several PCI devices crash when you try to
read undefined portions of the config space (this behaviour
probably doesn't violate the PCI standard, but it's at least
-b Bus-centric view. Show all IRQ numbers and addresses as seen by
the cards on the PCI bus instead of as seen by the kernel.
-t Show a tree-like diagram containing all buses, bridges, devices
and connections between them.
Show only devices in specified bus, slot and function. Each com-
ponent of the device address can be omitted or set as "*" mean-
ing "any value". All numbers are hexadecimal. E.g., "0:" means
all devices on bus 0, "0" means all functions of device 0 on any
bus, "0.3" selects third function of device 0 on all buses and
Use <dir> as directory containing PCI bus information instead of
-m Dump PCI device data in machine readable form (both normal and
verbose format supported) for easy parsing by scripts.
-M Invoke bus mapping mode which scans the bus extensively to find
all devices including those behind misconfigured bridges etc.
Please note that this is intended only for debugging and as it
can crash the machine (only in case of buggy devices, but unfor-
tunately these happen to exist), it's available only to root.
Also using -M on PCI access methods which don't directly touch
the hardware has no sense since the results are (modulo bugs in
lspci) identical to normal listing modes.
Shows lspci version. This option should be used standalone.
The PCI utilities use PCILIB (a portable library providing platform-
independent functions for PCI configuration space access) to talk to
the PCI cards. The following options control parameters of the library,
especially what access method it uses. By default, PCILIB uses the
first available access method and displays no debugging messages. Each
switch is accompanied by a list of hardware/software configurations
it's supported in.
Use Linux 2.1 style configuration access to directory <dir>
instead of /proc/bus/pci. (Linux 2.1 or newer only)
-H1 Use direct hardware access via Intel configuration mechanism 1.
(i386 and compatible only)
-H2 Use direct hardware access via Intel configuration mechanism 2.
Warning: This method is able to address only first 16 devices on
any bus and it seems to be very unrealiable in many cases. (i386
and compatible only)
-S Use PCI access syscalls. (Linux on Alpha and UltraSparc only)
Extract all information from given file containing output of
lspci -x. This is very useful for analysis of user-supplied bug
reports, because you can display the hardware configuration in
any way you want without disturbing the user with requests for
more dumps. (All systems)
-G Increase debug level of the library. (All systems)
The Linux PCI Utilities are maintained by Martin Mares <firstname.lastname@example.org>.
pciutils-2.1.10 30 March 2002 lspci(8)