lspci(8) Linux PCI Utilities lspci(8)
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 conditions 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 all devices.
-vv Tells lspci to be very verbose and display even more information (actually every-
thing 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 PCI specs.
-n Show PCI vendor and device codes as numbers instead of looking them up in the PCI
-x Show hexadecimal dump of first 64 bytes of the PCI configuration space (the stan-
dard header). Useful for debugging of drivers and lspci itself.
-xxx Show hexadecimal dump of whole PCI configuration space. Available 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
Show only devices in specified bus, slot and function. Each component of the device
address can be omitted or set as "*" meaning "any value". All numbers are hexadeci-
mal. 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 ".4" shows only
fourth function of each device.
Show only devices with specified vendor and device ID. Both ID's are given in hexa-
decimal and may be omitted or given as "*" meaning "any value".
Use <file> as PCI ID database instead of /usr/share/hwdata/pci.ids.
Use <dir> as directory containing PCI bus information instead of /proc/bus/pci.
-m Dump PCI device data in machine readable form (both normal and verbose format sup-
ported) for easy parsing by scripts.
-M Invoke bus mapping mode which scans the bus extensively to find all devices includ-
ing 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
unfortunately 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 con-
trol 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 compati-
-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 hard-
ware 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)
A list of all known PCI ID's (vendors, devices, classes and subclasses).
An interface to PCI bus configuration space provided by the post-2.1.82 Linux ker-
nels. Contains per-bus subdirectories with per-card config space files and a
devices file containing a list of all PCI devices.
The Linux PCI Utilities are maintained by Martin Mares <email@example.com>.
pciutils-2.1.10 30 March 2002 lspci(8)