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lspci(8) The PCI Utilities lspci(8)
NAME
lspci - list all PCI devices
SYNOPSIS
lspci [options]
DESCRIPTION
lspci is a utility for displaying information about PCI buses in the system and devices connected to them.
By default, it shows a brief list of devices. Use the options described below to request either a more verbose output or
output intended for parsing by other programs.
If you are going to report bugs in PCI device drivers or in lspci itself, please include output of "lspci -vvx" or even
better "lspci -vvxxx" (however, see below for possible caveats).
Some parts of the output, especially in the highly verbose modes, are probably intelligible only to experienced PCI hack-
ers. For exact definitions of the fields, please consult either the PCI specifications or the header.h and
/usr/include/linux/pci.h include files.
Access to some parts of the PCI configuration space is restricted to root on many operating systems, so the features of
lspci available to normal users are limited. However, lspci tries its best to display as much as available and mark all
other information with <access denied> text.
OPTIONS
Basic display modes
-m Dump PCI device data in a backward-compatible machine readable form. See below for details.
-mm Dump PCI device data in a machine readable form for easy parsing by scripts. See below for details.
-t Show a tree-like diagram containing all buses, bridges, devices and connections between them.
Display options
-v Be verbose and display detailed information about all devices.
-vv Be very verbose and display more details. This level includes everything deemed useful.
-vvv Be even more verbose and display everything we are able to parse, even if it doesn't look interesting at all
(e.g., undefined memory regions).
-k Show kernel drivers handling each device and also kernel modules capable of handling it. Turned on by default
when -v is given in the normal mode of output. (Currently works only on Linux with kernel 2.6 or newer.)
-x Show hexadecimal dump of the standard part of the configuration space (the first 64 bytes or 128 bytes for CardBus
bridges).
-xxx Show hexadecimal dump of the whole PCI configuration space. It is available only to root as several PCI devices
crash when you try to read some parts of the config space (this behavior probably doesn't violate the PCI stan-
dard, but it's at least very stupid). However, such devices are rare, so you needn't worry much.
-xxxx Show hexadecimal dump of the extended (4096-byte) PCI configuration space available on PCI-X 2.0 and PCI Express
buses.
-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.
-D Always show PCI domain numbers. By default, lspci suppresses them on machines which have only domain 0.
Options to control resolving ID's to names
-n Show PCI vendor and device codes as numbers instead of looking them up in the PCI ID list.
-nn Show PCI vendor and device codes as both numbers and names.
-q Use DNS to query the central PCI ID database if a device is not found in the local pci.ids file. If the DNS query
succeeds, the result is cached in ~/.pciids-cache and it is recognized in subsequent runs even if -q is not given
any more. Please use this switch inside automated scripts only with caution to avoid overloading the database
servers.
-qq Same as -q, but the local cache is reset.
-Q Query the central database even for entries which are recognized locally. Use this if you suspect that the dis-
played entry is wrong.
Options for selection of devices
-s [[[[<domain>]:]<bus>]:][<slot>][.[<func>]]
Show only devices in the specified domain (in case your machine has several host bridges, they can either share a
common bus number space or each of them can address a PCI domain of its own; domains are numbered from 0 to ffff),
bus (0 to ff), slot (0 to 1f) and function (0 to 7). Each component of the device address can be omitted or set
to "*", both meaning "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 ".4" shows only
the fourth function of each device.
-d [<vendor>]:[<device>]
Show only devices with specified vendor and device ID. Both ID's are given in hexadecimal and may be omitted or
given as "*", both meaning "any value".
Other options
-i <file>
Use <file> as the PCI ID list instead of /usr/share/hwdata/pci.ids.
-p <file>
Use <file> as the map of PCI ID's handled by kernel modules. By default, lspci uses /lib/modules/kernel_ver-
sion/modules.pcimap. Applies only to Linux systems with recent enough module tools.
-M Invoke bus mapping mode which performs a thorough scan of all PCI devices, including those behind misconfigured
bridges, etc. This option gives meaningful results only with a direct hardware access mode, which usually requires
root privileges. Please note that the bus mapper only scans PCI domain 0.
--version
Shows lspci version. This option should be used stand-alone.
PCI access options
The PCI utilities use the PCI library to talk to PCI devices (see pcilib(7) for details). You can use the following
options to influence its behavior:
-A <method>
The library supports a variety of methods to access the PCI hardware. By default, it uses the first access method
available, but you can use this option to override this decision. See -A help for a list of available methods and
their descriptions.
-O <param>=<value>
The behavior of the library is controlled by several named parameters. This option allows to set the value of any
of the parameters. Use -O help for a list of known parameters and their default values.
-H1 Use direct hardware access via Intel configuration mechanism 1. (This is a shorthand for -A intel-conf1.)
-H2 Use direct hardware access via Intel configuration mechanism 2. (This is a shorthand for -A intel-conf2.)
-F <file>
Instead of accessing real hardware, read the list of devices and values of their configuration registers from the
given file produced by an earlier run 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.
-G Increase debug level of the library.
MACHINE READABLE OUTPUT
If you intend to process the output of lspci automatically, please use one of the machine-readable output formats (-m,
-vm, -vmm) described in this section. All other formats are likely to change between versions of lspci.
All numbers are always printed in hexadecimal. If you want to process numeric ID's instead of names, please add the -n
switch.
Simple format (-m)
In the simple format, each device is described on a single line, which is formatted as parameters suitable for passing to
a shell script, i.e., values separated by whitespaces, quoted and escaped if necessary. Some of the arguments are posi-
tional: slot, class, vendor name, device name, subsystem vendor name and subsystem name (the last two are empty if the
device has no subsystem); the remaining arguments are option-like:
-rrev Revision number.
-pprogif
Programming interface.
The relative order of positional arguments and options is undefined. New options can be added in future versions, but
they will always have a single argument not separated from the option by any spaces, so they can be easily ignored if not
recognized.
Verbose format (-vmm)
The verbose output is a sequence of records separated by blank lines. Each record describes a single device by a
sequence of lines, each line containing a single `tag: value' pair. The tag and the value are separated by a single tab
character. Neither the records nor the lines within a record are in any particular order. Tags are case-sensitive.
The following tags are defined:
Slot The name of the slot where the device resides ([domain:]bus:device.function). This tag is always the first in a
record.
Class Name of the class.
Vendor Name of the vendor.
Device Name of the device.
SVendor
Name of the subsystem vendor (optional).
SDevice
Name of the subsystem (optional).
PhySlot
The physical slot where the device resides (optional, Linux only).
Rev Revision number (optional).
ProgIf Programming interface (optional).
Driver Kernel driver currently handling the device (optional, Linux only).
Module Kernel module reporting that it is capable of handling the device (optional, Linux only).
New tags can be added in future versions, so you should silently ignore any tags you don't recognize.
Backward-compatible verbose format (-vm)
In this mode, lspci tries to be perfectly compatible with its old versions. It's almost the same as the regular verbose
format, but the Device tag is used for both the slot and the device name, so it occurs twice in a single record. Please
avoid using this format in any new code.
FILES
/usr/share/hwdata/pci.ids
A list of all known PCI ID's (vendors, devices, classes and subclasses). Maintained at http://pciids.source-
forge.net/, use the update-pciids utility to download the most recent version.
/usr/share/hwdata/pci.ids.gz
If lspci is compiled with support for compression, this file is tried before pci.ids.
~/.pciids-cache
All ID's found in the DNS query mode are cached in this file.
BUGS
Sometimes, lspci is not able to decode the configuration registers completely. This usually happens when not enough doc-
umentation was available to the authors. In such cases, it at least prints the <?> mark to signal that there is poten-
tially something more to say. If you know the details, patches will be of course welcome.
Access to the extended configuration space is currently supported only by the linux_sysfs back-end.
SEE ALSO
setpci(8), update-pciids(8), pcilib(7)
AUTHOR
The PCI Utilities are maintained by Martin Mares <mjATucw.cz>.
pciutils-3.1.7 31 January 2010 lspci(8)
