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lspci(8) The PCI Utilities lspci(8)
lspci - list all PCI devices
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 hackers. For exact defi-
nitions 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>
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.
-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., unde-
fined 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 proba-
bly doesn't violate the PCI standard, but it's at least very
stupid). However, such devices are rare, so you needn't worry
-xxxx Show hexadecimal dump of the extended (4096-byte) PCI configura-
tion 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 sub-
sequent runs even if -q is not given any more. Please use this
switch inside automated scripts only with caution to avoid over-
loading 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 displayed entry is
Options for selection of devices
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.
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".
Use <file> as the PCI ID list instead of
Use <file> as the map of PCI ID's handled by kernel modules. By
default, lspci uses /lib/modules/kernel_version/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.
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
The library supports a variety of methods to access the PCI
hardware. By default, it uses the first access method avail-
able, but you can use this option to override this decision. See
-A help for a list of available methods and their descriptions.
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
-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.)
Instead of accessing real hardware, read the list of devices and
values of their configuration registers from the given file pro-
duced 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 disturb-
ing 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
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 positional: 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-
-rrev Revision number.
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 sepa-
rated 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
Class Name of the class.
Vendor Name of the vendor.
Device Name of the device.
Name of the subsystem vendor (optional).
Name of the subsystem (optional).
The physical slot where the device resides (optional, Linux
Rev Revision number (optional).
ProgIf Programming interface (optional).
Driver Kernel driver currently handling the device (optional, Linux
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 ver-
sions. 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
A list of all known PCI ID's (vendors, devices, classes and sub-
classes). Maintained at http://pciids.sourceforge.net/, use the
update-pciids utility to download the most recent version.
Modified by Red Hat, so that lspci also takes all
/usr/share/hwdata/pci.ids.d/*.ids files into account.
If lspci is compiled with support for compression, this file is
tried before pci.ids.
All ID's found in the DNS query mode are cached in this file.
Sometimes, lspci is not able to decode the configuration registers com-
pletely. This usually happens when not enough documentation was avail-
able to the authors. In such cases, it at least prints the <?> mark to
signal that there is potentially 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.
setpci(8), update-pciids(8), pcilib(7)
The PCI Utilities are maintained by Martin Mares <email@example.com>.
pciutils-3.1.7 31 January 2010 lspci(8)
© 1994 Man-cgi 1.15, Panagiotis Christias <firstname.lastname@example.org>