lspci(8) — Linux manual page


lspci(8)                      The PCI Utilities                     lspci(8)

NAME         top

       lspci - list all PCI devices

SYNOPSIS         top

       lspci [options]

DESCRIPTION         top

       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
       definitions of the fields, please consult either the PCI
       specifications or the header.h and /usr/include/linux/pci.h include

       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>

OPTIONS         top

   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 standard, 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

       -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.

       -P     Identify PCI devices by path through each bridge, instead of
              by bus number.

       -PP    Identify PCI devices by path through each bridge, showing the
              bus number as well as the device number.

   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
              displayed entry is wrong.

   Options for selection of devices
       -s [[[[<domain>]:]<bus>]:][<device>][.[<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), device (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

       -d [<vendor>]:[<device>][:<class>]
              Show only devices with specified vendor, device and class ID.
              The 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

       -p <file>
              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 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.


       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 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-like:

       -rrev  Revision number.

              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-

       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.

              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). Multiple lines with this tag
              can occur.

              NUMA node this device is connected to (optional, Linux only).

              IOMMU group that this device is part of (optional, Linux

       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         top

              A list of all known PCI ID's (vendors, devices, classes and
              subclasses). Maintained at, use the
              update-pciids utility to download the most recent version.

              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.

BUGS         top

       Sometimes, lspci is not able to decode the configuration registers
       completely.  This usually happens when not enough documentation was
       available 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.

SEE ALSO         top

       setpci(8), pci.ids(5), update-pciids(8), pcilib(7)

AUTHOR         top

       The PCI Utilities are maintained by Martin Mares <>.

COLOPHON         top

       This page is part of the pciutils (PCI utilities) project.
       Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this
       manual page, send it to  This page was
       obtained from the project's upstream Git repository
       ⟨git://⟩ on
       2020-06-09.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-06-06.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

pciutils-3.6.4                 25 January 2020                      lspci(8)

Pages that refer to this page: pci.ids(5)proc(5)procfs(5)pcilib(7)lsusb(8)setpci(8)update-pciids(8)