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 hackers. 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 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
	      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.

       -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 $XDG_CACHE_HOME/pci-ids 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 device.

       -d [<vendor>]:[<device>][:<class>[:<prog-if>]]
	      Show only devices with specified vendor, device, class ID, and
	      programming interface.  The ID's are given in hexadecimal and
	      may be omitted or given as "*", both meaning "any value". The
	      class ID can contain "x" characters which stand for "any digit".


   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_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.  By
	      default, the bus mapper scans domain. You can use the -s option
	      to select a different domain.

       --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 one 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 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.


       -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). Multiple lines with this tag can
	      occur.


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


       IOMMUGroup
	      IOMMU group that this device is part of (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 https://pci-ids.ucw.cz/, 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.

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


AUTHOR
       The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.

pciutils-3.14.0			 21 June 2025			      lspci(8)