# lspci

## 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/local/share/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:
    
           **-r** _rev_  Revision number.
    
           **-p** _progif_
                  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/local/share/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/local/share/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.
    


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