1lspci(8) The PCI Utilities lspci(8)
2
6 lspci - list all PCI devices
7
9 lspci [options]
10
12 lspci is a utility for displaying information about PCI buses in the
13 system and devices connected to them.
14 By default, it shows a brief list of devices. Use the options described
16 below to request either a more verbose output or output intended for
17 parsing by other programs.
18 If you are going to report bugs in PCI device drivers or in lspci
20 itself, please include output of "lspci -vvx" or even better "lspci
21 -vvxxx" (however, see below for possible caveats).
22 Some parts of the output, especially in the highly verbose modes, are
24 probably intelligible only to experienced PCI hackers. For exact defi‐
25 nitions of the fields, please consult either the PCI specifications or
26 the header.h and /usr/include/linux/pci.h include files.
27 Access to some parts of the PCI configuration space is restricted to
29 root on many operating systems, so the features of lspci available to
30 normal users are limited. However, lspci tries its best to display as
31 much as available and mark all other information with <access denied>
32 text.
33
36 Basic display modes
37 -m Dump PCI device data in a backward-compatible machine readable
38 form. See below for details.
39 -mm Dump PCI device data in a machine readable form for easy parsing
41 by scripts. See below for details.
42 -t Show a tree-like diagram containing all buses, bridges, devices
44 and connections between them.
45 Display options
48 -v Be verbose and display detailed information about all devices.
49 -vv Be very verbose and display more details. This level includes
51 everything deemed useful.
52 -vvv Be even more verbose and display everything we are able to
54 parse, even if it doesn't look interesting at all (e.g., unde‐
55 fined memory regions).
56 -k Show kernel drivers handling each device and also kernel modules
58 capable of handling it. Turned on by default when -v is given
59 in the normal mode of output. (Currently works only on Linux
60 with kernel 2.6 or newer.)
61 -x Show hexadecimal dump of the standard part of the configuration
63 space (the first 64 bytes or 128 bytes for CardBus bridges).
64 -xxx Show hexadecimal dump of the whole PCI configuration space. It
66 is available only to root as several PCI devices crash when you
67 try to read some parts of the config space (this behavior proba‐
68 bly doesn't violate the PCI standard, but it's at least very
69 stupid). However, such devices are rare, so you needn't worry
70 much.
71 -xxxx Show hexadecimal dump of the extended (4096-byte) PCI configura‐
73 tion space available on PCI-X 2.0 and PCI Express buses.
74 -b Bus-centric view. Show all IRQ numbers and addresses as seen by
76 the cards on the PCI bus instead of as seen by the kernel.
77 -D Always show PCI domain numbers. By default, lspci suppresses
79 them on machines which have only domain 0.
80 -P Identify PCI devices by path through each bridge, instead of by
82 bus number.
83 -PP Identify PCI devices by path through each bridge, showing the
85 bus number as well as the device number.
86 Options to control resolving ID's to names
89 -n Show PCI vendor and device codes as numbers instead of looking
90 them up in the PCI ID list.
91 -nn Show PCI vendor and device codes as both numbers and names.
93 -q Use DNS to query the central PCI ID database if a device is not
95 found in the local pci.ids file. If the DNS query succeeds, the
96 result is cached in ~/.pciids-cache and it is recognized in sub‐
97 sequent runs even if -q is not given any more. Please use this
98 switch inside automated scripts only with caution to avoid over‐
99 loading the database servers.
100 -qq Same as -q, but the local cache is reset.
102 -Q Query the central database even for entries which are recognized
104 locally. Use this if you suspect that the displayed entry is
105 wrong.
106 Options for selection of devices
109 -s [[[[<domain>]:]<bus>]:][<device>][.[<func>]]
110 Show only devices in the specified domain (in case your machine
111 has several host bridges, they can either share a common bus
112 number space or each of them can address a PCI domain of its
113 own; domains are numbered from 0 to ffff), bus (0 to ff), device
114 (0 to 1f) and function (0 to 7). Each component of the device
115 address can be omitted or set to "*", both meaning "any value".
116 All numbers are hexadecimal. E.g., "0:" means all devices on
117 bus 0, "0" means all functions of device 0 on any bus, "0.3"
118 selects third function of device 0 on all buses and ".4" shows
119 only the fourth function of each device.
120 -d [<vendor>]:[<device>][:<class>]
122 Show only devices with specified vendor, device and class ID.
123 The ID's are given in hexadecimal and may be omitted or given as
124 "*", both meaning "any value".
125 Other options
128 -i <file>
129 Use <file> as the PCI ID list instead of
130 /usr/share/hwdata/pci.ids.
131 -p <file>
133 Use <file> as the map of PCI ID's handled by kernel modules. By
134 default, lspci uses /lib/modules/kernel_version/modules.pcimap.
135 Applies only to Linux systems with recent enough module tools.
136 -M Invoke bus mapping mode which performs a thorough scan of all
138 PCI devices, including those behind misconfigured bridges, etc.
139 This option gives meaningful results only with a direct hardware
140 access mode, which usually requires root privileges. Please
141 note that the bus mapper only scans PCI domain 0.
142 --version
144 Shows lspci version. This option should be used stand-alone.
145 PCI access options
148 The PCI utilities use the PCI library to talk to PCI devices (see
149 pcilib(7) for details). You can use the following options to influence
150 its behavior:
151 -A <method>
153 The library supports a variety of methods to access the PCI
154 hardware. By default, it uses the first access method avail‐
155 able, but you can use this option to override this decision. See
156 -A help for a list of available methods and their descriptions.
157 -O <param>=<value>
159 The behavior of the library is controlled by several named
160 parameters. This option allows to set the value of any of the
161 parameters. Use -O help for a list of known parameters and their
162 default values.
163 -H1 Use direct hardware access via Intel configuration mechanism 1.
165 (This is a shorthand for -A intel-conf1.)
166 -H2 Use direct hardware access via Intel configuration mechanism 2.
168 (This is a shorthand for -A intel-conf2.)
169 -F <file>
171 Instead of accessing real hardware, read the list of devices and
172 values of their configuration registers from the given file pro‐
173 duced by an earlier run of lspci -x. This is very useful for
174 analysis of user-supplied bug reports, because you can display
175 the hardware configuration in any way you want without disturb‐
176 ing the user with requests for more dumps.
177 -G Increase debug level of the library.
179
182 If you intend to process the output of lspci automatically, please use
183 one of the machine-readable output formats (-m, -vm, -vmm) described in
184 this section. All other formats are likely to change between versions
185 of lspci.
186 All numbers are always printed in hexadecimal. If you want to process
189 numeric ID's instead of names, please add the -n switch.
190 Simple format (-m)
193 In the simple format, each device is described on a single line, which
194 is formatted as parameters suitable for passing to a shell script,
195 i.e., values separated by whitespaces, quoted and escaped if necessary.
196 Some of the arguments are positional: slot, class, vendor name, device
197 name, subsystem vendor name and subsystem name (the last two are empty
198 if the device has no subsystem); the remaining arguments are option-
199 like:
200 -rrev Revision number.
203 -pprogif
206 Programming interface.
207 The relative order of positional arguments and options is undefined.
210 New options can be added in future versions, but they will always have
211 a single argument not separated from the option by any spaces, so they
212 can be easily ignored if not recognized.
213 Verbose format (-vmm)
216 The verbose output is a sequence of records separated by blank lines.
217 Each record describes a single device by a sequence of lines, each line
218 containing a single `tag: value' pair. The tag and the value are sepa‐
219 rated by a single tab character. Neither the records nor the lines
220 within a record are in any particular order. Tags are case-sensitive.
221 The following tags are defined:
224 Slot The name of the slot where the device resides
227 ([domain:]bus:device.function). This tag is always the first in
228 a record.
229 Class Name of the class.
232 Vendor Name of the vendor.
235 Device Name of the device.
238 SVendor
241 Name of the subsystem vendor (optional).
242 SDevice
245 Name of the subsystem (optional).
246 PhySlot
249 The physical slot where the device resides (optional, Linux
250 only).
251 Rev Revision number (optional).
254 ProgIf Programming interface (optional).
257 Driver Kernel driver currently handling the device (optional, Linux
260 only).
261 Module Kernel module reporting that it is capable of handling the
264 device (optional, Linux only). Multiple lines with this tag can
265 occur.
266 NUMANode
269 NUMA node this device is connected to (optional, Linux only).
270 IOMMUGroup
273 IOMMU group that this device is part of (optional, Linux only).
274 New tags can be added in future versions, so you should silently ignore
277 any tags you don't recognize.
278 Backward-compatible verbose format (-vm)
281 In this mode, lspci tries to be perfectly compatible with its old ver‐
282 sions. It's almost the same as the regular verbose format, but the
283 Device tag is used for both the slot and the device name, so it occurs
284 twice in a single record. Please avoid using this format in any new
285 code.
286
289 /usr/share/hwdata/pci.ids
290 A list of all known PCI ID's (vendors, devices, classes and sub‐
291 classes). Maintained at https://pci-ids.ucw.cz/, use the update-
292 pciids utility to download the most recent version.
293 /usr/share/hwdata/pci.ids.gz
295 If lspci is compiled with support for compression, this file is
296 tried before pci.ids.
297 ~/.pciids-cache
299 All ID's found in the DNS query mode are cached in this file.
300
303 Sometimes, lspci is not able to decode the configuration registers com‐
304 pletely. This usually happens when not enough documentation was avail‐
305 able to the authors. In such cases, it at least prints the <?> mark to
306 signal that there is potentially something more to say. If you know the
307 details, patches will be of course welcome.
308 Access to the extended configuration space is currently supported only
310 by the linux_sysfs back-end.
311
314 setpci(8), pci.ids(5), update-pciids(8), pcilib(7)
315
318 The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.
319pciutils-3.7.0 31 May 2020 lspci(8)