Provided by: pciutils_3.0.0-4ubuntu8_i386
setpci - configure PCI devices
setpci [options] devices operations...
setpci is a utility for querying and configuring PCI devices.
All numbers are entered in hexadecimal notation.
Root privileges are necessary for almost all operations, excluding
reads of the standard header of the configuration space on some
operating systems. Please see lspci(8) for details on access rights.
-v Tells setpci to be verbose and display detailed information
about configuration space accesses.
-f Tells setpci not to complain when there’s nothing to do (when no
devices are selected). This option is intended for use in
widely-distributed configuration scripts where it’s uncertain
whether the device in question is present in the machine or not.
-D ‘Demo mode’ -- don’t write anything to the configuration
registers. It’s useful to try setpci -vD to see what your
complex sequence of setpci operations does before you actually
Shows setpci 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
available, but you can use this option to override this
decision. See -A help for a list of available methods and their
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.)
-G Increase debug level of the library.
Before each sequence of operations you need to select which devices you
wish that operation to affect.
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.
Select 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".
To query value of a configuration register, just name it (either by
typing its name or by typing register address with optional .B, .W or
.L suffix specifying register width as byte, word or longword).
To set a register, write reg=values where reg is the same as you would
use to query the register and values is a comma-separated list of
values you want to write starting with the given address. Each value to
be written can be specified either as a hexadecimal number or as a
bits:mask pair which causes the bits corresponding to binary ones in
the mask to be changed to values of the corresponding bits in the bits
setpci knows the following configuration register names. See PCI bus
specifications for their precise meaning or consult header.h or
/usr/include/linux/pci.h for a couple of comments.
The PCI Utilities are maintained by Martin Mares <email@example.com>.