DEVINFO(8)              FreeBSD System Manager's Manual             DEVINFO(8)

NAME

     devinfo - print information about system device configuration

SYNOPSIS

     devinfo [-rv]
     devinfo -p dev [-v]
     devinfo -u [-v]

DESCRIPTION

     The devinfo utility, without any arguments, shows the hierarchy of
     devices available in the system, starting from the "nexus" device.

     The following options are accepted:

     -p dev  Display the path of dev back to the root of the device tree.  dev
             can either be a device name, the absolute path of an ACPI handle
             (must begin with a "\"), or a PCI selector (either
             pcidomain:bus:slot:function or pcibus:slot:function).

             If -v is specified, each device is output on a separate line
             including the device name and additional verbose information;
             otherwise, a space-separated list of device names is output.

     -r      Causes hardware resource information (such as IRQ, I/O ports, I/O
             memory addresses) to be also listed, under each device that has
             reserved those resources.

     -u      Displays the same information as with -r but sorts by resource
             type rather than by device, allowing to review the set of system
             resources by usage and available resources.  I.e., it lists all
             the IRQ consumers together.

     -v      Display all devices in the driver tree, not just those that are
             attached or busy.  Without this flag, only those devices that
             have attached are reported.  This flag also displays verbose
             information about each device.

SEE ALSO

     systat(1), devinfo(3), devctl(8), iostat(8), pciconf(8), vmstat(8),
     devclass(9), device(9)

HISTORY

     The devinfo utility appeared in FreeBSD 5.0.

AUTHORS

     Mike Smith <msmith@FreeBSD.org>

FreeBSD 15.1-STABLE-HBSD         March 6, 2026                      DEVINFO(8)