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NAME

     glxsb - Geode LX Security Block crypto accelerator

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your
     kernel configuration file:

           device crypto
           device glxsb

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

           glxsb_load="YES"

DESCRIPTION

     The glxsb driver supports the security block of the Geode LX series
     processors.  The Geode LX is a member of the AMD Geode family of
     integrated x86 system chips.

     Driven by periodic checks for available data from the generator, glxsb
     supplies entropy to the random(4) driver for common usage.

     glxsb also supports acceleration of AES-128-CBC operations for crypto(4).
     It also registers itself to accelerate other HMAC algorithms, although
     there is no hardware acceleration for those algorithms.  This is only
     needed so glxsb can work with ipsec(4).

CAVEAT

     The crypto(9) framework will fail to open the crypto session on the
     device if the AES key’s length is != 128 bits.  This prevents the use of
     the glxsb device driver with AES keys of length != 128 bits.

SEE ALSO

     crypto(4), intro(4), pci(4), ipsec(4), random(4), crypto(9)

HISTORY

     The glxsb device driver first appeared in OpenBSD 4.1.  The glxsb device
     driver was imported into FreeBSD 8.0.

AUTHORS

     The glxsb device driver was written for OpenBSD by Tom Cosgrove.  It was
     ported to FreeBSD by Patrick Lamaiziere 〈patfbsd@davenulle.org