glxsb4
Geode lx security block crypto accelerator
Usage
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"
Overview
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.
Releases
Unchanged in 9 releases since FreeBSD 14.0-RELEASE.