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CCP(4) Device Drivers Manual CCP(4)

AMD cryptographic co-processor

ccp* at acpi?
ccp* at fdt?
ccp* at pci?

AMD cryptographic co-processor devices provide offload for various cryptographic algorithms, offload of zlib compression and decompression, and a random number generator.

The ccp driver supports feeding output of the random number generator into the kernel entropy pool.

intro(4), random(4), arc4random(9)

The ccp driver first appeared in OpenBSD 6.4.

The ccp driver was written by David Gwynne <>.
April 23, 2019 OpenBSD-current