Documentation/devicetree/bindings/powerpc/ibm,vas.txt

   1 * IBM Powerpc Virtual Accelerator Switchboard (VAS)
   2
   3 VAS is a hardware mechanism that allows kernel subsystems and user processes
   4 to directly submit compression and other requests to Nest accelerators (NX)
   5 or other coprocessors functions.
   6
   7 Required properties:
   8 - compatible : should be "ibm,vas".
   9 - ibm,vas-id : A unique identifier for each instance of VAS in the system
  10 - reg : Should contain 4 pairs of 64-bit fields specifying the Hypervisor
  11   window context start and length, OS/User window context start and length,
  12   "Paste address" start and length, "Paste window id" start bit and number
  13   of bits)
  14
  15 Example:
  16
  17         vas@6019100000000 {
  18                 compatible = "ibm,vas", "ibm,power9-vas";
  19                 reg = <0x6019100000000 0x2000000 0x6019000000000 0x100000000 0x8000000000000 0x100000000 0x20 0x10>;
  20                 name = "vas";
  21                 ibm,vas-id = <0x1>;
  22         };