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 };
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