1What:		/sys/kernel/debug/nx-crypto/*
2Date:		March 2012
3KernelVersion:	3.4
4Contact:	Kent Yoder <key@linux.vnet.ibm.com>
5Description:
6
7These debugfs interfaces are built by the nx-crypto driver, built in
8arch/powerpc/crypto/nx.
9
10Error Detection
11===============
12
13errors:
14  A u32 providing a total count of errors since the driver was loaded. The
15  only errors counted here are those returned from the hcall, H_COP_OP.
16
17last_error:
18  The most recent non-zero return code from the H_COP_OP hcall. -EBUSY is not
19  recorded here (the hcall will retry until -EBUSY goes away).
20
21last_error_pid:
22  The process ID of the process who received the most recent error from the
23  hcall.
24
25Device Use
26==========
27
28aes_bytes:
29  The total number of bytes encrypted using AES in any of the driver's
30  supported modes.
31
32aes_ops:
33  The total number of AES operations submitted to the hardware.
34
35sha256_bytes:
36  The total number of bytes hashed by the hardware using SHA-256.
37
38sha256_ops:
39  The total number of SHA-256 operations submitted to the hardware.
40
41sha512_bytes:
42  The total number of bytes hashed by the hardware using SHA-512.
43
44sha512_ops:
45  The total number of SHA-512 operations submitted to the hardware.
46