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authorKent Yoder <key@linux.vnet.ibm.com>2012-04-12 07:38:54 +0200
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-05-16 07:05:45 +0200
commit175e0e23466185a861339796efc5b51958a48dc1 (patch)
tree115b35adac8ce6c04388f5fb634c43fd2eb1b3a0 /Documentation/ABI/testing
parentpowerpc/crypto: SHA512 hash routines for nx encryption (diff)
downloadlinux-175e0e23466185a861339796efc5b51958a48dc1.tar.xz
linux-175e0e23466185a861339796efc5b51958a48dc1.zip
powerpc/crypto: debugfs routines and docs for the nx device driver
These routines add debugfs files supporting the Power7+ in-Nest encryption accelerator driver. Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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+What: /sys/kernel/debug/nx-crypto/*
+Date: March 2012
+KernelVersion: 3.4
+Contact: Kent Yoder <key@linux.vnet.ibm.com>
+Description:
+
+ These debugfs interfaces are built by the nx-crypto driver, built in
+arch/powerpc/crypto/nx.
+
+Error Detection
+===============
+
+errors:
+- A u32 providing a total count of errors since the driver was loaded. The
+only errors counted here are those returned from the hcall, H_COP_OP.
+
+last_error:
+- The most recent non-zero return code from the H_COP_OP hcall. -EBUSY is not
+recorded here (the hcall will retry until -EBUSY goes away).
+
+last_error_pid:
+- The process ID of the process who received the most recent error from the
+hcall.
+
+Device Use
+==========
+
+aes_bytes:
+- The total number of bytes encrypted using AES in any of the driver's
+supported modes.
+
+aes_ops:
+- The total number of AES operations submitted to the hardware.
+
+sha256_bytes:
+- The total number of bytes hashed by the hardware using SHA-256.
+
+sha256_ops:
+- The total number of SHA-256 operations submitted to the hardware.
+
+sha512_bytes:
+- The total number of bytes hashed by the hardware using SHA-512.
+
+sha512_ops:
+- The total number of SHA-512 operations submitted to the hardware.