[PATCH v2 0/3] Add Zhaoxin hardware engine driver support for SHA

[Tony W Wang-oc]

Zhaoxin CPUs have implemented the SHA(Secure Hash Algorithm) as its CPU
instructions, including SHA1, SHA256, SHA384 and SHA512, which conform
to the Secure Hash Algorithms specified by FIPS 180-3.

With the help of implementation of SHA in hardware instead of software,
can develop applications with higher performance, more security and more
flexibility.

Below table gives a summary of test using the driver tcrypt with different
crypt algorithm drivers on Zhaoxin KH-40000 platform:
---------------------------------------------------------------------------
tcrypt     driver   16*    64      256     1024    2048    4096    8192
---------------------------------------------------------------------------
           zhaoxin** 442.80 1309.21 3257.53 5221.56 5813.45 6136.39 6264.50***
403:SHA1   generic** 341.44 813.27  1458.98 1818.03 1896.60 1940.71 1939.06
           ratio    1.30   1.61    2.23    2.87    3.07    3.16    3.23
---------------------------------------------------------------------------
           zhaoxin  451.70 1313.65 2958.71 4658.55 5109.16 5359.08 5459.13
404:SHA256 generic  202.62 463.55  845.01  1070.50 1117.51 1144.79 1155.68
           ratio    2.23   2.83    3.50    4.35    4.57    4.68    4.72
---------------------------------------------------------------------------
           zhaoxin  350.90 1406.42 3166.16 5736.39 6627.77 7182.01 7429.18
405:SHA384 generic  161.76 654.88  979.06  1350.56 1423.08 1496.57 1513.12
           ratio    2.17   2.15    3.23    4.25    4.66    4.80    4.91
---------------------------------------------------------------------------
           zhaoxin  334.49 1394.71 3159.93 5728.86 6625.33 7169.23 7407.80
406:SHA512 generic  161.80 653.84  979.42  1351.41 1444.14 1495.35 1518.43
           ratio    2.07   2.13    3.23    4.24    4.59    4.79    4.88
---------------------------------------------------------------------------
*: The length of each data block to be processed by one complete SHA
   sequence, namely one INIT, multi UPDATEs and one FINAL.
**: Crypt algorithm driver used by tcrypt, "zhaoxin" represents zhaoxin-sha
   while "generic" represents the generic software SHA driver.
***: The speed of each crypt algorithm driver processing different length
   of data blocks, unit is Mb/s.

The ratio in the table implies the performance of SHA implemented by
zhaoxin-sha driver is much higher than the ones implemented by the generic
software driver of sha1/sha256/sha384/sha512.

In order to support Zhaoxin-sha driver, make padlock-sha driver matches
the CENTAUR CPUs with Family == 6 and add two Zhaoxin Hash Engine
cpufeatures.

---
v2:
- Make Zhaoxin SHA depends on X86 && !UML
- Update MAINTAINERS for Zhaoxin SHA

Tony W Wang-oc (3):
  crypto: padlock-sha: Matches CPU with Family with 6 explicitly
  x86/cpufeatures: Add CPU feature flags for Zhaoxin Hash Engine
  crypto: Zhaoxin: Hardware Engine Driver for SHA1/256/384/512

 MAINTAINERS                              |   6 +
 arch/x86/include/asm/cpufeatures.h       |   4 +-
 drivers/crypto/Kconfig                   |  16 +
 drivers/crypto/Makefile                  |   1 +
 drivers/crypto/padlock-sha.c             |   2 +-
 drivers/crypto/zhaoxin-sha.c             | 500 +++++++++++++++++++++++
 drivers/crypto/zhaoxin-sha.h             |  17 +
 tools/arch/x86/include/asm/cpufeatures.h |   4 +-
 8 files changed, 547 insertions(+), 3 deletions(-)
 create mode 100644 drivers/crypto/zhaoxin-sha.c
 create mode 100644 drivers/crypto/zhaoxin-sha.h

-- 
2.25.1