ceph/src/spdk/dpdk/doc/guides/cryptodevs/armv8.rst

   1 ..  SPDX-License-Identifier: BSD-3-Clause
   2     Copyright(c) 2017 Cavium, Inc
   3
   4 ARMv8 Crypto Poll Mode Driver
   5 =============================
   6
   7 This code provides the initial implementation of the ARMv8 crypto PMD.
   8 The driver uses ARMv8 cryptographic extensions to process chained crypto
   9 operations in an optimized way. The core functionality is provided by
  10 a low-level library, written in the assembly code.
  11
  12 Features
  13 --------
  14
  15 ARMv8 Crypto PMD has support for the following algorithm pairs:
  16
  17 Supported cipher algorithms:
  18
  19 * ``RTE_CRYPTO_CIPHER_AES_CBC``
  20
  21 Supported authentication algorithms:
  22
  23 * ``RTE_CRYPTO_AUTH_SHA1_HMAC``
  24 * ``RTE_CRYPTO_AUTH_SHA256_HMAC``
  25
  26 Installation
  27 ------------
  28
  29 In order to enable this virtual crypto PMD, user must:
  30
  31 * Download AArch64 crypto library source code from
  32   `here <https://github.com/ARM-software/AArch64cryptolib>`_
  33
  34 * Export the environmental variable ARMV8_CRYPTO_LIB_PATH with
  35   the path to ``AArch64cryptolib`` library.
  36
  37 * Build the library by invoking:
  38
  39 .. code-block:: console
  40
  41         make -C $ARMV8_CRYPTO_LIB_PATH/
  42
  43 * Set CONFIG_RTE_LIBRTE_PMD_ARMV8_CRYPTO=y in
  44   config/defconfig_arm64-armv8a-linux-gcc
  45
  46 The corresponding device can be created only if the following features
  47 are supported by the CPU:
  48
  49 * ``RTE_CPUFLAG_AES``
  50 * ``RTE_CPUFLAG_SHA1``
  51 * ``RTE_CPUFLAG_SHA2``
  52 * ``RTE_CPUFLAG_NEON``
  53
  54 Initialization
  55 --------------
  56
  57 User can use app/test application to check how to use this PMD and to verify
  58 crypto processing.
  59
  60 Test name is cryptodev_sw_armv8_autotest.
  61
  62 Limitations
  63 -----------
  64
  65 * Maximum number of sessions is 2048.
  66 * Only chained operations are supported.
  67 * AES-128-CBC is the only supported cipher variant.
  68 * Cipher input data has to be a multiple of 16 bytes.
  69 * Digest input data has to be a multiple of 8 bytes.