kernel-packages team mailing list archive

[James Yang <james.yang@xxxxxxx>]

Installed kernel and ran perf top -z while filtered on symbols
containing "crc32".  I see the symbol crc32c_arm64_le_hw instead of
__crc32_le on hardware with CRC32 instruction support, so the change to
the kernel is working.  Thank you.

** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial

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https://bugs.launchpad.net/bugs/1594455

Title:
  enable CRC32 and AES ARM64 by default or as module

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  The following kernel config options are disabled in linux-
  image-4.4.0-25-generic_4.4.0-25.44_arm64.deb and earlier. I ask that
  these config options to be turned on or set to use as module so that a
  kernel running on hardware that supports the instructions will use
  them.  These modules use module_cpu_feature_match() so it should fall
  back to using the generic versions when run on hardware that does not
  have the instructions.

  CRYPTO_CRC32_ARM64
  CRYPTO_AES_ARM64_CE
  CRYPTO_AES_ARM64_CE_CCM
  CRYPTO_AES_ARM64_CE_BLK

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