kernel-packages team mailing list archive

[Ryan Tucker <launchpad@xxxxxxxxxxxxx>]

As the original impetus for this bug report: I cannot personally verify
that this solves the original problem
(https://answers.launchpad.net/launchpad/+question/285505) as it
manifests itself on the Launchpad build farm and I do not have necessary
hardware to reproduce this independently.

Latest attempt is https://launchpadlibrarian.net/242901620
/buildlog_ubuntu-precise-
armhf.bladerf_2016.01-rc1+1SNAPSHOT20160225213708-git61c3b57~precise_BUILDING.txt.gz
... note presence of "Illegal instruction" within the log, and the
kernel version of 4.2.0-30-generic on aarch64.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1545542

Title:
  Enable arm64 emulation of removed ARMv7 instructions

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Wily:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Linux now supports emulation of three deprecated ARMv7 features that
  were removed from ARMv8: SWP(B), CP15ISB/DSB/DMB, and SETEND. At least
  CP15DMB is used by some armhf archive binaries (notably pandoc), so we
  need emulation enabled on the kernels that scalingstack uses.

  I haven't checked which version added which, but they appeared some
  time between 3.13 and 4.2, and I only care about 4.2 onwards. So
  please enable ARMV8_DEPRECATED, SWP_EMULATION, CP15_BARRIER_EMULATION
  and SETEND_EMULATION in arm64 kernels for wily onwards.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1545542/+subscriptions