Public bug reported:
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.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
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https://bugs.launchpad.net/bugs/1545542
Title:
Enable arm64 emulation of removed ARMv7 instructions
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