** Changed in: linux (Ubuntu)
Assignee: Tim Gardner (timg-tpi) => (unassigned)
** Also affects: linux (Ubuntu Artful)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: Confirmed
** Also affects: linux (Ubuntu Zesty)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1545542
Title:
Enable arm64 emulation of removed ARMv7 instructions
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Wily:
Fix Released
Status in linux source package in Xenial:
Fix Released
Status in linux source package in Zesty:
New
Status in linux source package in Artful:
New
Status in linux source package in Bionic:
Confirmed
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:
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