K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2019-10-30T15:30:40.171818Z
K 7
svn:log
V 482
ARM64: Treat alignment faults as bus errors

Summary:
ARM64 currently treats all data abort exceptions as page faults.  This
can cause infinite loops on non-page fault faults, such as alignment faults.

Since kernel-side alignment faults should be avoided, this adds support directly
to the el0 fault handler, instead of the data_abort() handler.

Test Plan: Tested on rpi3, with a misaligned ldm test.

Reviewed by:	andrew
Differential Revision:	https://reviews.freebsd.org/D22133

END