tree f3b78e8a49fb46e1b99246cc8976c08382804215
parent 73dcf05f633b5e3a7d9a16338a64c1832ef38388
author Giacomo Travaglini <giacomo.travaglini@arm.com> 1518688520 +0000
committer Giacomo Travaglini <giacomo.travaglini@arm.com> 1519133402 +0000

arch-arm: Make hlt64 a mem barrier with semihosting

The HLT instruction is used to trap into semihosting. The semihosting
code can change the contents of memory behind the back of the CPU,
which requires instructions triggering semihosting to be
non-speculative and memory barriers.

Change-Id: I735166251aa194120ad49c08082d4ac65fe96524
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8373
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>