tree 1e3a937a067149e5cee62dcc0846011f8d4b93b4
parent dd909ab596887942492a762f58c5577ff170466f
author Marc Zyngier <marc.zyngier@arm.com> 1554823344 +0100
committer Marc Zyngier <maz@kernel.org> 1572190645 +0000

arm64: Avoid Cavium TX2 erratum 219 when switching TTBR

Commit 9405447ef79bc93101373e130f72e9e6cbf17dbb upstream.

As a PRFM instruction racing against a TTBR update can have undesirable
effects on TX2, NOP-out such PRFM on cores that are affected by
the TX2-219 erratum.

Cc: <stable@vger.kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>