tree d6297557e50a6c6c4672f78b37efa649f4439c74
parent 852e494075d92199e9bddfe92d364f2107a5a25d
author Javier Almansa Sobrino <javier.almansasobrino@arm.com> 1606156695 +0000
committer Javier Almansa Sobrino <javier.almansasobrino@arm.com> 1607690960 +0000

Add support for FEAT_MTPMU for Armv8.6

If FEAT_PMUv3 is implemented and PMEVTYPER<n>(_EL0).MT bit is implemented
as well, it is possible to control whether PMU counters take into account
events happening on other threads.

If FEAT_MTPMU is implemented, EL3 (or EL2) can override the MT bit
leaving it to effective state of 0 regardless of any write to it.

This patch introduces the DISABLE_MTPMU flag, which allows to diable
multithread event count from EL3 (or EL2). The flag is disabled
by default so the behavior is consistent with those architectures
that do not implement FEAT_MTPMU.

Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: Iee3a8470ae8ba13316af1bd40c8d4aa86e0cb85e