tree fd4013c80cb98e6a0ff2160d6d645cc534f23654
parent 69074130533995d44ba9e44a8b27cf00f2f6186b
author Jeenu Viswambharan <jeenu.viswambharan@arm.com> 1533050013 +0100
committer Jeenu Viswambharan <jeenu.viswambharan@arm.com> 1534746739 +0100

AArch64: Enable MPAM for lower ELs

Memory Partitioning And Monitoring is an Armv8.4 feature that enables
various memory system components and resources to define partitions.
Software running at various ELs can then assign themselves to the
desired partition to control their performance aspects.

With this patch, when ENABLE_MPAM_FOR_LOWER_ELS is set to 1, EL3 allows
lower ELs to access their own MPAM registers without trapping to EL3.
This patch however doesn't make use of partitioning in EL3; platform
initialisation code should configure and use partitions in EL3 if
required.

Change-Id: I5a55b6771ccaa0c1cffc05543d2116b60cbbcdcd
Co-authored-by: James Morse <james.morse@arm.com>
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>