Manish Pandey 714a1a93d1 fix(cpufeat): extend FEAT_EBEP handling to delegate PMU control to EL2 ...

Currently, the FEAT_EBEP feature presence check is only used for UNDEF
injection into lower ELs. However, this feature also affects the access
behavior of MDCR_EL2. Specifically, if the PMEE bits in MDCR_EL3 are not
set to 0b01, then the MDCR_EL2.PMEE bits cannot be configured by EL2.

This patch extends the use of FEAT_EBEP to delegate PMU IRQ and
profiling exception control to EL2 by setting MDCR_EL3.PMEE = 0b01.This
ensures that lower ELs can manage PMU configuration.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: Ib7e1d5c72f017b8ffc2131fc57309dd9d811c973

2025-11-04 15:51:47 +00:00

..

aarch32

fix(pmu): fix breakage on ARMv7 CPUs with SP_min as BL32

2024-04-02 16:17:03 +02:00

aarch64

fix(cpufeat): extend FEAT_EBEP handling to delegate PMU control to EL2

2025-11-04 15:51:47 +00:00