aarch64: Enable SPE for the non-secure world
MDCR_EL3.NSPB resets to an UNKNOWN value. Configure it to allow the
profiling buffer to use non-secure memory and to permit direct register
accesses from the non-secure world.
So far, we haven't programmed MDCR_EL3 explicitly even though there are
other fields which reset to an UNKNOWN value. The majority of those, when
cleared, allow lower exception levels to use the features they control; for
the other fields we don't have support yet. Reset the register to zero
with the exception of MDCR_EL3.NSPB.
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
1 file changed
