fix(cm): set MDCR_EL3.{NSPBE, STE} explicitly

With the introduction of FEAT_RME MDCR_EL3 bits NSPB and NSPBE depend on
each other. The enable code relies on the register being initialised to
zero an

fix(cm): set MDCR_EL3.{NSPBE, STE} explicitly

With the introduction of FEAT_RME MDCR_EL3 bits NSPB and NSPBE depend on
each other. The enable code relies on the register being initialised to
zero and omits to reset NSPBE. However, this is not obvious. Reset the
bit explicitly to document this.

Similarly, reset the STE bit , since it's part of the feature enablement.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: I3714507bae10042cdccd2b7bc713b31d4cdeb02f

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refactor(cpufeat): separate the EL2 and EL3 enablement code

Combining the EL2 and EL3 enablement code necessitates that it must be
called at el3_exit, which is the only place with enough context to

refactor(cpufeat): separate the EL2 and EL3 enablement code

Combining the EL2 and EL3 enablement code necessitates that it must be
called at el3_exit, which is the only place with enough context to make
the decision of what needs to be set.
Decouple them to allow them to be called from elsewhere.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: I147764c42771e7d4100699ec8fae98dac0a505c0

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refactor(trf): enable FEAT_TRF for FEAT_STATE_CHECKED

At the moment we only support FEAT_TRF to be either unconditionally
compiled in, or to be not supported at all.

Add support for runtime detecti

refactor(trf): enable FEAT_TRF for FEAT_STATE_CHECKED

At the moment we only support FEAT_TRF to be either unconditionally
compiled in, or to be not supported at all.

Add support for runtime detection (ENABLE_TRF_FOR_NS=2), by splitting
is_feat_trf_present() into an ID register reading function and a second
function to report the support status. That function considers both
build time settings and runtime information (if needed), and is used
before we access TRF related registers.
Also move the context saving code from assembly to C, and use the new
is_feat_trf_supported() function to guard its execution.

The FVP platform decided to compile in support unconditionally (=1),
even though FEAT_TRF is an ARMv8.4 feature, so is not available with the
FVP model's default command line.
Change that to the now supported dynamic option (=2), so the right
decision can be made by the code at runtime.

Change-Id: Ia97b01adbe24970a4d837afd463dc5506b7295a3
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

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feat(trf): enable trace filter control register access from lower NS EL

Introduced a build flag 'ENABLE_TRF_FOR_NS' to enable trace filter
control registers access in NS-EL2, or NS-EL1 (when NS-EL2

feat(trf): enable trace filter control register access from lower NS EL

Introduced a build flag 'ENABLE_TRF_FOR_NS' to enable trace filter
control registers access in NS-EL2, or NS-EL1 (when NS-EL2 is
implemented but unused).

Change-Id: If3f53b8173a5573424b9a405a4bd8c206ffdeb8c
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

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