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feat(debugv8p9): add support for FEAT_Debugv8p9

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This patch enables FEAT_Debugv8p9 and prevents EL1/0 from
trapping to EL3 when accessing MDSELR_EL1 register by
setting the MDCR_EL3.EBWE bit.

Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: I3613af1dd8cb8c0d3c33dc959f170846c0b9695a
This commit is contained in:
Arvind Ram Prakash 2024-05-22 15:24:00 -05:00
parent 847cee8c64
commit 83271d5a5a
12 changed files with 102 additions and 1 deletions
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6
docs/getting_started/build-options.rst
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@ -320,6 +320,12 @@ Common build options
The flag can take values 0 to 2, to align with the ``ENABLE_FEAT``
mechanism. Default value is ``0``.
- ``ENABLE_FEAT_DEBUGV8P9``: Numeric value to enable ``FEAT_DEBUGV8P9``
extension which allows the ability to implement more than 16 breakpoints
and/or watchpoints. This feature is mandatory from v8.9 and is optional
from v8.8. This flag can take the values of 0 to 2, to align with the
``ENABLE_FEAT`` mechanism. Default value is ``0``.
- ``ENABLE_FEAT_DIT``: Numeric value to enable ``FEAT_DIT`` (Data Independent
Timing) extension. It allows setting the ``DIT`` bit of PSTATE in EL3.
``FEAT_DIT`` is a mandatory architectural feature and is enabled from v8.4