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Merge "docs(ras): document RAS considerations with powerdown" into integration

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Manish V Badarkhe 2025-03-04 14:25:20 +01:00 • committed by TrustedFirmware Code Review
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docs/porting-guide.rst
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@ -3459,6 +3459,18 @@ This API is used to setup the early console, it is required only if the flag
External Abort handling and RAS Support
---------------------------------------
If any cores on the platform support powerdown abandon (i.e. ``FEAT_PABANDON``
is set, check the "Core powerup and powerdown sequence" in their TRMs), then
these functions should be able to handle being called with power domains off and
after the powerdown ``wfi``. In other words it may run after a call to
``pwr_domain_suspend()`` and before a call to ``pwr_domain_suspend_finish()``
(and their power off counterparts).
Should this not be desirable, or if there is no powerdown abandon support, then
RAS errors should be masked by writing any relevant error records in any
powerdown hooks to prevent deadlocks due to a RAS error after the point of no
return. See the core's TRM for further information.
Function : plat_ea_handler
~~~~~~~~~~~~~~~~~~~~~~~~~~