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fix(ras): remove RAS_FFH_SUPPORT and introduce FFH_SUPPORT

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This patch removes RAS_FFH_SUPPORT macro which is the combination of
ENABLE_FEAT_RAS and HANDLE_EA_EL3_FIRST_NS. Instead introduce an
internal macro FFH_SUPPORT which gets enabled when platforms wants
to enable lower EL EA handling at EL3. The internal macro FFH_SUPPORT
will be automatically enabled if HANDLE_EA_EL3_FIRST_NS is enabled.
FFH_SUPPORT along with ENABLE_FEAT_RAS will be used in source files
to provide equivalent check which was provided by RAS_FFH_SUPPORT
earlier. In generic code we needed a macro which could abstract both
HANDLE_EA_EL3_FIRST_NS and RAS_FFH_SUPPORT macros that had limitations.
Former was tied up with NS world only while the latter was tied to RAS
feature.

This is to allow Secure/Realm world to have their own FFH macros
in future.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: Ie5692ccbf462f5dcc3f005a5beea5aa35124ac73
This commit is contained in:
Manish Pandey 2023-10-10 15:42:19 +01:00
parent 970a4a8d8c
commit f87e54f73c
29 changed files with 78 additions and 75 deletions
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7
docs/getting_started/build-internals.rst
View file

@ -12,3 +12,10 @@ depends on certain options to be enabled or disabled.
interest when Armv8.4-SecEL2 or RME extension is implemented.
Default is 0 (disabled). This option will be set to 1 (enabled) when ``SPD=spmd``
and ``SPMD_SPM_AT_SEL2`` is set or when ``ENABLE_RME`` is set to 1 (enabled).
- ``FFH_SUPPORT``: This boolean option provides support to enable Firmware First
handling (FFH) of External aborts and SError interrupts originating from lower
ELs which gets trapped in EL3. This option will be set to 1 (enabled) if
``HANDLE_EA_EL3_FIRST_NS`` is set. Currently only NS world routes EA to EL3 but
in future when Secure/Realm wants to use FFH then they can introduce new macros
which will enable this option implicitly.

6
docs/getting_started/build-options.rst
View file

@ -811,17 +811,13 @@ Common build options
- ``PSCI_OS_INIT_MODE``: Boolean flag to enable support for optional PSCI
OS-initiated mode. This option defaults to 0.
- ``ENABLE_FEAT_RAS``: Numeric value to enable Armv8.2 RAS features. RAS features
- ``ENABLE_FEAT_RAS``: Boolean flag to enable Armv8.2 RAS features. RAS features
are an optional extension for pre-Armv8.2 CPUs, but are mandatory for Armv8.2
or later CPUs. This flag can take the values 0 or 1. The default value is 0.
NOTE: This flag enables use of IESB capability to reduce entry latency into
EL3 even when RAS error handling is not performed on the platform. Hence this
flag is recommended to be turned on Armv8.2 and later CPUs.
- ``RAS_FFH_SUPPORT``: Support to enable Firmware first handling of RAS errors
originating from NS world. When ``RAS_FFH_SUPPORT`` is set to ``1``,
``HANDLE_EA_EL3_FIRST_NS`` and ``ENABLE_FEAT_RAS`` must also be set to ``1``.
- ``RESET_TO_BL31``: Enable BL31 entrypoint as the CPU reset vector instead
of the BL1 entrypoint. It can take the value 0 (CPU reset to BL1
entrypoint) or 1 (CPU reset to BL31 entrypoint).