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fix(cpus): workaround for Cortex-X2 erratum 2742423

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Cortex-X2 erratum 2742423 is a Cat B erratum that applies to all
revisions <= r2p1 and is still open.
The workaround is to set CPUACTLR5_EL1[56:55] to 2'b01.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-1775100/latest

Change-Id: I03897dc2a7f908937612c2b66ce7a043c1b7575d
Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
This commit is contained in:
Bipin Ravi 2023-10-17 09:11:19 -05:00 • committed by laurenw-arm
parent d7bc2cb430
commit fe06e118ab
4 changed files with 19 additions and 2 deletions
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4
docs/design/cpu-specific-build-macros.rst
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@ -733,6 +733,10 @@ For Cortex-X2, the following errata build flags are defined :
This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 and is
still open.
- ``ERRATA_X2_2742423``: This applies errata 2742423 workaround to Cortex-X2
CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the
CPU and is still open.
- ``ERRATA_X2_2768515``: This applies errata 2768515 workaround to Cortex-X2
CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the
CPU and is still open.