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Boyan KaratotevandGovindraj Raja 0d738b1c42 fix(cpus): only turn off CME when it is present
Patch 93c7e7019 made the old ERRATA_SME_POWER_DOWN specific to each CPU.
However it failed to account for the fact that some CPUs have SME
support configurable and unconditionally access the SVCR register. When
support isn't included, the lack of FEAT_SME will cause a trap. So add a
check to support both configurations.

Change-Id: Ic21bff5d51109ec6b3117f85f6d37f052076f49a
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
(cherry picked from commit aded7f53db)
2026-04-16 11:20:03 -05:00
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