tree 360ae461d8847cd4c54244f0212380f53ad4cecc
parent 82801654d713bffa95f3653f26036062e6225985
author Boyan Karatotev <boyan.karatotev@arm.com> 1665665465 +0100
committer Boyan Karatotev <boyan.karatotev@arm.com> 1665665465 +0100

fix(sme): add missing ISBs

EL3 is configured to trap accesses to SME registers (via
CPTR_EL3.ESM=0). To allow SME instructions, this needs to be temporarily
disabled before changing system registers. If the PE delays the effects
of writes to system registers then accessing the SME registers will trap
without an isb. This patch adds the isb to restore functionality.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: I8ee5ecaec978dde2525631daa682a182ad8f7f04