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SME requires similar setup to that for SVE: disable traps to EL2 and
make sure that the maximum vector length is available to EL1, for SME we
have two traps - one for SME itself and one for TPIDR2.
In addition since we currently make no active use of priority control
for SCMUs we map all SME priorities lower ELs may configure to 0, the
architecture specified minimum priority, to ensure that nothing we
manage is able to configure itself to consume excessive resources. This
will need to be revisited should there be a need to manage SME
priorities at runtime.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419112247.711548-8-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
b2cf6a2328