On Mon, Feb 07, 2022 at 03:20:44PM +0000, Mark Brown wrote: > In SME the use of both streaming SVE mode and ZA are tracked through > PSTATE.SM and PSTATE.ZA, visible through the system register SVCR. In > order to context switch the floating point state for SME we need to > context switch the contents of this register as part of context > switching the floating point state. > > Since changing the vector length exits streaming SVE mode and disables > ZA we also make sure we update SVCR appropriately when setting vector > length, and similarly ensure that new threads have streaming SVE mode > and ZA disabled. > > Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>
