SMSTART Enables access to Streaming SVE mode and SME architectural state This instruction enables access to Streaming SVE mode and SME architectural state. SMSTART enters Streaming SVE mode, and enables the SME ZA storage. SMSTART SM enters Streaming SVE mode, but does not enable the SME ZA storage. SMSTART ZA enables the SME ZA storage, but does not cause an entry to Streaming SVE mode. MSR (immediate) 1 1 0 1 0 1 0 1 0 0 0 0 0 0 1 1 0 1 0 0 0 x x 1 0 1 1 1 1 1 1 1 SMSTART {<option>} MSR <pstatefield>, #1 Unconditionally <option> Is an optional mode, CRm<3:1> <option> Description 000 RESERVED 001 SM Maps to <pstatefield> SVCRSM. 010 ZA Maps to <pstatefield> SVCRZA. 011 [absent] Maps to <pstatefield> SVCRSMZA.