CPP

Cache prefetch prediction restriction by context

This instruction prevents cache allocation predictions that predict execution addresses based on information gathered from earlier execution within a particular execution context. The actions of code in the target execution context or contexts appearing in program order before the instruction cannot exploitatively control cache prefetch predictions occurring after the instruction is complete and synchronized.

For more information, see CPP RCTX, Cache Prefetch Prediction Restriction by Context.

Encoding: System

Variants: FEAT_SPECRES (PROFILE_R)

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
1	1	0	1	0	1	0	1	0	0	0	0	1	0	1	1	0	1	1	1	0	0	1	1	1	1	1
										L			op1			CRn				CRm				op2			Rt

CPP RCTX, <Xt>

Equivalent to: SYS #3, C7, C3, #7, <Xt>

Explanations

<Xt>: Is the 64-bit name of the general-purpose source register, encoded in the "Rt" field.