MPAMVPM1

MPAMIDR_EL1.VPMR_MAX field gives the index of the highest implemented MPAMVPM0_EL2 to MPAMVPM7_EL2 registers. VPMR_MAX can be as large as 7 (8 registers) or 32 virtual PARTIDs. If MPAMIDR_EL1.VPMR_MAX == 0, there is only a single MPAMVPM<n>_EL2 register, MPAMVPM0_EL2.

Virtual PARTID mapping is enabled by MPAMHCR_EL2.EL1_VPMEN for PARTIDs in MPAM1_EL1 and by MPAMHCR_EL2.EL0_VPMEN for PARTIDs in MPAM0_EL1.

A virtual-to-physical PARTID mapping entry, PhyPARTID<n>, is valid only when the MPAMVPMV_EL2.VPM_V bit in bit position n is set to 1.

Configuration

This register is present only when FEAT_MPAM is implemented, MPAMIDR_EL1.HAS_HCR == 1 and UInt(MPAMIDR_EL1.VPMR_MAX) > 0. Otherwise, direct accesses to MPAMVPM1_EL2 are UNDEFINED.

This register has no effect if EL2 is not enabled in the current Security state.

Attributes

Field descriptions

PhyPARTID7, bits [63:48]

PhyPARTID6, bits [47:32]

PhyPARTID5, bits [31:16]

PhyPARTID4, bits [15:0]

Accessing MPAMVPM1_EL2

Accesses to this register use the following encodings in the System register encoding space:

MRS <Xt>, MPAMVPM1_EL2

op0	op1	CRn	CRm	op2
0b11	0b100	0b1010	0b0110	0b001

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && HCR_EL2.<NV2,NV> == '11' then X[t, 64] = NVMem[0x948]; elsif EL2Enabled() && HCR_EL2.NV == '1' then if HaveEL(EL3) && MPAM3_EL3.TRAPLOWER == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else AArch64.SystemAccessTrap(EL2, 0x18); else UNDEFINED; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && MPAM3_EL3.TRAPLOWER == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = MPAMVPM1_EL2; elsif PSTATE.EL == EL3 then X[t, 64] = MPAMVPM1_EL2;

MSR MPAMVPM1_EL2, <Xt>

op0	op1	CRn	CRm	op2
0b11	0b100	0b1010	0b0110	0b001

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && HCR_EL2.<NV2,NV> == '11' then NVMem[0x948] = X[t, 64]; elsif EL2Enabled() && HCR_EL2.NV == '1' then if HaveEL(EL3) && MPAM3_EL3.TRAPLOWER == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else AArch64.SystemAccessTrap(EL2, 0x18); else UNDEFINED; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && MPAM3_EL3.TRAPLOWER == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else MPAMVPM1_EL2 = X[t, 64]; elsif PSTATE.EL == EL3 then MPAMVPM1_EL2 = X[t, 64];

63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48	47	46	45	44	43	42	41	40	39	38	37	36	35	34	33	32
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
PhyPARTID7																PhyPARTID6
PhyPARTID5																PhyPARTID4

MPAMVPM1_EL2, MPAM Virtual PARTID Mapping Register 1

Purpose