MPAMVPM3_EL2, MPAM Virtual PARTID Mapping Register 3

The MPAMVPM3_EL2 characteristics are:

Purpose

MPAMVPM3_EL2 provides mappings from virtual PARTIDs 12 - 15 to physical PARTIDs.

MPAMIDR_EL1.VPMR_MAX field gives the index of the highest implemented MPAMVPM<n>_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) > 2. Otherwise, direct accesses to MPAMVPM3_EL2 are UNDEFINED.

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

Attributes

MPAMVPM3_EL2 is a 64-bit register.

Field descriptions

6362616059585756555453525150494847464544434241403938373635343332
313029282726252423222120191817161514131211109876543210
PhyPARTID15PhyPARTID14
PhyPARTID13PhyPARTID12

PhyPARTID15, bits [63:48]

Virtual PARTID Mapping Entry for virtual PARTID 15. PhyPARTID15 gives the mapping of virtual PARTID 15 to a physical PARTID.

The reset behavior of this field is:

PhyPARTID14, bits [47:32]

Virtual PARTID Mapping Entry for virtual PARTID 14. PhyPARTID14 gives the mapping of virtual PARTID 14 to a physical PARTID.

The reset behavior of this field is:

PhyPARTID13, bits [31:16]

Virtual PARTID Mapping Entry for virtual PARTID 13. PhyPARTID13 gives the mapping of virtual PARTID 13 to a physical PARTID.

The reset behavior of this field is:

PhyPARTID12, bits [15:0]

Virtual PARTID Mapping Entry for virtual PARTID 12. PhyPARTID12 gives the mapping of virtual PARTID 12 to a physical PARTID.

The reset behavior of this field is:

Accessing MPAMVPM3_EL2

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

MRS <Xt>, MPAMVPM3_EL2

op0op1CRnCRmop2
0b110b1000b10100b01100b011

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() IN {'1x1'} then X[t, 64] = NVMem[0x958]; elsif EffectiveHCR_EL2_NVx() IN {'xx1'} then if HaveEL(EL3) && MPAM3_EL3.TRAPLOWER == '1' then if EL3SDDUndef() 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 EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = MPAMVPM3_EL2; elsif PSTATE.EL == EL3 then X[t, 64] = MPAMVPM3_EL2;

MSR MPAMVPM3_EL2, <Xt>

op0op1CRnCRmop2
0b110b1000b10100b01100b011

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() IN {'1x1'} then NVMem[0x958] = X[t, 64]; elsif EffectiveHCR_EL2_NVx() IN {'xx1'} then if HaveEL(EL3) && MPAM3_EL3.TRAPLOWER == '1' then if EL3SDDUndef() 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 EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else MPAMVPM3_EL2 = X[t, 64]; elsif PSTATE.EL == EL3 then MPAMVPM3_EL2 = X[t, 64];


26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6

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