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MPAMVPMV_EL2, MPAM Virtual Partition Mapping Valid Register

The MPAMVPMV_EL2 characteristics are:

Purpose

Valid bits for virtual PARTID mapping entries. Each bit m corresponds to virtual PARTID mapping entry m in the MPAMVPM<n>_EL2 registers where n = m >> 2.

Configuration

This register is present only when MPAM is implemented and MPAMIDR_EL1.HAS_HCR == 1. Otherwise, direct accesses to MPAMVPMV_EL2 are UNDEFINED.

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

RW fields in this register reset to architecturally UNKNOWN values.

Attributes

MPAMVPMV_EL2 is a 64-bit register.

Field descriptions

The MPAMVPMV_EL2 bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
RES0
VPM_V<m>, bit [m], for m = 0 to 31
313029282726252423222120191817161514131211109876543210

Bits [63:32]

Reserved, RES0.

VPM_V<m>, bit [m], for m = 0 to 31

Contains valid bit for virtual PARTID mapping entry corresponding to virtual PARTID<m>.

This field resets to an architecturally UNKNOWN value.

Accessing the MPAMVPMV_EL2

Accesses to this register use the following encodings:

MRS <Xt>, MPAMVPMV_EL2

op0op1CRnCRmop2
0b110b1000b10100b01000b001
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && HCR_EL2.<NV2,NV> == '11' then
        return NVMem[0x938];
    elsif EL2Enabled() && HCR_EL2.NV == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    else
        UNDEFINED;
elsif PSTATE.EL == EL2 then
    return MPAMVPMV_EL2;
elsif PSTATE.EL == EL3 then
    return MPAMVPMV_EL2;
              

MSR MPAMVPMV_EL2, <Xt>

op0op1CRnCRmop2
0b110b1000b10100b01000b001
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && HCR_EL2.<NV2,NV> == '11' then
        NVMem[0x938] = X[t];
    elsif EL2Enabled() && HCR_EL2.NV == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    else
        UNDEFINED;
elsif PSTATE.EL == EL2 then
    MPAMVPMV_EL2 = X[t];
elsif PSTATE.EL == EL3 then
    MPAMVPMV_EL2 = X[t];
              


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