Controls access to System PMUs from EL0.
This register is present only when FEAT_SPMU is implemented. Otherwise, direct accesses to SPMACCESSR_EL1 are UNDEFINED.
SPMACCESSR_EL1 is a 64-bit register.
| 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 |
| P31 | P30 | P29 | P28 | P27 | P26 | P25 | P24 | P23 | P22 | P21 | P20 | P19 | P18 | P17 | P16 | ||||||||||||||||
| P15 | P14 | P13 | P12 | P11 | P10 | P9 | P8 | P7 | P6 | P5 | P4 | P3 | P2 | P1 | P0 | ||||||||||||||||
System PMU <m> access. Controls access to System PMU <m>.
| P<m> | Meaning |
|---|---|
| 0b00 |
MRS read and MSR write System register accesses to System PMU <m> at EL0 are trapped to EL1, unless the instruction generates a higher priority exception. |
| 0b01 |
MSR write System register accesses to System PMU <m> at EL0 are trapped to EL1, unless the instruction generates a higher priority exception. |
| 0b11 |
This control does not cause any instructions to be trapped. |
All other values are reserved.
The registers trapped by this control are:
AArch64: SPMCNTENCLR_EL0, SPMCNTENSET_EL0, SPMCR_EL0, SPMEVCNTR<n>_EL0, SPMEVFILT2R<n>_EL0, SPMEVFILTR<n>_EL0, SPMEVTYPER<n>_EL0, SPMOVSCLR_EL0, and SPMOVSSET_EL0.
This field is ignored by the PE when all of the following are true:
The reset behavior of this field is:
Accessing this field has the following behavior:
Accesses to this register use the following encodings in the System register encoding space:
MRS <Xt>, SPMACCESSR_EL1
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b10 | 0b000 | 0b1001 | 0b1101 | 0b011 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3.EnPM2 == '0' then UNDEFINED; elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3.FGTEn2 == '0') || HDFGRTR2_EL2.nSPMACCESSR_EL1 == '0') then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.EnSPM == '0' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.EnPM2 == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif EffectiveHCR_EL2_NVx() == '111' then X[t, 64] = NVMem[0x8E8]; else X[t, 64] = SPMACCESSR_EL1; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3.EnPM2 == '0' then UNDEFINED; elsif HaveEL(EL3) && MDCR_EL3.EnPM2 == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif ELIsInHost(EL2) then X[t, 64] = SPMACCESSR_EL2; else X[t, 64] = SPMACCESSR_EL1; elsif PSTATE.EL == EL3 then X[t, 64] = SPMACCESSR_EL1;
MSR SPMACCESSR_EL1, <Xt>
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b10 | 0b000 | 0b1001 | 0b1101 | 0b011 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3.EnPM2 == '0' then UNDEFINED; elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3.FGTEn2 == '0') || HDFGWTR2_EL2.nSPMACCESSR_EL1 == '0') then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.EnSPM == '0' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.EnPM2 == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif EffectiveHCR_EL2_NVx() == '111' then NVMem[0x8E8] = X[t, 64]; else SPMACCESSR_EL1 = X[t, 64]; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3.EnPM2 == '0' then UNDEFINED; elsif HaveEL(EL3) && MDCR_EL3.EnPM2 == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif ELIsInHost(EL2) then SPMACCESSR_EL2 = X[t, 64]; else SPMACCESSR_EL1 = X[t, 64]; elsif PSTATE.EL == EL3 then SPMACCESSR_EL1 = X[t, 64];
MRS <Xt>, SPMACCESSR_EL12
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b10 | 0b101 | 0b1001 | 0b1101 | 0b011 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() == '101' then X[t, 64] = NVMem[0x8E8]; elsif EffectiveHCR_EL2_NVx() IN {'xx1'} then AArch64.SystemAccessTrap(EL2, 0x18); else UNDEFINED; elsif PSTATE.EL == EL2 then if ELIsInHost(EL2) then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3.EnPM2 == '0' then UNDEFINED; elsif HaveEL(EL3) && MDCR_EL3.EnPM2 == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = SPMACCESSR_EL1; else UNDEFINED; elsif PSTATE.EL == EL3 then if ELIsInHost(EL2) then X[t, 64] = SPMACCESSR_EL1; else UNDEFINED;
MSR SPMACCESSR_EL12, <Xt>
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b10 | 0b101 | 0b1001 | 0b1101 | 0b011 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() == '101' then NVMem[0x8E8] = X[t, 64]; elsif EffectiveHCR_EL2_NVx() IN {'xx1'} then AArch64.SystemAccessTrap(EL2, 0x18); else UNDEFINED; elsif PSTATE.EL == EL2 then if ELIsInHost(EL2) then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3.EnPM2 == '0' then UNDEFINED; elsif HaveEL(EL3) && MDCR_EL3.EnPM2 == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else SPMACCESSR_EL1 = X[t, 64]; else UNDEFINED; elsif PSTATE.EL == EL3 then if ELIsInHost(EL2) then SPMACCESSR_EL1 = X[t, 64]; else UNDEFINED;