SPMEVFILTR<n>_EL0 System Performance Monitors Event Filter Control Register when FEAT_SPMU is implemented and FEAT_AA64 is implemented 0 63 With SPMEVTYPER<n>_EL0 and SPMEVFILT2R<n>_EL0, configures when event counter SPMEVCNTR<n>_EL0 in System PMU <s> increments. The contents of this register are IMPLEMENTATION DEFINED. For more information, see SPMEVTYPER<n>_EL0. Unknown SPMEVFILTR<n>_EL0 is a 64-bit register. IMPLEMENTATION DEFINED 63 0 63:0 IMPLEMENTATION DEFINED. ID To access SPMEVFILTR<n>_EL0 for System PMU <s>, set SPMSELR_EL0.SYSPMUSEL to s and SPMSELR_EL0.BANK to n[5:4]. SPMEVFILTR<n>_EL0 reads-as-zero and ignores writes if any of the following are true: Event counter <n> is not implemented by System PMU <s>. System PMU <s> is not implemented. 0-15 MRS <Xt>, SPMEVFILTR<m>_EL0 let m:integer = UInt(CRm[0] :: op2[2:0]); if !(IsFeatureImplemented(FEAT_SPMU) && IsFeatureImplemented(FEAT_AA64)) then Undefined(); elsif PSTATE.EL == EL0 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPM2 == '0' then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then Undefined(); elsif MDSCR_EL1().EnSPM == '0' then if EL2Enabled() && HCR_EL2().TGE == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else AArch64_SystemAccessTrap(EL1, 0x18); end; elsif !ELIsInHost(EL0) && SPMACCESSR_EL1()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then if EL2Enabled() && HCR_EL2().TGE == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else AArch64_SystemAccessTrap(EL1, 0x18); end; elsif EL2Enabled() && !ELIsInHost(EL0) && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3().FGTEn2 == '0') || HDFGRTR2_EL2().nSPMEVTYPERn_EL0 == '0') then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2().EnSPM == '0' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && SPMACCESSR_EL2()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3().EnPM2 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif !IsSPMUCounterImplemented(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) then X{64}(t) = Zeros{64}; else X{64}(t) = SPMEVFILTR_EL0(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m); end; elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPM2 == '0' then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then Undefined(); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3().FGTEn2 == '0') || HDFGRTR2_EL2().nSPMEVTYPERn_EL0 == '0') then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2().EnSPM == '0' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && SPMACCESSR_EL2()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3().EnPM2 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif !IsSPMUCounterImplemented(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) then X{64}(t) = Zeros{64}; else X{64}(t) = SPMEVFILTR_EL0(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPM2 == '0' then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then Undefined(); elsif HaveEL(EL3) && MDCR_EL3().EnPM2 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] == '00' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif !IsSPMUCounterImplemented(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) then X{64}(t) = Zeros{64}; else X{64}(t) = SPMEVFILTR_EL0(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m); end; elsif PSTATE.EL == EL3 then if !IsSPMUCounterImplemented(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) then X{64}(t) = Zeros{64}; else X{64}(t) = SPMEVFILTR_EL0(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m); end; end; 0-15 MSR SPMEVFILTR<m>_EL0, <Xt> let m:integer = UInt(CRm[0] :: op2[2:0]); if !(IsFeatureImplemented(FEAT_SPMU) && IsFeatureImplemented(FEAT_AA64)) then Undefined(); elsif PSTATE.EL == EL0 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPM2 == '0' then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then Undefined(); elsif MDSCR_EL1().EnSPM == '0' then if EL2Enabled() && HCR_EL2().TGE == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else AArch64_SystemAccessTrap(EL1, 0x18); end; elsif !ELIsInHost(EL0) && SPMACCESSR_EL1()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then if EL2Enabled() && HCR_EL2().TGE == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else AArch64_SystemAccessTrap(EL1, 0x18); end; elsif EL2Enabled() && !ELIsInHost(EL0) && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3().FGTEn2 == '0') || HDFGWTR2_EL2().nSPMEVTYPERn_EL0 == '0') then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2().EnSPM == '0' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && SPMACCESSR_EL2()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3().EnPM2 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif !IsSPMUCounterImplemented(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) then return; else SPMEVFILTR_EL0(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) = X{64}(t); end; elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPM2 == '0' then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then Undefined(); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3().FGTEn2 == '0') || HDFGWTR2_EL2().nSPMEVTYPERn_EL0 == '0') then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2().EnSPM == '0' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && SPMACCESSR_EL2()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3().EnPM2 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif !IsSPMUCounterImplemented(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) then return; else SPMEVFILTR_EL0(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) = X{64}(t); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPM2 == '0' then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then Undefined(); elsif HaveEL(EL3) && MDCR_EL3().EnPM2 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && SPMACCESSR_EL3()[UInt(SPMSELR_EL0().SYSPMUSEL) * 2+:2] != '11' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif !IsSPMUCounterImplemented(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) then return; else SPMEVFILTR_EL0(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) = X{64}(t); end; elsif PSTATE.EL == EL3 then if !IsSPMUCounterImplemented(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) then return; else SPMEVFILTR_EL0(UInt(SPMSELR_EL0().SYSPMUSEL), (UInt(SPMSELR_EL0().BANK) * 16) + m) = X{64}(t); end; end; 2026-03-26 20:27:25 2026-03_rel