PMSDSFR_EL1 Sampling Data Source Filter Register when FEAT_SPE_FDS is implemented Controls sample filtering by Data Source. SPE PMSDSFR_EL1 is a 64-bit register. S<m> 63 0 63:0 S[<m>] is the Data Source filter for IMPLEMENTATION DEFINED Data Source <m>. 63 0 0b0 If PMSFCR_EL1.FDS is 1, do not record load operations that have bits [5:0] of the Data Source packet set to <m>. 0b1 Load operations with Data Source <m> are unaffected by PMSFCR_EL1.FDS. AU When filtering on Data Source <m> is not supported RAZ/WI MRS <Xt>, PMSDSFR_EL1 if !IsFeatureImplemented(FEAT_SPE_FDS) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPMS3 == '0' then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && CheckMDCR_EL3_NSPBTrap() then Undefined(); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3().FGTEn2 == '0') || HDFGRTR2_EL2().nPMSDSFR_EL1 == '0') then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2().TPMS == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3().EnPMS3 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && CheckMDCR_EL3_NSPBTrap() then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif EffectiveHCR_EL2_NVx() IN {'1x1'} then X{64}(t) = NVMem(0x858); else X{64}(t) = PMSDSFR_EL1(); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && CheckMDCR_EL3_NSPBTrap() then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPMS3 == '0' then Undefined(); elsif HaveEL(EL3) && CheckMDCR_EL3_NSPBTrap() then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && MDCR_EL3().EnPMS3 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else X{64}(t) = PMSDSFR_EL1(); end; elsif PSTATE.EL == EL3 then X{64}(t) = PMSDSFR_EL1(); end; MSR PMSDSFR_EL1, <Xt> if !IsFeatureImplemented(FEAT_SPE_FDS) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPMS3 == '0' then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && CheckMDCR_EL3_NSPBTrap() then Undefined(); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3().FGTEn2 == '0') || HDFGWTR2_EL2().nPMSDSFR_EL1 == '0') then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2().TPMS == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3().EnPMS3 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && CheckMDCR_EL3_NSPBTrap() then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif EffectiveHCR_EL2_NVx() IN {'1x1'} then NVMem(0x858) = X{64}(t); else PMSDSFR_EL1() = X{64}(t); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && CheckMDCR_EL3_NSPBTrap() then Undefined(); elsif HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().EnPMS3 == '0' then Undefined(); elsif HaveEL(EL3) && CheckMDCR_EL3_NSPBTrap() then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif HaveEL(EL3) && MDCR_EL3().EnPMS3 == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else PMSDSFR_EL1() = X{64}(t); end; elsif PSTATE.EL == EL3 then PMSDSFR_EL1() = X{64}(t); end; 2026-03-26 20:27:25 2026-03_rel