TLBI ASIDE1IS, TLBI ASIDE1ISNXS TLB Invalidate by ASID, EL1, Inner Shareable when FEAT_AA64 is implemented Invalidates cached copies of translation table entries from TLBs that meet all the following requirements: The entry is a stage 1 translation table entry. The entry would be used for the specified ASID, and either: Is from a level of lookup above the final level. Is a non-global entry from the final level of lookup. When EL2 is implemented and enabled in the current Security state: If the Effective value of HCR_EL2.{E2H, TGE} is not {1, 1}, the entry would be used with the current VMID and would be required to translate an address using the EL1&0 translation regime for the Security state. If the Effective value of HCR_EL2.{E2H, TGE} is {1, 1}, the entry would be required to translate an address using the EL2&0 translation regime for the Security state. When EL2 is not implemented or is disabled in the current Security state, the entry would be required to translate an address using the EL1&0 translation regime for the Security state. The Security state is indicated by the value of SCR_EL3.NS if FEAT_RME is not implemented, or SCR_EL3.{NSE, NS} if FEAT_RME is implemented. The invalidation applies to all PEs in the same Inner Shareable shareability domain as the PE that executes this System instruction. If FEAT_XS is implemented, the nXS variant of this System instruction is defined. It is IMPLEMENTATION SPECIFIC whether the TLBI System instruction with the nXS qualifier invalidates TLB entries with the XS attribute set to 1. The TLBI System instruction without the nXS qualifier waits for all memory accesses using in-scope old translation information to complete before it is considered complete. The TLBI System instruction with the nXS qualifier is considered complete when the subset of these memory accesses with XS attribute set to 0 are complete. TLB TLBI ASIDE1IS, TLBI ASIDE1ISNXS is a 64-bit System instruction. ASID 63 48 63:48 ASID value to match. Any appropriate TLB entries that match the ASID values will be affected by this System instruction. If the implementation supports 16 bits of ASID, then the upper 8 bits of the ASID must be written to 0 by software when the context being invalidated only uses 8 bits. 47 0 47:0 Reserved, RES0. This system instruction is an alias of the SYS instruction. The following pseudocode describes traps which apply to the System instruction. For information about changes to the scope of the invalidation to the instruction under different conditions, see AArch64_TLBI_ASID() in the Pseudocode for AArch64 operation. TLBI ASIDE1IS{, <Xt>} if !IsFeatureImplemented(FEAT_AA64) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if EL2Enabled() && (HCR_EL2().TTLB == '1' || HCR_EL2().TTLBIS == '1') then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && HFGITR_EL2().TLBIASIDE1IS == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else AArch64_TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID(), Broadcast_ISH, TLBI_AllAttr, X{64}(t)); end; elsif PSTATE.EL == EL2 then AArch64_TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID(), Broadcast_ISH, TLBI_AllAttr, X{64}(t)); elsif PSTATE.EL == EL3 then if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL1) then return; else AArch64_TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID(), Broadcast_ISH, TLBI_AllAttr, X{64}(t)); end; end; TLBI ASIDE1ISNXS{, <Xt>} When FEAT_XS is implemented if !IsFeatureImplemented(FEAT_AA64) then Undefined(); elsif !IsFeatureImplemented(FEAT_XS) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if EL2Enabled() && (HCR_EL2().TTLB == '1' || HCR_EL2().TTLBIS == '1') then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && IsFeatureImplemented(FEAT_HCX) && (!IsHCRXEL2Enabled() || HCRX_EL2().FGTnXS == '0') && HFGITR_EL2().TLBIASIDE1IS == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else AArch64_TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID(), Broadcast_ISH, TLBI_ExcludeXS, X{64}(t)); end; elsif PSTATE.EL == EL2 then AArch64_TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID(), Broadcast_ISH, TLBI_ExcludeXS, X{64}(t)); elsif PSTATE.EL == EL3 then if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL1) then return; else AArch64_TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID(), Broadcast_ISH, TLBI_ExcludeXS, X{64}(t)); end; end; 2026-03-26 20:27:25 2026-03_rel