TLBI ASIDE1OS, TLBI ASIDE1OSNXS, TLB Invalidate by ASID, EL1, Outer Shareable

The TLBI ASIDE1OS, TLBI ASIDE1OSNXS characteristics are:

Purpose

Invalidates cached copies of translation table entries from TLBs that meet all the following requirements:

The invalidation applies to all PEs in the same Outer 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.

Both variants perform the same invalidation, but 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.

Configuration

This instruction is present only when FEAT_TLBIOS is implemented. Otherwise, direct accesses to TLBI ASIDE1OS, TLBI ASIDE1OSNXS are UNDEFINED.

Attributes

TLBI ASIDE1OS, TLBI ASIDE1OSNXS is a 64-bit System instruction.

Field descriptions

The TLBI ASIDE1OS, TLBI ASIDE1OSNXS input value bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
ASIDRES0
RES0
313029282726252423222120191817161514131211109876543210

ASID, bits [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.

Bits [47:0]

Reserved, RES0.

Executing the TLBI ASIDE1OS, TLBI ASIDE1OSNXS instruction

Accesses to this instruction use the following encodings:

TLBI ASIDE1OS{, <Xt>}

op0op1CRnCRmop2
0b010b0000b10000b00010b010

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && HCR_EL2.TTLB == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && HCR_EL2.TTLBOS == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGITR_EL2.TLBIASIDE1OS == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else if IsFeatureImplemented(FEAT_XS) && HCRX_EL2.FnXS == '1' then TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_Outer, TLBI_ExcludeXS, X[t]); else TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_Outer, TLBI_AllAttr, X[t]); elsif PSTATE.EL == EL2 then if HCR_EL2.<E2H,TGE> == '11' then TLBI_ASID(SecurityStateAtEL(EL2), Regime_EL20, VMID_NONE, Shareability_Outer, TLBI_AllAttr, X[t]); else TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_Outer, TLBI_AllAttr, X[t]); elsif PSTATE.EL == EL3 then if HCR_EL2.<E2H,TGE> == '11' then TLBI_ASID(SecurityStateAtEL(EL2), Regime_EL20, VMID_NONE, Shareability_Outer, TLBI_AllAttr, X[t]); else TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_Outer, TLBI_AllAttr, X[t]);

TLBI ASIDE1OSNXS{, <Xt>}

op0op1CRnCRmop2
0b010b0000b10010b00010b010

if !IsFeatureImplemented(FEAT_XS) then UNDEFINED; elsif PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && HCR_EL2.TTLBOS == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HCRX_EL2.FGTnXS == '0' && HFGITR_EL2.TLBIASIDE1OS == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_Outer, TLBI_ExcludeXS, X[t]); elsif PSTATE.EL == EL2 then if HCR_EL2.<E2H,TGE> == '11' then TLBI_ASID(SecurityStateAtEL(EL2), Regime_EL20, VMID_NONE, Shareability_Outer, TLBI_ExcludeXS, X[t]); else TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_Outer, TLBI_ExcludeXS, X[t]); elsif PSTATE.EL == EL3 then if HCR_EL2.<E2H,TGE> == '11' then TLBI_ASID(SecurityStateAtEL(EL2), Regime_EL20, VMID_NONE, Shareability_Outer, TLBI_ExcludeXS, X[t]); else TLBI_ASID(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_Outer, TLBI_ExcludeXS, X[t]);




30/09/2020 15:07; ccead0cb9f089f9ceec50268e82aec9e71047211

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