TLBI RVALE2OS, TLBI RVALE2OSNXS, TLB Range Invalidate by VA, Last level, EL2, Outer Shareable

The TLBI RVALE2OS, TLBI RVALE2OSNXS characteristics are:

Purpose

When EL2 is implemented and enabled in the current Security state, invalidates cached copies of translation table entries from TLBs that meet all the following requirements:

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 Outer Shareable shareability domain as the PE that executes this System instruction.

For 64-bit translation table entry, the range of addresses invalidated is UNPREDICTABLE when:

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_TLBIRANGE is implemented and FEAT_TLBIOS is implemented. Otherwise, direct accesses to TLBI RVALE2OS, TLBI RVALE2OSNXS are UNDEFINED.

Attributes

TLBI RVALE2OS, TLBI RVALE2OSNXS is a 64-bit System instruction.

Field descriptions

6362616059585756555453525150494847464544434241403938373635343332
313029282726252423222120191817161514131211109876543210
ASIDTGSCALENUMTTLBaseADDR
BaseADDR

ASID, bits [63:48]
When the Effective value of HCR_EL2.E2H is 1:

ASID value to match. Any TLB entries that match the ASID value and VA value will be affected by this System instruction.

Global TLB entries that match the VA value will be affected by this System instruction, regardless of the value of the ASID field.

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.


Otherwise:

Reserved, RES0.

TG, bits [47:46]

Translation granule size.

TGMeaning
0b00

Reserved.

0b01

4K translation granule.

0b10

16K translation granule.

0b11

64K translation granule.

The instruction takes a translation granule size for the translations that are being invalidated. If the translations used a different translation granule size than the one being specified, then the architecture does not require that the instruction invalidates any entries.

SCALE, bits [45:44]

The exponent element of the calculation that is used to produce the upper range.

NUM, bits [43:39]

The base element of the calculation that is used to produce the upper range.

TTL, bits [38:37]

TTL Level hint. The TTL hint is only guaranteed to invalidate:

TTLMeaning
0b00

The entries in the range can be using any level for the translation table entries.

0b01

The TTL hint indicates level 1.

If FEAT_LPA2 is not implemented, when using a 16KB translation granule, this value is reserved and hardware should treat this field as 0b00.

0b10

The TTL hint indicates level 2.

0b11

The TTL hint indicates level 3.

BaseADDR, bits [36:0]
When (FEAT_LPA2 is implemented and TCR_EL2.DS == 1) or (FEAT_D128 is implemented and TCR2_EL2.D128 == 1):

The starting address for the range of the maintenance instructions. This field is BaseADDR[52:16] for all translation granules.

When using a 4KB translation granule, BaseADDR[15:12] is treated as 0b0000.

When using a 16KB translation granule, BaseADDR[15:14] is treated as 0b00.


Otherwise:

The starting address for the range of the maintenance instruction.

When using a 4KB translation granule, this field is BaseADDR[48:12].

When using a 16KB translation granule, this field is BaseADDR[50:14].

When using a 64KB translation granule, this field is BaseADDR[52:16].

Executing TLBI RVALE2OS, TLBI RVALE2OSNXS

Accesses to this instruction use the following encodings in the System instruction encoding space:

TLBI RVALE2OS{, <Xt>}

op0op1CRnCRmop2
0b010b1000b10000b01010b101

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() IN {'xx1'} then AArch64.SystemAccessTrap(EL2, 0x18); else UNDEFINED; elsif PSTATE.EL == EL2 then if ELIsInHost(EL2) then AArch64.TLBI_RVA(SecurityStateAtEL(EL2), Regime_EL20, VMID_NONE, Shareability_OSH, TLBILevel_Last, TLBI_AllAttr, X[t, 64]); else AArch64.TLBI_RVA(SecurityStateAtEL(EL2), Regime_EL2, VMID[], Shareability_OSH, TLBILevel_Last, TLBI_AllAttr, X[t, 64]); elsif PSTATE.EL == EL3 then if !EL2Enabled() then UNDEFINED; elsif ELIsInHost(EL2) then if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL2) then return; else AArch64.TLBI_RVA(SecurityStateAtEL(EL2), Regime_EL20, VMID_NONE, Shareability_OSH, TLBILevel_Last, TLBI_AllAttr, X[t, 64]); else if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL2) then return; else AArch64.TLBI_RVA(SecurityStateAtEL(EL2), Regime_EL2, VMID[], Shareability_OSH, TLBILevel_Last, TLBI_AllAttr, X[t, 64]);

TLBI RVALE2OSNXS{, <Xt>}

op0op1CRnCRmop2
0b010b1000b10010b01010b101

if !IsFeatureImplemented(FEAT_XS) then UNDEFINED; elsif PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() IN {'xx1'} then AArch64.SystemAccessTrap(EL2, 0x18); else UNDEFINED; elsif PSTATE.EL == EL2 then if ELIsInHost(EL2) then AArch64.TLBI_RVA(SecurityStateAtEL(EL2), Regime_EL20, VMID_NONE, Shareability_OSH, TLBILevel_Last, TLBI_ExcludeXS, X[t, 64]); else AArch64.TLBI_RVA(SecurityStateAtEL(EL2), Regime_EL2, VMID[], Shareability_OSH, TLBILevel_Last, TLBI_ExcludeXS, X[t, 64]); elsif PSTATE.EL == EL3 then if !EL2Enabled() then UNDEFINED; elsif ELIsInHost(EL2) then if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL2) then return; else AArch64.TLBI_RVA(SecurityStateAtEL(EL2), Regime_EL20, VMID_NONE, Shareability_OSH, TLBILevel_Last, TLBI_ExcludeXS, X[t, 64]); else if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL2) then return; else AArch64.TLBI_RVA(SecurityStateAtEL(EL2), Regime_EL2, VMID[], Shareability_OSH, TLBILevel_Last, TLBI_ExcludeXS, X[t, 64]);


26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6

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