TLBI RIPAS2LE1OS, TLBI RIPAS2LE1OSNXS, TLB Range Invalidate by Intermediate Physical Address, Stage 2, Last level, EL1, Outer Shareable

The TLBI RIPAS2LE1OS, TLBI RIPAS2LE1OSNXS characteristics are:

Purpose

If 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:

Note

When a TLB maintenance instruction is generated to the Secure EL1&0 translation regime and is defined to pass a VMID argument, or would be defined to pass a VMID argument if SCR_EL3.EEL2==1, then:

The invalidation is not required to apply to caching structures that combine stage 1 and stage 2 translation table entries.

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:

For more information about the architectural requirements for this System instruction, see 'Invalidation of TLB entries from stage 2 translations'.

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 RIPAS2LE1OS, TLBI RIPAS2LE1OSNXS are UNDEFINED.

Attributes

TLBI RIPAS2LE1OS, TLBI RIPAS2LE1OSNXS is a 64-bit System instruction.

Field descriptions

6362616059585756555453525150494847464544434241403938373635343332
313029282726252423222120191817161514131211109876543210
NSRES0TGSCALENUMTTLBaseADDR
BaseADDR

NS, bit [63]
When FEAT_RME is implemented:

When the instruction is executed and SCR_EL3.{NSE, NS} == {0, 0}, NS selects the IPA space.

NSMeaning
0b0

IPA is in the Secure IPA space.

0b1

IPA is in the Non-secure IPA space.

When the instruction is executed and SCR_EL3.{NSE, NS} == {1, 1}, this field is RES0, and the instruction applies only to the Realm IPA space.

When the instruction is executed and SCR_EL3.{NSE, NS} == {0, 1}, this field is RES0, and the instruction applies only to the Non-secure IPA space.


When FEAT_SEL2 is implemented and FEAT_RME is not implemented:

Not Secure. Specifies the IPA space.

NSMeaning
0b0

IPA is in the Secure IPA space.

0b1

IPA is in the Non-secure IPA space.

When the instruction is executed in Non-secure state, this field is RES0, and the instruction applies only to the Non-secure IPA space.

When FEAT_SEL2 is not implemented, or if EL2 is disabled in the current Security state, this field is RES0.


Otherwise:

Reserved, RES0.

Bits [62:48]

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_EL1.DS == 1) or (FEAT_D128 is implemented and VTCR_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 RIPAS2LE1OS, TLBI RIPAS2LE1OSNXS

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

TLBI RIPAS2LE1OS{, <Xt>}

op0op1CRnCRmop2
0b010b1000b10000b01000b111

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 AArch64.TLBI_RIPAS2(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_OSH, TLBILevel_Last, TLBI_AllAttr, X[t, 64]); elsif PSTATE.EL == EL3 then if !EL2Enabled() then return; else if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL1) then return; else AArch64.TLBI_RIPAS2(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_OSH, TLBILevel_Last, TLBI_AllAttr, X[t, 64]);

TLBI RIPAS2LE1OSNXS{, <Xt>}

op0op1CRnCRmop2
0b010b1000b10010b01000b111

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 AArch64.TLBI_RIPAS2(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_OSH, TLBILevel_Last, TLBI_ExcludeXS, X[t, 64]); elsif PSTATE.EL == EL3 then if !EL2Enabled() then return; else if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL1) then return; else AArch64.TLBI_RIPAS2(SecurityStateAtEL(EL1), Regime_EL10, VMID[], Shareability_OSH, TLBILevel_Last, TLBI_ExcludeXS, X[t, 64]);


26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6

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