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TLBI RVAE1IS, TLB Range Invalidate by VA, EL1, Inner Shareable

The TLBI RVAE1IS characteristics are:

Purpose

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 to translate the specified VA, and one of the following applies:
- The entry is from a level of lookup above the final level and matches the specified ASID.
- The entry is a global entry from the final level of lookup.
- The entry is a non-global entry from the final level of lookup that matches the specified ASID.
When EL2 is implemented and enabled in the Security state described by the current value of SCR_EL3.NS:
- If HCR_EL2.{E2H, TGE} is not {1, 1}, the entry would be used with the current VMID and would be required to translate the specified VA using the EL1&0 translation regime.
- If HCR_EL2.{E2H, TGE} is {1, 1}, the entry would be required to translate the specified VA using the EL2&0 translation regime.
When EL2 is not implemented or is disabled in the current Security state, the entry would be required to translate the specified VA using the EL1&0 translation regime.
The entry is within the address range determined by the formula [BaseADDR <= VA < BaseADDR + ((NUM +1)*2^(5*SCALE +1) * Translation_Granule_Size)].

The invalidation applies to all PEs in the same Inner Shareable shareability domain as the PE that executes this System instruction.

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:

A PE with SCR_EL3.EEL2==1 is not architecturally required to invalidate any entries in the Secure EL1&0 translation of a PE in the same required shareability domain with SCR_EL3.EEL2==0.
A PE with SCR_EL3.EEL2==0 is not architecturally required to invalidate any entries in the Secure EL1&0 translation of a PE in the same required shareability domain with SCR_EL3.EEL2==1.
A PE is architecturally required to invalidate all relevant entries in the Secure EL1&0 translation of a System MMU in the same required shareability domain with a VMID of 0.

The range of addresses invalidated is UNPREDICTABLE when:

For the 4K translation granule:
- If TTL==01 and BaseADDR[29:12] is not equal to 000000000000000000.
- If TTL==10 and BaseADDR[20:12] is not equal to 000000000.
For the 16K translation granule:
- If TTL==10 and BaseADDR[24:14] is not equal to 00000000000.
For the 64K translation granule:
- If TTL==01 and BaseADDR[41:16] is not equal to 00000000000000000000000000.
- If TTL==10 and BaseADDR[28:16] is not equal to 0000000000000.

Configuration

This instruction is present only when ARMv8.4-TLBI is implemented. Otherwise, direct accesses to TLBI RVAE1IS are UNDEFINED.

Attributes

TLBI RVAE1IS is a 64-bit System instruction.

Field descriptions

The TLBI RVAE1IS input value bit assignments are:

63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48	47	46	45	44	43	42	41	40	39	38	37	36	35	34	33	32
ASID																TG		SCALE		NUM					TTL		BaseADDR
BaseADDR
31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0

ASID, bits [63:48]

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, but only 8 bits are being used in the context being invalidated, the upper bits are RES0.

TG, bits [47:46]

Translation granule size.

TG	Meaning
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 entries in the range that match the level described by the TTL hint.

TTL	Meaning
0b00	The entries in the range can be using any level for the translation table entries.
0b01	When using a 4KB or 64KB translation granule, all entries to invalidate are Level 1 translation table entries. When using a 16KB translation granule, this value is reserved and hardware should treat this field as 0b00.
0b10	All entries to invalidate are Level 2 translation table entries.
0b11	All entries to invalidate are Level 3 translation table entries.

BaseADDR, bits [36:0]

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 the TLBI RVAE1IS instruction

Accesses to this instruction use the following encodings:

TLBI RVAE1IS{, <Xt>}

op0	op1	CRn	CRm	op2
0b01	0b000	0b1000	0b0010	0b001

if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TTLB == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TTLBIS == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    else
        TLBI_RVAE1IS(X[t]);
elsif PSTATE.EL == EL2 then
    TLBI_RVAE1IS(X[t]);
elsif PSTATE.EL == EL3 then
    TLBI_RVAE1IS(X[t]);

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