TLBI VALE3, TLBI VALE3NXS

If EL3 is implemented, invalidates cached copies of translation table entries from TLBs that meet all the following requirements:

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

Attributes

Field descriptions

Bits [63:48]

TTL, bits [47:44]
When FEAT_TTL is implemented:

Translation Table Level. Indicates the level of the translation table walk that holds the leaf entry for the address being invalidated.

TTL	Meaning
0b00xx	No information supplied as to the translation table level. Hardware must assume that the entry can be from any level. In this case, TTL<1:0> is RES0.
0b01xx	The entry comes from a 4KB translation granule. The level of walk for the leaf level 0bxx is encoded as: 0b00 : If FEAT_LPA2 is implemented, level 0. Otherwise, treat as if TTL<3:2> is 0b00. 0b01 : Level 1. 0b10 : Level 2. 0b11 : Level 3.
0b10xx	The entry comes from a 16KB translation granule. The level of walk for the leaf level 0bxx is encoded as: 0b00 : Reserved. Treat as if TTL<3:2> is 0b00. 0b01 : If FEAT_LPA2 is implemented, level 1. Otherwise, treat as if TTL<3:2> is 0b00. 0b10 : Level 2. 0b11 : Level 3.
0b11xx	The entry comes from a 64KB translation granule. The level of walk for the leaf level 0bxx is encoded as: 0b00 : Reserved. Treat as if TTL<3:2> is 0b00. 0b01 : Level 1. 0b10 : Level 2. 0b11 : Level 3.

If an incorrect value of the TTL field is specified for the entry being invalidated by the instruction, then no entries are required by the architecture to be invalidated from the TLB.

Otherwise:

VA[55:12], bits [43:0]

Bits[55:12] of the virtual address to match. Any appropriate TLB entries that match the ASID value (if appropriate) and VA will be affected by this System instruction.

If the TLB maintenance instructions are targeting a translation regime that is using AArch32, and so has a VA of only 32 bits, then the software must treat bits[55:32] as RES0.

The treatment of the low-order bits of this field depends on the translation granule size, as follows:

Where a 4KB translation granule is being used, all bits are valid and used for the invalidation.
Where a 16KB translation granule is being used, bits [1:0] of this field are RES0 and ignored when the instruction is executed, because VA[13:12] have no effect on the operation of the instruction.
Where a 64KB translation granule is being used, bits [3:0] of this field are RES0 and ignored when the instruction is executed, because VA[15:12] have no effect on the operation of the instruction.

Executing TLBI VALE3, TLBI VALE3NXS

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

TLBI VALE3{, <Xt>}

op0	op1	CRn	CRm	op2
0b01	0b110	0b1000	0b0111	0b101

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then UNDEFINED; elsif PSTATE.EL == EL2 then UNDEFINED; elsif PSTATE.EL == EL3 then if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL3) then return; else AArch64.TLBI_VA(SecurityStateAtEL(EL3), Regime_EL3, VMID_NONE, Shareability_NSH, TLBILevel_Last, TLBI_AllAttr, X[t, 64]);

TLBI VALE3NXS{, <Xt>}

op0	op1	CRn	CRm	op2
0b01	0b110	0b1001	0b0111	0b101

if !IsFeatureImplemented(FEAT_XS) then UNDEFINED; elsif PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then UNDEFINED; elsif PSTATE.EL == EL2 then UNDEFINED; elsif PSTATE.EL == EL3 then if IsFeatureImplemented(FEAT_RME) && !ValidSecurityStateAtEL(EL3) then return; else AArch64.TLBI_VA(SecurityStateAtEL(EL3), Regime_EL3, VMID_NONE, Shareability_NSH, TLBILevel_Last, TLBI_ExcludeXS, X[t, 64]);

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
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
RES0																TTL				VA[55:12]
VA[55:12]

TLBI VALE3, TLBI VALE3NXS, TLB Invalidate by VA, Last level, EL3

Purpose

Configuration

Attributes

Field descriptions

Bits [63:48]

TTL, bits [47:44]
When FEAT_TTL is implemented:

Otherwise:

VA[55:12], bits [43:0]

Executing TLBI VALE3, TLBI VALE3NXS

TLBI VALE3{, <Xt>}

TLBI VALE3NXS{, <Xt>}

TLBI VALE3, TLBI VALE3NXS, TLB Invalidate by VA, Last level, EL3

Purpose

Configuration

Attributes

Field descriptions

Bits [63:48]

TTL, bits [47:44]When FEAT_TTL is implemented:

Otherwise:

VA[55:12], bits [43:0]

Executing TLBI VALE3, TLBI VALE3NXS

TLBI VALE3{, <Xt>}

TLBI VALE3NXS{, <Xt>}

TTL, bits [47:44]
When FEAT_TTL is implemented: