TLBI IPAS2LE1, TLB Invalidate by Intermediate Physical Address, Stage 2, Last level, EL1

The TLBI IPAS2LE1 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:

• The entry is a stage 2 only translation table entry, from the final level of the translation table walk.

• One of the following applies:

  • SCR_EL3.NS==1 and the entry would be required to translate the specified IPA using the Non-secure EL1&0 translation regime.

  • SCR_EL3.NS==0 and the entry would be required to translate the specified IPA using the Secure EL1&0 translation regime.

• The entry would be used with the current VMID.

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

The invalidation applies to the PE that executes this System instruction.

For more information about the architectural requirements for this System instruction see 'Invalidation of TLB entries from stage 2 translations' in the Arm® Architecture Reference Manual, Armv8, for Armv8-A architecture profile.

Configuration

There are no configuration notes.

Attributes

TLBI IPAS2LE1 is a 64-bit System instruction.

Field descriptions

The TLBI IPAS2LE1 input value bit assignments are:

NS, bit [63]

When ARMv8.4-SecEL2 is implemented:

Not Secure. Specifies the 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 ARMv8.4-SecEL2 is not implemented or is disabled in the current Security state, this field is RES0.

Otherwise:

Reserved, RES0.

Bits [62:48]

Reserved, RES0.

TTL, bits [47:44]

When ARMv8.4-TTL is implemented:

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

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:

Reserved, RES0.

Bits [43:40]

Reserved, RES0.

IPA[51:48], bits [39:36]

When ARMv8.2-LPA is implemented:

Extension to IPA[47:12]. See IPA[47:12] for more details.

Otherwise:

Reserved, RES0.

IPA[47:12], bits [35:0]

Bits[47:12] of the intermediate physical address to match. For implementations with fewer than 48 bits, the upper bits of this field are RES0.

When ARMv8.2-LPA is implemented, and 52-bit addresses and a 64KB translation granule are in use, IPA[51:48] form the upper part of the address value. Otherwise, IPA[51:48] are RES0.

if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && HCR_EL2.NV == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    else
        UNDEFINED;
elsif PSTATE.EL == EL2 then
    TLBI_IPAS2LE1(X[t]);
elsif PSTATE.EL == EL3 then
    if !EL2Enabled() then
        //no operation
    else
        TLBI_IPAS2LE1(X[t]);