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TLBI ALLE2, TLB Invalidate All, EL2

The TLBI ALLE2 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 1 translation table entry, from any level of the translation table walk.

  • If SCR_EL3.NS is 1 and the entry would be required to translate an address using the Non-secure EL2 or Non-secure EL2&0 translation regime.

  • If SCR_EL3.NS is 0 and the entry would be required to translate an address using the Secure EL2 or Secure EL2&0 translation regime.

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

Configuration

There are no configuration notes.

Attributes

TLBI ALLE2 is a 64-bit System instruction.

Field descriptions

This instruction has no applicable fields.

The value in the register specified by <Xt> is ignored.

Executing the TLBI ALLE2 instruction

When executing this instruction Xt should be encoded as 0b11111. If the Xt field is not set to 0b11111, it is CONSTRAINED UNPREDICTABLE whether:

  • The instruction is UNDEFINED.

  • The instruction behaves as if the Xt field is set to 0b11111.

Accesses to this instruction use the following encodings:

TLBI ALLE2{, <Xt>}

op0op1CRnCRmop2
0b010b1000b10000b01110b000
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_ALLE2();
elsif PSTATE.EL == EL3 then
    if !EL2Enabled() then
        UNDEFINED;
    else
        TLBI_ALLE2();