BPIMVA, Branch Predictor Invalidate by VA

The BPIMVA characteristics are:

Purpose

Invalidate virtual address from branch predictors.

Configuration

This instruction is present only when EL1 is capable of using AArch32. Otherwise, direct accesses to BPIMVA are UNDEFINED.

In an implementation where the branch predictors are architecturally invisible, this instruction can execute as a NOP.

Attributes

BPIMVA is a 32-bit System instruction.

Field descriptions

313029282726252423222120191817161514131211109876543210
Virtual address to use

Bits [31:0]

Virtual address to use.

Executing BPIMVA

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

MCR{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}

coprocopc1CRnCRmopc2
0b11110b0000b01110b01010b111

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T7 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T7 == '1' then AArch32.TakeHypTrapException(0x03); else BPIMVA(R[t]); elsif PSTATE.EL == EL2 then BPIMVA(R[t]); elsif PSTATE.EL == EL3 then BPIMVA(R[t]);


30/09/2022 15:58; 21c5a6dd0fdaf10a712e2f2d6fffbdbd66d4d96f

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