esb

Error Synchronization Barrier

ESB

Synchronizes unrecoverable system errors.

Pseudocode Operation

SynchronizeErrors()

Encoding

Binary Layout

11010101000000110010

31:12

0010

11:8

000

7:5

11111

4:0

Format System Alias

Opcode 0xD503221F

Extension RAS (Reliability)

Operands

Other forms of esb

esb Error Synchronization Barrier (A32)

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD503221F	ESB		A64		11010101000000110010 \| 0010 \| 000 \| 11111

Description

Error Synchronization Barrier is an error synchronization event that might also update DISR_EL1 and VDISR_EL2. This instruction can be used at all Exception levels and in Debug state. In Debug state, this instruction behaves as if SError interrupts are masked at all Exception levels. See Error Synchronization Barrier in the Arm(R) Reliability, Availability, and Serviceability (RAS) Specification, Armv8, for Armv8-A architecture profile. If the RAS Extension is not implemented, this instruction executes as a NOP.

Operation

if IsFeatureImplemented(FEAT_TME) && TSTATE.depth > 0 then
    FailTransaction(TMFailure_ERR, FALSE);
SynchronizeErrors();
AArch64.ESBOperation();
if PSTATE.EL IN {EL0, EL1} && EL2Enabled() then AArch64.vESBOperation();
TakeUnmaskedSErrorInterrupts();

esb