sev

Send Event

SEV

Sends an event to all processors in the cluster (wakes up WFE).

Pseudocode Operation

# Broadcast event to all cores in cluster
BROADCAST_EVENT_TO_ALL_CORES
PC ← PC + 4

Encoding

Binary Layout

11010101000000110010

31:12

0000

11:8

100

7:5

11111

4:0

Format System Alias

Opcode 0xD503209F

Extension Base

Operands

Other forms of sev

sev Send Event (A32)
sev Send Event (Thumb)

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD503209F	SEV		A64		11010101000000110010 \| 0000 \| 100 \| 11111

Description

Send Event is a hint instruction. It causes an event to be signaled to all PEs in the multiprocessor system. For more information, see Wait for Event mechanism and Send event.

Operation

SendEvent();

sev