CurrentEL

32-bitIdentification

Reports which exception level the processor is currently running at. Read-only, and the standard way for runtime code to discover the privilege it is running under.

Field layout

—

3:2

byte 3

byte 2

byte 1

byte 0

Current value hover a field to locate it

Fields

Bits	Field	Bits	Description
31:4	—	28	Not assigned to a documented field. Values written here are reserved and should be treated as read-as-zero unless the architecture says otherwise.
3:2	EL[3:2]	2	The current exception level. Note the field sits at bits 3:2 rather than 1:0, with the low two bits reserved. 0 EL0, the lowest, least privileged level 1 EL1, typically the operating system kernel 2 EL2, the hypervisor, when implemented 3 EL3, the highest, most privileged level
1:0	—	2	Not assigned to a documented field. Values written here are reserved and should be treated as read-as-zero unless the architecture says otherwise.

Bits

Field

Bits

Value

Description

31:4

—

Not assigned to a documented field. Values written here are reserved and should be treated as read-as-zero unless the architecture says otherwise.

3:2

EL[3:2]

The current exception level. Note the field sits at bits 3:2 rather than 1:0, with the low two bits reserved.

0: EL0, the lowest, least privileged level
1: EL1, typically the operating system kernel
2: EL2, the hypervisor, when implemented
3: EL3, the highest, most privileged level

1:0

—

Not assigned to a documented field. Values written here are reserved and should be treated as read-as-zero unless the architecture says otherwise.

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