B2.104 Virtualization Processor ID Register, EL2
The VPIDR_EL2 characteristics are:
Purpose
Holds the value of the Virtualization Processor ID. This is the value returned by Non-secure
EL1 reads of MIDR_EL1. See Figure B2-53 MIDR_EL1 bit assignments on page B2-510.
Usage constraints
This register is accessible as follows:
EL0 EL1
(NS)
EL1
(S)
EL2
EL3
(SCR.NS = 1)
EL3
(SCR.NS = 0)
- - - RW RW -
Configurations
VPIDR_EL2 is architecturally mapped to AArch32 register VPIDR. See B1.121 Virtualization
Processor ID Register on page B1-356.
Attributes
VPIDR_EL2 is a 32-bit register.
VPIDR_EL2 resets to the value of MIDR_EL1.
31
0
VPIDR
Figure B2-75 VPIDR_EL2 bit assignments
VPIDR, [31:0]
MIDR_EL1 value returned by Non-secure EL1 reads of the MIDR_EL1. The MIDR_EL1
description defines the subdivision of this value. See Figure B2-53 MIDR_EL1 bit assignments
on page B2-510.
To access the VPIDR_EL2:
MRS <Xt>, VPIDR_EL2 ; Read VPIDR_EL2 into Xt
MSR VPIDR_EL2, <Xt> ; Write Xt to VPIDR_EL2
Register access is encoded as follows:
Table B2-97 VPIDR_EL2 access encoding
op0 op1 CRn CRm op2
11 100 0000 0000 000
B2 AArch64 system registers
B2.104 Virtualization Processor ID Register, EL2
100236_0100_00_en Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
B2-555
Non-Confidential
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