B2.103 Virtualization Multiprocessor ID Register, EL2
The VMPIDR_EL2 characteristics are:
Purpose
Provides the value of the Virtualization Multiprocessor ID. This is the value returned by Non-
secure EL1 reads of MPIDR.
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
VMPIDR_EL2[31:0] is architecturally mapped to AArch32 register VMPIDR. See
B1.120 Virtualization Multiprocessor ID Register on page B1-355.
Attributes
VMPIDR_EL2 is a 64-bit register.
VMPIDR_EL2 resets to the value of MPIDR_EL2.
VMPIDR
63
0
Figure B2-74 VMPIDR_EL2 bit assignments
VMPIDR, [63:0]
MPIDR value returned by Non-secure EL1 reads of the MPIDR_EL1. The MPIDR description
defines the subdivision of this value. See Figure B2-54 MPIDR_EL1 bit assignments
on page B2-512.
To access the VMPIDR_EL2:
MRS <Xt>, VMPIDR_EL2 ; Read VMPIDR_EL2 into Xt
MSR VMPIDR_EL2, <Xt> ; Write Xt to VMPIDR_EL2
Register access is encoded as follows:
Table B2-96 VMPIDR_EL2 access encoding
op0 op1 CRn CRm op2
11 100 0000 0000 101
B2 AArch64 system registers
B2.103 Virtualization Multiprocessor ID Register, EL2
100236_0100_00_en Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
B2-554
Non-Confidential
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