B1.120 Virtualization Multiprocessor ID Register
The VMPIDR 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
(NS)
EL0
(S)
EL1
(NS)
EL1
(S)
EL2
EL3
(SCR.NS = 1)
EL3
(SCR.NS = 0)
- - - - RW RW -
Configurations
VMPIDR is architecturally mapped to AArch64 register VMPIDR_EL2[31:0]. See
B2.103 Virtualization Multiprocessor ID Register, EL2 on page B2-554.
This register is accessible only at EL2 or EL3.
Attributes
VMPIDR is a 32-bit register.
VMPIDR resets to the value of MPIDR.
VMPIDR
31 0
Figure B1-68 VMPIDR bit assignments
VMPIDR, [31:0]
MPIDR value returned by Non-secure EL1 reads of the MPIDR. The MPIDR description
defines the subdivision of this value. See Figure B1-51 MPIDR bit assignments
on page B1-315.
To access the VMPIDR:
MRC p15,4,<Rt>,c0,c0,5 ; Read VMPIDR into Rt
MCR p15,4,<Rt>,c0,c0,5 ; Write Rt to VMPIDR
Register access is encoded as follows:
Table B1-99 VMPIDR access encoding
coproc opc1 CRn CRm opc2
1111 100 0000 0000 101
B1 AArch32 system registers
B1.120 Virtualization Multiprocessor ID Register
100236_0100_00_en Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
B1-355
Non-Confidential
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