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The VMPIDR provides the value of the Virtualization Multiprocessor ID. This is the value returned by Non-secure EL1 reads of MPIDR.
VMPIDR is architecturally mapped to AArch64 register VMPIDR_EL2[31:0].
This register is accessible only at EL2 or EL3.
This register resets to MPIDR value.
Bit fields and details not provided in this description are architecturally defined. See the Arm® Architecture Reference Manual Armv8, for Armv8-A architecture profile.