Cortex-A15 Technical Reference ManualRevision: r2p0
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4.3.26. Virtualization Multiprocessor ID Register

The VMPIDR characteristics are:

Purpose

Holds the value of the Virtualization Multiprocessor ID. A Non-secure read of the MPIDR from PL1 returns the value of this register.

Usage constraints

The VMPIDR is:

  • a read/write register

  • only accessible from Hyp mode or from Monitor mode when SCR.NS is 1.

Configurations

Available in all configurations.

Attributes

See the register summary in Table 4.2.

Figure 4.22 shows the VMPIDR bit assignments.

Figure 4.22. VMPIDR bit assignments

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Table 4.51 shows the VMPIDR bit assignments.

Table 4.51. VMPIDR bit assignments

BitsNameFunction
[31:0]VMPIDR

MPIDR value returned by Non-secure PL1 reads of the MPIDR. For information on the subdivision of this value, see Multiprocessor Affinity Register.


To access the VMPIDR, read or write the CP15 register with:

MRC p15, 4, <Rt>, c0, c0, 5; Read Virtualization Multiprocessor ID Register

MCR p15, 4, <Rt>, c0, c0, 5; Write Virtualization Multiprocessor ID Register
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