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GITS_MPIDR, Report ITS's affinity.

The GITS_MPIDR characteristics are:


Reports ITS's affinity when the vPE Table is shared with Redistributors.


This register is present only when FEAT_GICv4p1 is implemented. Otherwise, direct accesses to GITS_MPIDR are RES0.

A copy of this register is provided for each ITS.

When GITS_TYPER.SVPET==0, this register is RES0.


GITS_MPIDR is a 32-bit register.

Field descriptions

The GITS_MPIDR bit assignments are:


Aff3, bits [31:24]

The Affinity level 3 value for the ITS.

Aff2, bits [23:16]

The Affinity level 2 value for the ITS.

Aff1, bits [15:8]

The Affinity level 1 value for the ITS.

Bits [7:0]

Reserved, RES0.

Accessing the GITS_MPIDR

GITS_MPIDR can be accessed through the memory-mapped interfaces:

GIC ITS control0x0018

This interface is accessible as follows:

  • When GICD_CTLR.DS == 0 accesses to this register are RO.
  • When an access is Secure accesses to this register are RO.
  • When an access is Non-secure accesses to this register are RO.