ERRDEVAFF, Device Affinity Register

The ERRDEVAFF characteristics are:

Purpose

For a group of error records that has affinity with a single PE or a group of PEs, ERRDEVAFF is a copy of MPIDR_EL1 or part of MPIDR_EL1:

For example, if the group of PEs is a subset of the PEs at affinity level 1 then all of the following are true:

If RAS System Architecture v1.1 is not implemented, ERRDEVAFF can only describe a group of error records that is affine with a single PE or all the PEs at an affinity level.

Configuration

This register is present only when the group of error records has affinity with a PE or cluster of PEs. Otherwise, direct accesses to ERRDEVAFF are RES0.

ERRDEVAFF is implemented only as part of a memory-mapped group of error records.

Attributes

ERRDEVAFF is a 64-bit register.

Field descriptions

6362616059585756555453525150494847464544434241403938373635343332
313029282726252423222120191817161514131211109876543210
RES0Aff3
F0VURES0MTAff2Aff1Aff0

Bits [63:40]

Reserved, RES0.

Aff3, bits [39:32]

PE affinity level 3. The MPIDR_EL1.Aff3 field, viewed from the highest Exception level of the associated PE or PEs.

F0V, bit [31]

Indicates that the ERRDEVAFF.Aff0 field is valid.

F0VMeaning
0b0

ERRDEVAFF.Aff0 is not valid, and the PE affinity is above level 0 or a subset of level 0.

0b1

ERRDEVAFF.Aff0 is valid, and the PE affinity is at level 0.

U, bit [30]
When ERRDEVAFF.F0V == 1:

Uniprocessor. The MPIDR_EL1.U field, viewed from the highest Exception level of the associated PE.


Otherwise:

Reserved, UNKNOWN.

Bits [29:25]

Reserved, RES0.

MT, bit [24]
When ERRDEVAFF.F0V == 1:

Multithreaded. The MPIDR_EL1.MT field, viewed from the highest Exception level of the associated PE.


Otherwise:

Reserved, UNKNOWN.

Aff2, bits [23:16]
When affine with a PE or PEs at affinity level 2 or below:

PE affinity level 2. The MPIDR_EL1.Aff2 field, viewed from the highest Exception level of the associated PE or PEs.


When affine with a sub-set of PEs at affinity level 2:

PE affinity level 2. Defines part of the MPIDR_EL1.Aff2 field, viewed from the highest Exception level of the associated PEs.

Aff2Meaning
0bxxxxxxx1

ERRDEVAFF.Aff2[7:1] is the value of MPIDR_EL1.Aff2[7:1], viewed from the highest Exception level of the associated PEs.

0bxxxxxx10

ERRDEVAFF.Aff2[7:2] is the value of MPIDR_EL1.Aff2[7:2], viewed from the highest Exception level of the associated PEs.

0bxxxxx100

ERRDEVAFF.Aff2[7:3] is the value of MPIDR_EL1.Aff2[7:3], viewed from the highest Exception level of the associated PEs.

0bxxxx1000

ERRDEVAFF.Aff2[7:4] is the value of MPIDR_EL1.Aff2[7:4], viewed from the highest Exception level of the associated PEs.

0bxxx10000

ERRDEVAFF.Aff2[7:5] is the value of MPIDR_EL1.Aff2[7:5], viewed from the highest Exception level of the associated PEs.

0bxx100000

ERRDEVAFF.Aff2[7:6] is the value of MPIDR_EL1.Aff2[7:6], viewed from the highest Exception level of the associated PEs.

0bx1000000

ERRDEVAFF.Aff2[7] is the value of MPIDR_EL1.Aff2[7], viewed from the highest Exception level of the associated PEs.


Otherwise:

PE affinity level 2. Indicates whether the PE affinity is at level 3.

Aff2Meaning
0x80

PE affinity is at level 3.

All other values are reserved.

Aff1, bits [15:8]
When affine with a PE or PEs at affinity level 1 or below:

PE affinity level 1. The MPIDR_EL1.Aff1 field, viewed from the highest Exception level of the associated PE or PEs.


When affine with a sub-set of PEs at affinity level 1:

PE affinity level 1. Defines part of the MPIDR_EL1.Aff1 field, viewed from the highest Exception level of the associated PEs.

Aff1Meaning
0bxxxxxxx1

ERRDEVAFF.Aff1[7:1] is the value of MPIDR_EL1.Aff1[7:1], viewed from the highest Exception level of the associated PEs.

0bxxxxxx10

ERRDEVAFF.Aff1[7:2] is the value of MPIDR_EL1.Aff1[7:2], viewed from the highest Exception level of the associated PEs.

0bxxxxx100

ERRDEVAFF.Aff1[7:3] is the value of MPIDR_EL1.Aff1[7:3], viewed from the highest Exception level of the associated PEs.

0bxxxx1000

ERRDEVAFF.Aff1[7:4] is the value of MPIDR_EL1.Aff1[7:4], viewed from the highest Exception level of the associated PEs.

0bxxx10000

ERRDEVAFF.Aff1[7:5] is the value of MPIDR_EL1.Aff1[7:5], viewed from the highest Exception level of the associated PEs.

0bxx100000

ERRDEVAFF.Aff1[7:6] is the value of MPIDR_EL1.Aff1[7:6], viewed from the highest Exception level of the associated PEs.

0bx1000000

ERRDEVAFF.Aff1[7] is the value of MPIDR_EL1.Aff1[7], viewed from the highest Exception level of the associated PEs.


Otherwise:

PE affinity level 1. Indicates whether the PE affinity is at level 2.

Aff1Meaning
0x00

PE affinity is above level 2 or a subset of level 2.

0x80

PE affinity is at level 2.

Aff0, bits [7:0]
When affine with a PE at affinity level 0:

PE affinity level 0. The MPIDR_EL1.Aff0 field, viewed from the highest Exception level of the associated PE.


When affine with a sub-set of PEs at affinity level 0:

PE affinity level 0. Defines part of the MPIDR_EL1.Aff0 field, viewed from the highest Exception level of the associated PEs.

Aff0Meaning
0bxxxxxxx1

ERRDEVAFF.Aff0[7:1] is the value of MPIDR_EL1.Aff0[7:1], viewed from the highest Exception level of the associated PEs.

0bxxxxxx10

ERRDEVAFF.Aff0[7:2] is the value of MPIDR_EL1.Aff0[7:2], viewed from the highest Exception level of the associated PEs.

0bxxxxx100

ERRDEVAFF.Aff0[7:3] is the value of MPIDR_EL1.Aff0[7:3], viewed from the highest Exception level of the associated PEs.

0bxxxx1000

ERRDEVAFF.Aff0[7:4] is the value of MPIDR_EL1.Aff0[7:4], viewed from the highest Exception level of the associated PEs.

0bxxx10000

ERRDEVAFF.Aff0[7:5] is the value of MPIDR_EL1.Aff0[7:5], viewed from the highest Exception level of the associated PEs.

0bxx100000

ERRDEVAFF.Aff0[7:6] is the value of MPIDR_EL1.Aff0[7:6], viewed from the highest Exception level of the associated PEs.

0bx1000000

ERRDEVAFF.Aff0[7] is the value of MPIDR_EL1.Aff0[7], viewed from the highest Exception level of the associated PEs.


Otherwise:

PE affinity level 0. Indicates whether the PE affinity is at level 1.

Aff0Meaning
0x00

PE affinity is above level 1 or a subset of level 1.

0x80

PE affinity is at level 1.

Accessing ERRDEVAFF

ERRDEVAFF can be accessed through the memory-mapped interfaces:

ComponentOffsetInstance
RAS0xFA8ERRDEVAFF

Accesses to this interface are RO.


30/09/2022 15:58; 21c5a6dd0fdaf10a712e2f2d6fffbdbd66d4d96f

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