ERRDEVAFF

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:

Depending on the IMPLEMENTATION DEFINED nature of the system, it might be possible that ERRDEVAFF is read before system firmware has configured the group of error records or the PE or group of PEs that the group of error records has affinity with. When this is the case, ERRDEVAFF reads as zero.

If RAS System Architecture v1.1 is not implemented then 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 and an implementation implements ERRDEVAFF. Otherwise, direct accesses to ERRDEVAFF are RES0.

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

Attributes

Field descriptions

Bits [63:40]

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.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

F0V, bit [31]

Indicates that the ERRDEVAFF.Aff0 field is valid.

The value of this field is an IMPLEMENTATION DEFINED choice of:

F0V	Meaning
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.

Access to this field is RO.

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

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

Otherwise:

Bits [29:25]

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

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

Otherwise:

Aff2, bits [23:16]
When !IsZero(ERRDEVAFF.[Aff1,Aff0,F0V]):

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

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Otherwise:

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

The value of this field is an IMPLEMENTATION DEFINED choice of:

Aff2	Meaning
0bxxxxxxx1	PE affinity is the subset of level 2 where ERRDEVAFF.Aff2[7:1] is the value of MPIDR_EL1.Aff2[7:1], viewed from the highest Exception level of the associated PEs.
0bxxxxxx10	PE affinity is the subset of level 2 where ERRDEVAFF.Aff2[7:2] is the value of MPIDR_EL1.Aff2[7:2], viewed from the highest Exception level of the associated PEs.
0bxxxxx100	PE affinity is the subset of level 2 where ERRDEVAFF.Aff2[7:3] is the value of MPIDR_EL1.Aff2[7:3], viewed from the highest Exception level of the associated PEs.
0bxxxx1000	PE affinity is the subset of level 2 where ERRDEVAFF.Aff2[7:4] is the value of MPIDR_EL1.Aff2[7:4], viewed from the highest Exception level of the associated PEs.
0bxxx10000	PE affinity is the subset of level 2 where ERRDEVAFF.Aff2[7:5] is the value of MPIDR_EL1.Aff2[7:5], viewed from the highest Exception level of the associated PEs.
0bxx100000	PE affinity is the subset of level 2 where ERRDEVAFF.Aff2[7:6] is the value of MPIDR_EL1.Aff2[7:6], viewed from the highest Exception level of the associated PEs.
0bx1000000	PE affinity is the subset of level 2 where ERRDEVAFF.Aff2[7] is the value of MPIDR_EL1.Aff2[7], viewed from the highest Exception level of the associated PEs.
0x80	PE affinity is at level 3.

Access to this field is RO.

Aff1, bits [15:8]
When !IsZero(ERRDEVAFF.[Aff0,F0V]):

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

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Otherwise:

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

The value of this field is an IMPLEMENTATION DEFINED choice of:

Aff1	Meaning
0bxxxxxxx1	PE affinity is the subset of level 1 where ERRDEVAFF.Aff1[7:1] is the value of MPIDR_EL1.Aff1[7:1], viewed from the highest Exception level of the associated PEs.
0bxxxxxx10	PE affinity is the subset of level 1 where ERRDEVAFF.Aff1[7:2] is the value of MPIDR_EL1.Aff1[7:2], viewed from the highest Exception level of the associated PEs.
0bxxxxx100	PE affinity is the subset of level 1 where ERRDEVAFF.Aff1[7:3] is the value of MPIDR_EL1.Aff1[7:3], viewed from the highest Exception level of the associated PEs.
0bxxxx1000	PE affinity is the subset of level 1 where ERRDEVAFF.Aff1[7:4] is the value of MPIDR_EL1.Aff1[7:4], viewed from the highest Exception level of the associated PEs.
0bxxx10000	PE affinity is the subset of level 1 where ERRDEVAFF.Aff1[7:5] is the value of MPIDR_EL1.Aff1[7:5], viewed from the highest Exception level of the associated PEs.
0bxx100000	PE affinity is the subset of level 1 where ERRDEVAFF.Aff1[7:6] is the value of MPIDR_EL1.Aff1[7:6], viewed from the highest Exception level of the associated PEs.
0bx1000000	PE affinity is the subset of level 1 where ERRDEVAFF.Aff1[7] is the value of MPIDR_EL1.Aff1[7], viewed from the highest Exception level of the associated PEs.
0x80	PE affinity is at level 2.
0x00	PE affinity is above level 2 or a subset of level 2.

Access to this field is RO.

Aff0, bits [7:0]
When ERRDEVAFF.F0V == 1:

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

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Otherwise:

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

The value of this field is an IMPLEMENTATION DEFINED choice of:

Aff0	Meaning
0bxxxxxxx1	PE affinity is the subset of level 0 where ERRDEVAFF.Aff0[7:1] is the value of MPIDR_EL1.Aff0[7:1], viewed from the highest Exception level of the associated PEs.
0bxxxxxx10	PE affinity is the subset of level 0 where ERRDEVAFF.Aff0[7:2] is the value of MPIDR_EL1.Aff0[7:2], viewed from the highest Exception level of the associated PEs.
0bxxxxx100	PE affinity is the subset of level 0 where ERRDEVAFF.Aff0[7:3] is the value of MPIDR_EL1.Aff0[7:3], viewed from the highest Exception level of the associated PEs.
0bxxxx1000	PE affinity is the subset of level 0 where ERRDEVAFF.Aff0[7:4] is the value of MPIDR_EL1.Aff0[7:4], viewed from the highest Exception level of the associated PEs.
0bxxx10000	PE affinity is the subset of level 0 where ERRDEVAFF.Aff0[7:5] is the value of MPIDR_EL1.Aff0[7:5], viewed from the highest Exception level of the associated PEs.
0bxx100000	PE affinity is the subset of level 0 where ERRDEVAFF.Aff0[7:6] is the value of MPIDR_EL1.Aff0[7:6], viewed from the highest Exception level of the associated PEs.
0bx1000000	PE affinity is the subset of level 0 where ERRDEVAFF.Aff0[7] is the value of MPIDR_EL1.Aff0[7], viewed from the highest Exception level of the associated PEs.
0x80	PE affinity is at level 1.
0x00	PE affinity is above level 1 or a subset of level 1.

Access to this field is RO.

Accessing ERRDEVAFF

This section shows the offset of ERRDEVAFF when FEAT_RASSA_4KB_GRP is implemented. If FEAT_RASSA_16KB_GRP or FEAT_RASSA_64KB_GRP is implemented, see 'RAS memory-mapped register views' for the offset of ERRDEVAFF.

ERRDEVAFF can be accessed through the memory-mapped interfaces:

63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48	47	46	45	44	43	42	41	40	39	38	37	36	35	34	33	32
31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
RES0																								Aff3
F0V	U	RES0					MT	Aff2								Aff1								Aff0

ERRDEVAFF, Device Affinity Register

Purpose

Configuration

Attributes

Field descriptions

Bits [63:40]

Aff3, bits [39:32]

F0V, bit [31]

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

Otherwise:

Bits [29:25]

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

Otherwise:

Aff2, bits [23:16]
When !IsZero(ERRDEVAFF.[Aff1,Aff0,F0V]):

Otherwise:

Aff1, bits [15:8]
When !IsZero(ERRDEVAFF.[Aff0,F0V]):

Otherwise:

Aff0, bits [7:0]
When ERRDEVAFF.F0V == 1:

Otherwise:

Accessing ERRDEVAFF

ERRDEVAFF can be accessed through the memory-mapped interfaces:

ERRDEVAFF, Device Affinity Register

Purpose

Configuration

Attributes

Field descriptions

Bits [63:40]

Aff3, bits [39:32]

F0V, bit [31]

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

Otherwise:

Bits [29:25]

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

Otherwise:

Aff2, bits [23:16]When !IsZero(ERRDEVAFF.[Aff1,Aff0,F0V]):

Otherwise:

Aff1, bits [15:8]When !IsZero(ERRDEVAFF.[Aff0,F0V]):

Otherwise:

Aff0, bits [7:0]When ERRDEVAFF.F0V == 1:

Otherwise:

Accessing ERRDEVAFF

ERRDEVAFF can be accessed through the memory-mapped interfaces:

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

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

Aff2, bits [23:16]
When !IsZero(ERRDEVAFF.[Aff1,Aff0,F0V]):

Aff1, bits [15:8]
When !IsZero(ERRDEVAFF.[Aff0,F0V]):

Aff0, bits [7:0]
When ERRDEVAFF.F0V == 1: