63:12

0h

RO

Reserved

11

1h

RO/V

Crypto XTS Support (CRYPTOXTSSUPP)

0: Encryption and Decryption are not supported with the XTS algorithm.
1: Encryption and Decryption are supported with the XTS algorithm.
Typically, the OPCAP bit for ENCRYPT and DECRYPT would be cleared if no crypto algorithm was supported.

10

1h

RO/V

Crypto CFB Support (CRYPTOCFBSUPP)

0: Encryption and Decryption are not supported with the CFB algorithm
1: Encryption and Decryption are supported with the CFB algorithm.
Typically, the OPCAP bit for ENCRYPT and DECRYPT would be cleared if no crypto algorithm was supported.

9

1h

RO/V

Crypto GCM Support (CRYPTOGCMSUPP)

0: Encryption and Decryption are not supported with the GCM algorithm
1: Encryption and Decryption are supported with the GCM algorithm.
Typically, the OPCAP bit for ENCRYPT and DECRYPT would be cleared if no crypto algorithm was supported.

8

1h

RO/V

Header Generation Support (HEADERGENSUPP)

0: Compression Header Generation is not supported.
1: Compression Header Generation (see #341204 Section 3.4.5) is supported.
This value should be ignored if the COMPRESS opcode is not supported.

7

1h

RO/V

Dictionary Compression Support (DICTIONARYCMPSUPP)

0: Compression with a dictionary is not supported.
1: Compression with a dictionary (see #341204 Section 3.4.4) is supported.
This value should be ignored if the COMPRESS opcode is not supported.

6

0h

RO

Reserved

5

1h

RO/V

Compression Early Abort Support (CMPEARLYABORTSUPP)

0: Compression Early Abort is not supported.
1: Compression Early Abort (see #341204 Section 3.4.6) is supported.
This value should be ignored if the COMPRESS opcode is not supported.

4

1h

RO/V

Load Partial AECS Support (LOADPARTIALAECSSUPP)

0: If the Decompress Flag bit 13 (Load Partial) is set, then the descriptor will return an error.
1: Decompress Flag bit 13 (Load Partial) can be used.

3

1h

RO/V

Force Array Output Modification Support (FORCEARRAYOUTPUTMODSUPP)

0: If the Filter Flag bit 27 (Force Array Output Modification) is set, then the descriptor will return an error.
1: Filter Flag bit 27 (Force Array Output Modification) can be used.

2

1h

RO/V

Chaining to CRC64/Zero Compress Functions (CHAININGCRC64ZCMPFUNC)

0: Operation CRC64 cannot be preceded by any other operation.
1: This operation can be preceded by some combination of Decrypt and Decompress. See #341204 Section 3.1.

1

1h

RO/V

Drop Initial Bits Support (DROPINITIALBITSSUPP)

0: If the Drop Initial Bits field in the AECS is non-zero, the descriptor will return an error.
1: A non-zero value of the Drop Initial Bits field is allowed.See #341204 Section 6.4.1.

0

1h

RO/V

Generation 2 Minimum Capabilities (DCMPAECSFORMATVER)

0: Minimum Generation 2 features are not present, in particular:
• The decompress internal state in the AECS is Format 1. Inparticular, the Literal/Length Mapping is represented by a table.
• Completion Record checksum fields are written as 0 for CRC64.
• CRC Select is reserved for the CRC64 opcode.
• If the operation is other than No-op or Drain, at least one ofSource 1 Transfer Size and Maximum Destination Size must benon-zero.
• Ignore End Bits Extension is not supported.
• Last Descriptor bit in the compression AECS is not present.

1: Minimum Generation 2 features are present, in particular:
• The decompress internal state in the AECS is Format 2. In particular, theLiteral/Length Mapping is represented by a CAM. (See #341204 Section 6.4.1.1)
• Completion Record checksum fields are written correctly for CRC64.
• CRC Select can be used with the CRC64 opcode.
• If the operation is other than No-op or Drain, at least one of Source 1Transfer Size, Source 2 Transfer Size, and Maximum Destination Sizemust be non-zero.
• Ignore End Bits Extension is supported.
• Last Descriptor bit in the compression AECS is present. (See #341204 Section 3.4.7)