IBM 990 - Manual (Page 138)

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zSeries 990 Technical Guide
Figure 5-2 PCI Cryptographic Accelerator feature
Each PCICA feature has up to two cryptographic accelerator cards embedded in an adapter
package for installing in I/O slots of the z990 cage. The PCICA feature does not have ports
and does not use fiber optic or other cables. The PCICA cards can be shared by any logical
partition defined in the system up to 15 logical partitions per card, or 30 logical partitions per
feature.
The PCICA feature does not use CHPIDs, but is assigned two PCHIDs (one per accelerator
card).
5.3.3 Configuration rules
The following rules apply:
The z990 allows for up to two PCICA features per I/O cage. This allows for a maximum of
six PCICA features or twelve PCICA coprocessors per z990 server.
The maximum number of PCIXCC features (or cryptographic coprocessors) per I/O cage
is four; the maximum number of PCIXCC features per system is also four.
The total number of cryptographic features may not exceed eight per z990 for any
combination of PCIXCC and PCICA features.
In addition, any combination of PCIXCC, PCICA, OSA-Express, and FICON-Express
features may not exceed 16 features per I/O cage, or 48 features per z990 server.
Table 5-1 on page 127 summarizes support of partitions on z990 for PCICA and PCIXCC
features.
Note: While PCICA and PCIXCC features have no CHPID type and are not identified as
external spanned channels, all logical partitions in all LCSSs have access to the PCICA
feature (up to 15 logical partitions per cryptographic accelerator card). Even so, all logical
partitions in all LCSSs have access to the PCIXCC feature (up to 15 logical partitions per
feature).
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