Before you begin
A cryptographic device must be configured for the LPAR
before you can set the device or any associated AP queues online in Linux®, see Setting the LPAR configuration status.
Procedure
-
Preferably, use the chzcrypt command with the -e option to set cryptographic devices and AP queues online, or use the -d option to set them offline.
For example:
- To set cryptographic devices (in decimal notation) 0, 1, 4, 5, and 12 online issue:
# chzcrypt -e 0 1 4 5 12
- To set all available cryptographic devices offline issue:
# chzcrypt -d -a
- Alternatively, write
1 to the online sysfs
attribute of a cryptographic device to set the device online, or write 0 to set the
device offline. For example:
- To set a cryptographic device with device ID 0x3e online issue:
# echo 1 > /sys/bus/ap/devices/card3e/online
- To set a cryptographic device with device ID 0x3e offline issue:
# echo 0 > /sys/bus/ap/devices/card3e/online
- To check the online status of the cryptographic device with device ID
0x3e issue:
# cat /sys/bus/ap/devices/card3e/online
The value is 1
if the device is online or 0 otherwise.
