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s390/zcrypt: New config switch CONFIG_ZCRYPT_DEBUG

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Introduce a new config switch CONFIG_ZCRYPT_DEBUG which
will be used to enable some features for debugging the
zcrypt device driver and ap bus system:

Another patch will use this for displaying ap card and
ap queue state information via sysfs attribute.

A furher patch will use this to enable some special
treatment for some fields of an crypto request to be able
to inject failures and so help debugging with regards
to handling of failures.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Harald Freudenberger 2020-09-23 09:18:38 +02:00 committed by Vasily Gorbik
parent 91ffc519c1
commit 0ae88ccf4c
1 changed files with 20 additions and 4 deletions
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24
drivers/crypto/Kconfig
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@ -71,10 +71,26 @@ config ZCRYPT
help
Select this option if you want to enable support for
s390 cryptographic adapters like:
+ PCI-X Cryptographic Coprocessor (PCIXCC)
+ Crypto Express 2,3,4 or 5 Coprocessor (CEXxC)
+ Crypto Express 2,3,4 or 5 Accelerator (CEXxA)
+ Crypto Express 4 or 5 EP11 Coprocessor (CEXxP)
+ Crypto Express 2 up to 7 Coprocessor (CEXxC)
+ Crypto Express 2 up to 7 Accelerator (CEXxA)
+ Crypto Express 4 up to 7 EP11 Coprocessor (CEXxP)
config ZCRYPT_DEBUG
bool "Enable debug features for s390 cryptographic adapters"
default n
depends on DEBUG_KERNEL
depends on ZCRYPT
help
Say 'Y' here to enable some additional debug features on the
s390 cryptographic adapters driver.
There will be some more sysfs attributes displayed for ap cards
and queues and some flags on crypto requests are interpreted as
debugging messages to force error injection.
Do not enable on production level kernel build.
If unsure, say N.
config ZCRYPT_MULTIDEVNODES
bool "Support for multiple zcrypt device nodes"