[S390] Support for s390 Pseudo Random Number Generator
Starting with the z9 the CPU Cryptographic Assist Facility comes with
an integrated Pseudo Random Number Generator. The generator creates
random numbers by an algorithm similar to the ANSI X9.17 standard.
The pseudo-random numbers can be accessed via a character device driver
node called /dev/prandom. Similar to /dev/urandom any amount of bytes
can be read from the device without blocking.
Signed-off-by: Jan Glauber <jan.glauber@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index 12eb97f..dbe3df4 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -757,6 +757,7 @@
# CONFIG_CRYPTO_SHA256_S390 is not set
# CONFIG_CRYPTO_DES_S390 is not set
# CONFIG_CRYPTO_AES_S390 is not set
+CONFIG_S390_PRNG=m
#
# Library routines