[S390] crypto: avoid MSA3 and MSA4 instructions in ESA mode

MSA3 and MSA4 instructions are only available under CONFIG_64BIT.
Bail out before using any of these instructions if the kernel is
running in 31 bit mode.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/crypto/crypt_s390.h b/arch/s390/crypto/crypt_s390.h
index 4967677..ffd1ac2 100644 (file)
--- a/arch/s390/crypto/crypt_s390.h
+++ b/arch/s390/crypto/crypt_s390.h
@@ -368,9 +368,12 @@ static inline int crypt_s390_func_available(int func,
 
        if (facility_mask & CRYPT_S390_MSA && !test_facility(17))
                return 0;
-       if (facility_mask & CRYPT_S390_MSA3 && !test_facility(76))
+
+       if (facility_mask & CRYPT_S390_MSA3 &&
+           (!test_facility(2) || !test_facility(76)))
                return 0;
-       if (facility_mask & CRYPT_S390_MSA4 && !test_facility(77))
+       if (facility_mask & CRYPT_S390_MSA4 &&
+           (!test_facility(2) || !test_facility(77)))
                return 0;
 
        switch (func & CRYPT_S390_OP_MASK) {