crypto: s390 - extend crypto facility check

The specification which crypto facility is required for an algorithm is added
as a parameter to the availability check which is done before an algorithm is
registered. With this change it is easier to add new algorithms that require
different facilities.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

7 files changed, 20 insertions, 12 deletions

diff --git a/arch/s390/crypto/aes_s390.c b/arch/s390/crypto/aes_s390.c
index 58f46734465..fc97b949254 100644
--- a/arch/s390/crypto/aes_s390.c
+++ b/arch/s390/crypto/aes_s390.c
@@ -508,11 +508,11 @@ static int __init aes_s390_init(void)
 {
         int ret;
 
-        if (crypt_s390_func_available(KM_AES_128_ENCRYPT))
+        if (crypt_s390_func_available(KM_AES_128_ENCRYPT, CRYPT_S390_MSA))
                 keylen_flag |= AES_KEYLEN_128;
-        if (crypt_s390_func_available(KM_AES_192_ENCRYPT))
+        if (crypt_s390_func_available(KM_AES_192_ENCRYPT, CRYPT_S390_MSA))
                 keylen_flag |= AES_KEYLEN_192;
-        if (crypt_s390_func_available(KM_AES_256_ENCRYPT))
+        if (crypt_s390_func_available(KM_AES_256_ENCRYPT, CRYPT_S390_MSA))
                 keylen_flag |= AES_KEYLEN_256;
 
         if (!keylen_flag)
diff --git a/arch/s390/crypto/crypt_s390.h b/arch/s390/crypto/crypt_s390.h
index 7ee9a1b4ad9..4b8c96cab25 100644
--- a/arch/s390/crypto/crypt_s390.h
+++ b/arch/s390/crypto/crypt_s390.h
@@ -24,6 +24,10 @@
 #define CRYPT_S390_PRIORITY 300
 #define CRYPT_S390_COMPOSITE_PRIORITY 400
 
+#define CRYPT_S390_MSA  0x1
+#define CRYPT_S390_MSA3 0x2
+#define CRYPT_S390_MSA4 0x4
+
 /* s390 cryptographic operations */
 enum crypt_s390_operations {
         CRYPT_S390_KM   = 0x0100,
@@ -291,13 +295,17 @@ static inline int crypt_s390_kmac(long func, void *param,
  *
  * Returns 1 if func available; 0 if func or op in general not available
  */
-static inline int crypt_s390_func_available(int func)
+static inline int crypt_s390_func_available(int func,
+                                            unsigned int facility_mask)
 {
         unsigned char status[16];
         int ret;
 
-        /* check if CPACF facility (bit 17) is available */
-        if (!test_facility(17))
+        if (facility_mask & CRYPT_S390_MSA && !test_facility(17))
+                return 0;
+        if (facility_mask & CRYPT_S390_MSA3 && !test_facility(76))
+                return 0;
+        if (facility_mask & CRYPT_S390_MSA4 && !test_facility(77))
                 return 0;
 
         switch (func & CRYPT_S390_OP_MASK) {
diff --git a/arch/s390/crypto/des_s390.c b/arch/s390/crypto/des_s390.c
index cc542011839..1121e73115a 100644
--- a/arch/s390/crypto/des_s390.c
+++ b/arch/s390/crypto/des_s390.c
@@ -381,8 +381,8 @@ static int des_s390_init(void)
 {
         int ret;
 
-        if (!crypt_s390_func_available(KM_DEA_ENCRYPT) ||
-            !crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
+        if (!crypt_s390_func_available(KM_DEA_ENCRYPT, CRYPT_S390_MSA) ||
+            !crypt_s390_func_available(KM_TDEA_192_ENCRYPT, CRYPT_S390_MSA))
                 return -EOPNOTSUPP;
 
         ret = crypto_register_alg(&des_alg);
diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index 975e3ab13cb..0fc8115b0ae 100644
--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -166,7 +166,7 @@ static int __init prng_init(void)
         int ret;
 
         /* check if the CPU has a PRNG */
-        if (!crypt_s390_func_available(KMC_PRNG))
+        if (!crypt_s390_func_available(KMC_PRNG, CRYPT_S390_MSA))
                 return -EOPNOTSUPP;
 
         if (prng_chunk_size < 8)
diff --git a/arch/s390/crypto/sha1_s390.c b/arch/s390/crypto/sha1_s390.c
index f6de7826c97..e9868c6e0a0 100644
--- a/arch/s390/crypto/sha1_s390.c
+++ b/arch/s390/crypto/sha1_s390.c
@@ -90,7 +90,7 @@ static struct shash_alg alg = {
 
 static int __init sha1_s390_init(void)
 {
-        if (!crypt_s390_func_available(KIMD_SHA_1))
+        if (!crypt_s390_func_available(KIMD_SHA_1, CRYPT_S390_MSA))
                 return -EOPNOTSUPP;
         return crypto_register_shash(&alg);
 }
diff --git a/arch/s390/crypto/sha256_s390.c b/arch/s390/crypto/sha256_s390.c
index 61a7db37212..5ed8d64fc2e 100644
--- a/arch/s390/crypto/sha256_s390.c
+++ b/arch/s390/crypto/sha256_s390.c
@@ -86,7 +86,7 @@ static struct shash_alg alg = {
 
 static int sha256_s390_init(void)
 {
-        if (!crypt_s390_func_available(KIMD_SHA_256))
+        if (!crypt_s390_func_available(KIMD_SHA_256, CRYPT_S390_MSA))
                 return -EOPNOTSUPP;
 
         return crypto_register_shash(&alg);
diff --git a/arch/s390/crypto/sha512_s390.c b/arch/s390/crypto/sha512_s390.c
index 4bf73d0dc52..32a81383b69 100644
--- a/arch/s390/crypto/sha512_s390.c
+++ b/arch/s390/crypto/sha512_s390.c
@@ -132,7 +132,7 @@ static int __init init(void)
 {
         int ret;
 
-        if (!crypt_s390_func_available(KIMD_SHA_512))
+        if (!crypt_s390_func_available(KIMD_SHA_512, CRYPT_S390_MSA))
                 return -EOPNOTSUPP;
         if ((ret = crypto_register_shash(&sha512_alg)) < 0)
                 goto out;