crypto: s390 - move library functions to arch/s390/lib/crypto/

Continue disentangling the crypto library functions from the generic
crypto infrastructure by moving the s390 ChaCha library functions into a
new directory arch/s390/lib/crypto/ that does not depend on CRYPTO.
This mirrors the distinction between crypto/ and lib/crypto/.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/s390/crypto/Kconfig

@@ -99,12 +99,6 @@ config CRYPTO_DES_S390
 	  As of z990 the ECB and CBC mode are hardware accelerated.
 	  As of z196 the CTR mode is hardware accelerated.
 
-config CRYPTO_CHACHA_S390
-	tristate
-	select CRYPTO_LIB_CHACHA_GENERIC
-	select CRYPTO_ARCH_HAVE_LIB_CHACHA
-	default CRYPTO_LIB_CHACHA_INTERNAL
-
 config CRYPTO_HMAC_S390
 	tristate "Keyed-hash message authentication code: HMAC"
 	select CRYPTO_HASH

arch/s390/crypto/Makefile

@@ -11,10 +11,7 @@ obj-$(CONFIG_CRYPTO_SHA3_512_S390) += sha3_512_s390.o sha_common.o
 obj-$(CONFIG_CRYPTO_DES_S390) += des_s390.o
 obj-$(CONFIG_CRYPTO_AES_S390) += aes_s390.o
 obj-$(CONFIG_CRYPTO_PAES_S390) += paes_s390.o
-obj-$(CONFIG_CRYPTO_CHACHA_S390) += chacha_s390.o
 obj-$(CONFIG_S390_PRNG) += prng.o
 obj-$(CONFIG_CRYPTO_GHASH_S390) += ghash_s390.o
 obj-$(CONFIG_CRYPTO_HMAC_S390) += hmac_s390.o
 obj-y += arch_random.o
-
-chacha_s390-y := chacha-glue.o chacha-s390.o

arch/s390/lib/Makefile

@@ -3,6 +3,7 @@
 # Makefile for s390-specific library files..
 #
 
+obj-y += crypto/
 lib-y += delay.o string.o uaccess.o find.o spinlock.o tishift.o
 lib-y += csum-partial.o
 obj-y += mem.o xor.o

arch/s390/lib/crypto/Kconfig

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config CRYPTO_CHACHA_S390
+	tristate
+	default CRYPTO_LIB_CHACHA_INTERNAL
+	select CRYPTO_LIB_CHACHA_GENERIC
+	select CRYPTO_ARCH_HAVE_LIB_CHACHA

arch/s390/lib/crypto/Makefile

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_CRYPTO_CHACHA_S390) += chacha_s390.o
+chacha_s390-y := chacha-glue.o chacha-s390.o

lib/crypto/Kconfig

@@ -171,6 +171,9 @@ endif
 if RISCV
 source "arch/riscv/lib/crypto/Kconfig"
 endif
+if S390
+source "arch/s390/lib/crypto/Kconfig"
+endif
 endif
 
 endmenu