crypto: ppc/curve25519 - Update Kconfig and Makefile for ppc64le

JIRA: https://issues.redhat.com/browse/RHEL-52758

commit b42519d
Author: Danny Tsen <dtsen@linux.ibm.com>
Date:   Thu May 16 11:19:57 2024 -0400

    crypto: ppc/curve25519 - Update Kconfig and Makefile for ppc64le

    Defined CRYPTO_CURVE25519_PPC64 to support X25519 for ppc64le.

    Added new module curve25519-ppc64le for X25519.

    Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Mamatha Inamdar <minamdar@redhat.com>

Author: Mamatha Inamdar

arch/powerpc/crypto/Makefile

@@ -16,6 +16,7 @@ obj-$(CONFIG_CRYPTO_VPMSUM_TESTER) += crc-vpmsum_test.o
 obj-$(CONFIG_CRYPTO_AES_GCM_P10) += aes-gcm-p10-crypto.o
 obj-$(CONFIG_CRYPTO_CHACHA20_P10) += chacha-p10-crypto.o
 obj-$(CONFIG_CRYPTO_POLY1305_P10) += poly1305-p10-crypto.o
+obj-$(CONFIG_CRYPTO_CURVE25519_PPC64) += curve25519-ppc64le.o
 
 aes-ppc-spe-y := aes-spe-core.o aes-spe-keys.o aes-tab-4k.o aes-spe-modes.o aes-spe-glue.o
 md5-ppc-y := md5-asm.o md5-glue.o
@@ -27,6 +28,7 @@ crct10dif-vpmsum-y := crct10dif-vpmsum_asm.o crct10dif-vpmsum_glue.o
 aes-gcm-p10-crypto-y := aes-gcm-p10-glue.o aes-gcm-p10.o ghashp10-ppc.o aesp10-ppc.o
 chacha-p10-crypto-y := chacha-p10-glue.o chacha-p10le-8x.o
 poly1305-p10-crypto-y := poly1305-p10-glue.o poly1305-p10le_64.o
+curve25519-ppc64le-y := curve25519-ppc64le-core.o curve25519-ppc64le_asm.o
 
 quiet_cmd_perl = PERL    $@
       cmd_perl = $(PERL) $< $(if $(CONFIG_CPU_LITTLE_ENDIAN), linux-ppc64le, linux-ppc64) > $@

crypto/Kconfig

@@ -775,6 +775,14 @@ config CRYPTO_CRCT10DIF_PCLMUL
 	  'crct10dif-pclmul' module, which is faster when computing the
 	  crct10dif checksum as compared with the generic table implementation.
 
+config CRYPTO_CURVE25519_PPC64
+	tristate "Public key crypto: Curve25519 (PowerPC64)"
+	depends on PPC64 && CPU_LITTLE_ENDIAN
+	select CRYPTO_LIB_CURVE25519_GENERIC
+	select CRYPTO_ARCH_HAVE_LIB_CURVE25519
+	help
+	  Support curve25519 algorithm for PowerPC64 in little-endian mode.
+
 config CRYPTO_CRCT10DIF_VPMSUM
 	tristate "CRC32T10DIF powerpc64 hardware acceleration"
 	depends on PPC64 && ALTIVEC && CRC_T10DIF