lib/crypto: sparc/sha1: Migrate optimized code into library

Instead of exposing the sparc-optimized SHA-1 code via sparc-specific
crypto_shash algorithms, instead just implement the sha1_blocks()
library function.  This is much simpler, it makes the SHA-1 library
functions be sparc-optimized, and it fixes the longstanding issue where
the sparc-optimized SHA-1 code was disabled by default.  SHA-1 still
remains available through crypto_shash, but individual architectures no
longer need to handle it.

Note: to see the diff from arch/sparc/crypto/sha1_glue.c to
lib/crypto/sparc/sha1.h, view this commit with 'git show -M10'.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250712232329.818226-13-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

4 files changed, 0 insertions, 178 deletions

diff --git a/arch/sparc/crypto/Kconfig b/arch/sparc/crypto/Kconfig
index 9d8da9aef3a4..f5b2e720fec3 100644
--- a/arch/sparc/crypto/Kconfig
+++ b/arch/sparc/crypto/Kconfig
@@ -26,16 +26,6 @@ config CRYPTO_MD5_SPARC64
 
 	  Architecture: sparc64 using crypto instructions, when available
 
-config CRYPTO_SHA1_SPARC64
-	tristate "Hash functions: SHA-1"
-	depends on SPARC64
-	select CRYPTO_SHA1
-	select CRYPTO_HASH
-	help
-	  SHA-1 secure hash algorithm (FIPS 180)
-
-	  Architecture: sparc64
-
 config CRYPTO_AES_SPARC64
 	tristate "Ciphers: AES, modes: ECB, CBC, CTR"
 	depends on SPARC64
diff --git a/arch/sparc/crypto/Makefile b/arch/sparc/crypto/Makefile
index 99a7e8fd13bc..0d05a17988c4 100644
--- a/arch/sparc/crypto/Makefile
+++ b/arch/sparc/crypto/Makefile
@@ -3,14 +3,12 @@
 # Arch-specific CryptoAPI modules.
 #
 
-obj-$(CONFIG_CRYPTO_SHA1_SPARC64) += sha1-sparc64.o
 obj-$(CONFIG_CRYPTO_MD5_SPARC64) += md5-sparc64.o
 
 obj-$(CONFIG_CRYPTO_AES_SPARC64) += aes-sparc64.o
 obj-$(CONFIG_CRYPTO_DES_SPARC64) += des-sparc64.o
 obj-$(CONFIG_CRYPTO_CAMELLIA_SPARC64) += camellia-sparc64.o
 
-sha1-sparc64-y := sha1_asm.o sha1_glue.o
 md5-sparc64-y := md5_asm.o md5_glue.o
 
 aes-sparc64-y := aes_asm.o aes_glue.o
diff --git a/arch/sparc/crypto/sha1_asm.S b/arch/sparc/crypto/sha1_asm.S
deleted file mode 100644
index 00b46bac1b08..000000000000
--- a/arch/sparc/crypto/sha1_asm.S
+++ /dev/null
@@ -1,72 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <linux/linkage.h>
-#include <asm/opcodes.h>
-#include <asm/visasm.h>
-
-ENTRY(sha1_sparc64_transform)
-	/* %o0 = digest, %o1 = data, %o2 = rounds */
-	VISEntryHalf
-	ld	[%o0 + 0x00], %f0
-	ld	[%o0 + 0x04], %f1
-	ld	[%o0 + 0x08], %f2
-	andcc	%o1, 0x7, %g0
-	ld	[%o0 + 0x0c], %f3
-	bne,pn	%xcc, 10f
-	 ld	[%o0 + 0x10], %f4
-
-1:
-	ldd	[%o1 + 0x00], %f8
-	ldd	[%o1 + 0x08], %f10
-	ldd	[%o1 + 0x10], %f12
-	ldd	[%o1 + 0x18], %f14
-	ldd	[%o1 + 0x20], %f16
-	ldd	[%o1 + 0x28], %f18
-	ldd	[%o1 + 0x30], %f20
-	ldd	[%o1 + 0x38], %f22
-
-	SHA1
-
-	subcc	%o2, 1, %o2
-	bne,pt	%xcc, 1b
-	 add	%o1, 0x40, %o1
-
-5:
-	st	%f0, [%o0 + 0x00]
-	st	%f1, [%o0 + 0x04]
-	st	%f2, [%o0 + 0x08]
-	st	%f3, [%o0 + 0x0c]
-	st	%f4, [%o0 + 0x10]
-	retl
-	 VISExitHalf
-10:
-	alignaddr %o1, %g0, %o1
-
-	ldd	[%o1 + 0x00], %f10
-1:
-	ldd	[%o1 + 0x08], %f12
-	ldd	[%o1 + 0x10], %f14
-	ldd	[%o1 + 0x18], %f16
-	ldd	[%o1 + 0x20], %f18
-	ldd	[%o1 + 0x28], %f20
-	ldd	[%o1 + 0x30], %f22
-	ldd	[%o1 + 0x38], %f24
-	ldd	[%o1 + 0x40], %f26
-
-	faligndata %f10, %f12, %f8
-	faligndata %f12, %f14, %f10
-	faligndata %f14, %f16, %f12
-	faligndata %f16, %f18, %f14
-	faligndata %f18, %f20, %f16
-	faligndata %f20, %f22, %f18
-	faligndata %f22, %f24, %f20
-	faligndata %f24, %f26, %f22
-
-	SHA1
-
-	subcc	%o2, 1, %o2
-	fsrc2	%f26, %f10
-	bne,pt	%xcc, 1b
-	 add	%o1, 0x40, %o1
-
-	ba,a,pt	%xcc, 5b
-ENDPROC(sha1_sparc64_transform)
diff --git a/arch/sparc/crypto/sha1_glue.c b/arch/sparc/crypto/sha1_glue.c
deleted file mode 100644
index ef19d5023b1b..000000000000
--- a/arch/sparc/crypto/sha1_glue.c
+++ /dev/null
@@ -1,94 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* Glue code for SHA1 hashing optimized for sparc64 crypto opcodes.
- *
- * This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
- *
- * Copyright (c) Alan Smithee.
- * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
- * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
- * Copyright (c) Mathias Krause <minipli@googlemail.com>
- */
-
-#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
-
-#include <asm/elf.h>
-#include <asm/opcodes.h>
-#include <asm/pstate.h>
-#include <crypto/internal/hash.h>
-#include <crypto/sha1.h>
-#include <crypto/sha1_base.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-
-asmlinkage void sha1_sparc64_transform(struct sha1_state *digest,
-				       const u8 *data, int rounds);
-
-static int sha1_sparc64_update(struct shash_desc *desc, const u8 *data,
-			       unsigned int len)
-{
-	return sha1_base_do_update_blocks(desc, data, len,
-					  sha1_sparc64_transform);
-}
-
-/* Add padding and return the message digest. */
-static int sha1_sparc64_finup(struct shash_desc *desc, const u8 *src,
-			      unsigned int len, u8 *out)
-{
-	sha1_base_do_finup(desc, src, len, sha1_sparc64_transform);
-	return sha1_base_finish(desc, out);
-}
-
-static struct shash_alg alg = {
-	.digestsize	=	SHA1_DIGEST_SIZE,
-	.init		=	sha1_base_init,
-	.update		=	sha1_sparc64_update,
-	.finup		=	sha1_sparc64_finup,
-	.descsize	=	SHA1_STATE_SIZE,
-	.base		=	{
-		.cra_name	=	"sha1",
-		.cra_driver_name=	"sha1-sparc64",
-		.cra_priority	=	SPARC_CR_OPCODE_PRIORITY,
-		.cra_flags	=	CRYPTO_AHASH_ALG_BLOCK_ONLY,
-		.cra_blocksize	=	SHA1_BLOCK_SIZE,
-		.cra_module	=	THIS_MODULE,
-	}
-};
-
-static bool __init sparc64_has_sha1_opcode(void)
-{
-	unsigned long cfr;
-
-	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
-		return false;
-
-	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
-	if (!(cfr & CFR_SHA1))
-		return false;
-
-	return true;
-}
-
-static int __init sha1_sparc64_mod_init(void)
-{
-	if (sparc64_has_sha1_opcode()) {
-		pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
-		return crypto_register_shash(&alg);
-	}
-	pr_info("sparc64 sha1 opcode not available.\n");
-	return -ENODEV;
-}
-
-static void __exit sha1_sparc64_mod_fini(void)
-{
-	crypto_unregister_shash(&alg);
-}
-
-module_init(sha1_sparc64_mod_init);
-module_exit(sha1_sparc64_mod_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated");
-
-MODULE_ALIAS_CRYPTO("sha1");
-
-#include "crop_devid.c"