Instead of exposing the sparc-optimized MD5 code via sparc-specific
crypto_shash algorithms, instead just implement the md5_blocks() library
function. This is much simpler, it makes the MD5 library functions be
sparc-optimized, and it fixes the longstanding issue where the
sparc-optimized MD5 code was disabled by default. MD5 still remains
available through crypto_shash, but individual architectures no longer
need to handle it.
Note: to see the diff from arch/sparc/crypto/md5_glue.c to
lib/crypto/sparc/md5.h, view this commit with 'git show -M10'.
Signed-off-by: Eric Biggers <ebigg...@kernel.org>
---
arch/sparc/crypto/Kconfig | 10 -
arch/sparc/crypto/Makefile | 4 -
arch/sparc/crypto/md5_glue.c | 174 ------------------
lib/crypto/Kconfig | 1 +
lib/crypto/Makefile | 1 +
lib/crypto/sparc/md5.h | 48 +++++
.../crypto => lib/crypto/sparc}/md5_asm.S | 0
7 files changed, 50 insertions(+), 188 deletions(-)
delete mode 100644 arch/sparc/crypto/md5_glue.c
create mode 100644 lib/crypto/sparc/md5.h
rename {arch/sparc/crypto => lib/crypto/sparc}/md5_asm.S (100%)
diff --git a/arch/sparc/crypto/Kconfig b/arch/sparc/crypto/Kconfig
index f5b2e720fec3c..f755da9795346 100644
--- a/arch/sparc/crypto/Kconfig
+++ b/arch/sparc/crypto/Kconfig
@@ -14,20 +14,10 @@ config CRYPTO_DES_SPARC64
Length-preserving ciphers: DES with ECB and CBC modes
Length-preserving ciphers: Tripe DES EDE with ECB and CBC modes
Architecture: sparc64
-config CRYPTO_MD5_SPARC64
- tristate "Digests: MD5"
- depends on SPARC64
- select CRYPTO_MD5
- select CRYPTO_HASH
- help
- MD5 message digest algorithm (RFC1321)
-
- Architecture: sparc64 using crypto instructions, when available
-
config CRYPTO_AES_SPARC64
tristate "Ciphers: AES, modes: ECB, CBC, CTR"
depends on SPARC64
select CRYPTO_SKCIPHER
help
diff --git a/arch/sparc/crypto/Makefile b/arch/sparc/crypto/Makefile
index 0d05a17988c4c..7b4796842ddd7 100644
--- a/arch/sparc/crypto/Makefile
+++ b/arch/sparc/crypto/Makefile
@@ -1,16 +1,12 @@
# SPDX-License-Identifier: GPL-2.0
#
# Arch-specific CryptoAPI modules.
#
-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
-md5-sparc64-y := md5_asm.o md5_glue.o
-
aes-sparc64-y := aes_asm.o aes_glue.o
des-sparc64-y := des_asm.o des_glue.o
camellia-sparc64-y := camellia_asm.o camellia_glue.o
diff --git a/arch/sparc/crypto/md5_glue.c b/arch/sparc/crypto/md5_glue.c
deleted file mode 100644
index b3615f0cdf626..0000000000000
--- a/arch/sparc/crypto/md5_glue.c
+++ /dev/null
@@ -1,174 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* Glue code for MD5 hashing optimized for sparc64 crypto opcodes.
- *
- * This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
- * and crypto/md5.c which are:
- *
- * Copyright (c) Alan Smithee.
- * Copyright (c) Andrew McDonald <and...@mcdonald.org.uk>
- * Copyright (c) Jean-Francois Dive <j...@linuxbe.org>
- * Copyright (c) Mathias Krause <mini...@googlemail.com>
- * Copyright (c) Cryptoapi developers.
- * Copyright (c) 2002 James Morris <jmor...@intercode.com.au>
- */
-
-#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/md5.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/unaligned.h>
-
-struct sparc_md5_state {
- __le32 hash[MD5_HASH_WORDS];
- u64 byte_count;
-};
-
-asmlinkage void md5_sparc64_transform(__le32 *digest, const char *data,
- unsigned int rounds);
-
-static int md5_sparc64_init(struct shash_desc *desc)
-{
- struct sparc_md5_state *mctx = shash_desc_ctx(desc);
-
- mctx->hash[0] = cpu_to_le32(MD5_H0);
- mctx->hash[1] = cpu_to_le32(MD5_H1);
- mctx->hash[2] = cpu_to_le32(MD5_H2);
- mctx->hash[3] = cpu_to_le32(MD5_H3);
- mctx->byte_count = 0;
-
- return 0;
-}
-
-static int md5_sparc64_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- struct sparc_md5_state *sctx = shash_desc_ctx(desc);
-
- sctx->byte_count += round_down(len, MD5_HMAC_BLOCK_SIZE);
- md5_sparc64_transform(sctx->hash, data, len / MD5_HMAC_BLOCK_SIZE);
- return len - round_down(len, MD5_HMAC_BLOCK_SIZE);
-}
-
-/* Add padding and return the message digest. */
-static int md5_sparc64_finup(struct shash_desc *desc, const u8 *src,
- unsigned int offset, u8 *out)
-{
- struct sparc_md5_state *sctx = shash_desc_ctx(desc);
- __le64 block[MD5_BLOCK_WORDS] = {};
- u8 *p = memcpy(block, src, offset);
- __le32 *dst = (__le32 *)out;
- __le64 *pbits;
- int i;
-
- src = p;
- p += offset;
- *p++ = 0x80;
- sctx->byte_count += offset;
- pbits = &block[(MD5_BLOCK_WORDS / (offset > 55 ? 1 : 2)) - 1];
- *pbits = cpu_to_le64(sctx->byte_count << 3);
- md5_sparc64_transform(sctx->hash, src, (pbits - block + 1) / 8);
- memzero_explicit(block, sizeof(block));
-
- /* Store state in digest */
- for (i = 0; i < MD5_HASH_WORDS; i++)
- dst[i] = sctx->hash[i];
-
- return 0;
-}
-
-static int md5_sparc64_export(struct shash_desc *desc, void *out)
-{
- struct sparc_md5_state *sctx = shash_desc_ctx(desc);
- union {
- u8 *u8;
- u32 *u32;
- u64 *u64;
- } p = { .u8 = out };
- int i;
-
- for (i = 0; i < MD5_HASH_WORDS; i++)
- put_unaligned(le32_to_cpu(sctx->hash[i]), p.u32++);
- put_unaligned(sctx->byte_count, p.u64);
- return 0;
-}
-
-static int md5_sparc64_import(struct shash_desc *desc, const void *in)
-{
- struct sparc_md5_state *sctx = shash_desc_ctx(desc);
- union {
- const u8 *u8;
- const u32 *u32;
- const u64 *u64;
- } p = { .u8 = in };
- int i;
-
- for (i = 0; i < MD5_HASH_WORDS; i++)
- sctx->hash[i] = cpu_to_le32(get_unaligned(p.u32++));
- sctx->byte_count = get_unaligned(p.u64);
- return 0;
-}
-
-static struct shash_alg alg = {
- .digestsize = MD5_DIGEST_SIZE,
- .init = md5_sparc64_init,
- .update = md5_sparc64_update,
- .finup = md5_sparc64_finup,
- .export = md5_sparc64_export,
- .import = md5_sparc64_import,
- .descsize = sizeof(struct sparc_md5_state),
- .statesize = sizeof(struct sparc_md5_state),
- .base = {
- .cra_name = "md5",
- .cra_driver_name= "md5-sparc64",
- .cra_priority = SPARC_CR_OPCODE_PRIORITY,
- .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- }
-};
-
-static bool __init sparc64_has_md5_opcode(void)
-{
- unsigned long cfr;
-
- if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
- return false;
-
- __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
- if (!(cfr & CFR_MD5))
- return false;
-
- return true;
-}
-
-static int __init md5_sparc64_mod_init(void)
-{
- if (sparc64_has_md5_opcode()) {
- pr_info("Using sparc64 md5 opcode optimized MD5
implementation\n");
- return crypto_register_shash(&alg);
- }
- pr_info("sparc64 md5 opcode not available.\n");
- return -ENODEV;
-}
-
-static void __exit md5_sparc64_mod_fini(void)
-{
- crypto_unregister_shash(&alg);
-}
-
-module_init(md5_sparc64_mod_init);
-module_exit(md5_sparc64_mod_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("MD5 Message Digest Algorithm, sparc64 md5 opcode
accelerated");
-
-MODULE_ALIAS_CRYPTO("md5");
-
-#include "crop_devid.c"
diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig
index cfbbfaae9fe29..2ca1d5b37dc0e 100644
--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -110,10 +110,11 @@ config CRYPTO_LIB_MD5
config CRYPTO_LIB_MD5_ARCH
bool
depends on CRYPTO_LIB_MD5 && !UML
default y if MIPS && CPU_CAVIUM_OCTEON
default y if PPC
+ default y if SPARC64
config CRYPTO_LIB_POLY1305_RSIZE
int
default 2 if MIPS
default 11 if X86_64
diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile
index 8360054481b84..e52a08937390c 100644
--- a/lib/crypto/Makefile
+++ b/lib/crypto/Makefile
@@ -64,10 +64,11 @@ libdes-y := des.o
obj-$(CONFIG_CRYPTO_LIB_MD5) += libmd5.o
libmd5-y := md5.o
ifeq ($(CONFIG_CRYPTO_LIB_MD5_ARCH),y)
CFLAGS_md5.o += -I$(src)/$(SRCARCH)
libmd5-$(CONFIG_PPC) += powerpc/md5-asm.o
+libmd5-$(CONFIG_SPARC) += sparc/md5_asm.o
endif # CONFIG_CRYPTO_LIB_MD5_ARCH
################################################################################
obj-$(CONFIG_CRYPTO_LIB_POLY1305) += libpoly1305.o
diff --git a/lib/crypto/sparc/md5.h b/lib/crypto/sparc/md5.h
new file mode 100644
index 0000000000000..3f1b0ed8c0b3f
--- /dev/null
+++ b/lib/crypto/sparc/md5.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * MD5 accelerated using the sparc64 crypto opcodes
+ *
+ * Copyright (c) Alan Smithee.
+ * Copyright (c) Andrew McDonald <and...@mcdonald.org.uk>
+ * Copyright (c) Jean-Francois Dive <j...@linuxbe.org>
+ * Copyright (c) Mathias Krause <mini...@googlemail.com>
+ * Copyright (c) Cryptoapi developers.
+ * Copyright (c) 2002 James Morris <jmor...@intercode.com.au>
+ */
+
+#include <asm/elf.h>
+#include <asm/opcodes.h>
+#include <asm/pstate.h>
+
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_md5_opcodes);
+
+asmlinkage void md5_sparc64_transform(struct md5_block_state *state,
+ const u8 *data, size_t nblocks);
+
+static void md5_blocks(struct md5_block_state *state,
+ const u8 *data, size_t nblocks)
+{
+ if (static_branch_likely(&have_md5_opcodes)) {
+ cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
+ md5_sparc64_transform(state, data, nblocks);
+ le32_to_cpu_array(state->h, ARRAY_SIZE(state->h));
+ } else {
+ md5_blocks_generic(state, data, nblocks);
+ }
+}
+
+#define md5_mod_init_arch md5_mod_init_arch
+static inline void md5_mod_init_arch(void)
+{
+ unsigned long cfr;
+
+ if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
+ return;
+
+ __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
+ if (!(cfr & CFR_MD5))
+ return;
+
+ static_branch_enable(&have_md5_opcodes);
+ pr_info("Using sparc64 md5 opcode optimized MD5 implementation\n");
+}
diff --git a/arch/sparc/crypto/md5_asm.S b/lib/crypto/sparc/md5_asm.S
similarity index 100%
rename from arch/sparc/crypto/md5_asm.S
rename to lib/crypto/sparc/md5_asm.S
--
2.50.1
