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// 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"
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