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// SPDX-License-Identifier: GPL-2.0-only
/* Glue code for SHA512 hashing optimized for sparc64 crypto opcodes.
*
* This is based largely upon crypto/sha512_generic.c
*
* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
*/
#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/sha2.h>
#include <crypto/sha512_base.h>
#include <linux/kernel.h>
#include <linux/module.h>
asmlinkage void sha512_sparc64_transform(u64 *digest, const char *data,
unsigned int rounds);
static void sha512_block(struct sha512_state *sctx, const u8 *src, int blocks)
{
sha512_sparc64_transform(sctx->state, src, blocks);
}
static int sha512_sparc64_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return sha512_base_do_update_blocks(desc, data, len, sha512_block);
}
static int sha512_sparc64_finup(struct shash_desc *desc, const u8 *src,
unsigned int len, u8 *out)
{
sha512_base_do_finup(desc, src, len, sha512_block);
return sha512_base_finish(desc, out);
}
static struct shash_alg sha512 = {
.digestsize = SHA512_DIGEST_SIZE,
.init = sha512_base_init,
.update = sha512_sparc64_update,
.finup = sha512_sparc64_finup,
.descsize = SHA512_STATE_SIZE,
.base = {
.cra_name = "sha512",
.cra_driver_name= "sha512-sparc64",
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.cra_blocksize = SHA512_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static struct shash_alg sha384 = {
.digestsize = SHA384_DIGEST_SIZE,
.init = sha384_base_init,
.update = sha512_sparc64_update,
.finup = sha512_sparc64_finup,
.descsize = SHA512_STATE_SIZE,
.base = {
.cra_name = "sha384",
.cra_driver_name= "sha384-sparc64",
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.cra_blocksize = SHA384_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static bool __init sparc64_has_sha512_opcode(void)
{
unsigned long cfr;
if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
return false;
__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
if (!(cfr & CFR_SHA512))
return false;
return true;
}
static int __init sha512_sparc64_mod_init(void)
{
if (sparc64_has_sha512_opcode()) {
int ret = crypto_register_shash(&sha384);
if (ret < 0)
return ret;
ret = crypto_register_shash(&sha512);
if (ret < 0) {
crypto_unregister_shash(&sha384);
return ret;
}
pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n");
return 0;
}
pr_info("sparc64 sha512 opcode not available.\n");
return -ENODEV;
}
static void __exit sha512_sparc64_mod_fini(void)
{
crypto_unregister_shash(&sha384);
crypto_unregister_shash(&sha512);
}
module_init(sha512_sparc64_mod_init);
module_exit(sha512_sparc64_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA-384 and SHA-512 Secure Hash Algorithm, sparc64 sha512 opcode accelerated");
MODULE_ALIAS_CRYPTO("sha384");
MODULE_ALIAS_CRYPTO("sha512");
#include "crop_devid.c"
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