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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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45488c48e4
Let's use the error value that is typically used if HW support is not available when trying to load a module - this is also what systemd's systemd-modules-load.service expects. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Cryptographic API.
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*
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* s390 implementation of the SHA1 Secure Hash Algorithm.
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*
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* Derived from cryptoapi implementation, adapted for in-place
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* scatterlist interface. Originally based on the public domain
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* implementation written by Steve Reid.
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*
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* s390 Version:
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* Copyright IBM Corp. 2003, 2007
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* Author(s): Thomas Spatzier
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* Jan Glauber (jan.glauber@de.ibm.com)
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*
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* Derived from "crypto/sha1_generic.c"
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* Copyright (c) Alan Smithee.
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/cpufeature.h>
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#include <crypto/sha.h>
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#include <asm/cpacf.h>
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#include "sha.h"
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static int sha1_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA1_H0;
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sctx->state[1] = SHA1_H1;
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sctx->state[2] = SHA1_H2;
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sctx->state[3] = SHA1_H3;
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sctx->state[4] = SHA1_H4;
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sctx->count = 0;
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sctx->func = CPACF_KIMD_SHA_1;
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return 0;
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}
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static int sha1_export(struct shash_desc *desc, void *out)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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struct sha1_state *octx = out;
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octx->count = sctx->count;
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memcpy(octx->state, sctx->state, sizeof(octx->state));
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memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
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return 0;
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}
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static int sha1_import(struct shash_desc *desc, const void *in)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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const struct sha1_state *ictx = in;
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sctx->count = ictx->count;
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memcpy(sctx->state, ictx->state, sizeof(ictx->state));
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memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
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sctx->func = CPACF_KIMD_SHA_1;
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return 0;
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}
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static struct shash_alg alg = {
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.digestsize = SHA1_DIGEST_SIZE,
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.init = sha1_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha1_export,
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.import = sha1_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha1_state),
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.base = {
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.cra_name = "sha1",
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.cra_driver_name= "sha1-s390",
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.cra_priority = 300,
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.cra_blocksize = SHA1_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static int __init sha1_s390_init(void)
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{
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if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_1))
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return -ENODEV;
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return crypto_register_shash(&alg);
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}
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static void __exit sha1_s390_fini(void)
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{
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crypto_unregister_shash(&alg);
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}
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module_cpu_feature_match(MSA, sha1_s390_init);
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module_exit(sha1_s390_fini);
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MODULE_ALIAS_CRYPTO("sha1");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
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