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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* SHA-1 accelerated using the sparc64 crypto opcodes
*
* 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>
*/
#include <asm/elf.h>
#include <asm/opcodes.h>
#include <asm/pstate.h>
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha1_opcodes);
asmlinkage void sha1_sparc64_transform(struct sha1_block_state *state,
const u8 *data, size_t nblocks);
static void sha1_blocks(struct sha1_block_state *state,
const u8 *data, size_t nblocks)
{
if (static_branch_likely(&have_sha1_opcodes))
sha1_sparc64_transform(state, data, nblocks);
else
sha1_blocks_generic(state, data, nblocks);
}
#define sha1_mod_init_arch sha1_mod_init_arch
static inline void sha1_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_SHA1))
return;
static_branch_enable(&have_sha1_opcodes);
pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
}
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