mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
|
/* 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");
|
||
|
|
}
|