/* 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 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"); }