/* SPDX-License-Identifier: GPL-2.0-only */ /* * SHA-512 accelerated using the sparc64 sha512 opcodes * * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> * Copyright (c) 2003 Kyle McMartin <kyle@debian.org> */ #include <asm/elf.h> #include <asm/opcodes.h> #include <asm/pstate.h> static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha512_opcodes); asmlinkage void sha512_sparc64_transform(struct sha512_block_state *state, const u8 *data, size_t nblocks); static void sha512_blocks(struct sha512_block_state *state, const u8 *data, size_t nblocks) { if (static_branch_likely(&have_sha512_opcodes)) sha512_sparc64_transform(state, data, nblocks); else sha512_blocks_generic(state, data, nblocks); } #define sha512_mod_init_arch sha512_mod_init_arch static inline void sha512_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_SHA512)) return; static_branch_enable(&have_sha512_opcodes); pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n"); }