1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * SHA-512 accelerated using the sparc64 sha512 opcodes 4 * 5 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> 6 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> 7 * Copyright (c) 2003 Kyle McMartin <kyle@debian.org> 8 */ 9 10 #include <asm/elf.h> 11 #include <asm/opcodes.h> 12 #include <asm/pstate.h> 13 14 static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha512_opcodes); 15 16 asmlinkage void sha512_sparc64_transform(struct sha512_block_state *state, 17 const u8 *data, size_t nblocks); 18 19 static void sha512_blocks(struct sha512_block_state *state, 20 const u8 *data, size_t nblocks) 21 { 22 if (static_branch_likely(&have_sha512_opcodes)) 23 sha512_sparc64_transform(state, data, nblocks); 24 else 25 sha512_blocks_generic(state, data, nblocks); 26 } 27 28 #define sha512_mod_init_arch sha512_mod_init_arch 29 static inline void sha512_mod_init_arch(void) 30 { 31 unsigned long cfr; 32 33 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) 34 return; 35 36 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); 37 if (!(cfr & CFR_SHA512)) 38 return; 39 40 static_branch_enable(&have_sha512_opcodes); 41 pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n"); 42 } 43