diff options
Diffstat (limited to 'lib/crypto/sparc/sha256.h')
-rw-r--r-- | lib/crypto/sparc/sha256.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/lib/crypto/sparc/sha256.h b/lib/crypto/sparc/sha256.h new file mode 100644 index 000000000000..1d10108eb195 --- /dev/null +++ b/lib/crypto/sparc/sha256.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * SHA-256 accelerated using the sparc64 sha256 opcodes + * + * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> + * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> + * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> + * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> + */ + +#include <asm/elf.h> +#include <asm/opcodes.h> +#include <asm/pstate.h> + +static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha256_opcodes); + +asmlinkage void sha256_sparc64_transform(struct sha256_block_state *state, + const u8 *data, size_t nblocks); + +static void sha256_blocks(struct sha256_block_state *state, + const u8 *data, size_t nblocks) +{ + if (static_branch_likely(&have_sha256_opcodes)) + sha256_sparc64_transform(state, data, nblocks); + else + sha256_blocks_generic(state, data, nblocks); +} + +#define sha256_mod_init_arch sha256_mod_init_arch +static inline void sha256_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_SHA256)) + return; + + static_branch_enable(&have_sha256_opcodes); + pr_info("Using sparc64 sha256 opcode optimized SHA-256/SHA-224 implementation\n"); +} |