diff options
Diffstat (limited to 'lib/crypto/s390/sha1.h')
-rw-r--r-- | lib/crypto/s390/sha1.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/crypto/s390/sha1.h b/lib/crypto/s390/sha1.h new file mode 100644 index 000000000000..08bd138e881c --- /dev/null +++ b/lib/crypto/s390/sha1.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * SHA-1 optimized using the CP Assist for Cryptographic Functions (CPACF) + * + * Copyright 2025 Google LLC + */ +#include <asm/cpacf.h> +#include <linux/cpufeature.h> + +static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_cpacf_sha1); + +static void sha1_blocks(struct sha1_block_state *state, + const u8 *data, size_t nblocks) +{ + if (static_branch_likely(&have_cpacf_sha1)) + cpacf_kimd(CPACF_KIMD_SHA_1, state, data, + nblocks * SHA1_BLOCK_SIZE); + else + sha1_blocks_generic(state, data, nblocks); +} + +#define sha1_mod_init_arch sha1_mod_init_arch +static inline void sha1_mod_init_arch(void) +{ + if (cpu_have_feature(S390_CPU_FEATURE_MSA) && + cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_1)) + static_branch_enable(&have_cpacf_sha1); +} |