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crypto: x86/sha256 - Add simd block function

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Add CRYPTO_ARCH_HAVE_LIB_SHA256_SIMD and a SIMD block function
so that the caller can decide whether to use SIMD.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-05-02 13:31:07 +08:00
parent 491d6024f2
commit ee8a720e39
2 changed files with 10 additions and 3 deletions
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1
arch/x86/lib/crypto/Kconfig
View file

@ -30,4 +30,5 @@ config CRYPTO_SHA256_X86_64
depends on 64BIT
default CRYPTO_LIB_SHA256
select CRYPTO_ARCH_HAVE_LIB_SHA256
select CRYPTO_ARCH_HAVE_LIB_SHA256_SIMD
select CRYPTO_LIB_SHA256_GENERIC

12
arch/x86/lib/crypto/sha256.c
View file

@ -6,7 +6,6 @@
*/
#include <asm/fpu/api.h>
#include <crypto/internal/sha2.h>
#include <crypto/internal/simd.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/static_call.h>
@ -24,10 +23,10 @@ static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha256_x86);
DEFINE_STATIC_CALL(sha256_blocks_x86, sha256_transform_ssse3);
void sha256_blocks_arch(u32 state[SHA256_STATE_WORDS],
void sha256_blocks_simd(u32 state[SHA256_STATE_WORDS],
const u8 *data, size_t nblocks)
{
if (static_branch_likely(&have_sha256_x86) && crypto_simd_usable()) {
if (static_branch_likely(&have_sha256_x86)) {
kernel_fpu_begin();
static_call(sha256_blocks_x86)(state, data, nblocks);
kernel_fpu_end();
@ -35,6 +34,13 @@ void sha256_blocks_arch(u32 state[SHA256_STATE_WORDS],
sha256_blocks_generic(state, data, nblocks);
}
}
EXPORT_SYMBOL_GPL(sha256_blocks_simd);
void sha256_blocks_arch(u32 state[SHA256_STATE_WORDS],
const u8 *data, size_t nblocks)
{
sha256_blocks_generic(state, data, nblocks);
}
EXPORT_SYMBOL_GPL(sha256_blocks_arch);
bool sha256_is_arch_optimized(void)