[PATCH] crypto: x86/sha256 - implement ->digest for sha256

[Eric Biggers <ebiggers@kernel.org>]

From: Eric Biggers <ebiggers@google.com>

Implement a ->digest function for sha256-ssse3, sha256-avx, sha256-avx2,
and sha256-ni.  This improves the performance of crypto_shash_digest()
with these algorithms by reducing the number of indirect calls that are
made.

For now, don't bother with this for sha224, since sha224 is rarely used.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 arch/x86/crypto/sha256_ssse3_glue.c | 32 +++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/x86/crypto/sha256_ssse3_glue.c b/arch/x86/crypto/sha256_ssse3_glue.c
index d25235f0ccafc..4c0383a90e114 100644
--- a/arch/x86/crypto/sha256_ssse3_glue.c
+++ b/arch/x86/crypto/sha256_ssse3_glue.c
@@ -100,26 +100,34 @@ static int sha256_ssse3_finup(struct shash_desc *desc, const u8 *data,
 {
 	return sha256_finup(desc, data, len, out, sha256_transform_ssse3);
 }
 
 /* Add padding and return the message digest. */
 static int sha256_ssse3_final(struct shash_desc *desc, u8 *out)
 {
 	return sha256_ssse3_finup(desc, NULL, 0, out);
 }
 
+static int sha256_ssse3_digest(struct shash_desc *desc, const u8 *data,
+	      unsigned int len, u8 *out)
+{
+	return sha256_base_init(desc) ?:
+	       sha256_ssse3_finup(desc, data, len, out);
+}
+
 static struct shash_alg sha256_ssse3_algs[] = { {
 	.digestsize	=	SHA256_DIGEST_SIZE,
 	.init		=	sha256_base_init,
 	.update		=	sha256_ssse3_update,
 	.final		=	sha256_ssse3_final,
 	.finup		=	sha256_ssse3_finup,
+	.digest		=	sha256_ssse3_digest,
 	.descsize	=	sizeof(struct sha256_state),
 	.base		=	{
 		.cra_name	=	"sha256",
 		.cra_driver_name =	"sha256-ssse3",
 		.cra_priority	=	150,
 		.cra_blocksize	=	SHA256_BLOCK_SIZE,
 		.cra_module	=	THIS_MODULE,
 	}
 }, {
 	.digestsize	=	SHA224_DIGEST_SIZE,
@@ -165,26 +173,34 @@ static int sha256_avx_finup(struct shash_desc *desc, const u8 *data,
 		      unsigned int len, u8 *out)
 {
 	return sha256_finup(desc, data, len, out, sha256_transform_avx);
 }
 
 static int sha256_avx_final(struct shash_desc *desc, u8 *out)
 {
 	return sha256_avx_finup(desc, NULL, 0, out);
 }
 
+static int sha256_avx_digest(struct shash_desc *desc, const u8 *data,
+		      unsigned int len, u8 *out)
+{
+	return sha256_base_init(desc) ?:
+	       sha256_avx_finup(desc, data, len, out);
+}
+
 static struct shash_alg sha256_avx_algs[] = { {
 	.digestsize	=	SHA256_DIGEST_SIZE,
 	.init		=	sha256_base_init,
 	.update		=	sha256_avx_update,
 	.final		=	sha256_avx_final,
 	.finup		=	sha256_avx_finup,
+	.digest		=	sha256_avx_digest,
 	.descsize	=	sizeof(struct sha256_state),
 	.base		=	{
 		.cra_name	=	"sha256",
 		.cra_driver_name =	"sha256-avx",
 		.cra_priority	=	160,
 		.cra_blocksize	=	SHA256_BLOCK_SIZE,
 		.cra_module	=	THIS_MODULE,
 	}
 }, {
 	.digestsize	=	SHA224_DIGEST_SIZE,
@@ -241,26 +257,34 @@ static int sha256_avx2_finup(struct shash_desc *desc, const u8 *data,
 		      unsigned int len, u8 *out)
 {
 	return sha256_finup(desc, data, len, out, sha256_transform_rorx);
 }
 
 static int sha256_avx2_final(struct shash_desc *desc, u8 *out)
 {
 	return sha256_avx2_finup(desc, NULL, 0, out);
 }
 
+static int sha256_avx2_digest(struct shash_desc *desc, const u8 *data,
+		      unsigned int len, u8 *out)
+{
+	return sha256_base_init(desc) ?:
+	       sha256_avx2_finup(desc, data, len, out);
+}
+
 static struct shash_alg sha256_avx2_algs[] = { {
 	.digestsize	=	SHA256_DIGEST_SIZE,
 	.init		=	sha256_base_init,
 	.update		=	sha256_avx2_update,
 	.final		=	sha256_avx2_final,
 	.finup		=	sha256_avx2_finup,
+	.digest		=	sha256_avx2_digest,
 	.descsize	=	sizeof(struct sha256_state),
 	.base		=	{
 		.cra_name	=	"sha256",
 		.cra_driver_name =	"sha256-avx2",
 		.cra_priority	=	170,
 		.cra_blocksize	=	SHA256_BLOCK_SIZE,
 		.cra_module	=	THIS_MODULE,
 	}
 }, {
 	.digestsize	=	SHA224_DIGEST_SIZE,
@@ -316,26 +340,34 @@ static int sha256_ni_finup(struct shash_desc *desc, const u8 *data,
 		      unsigned int len, u8 *out)
 {
 	return sha256_finup(desc, data, len, out, sha256_ni_transform);
 }
 
 static int sha256_ni_final(struct shash_desc *desc, u8 *out)
 {
 	return sha256_ni_finup(desc, NULL, 0, out);
 }
 
+static int sha256_ni_digest(struct shash_desc *desc, const u8 *data,
+		      unsigned int len, u8 *out)
+{
+	return sha256_base_init(desc) ?:
+	       sha256_ni_finup(desc, data, len, out);
+}
+
 static struct shash_alg sha256_ni_algs[] = { {
 	.digestsize	=	SHA256_DIGEST_SIZE,
 	.init		=	sha256_base_init,
 	.update		=	sha256_ni_update,
 	.final		=	sha256_ni_final,
 	.finup		=	sha256_ni_finup,
+	.digest		=	sha256_ni_digest,
 	.descsize	=	sizeof(struct sha256_state),
 	.base		=	{
 		.cra_name	=	"sha256",
 		.cra_driver_name =	"sha256-ni",
 		.cra_priority	=	250,
 		.cra_blocksize	=	SHA256_BLOCK_SIZE,
 		.cra_module	=	THIS_MODULE,
 	}
 }, {
 	.digestsize	=	SHA224_DIGEST_SIZE,

base-commit: 8468516f9f93a41dc65158b6428a1a1039c68f20
-- 
2.42.0