linux-kernel - [PATCH] crypto: atmel - add CRYPTO_ALG_KERN_DRIVER_ONLY flag to atmel-aes, atmel-sha, atmel-tdes drivers

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Message-ID: <20250319150657.2698916-1-zli@ogga.fr>
Date: Wed, 19 Mar 2025 16:06:56 +0100
From: Zixun LI <admin@...iphile.com>
To: Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>
Cc: Zixun LI <admin@...iphile.com>,
	linux-crypto@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: atmel - add CRYPTO_ALG_KERN_DRIVER_ONLY flag to atmel-aes, atmel-sha, atmel-tdes drivers

From: Zixun LI <admin@...iphile.com>

This patch introduces the CRYPTO_ALG_KERN_DRIVER_ONLY flag to the
atmel-aes, atmel-sha, and atmel-tdes drivers. This flag is set for
hardware accelerated ciphers accessible through a kernel driver only,
which is the case of these drivers.

Signed-off-by: Zixun LI <admin@...iphile.com>
---
 drivers/crypto/atmel-aes.c  | 5 +++--
 drivers/crypto/atmel-sha.c  | 6 ++++--
 drivers/crypto/atmel-tdes.c | 3 ++-
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c
index 90dcae7049b7..8a6ee5ac9956 100644
--- a/drivers/crypto/atmel-aes.c
+++ b/drivers/crypto/atmel-aes.c
@@ -1948,7 +1948,8 @@ static struct skcipher_alg aes_xts_alg = {
 	.base.cra_driver_name	= "atmel-xts-aes",
 	.base.cra_blocksize	= AES_BLOCK_SIZE,
 	.base.cra_ctxsize	= sizeof(struct atmel_aes_xts_ctx),
-	.base.cra_flags		= CRYPTO_ALG_NEED_FALLBACK,
+	.base.cra_flags		= CRYPTO_ALG_NEED_FALLBACK |
+						  CRYPTO_ALG_KERN_DRIVER_ONLY,
 
 	.min_keysize		= 2 * AES_MIN_KEY_SIZE,
 	.max_keysize		= 2 * AES_MAX_KEY_SIZE,
@@ -2471,7 +2472,7 @@ static void atmel_aes_unregister_algs(struct atmel_aes_dev *dd)
 
 static void atmel_aes_crypto_alg_init(struct crypto_alg *alg)
 {
-	alg->cra_flags |= CRYPTO_ALG_ASYNC;
+	alg->cra_flags |= CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY;
 	alg->cra_alignmask = 0xf;
 	alg->cra_priority = ATMEL_AES_PRIORITY;
 	alg->cra_module = THIS_MODULE;
diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
index 3622120add62..40f6ed5b20ee 100644
--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -1254,7 +1254,8 @@ static int atmel_sha_cra_init(struct crypto_tfm *tfm)
 static void atmel_sha_alg_init(struct ahash_alg *alg)
 {
 	alg->halg.base.cra_priority = ATMEL_SHA_PRIORITY;
-	alg->halg.base.cra_flags = CRYPTO_ALG_ASYNC;
+	alg->halg.base.cra_flags = CRYPTO_ALG_ASYNC |
+							   CRYPTO_ALG_KERN_DRIVER_ONLY;
 	alg->halg.base.cra_ctxsize = sizeof(struct atmel_sha_ctx);
 	alg->halg.base.cra_module = THIS_MODULE;
 	alg->halg.base.cra_init = atmel_sha_cra_init;
@@ -2043,7 +2044,8 @@ static void atmel_sha_hmac_cra_exit(struct crypto_tfm *tfm)
 static void atmel_sha_hmac_alg_init(struct ahash_alg *alg)
 {
 	alg->halg.base.cra_priority = ATMEL_SHA_PRIORITY;
-	alg->halg.base.cra_flags = CRYPTO_ALG_ASYNC;
+	alg->halg.base.cra_flags = CRYPTO_ALG_ASYNC |
+							   CRYPTO_ALG_KERN_DRIVER_ONLY;
 	alg->halg.base.cra_ctxsize = sizeof(struct atmel_sha_hmac_ctx);
 	alg->halg.base.cra_module = THIS_MODULE;
 	alg->halg.base.cra_init	= atmel_sha_hmac_cra_init;
diff --git a/drivers/crypto/atmel-tdes.c b/drivers/crypto/atmel-tdes.c
index 099b32a10dd7..3a6a890172cd 100644
--- a/drivers/crypto/atmel-tdes.c
+++ b/drivers/crypto/atmel-tdes.c
@@ -898,7 +898,8 @@ static int atmel_tdes_init_tfm(struct crypto_skcipher *tfm)
 static void atmel_tdes_skcipher_alg_init(struct skcipher_alg *alg)
 {
 	alg->base.cra_priority = ATMEL_TDES_PRIORITY;
-	alg->base.cra_flags = CRYPTO_ALG_ASYNC;
+	alg->base.cra_flags = CRYPTO_ALG_ASYNC |
+						  CRYPTO_ALG_KERN_DRIVER_ONLY;
 	alg->base.cra_ctxsize = sizeof(struct atmel_tdes_ctx);
 	alg->base.cra_module = THIS_MODULE;
 
-- 
2.48.1