Re: [PATCH] crypto: qce - fix priority to be less than ARMv8 CE

[Bartosz Golaszewski]

On Tue, Dec 3, 2024 at 7:06 PM Eric Biggers <ebiggers@xxxxxxxxxx> wrote:
>
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
>
> As QCE is an order of magnitude slower than the ARMv8 Crypto Extensions
> on the CPU, and is also less well tested, give it a lower priority.
> Previously the QCE SHA algorithms had higher priority than the ARMv8 CE
> equivalents, and the ciphers such as AES-XTS had the same priority which
> meant the QCE versions were chosen if they happened to be loaded later.
>
> Fixes: ec8f5d8f6f76 ("crypto: qce - Qualcomm crypto engine driver")
> Cc: stable@xxxxxxxxxxxxxxx
> Cc: Bartosz Golaszewski <brgl@xxxxxxxx>
> Cc: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
> Cc: Thara Gopinath <thara.gopinath@xxxxxxxxx>
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
> ---
>  drivers/crypto/qce/aead.c     | 2 +-
>  drivers/crypto/qce/sha.c      | 2 +-
>  drivers/crypto/qce/skcipher.c | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/crypto/qce/aead.c b/drivers/crypto/qce/aead.c
> index 7d811728f047..97b56e92ea33 100644
> --- a/drivers/crypto/qce/aead.c
> +++ b/drivers/crypto/qce/aead.c
> @@ -784,11 +784,11 @@ static int qce_aead_register_one(const struct qce_aead_def *def, struct qce_devi
>         alg->encrypt                    = qce_aead_encrypt;
>         alg->decrypt                    = qce_aead_decrypt;
>         alg->init                       = qce_aead_init;
>         alg->exit                       = qce_aead_exit;
>
> -       alg->base.cra_priority          = 300;
> +       alg->base.cra_priority          = 275;
>         alg->base.cra_flags             = CRYPTO_ALG_ASYNC |
>                                           CRYPTO_ALG_ALLOCATES_MEMORY |
>                                           CRYPTO_ALG_KERN_DRIVER_ONLY |
>                                           CRYPTO_ALG_NEED_FALLBACK;
>         alg->base.cra_ctxsize           = sizeof(struct qce_aead_ctx);
> diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c
> index fc72af8aa9a7..71b748183cfa 100644
> --- a/drivers/crypto/qce/sha.c
> +++ b/drivers/crypto/qce/sha.c
> @@ -480,11 +480,11 @@ static int qce_ahash_register_one(const struct qce_ahash_def *def,
>         else if (IS_SHA256(def->flags))
>                 tmpl->hash_zero = sha256_zero_message_hash;
>
>         base = &alg->halg.base;
>         base->cra_blocksize = def->blocksize;
> -       base->cra_priority = 300;
> +       base->cra_priority = 175;
>         base->cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY;
>         base->cra_ctxsize = sizeof(struct qce_sha_ctx);
>         base->cra_alignmask = 0;
>         base->cra_module = THIS_MODULE;
>         base->cra_init = qce_ahash_cra_init;
> diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c
> index 5b493fdc1e74..ffb334eb5b34 100644
> --- a/drivers/crypto/qce/skcipher.c
> +++ b/drivers/crypto/qce/skcipher.c
> @@ -459,11 +459,11 @@ static int qce_skcipher_register_one(const struct qce_skcipher_def *def,
>                                           IS_DES(def->flags) ? qce_des_setkey :
>                                           qce_skcipher_setkey;
>         alg->encrypt                    = qce_skcipher_encrypt;
>         alg->decrypt                    = qce_skcipher_decrypt;
>
> -       alg->base.cra_priority          = 300;
> +       alg->base.cra_priority          = 275;
>         alg->base.cra_flags             = CRYPTO_ALG_ASYNC |
>                                           CRYPTO_ALG_ALLOCATES_MEMORY |
>                                           CRYPTO_ALG_KERN_DRIVER_ONLY;
>         alg->base.cra_ctxsize           = sizeof(struct qce_cipher_ctx);
>         alg->base.cra_alignmask         = 0;
>
> base-commit: ceb8bf2ceaa77fe222fe8fe32cb7789c9099ddf1
> --
> 2.47.1
>

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>

But the QCE driver will still be worked on due to features that we
want to support that the CE don't have.

Bart