From patchwork Mon Dec 9 04:55:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 13898878 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7F0FE19CC11; Mon, 9 Dec 2024 04:57:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733720227; cv=none; b=M1Ymw3tWDFT1Qk9boYAABY7vTtyu9qRX92C5Hp0TPi5uzJI4Sz55oysjWXnaMwoq6gsTwLqW92ZlwB03eDiaXp8idBlLlJ05SrUGTeL977giPWg7Us6oywIFIbkDloI33/D8+7PoDpT+37I2c2IsDqQzGsaTVf1IjkluhoFWCXQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733720227; c=relaxed/simple; bh=h4J36v6CLWXCLcu3mJF/vTOs8+nN5GQZcSNjUHzexkA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pscRwl8EF6xIWJOBdNkZE8zxJWV/VPyCC9N2ow61cmGHUefZfgkiQkd1vR5TPHATZs43sq47mcCMkSLK6k7+EBELq4FzrtPd9uc4ZKdhlC/S3fnVlaoTSIDDeQ426kdwXNiBfj/nLmgQpUldRhCKkv+NdqQ4WTFHjcVn/77O5As= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EsVg4WV7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EsVg4WV7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB295C4CEE3; Mon, 9 Dec 2024 04:57:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733720227; bh=h4J36v6CLWXCLcu3mJF/vTOs8+nN5GQZcSNjUHzexkA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EsVg4WV7pnb8yQv8ULijDaularEr2tiKgsouk7jcjVdb/6wN0CwQZCiUulQ/fBM/m 7eQ367e2knT36veRWFRerBtiD30EfaqqSobTH81dKKbfXFJYxrqRJ6npq+AzPajQab he1T0x1z6/WFaDssIqUOqbcmGAnzgtsdVuD31PI2lkwvTcA+v6kIzVy/14oIQQXhl2 3ph4/8XvU0r50t7dcGrdcmKXVayBPu2tkFhjmHbG/QtBDRjLdfKDw2YdcbdU/fbbD8 v1MTXwDFlKR6g0wysihgn2nrmcRAQN344wsfde738Ms7//nH0NoC482ob3zAmLd5Xz HRFTijVn+WPdQ== From: Eric Biggers To: linux-block@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org, Bartosz Golaszewski , Gaurav Kashyap Cc: Adrian Hunter , Alim Akhtar , Avri Altman , Bart Van Assche , Bjorn Andersson , Dmitry Baryshkov , "James E . J . Bottomley" , Jens Axboe , Konrad Dybcio , Manivannan Sadhasivam , "Martin K . Petersen" , Ulf Hansson Subject: [PATCH v9 12/12] ufs: qcom: add support for wrapped keys Date: Sun, 8 Dec 2024 20:55:30 -0800 Message-ID: <20241209045530.507833-13-ebiggers@kernel.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241209045530.507833-1-ebiggers@kernel.org> References: <20241209045530.507833-1-ebiggers@kernel.org> Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Eric Biggers Wire up the wrapped key support for ufs-qcom by implementing the needed methods in struct blk_crypto_ll_ops and setting the appropriate flags in blk_crypto_profile::key_types_supported. For more information about this feature and how to use it, refer to the sections about hardware-wrapped keys in Documentation/block/inline-encryption.rst and Documentation/filesystems/fscrypt.rst. Based on patches by Gaurav Kashyap . Reworked to use the custom crypto profile support. Signed-off-by: Eric Biggers --- drivers/ufs/host/ufs-qcom.c | 54 ++++++++++++++++++++++++++++++++----- 1 file changed, 48 insertions(+), 6 deletions(-) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index c2fd025d04384..ee11f4b49807e 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -132,15 +132,10 @@ static int ufs_qcom_ice_init(struct ufs_qcom_host *host) } if (IS_ERR_OR_NULL(ice)) return PTR_ERR_OR_ZERO(ice); - if (qcom_ice_using_hwkm(ice)) { - dev_warn(dev, "HWKM mode unsupported; disabling inline encryption support\n"); - return 0; - } - host->ice = ice; /* Initialize the blk_crypto_profile */ caps.reg_val = cpu_to_le32(ufshcd_readl(hba, REG_UFS_CCAP)); @@ -151,11 +146,14 @@ static int ufs_qcom_ice_init(struct ufs_qcom_host *host) if (err) return err; profile->ll_ops = ufs_qcom_crypto_ops; profile->max_dun_bytes_supported = 8; - profile->key_types_supported = BLK_CRYPTO_KEY_TYPE_RAW; + if (qcom_ice_using_hwkm(ice)) + profile->key_types_supported = BLK_CRYPTO_KEY_TYPE_HW_WRAPPED; + else + profile->key_types_supported = BLK_CRYPTO_KEY_TYPE_RAW; profile->dev = dev; /* * Currently this driver only supports AES-256-XTS. All known versions * of ICE support it, but to be safe make sure it is really declared in @@ -219,13 +217,57 @@ static int ufs_qcom_ice_keyslot_evict(struct blk_crypto_profile *profile, err = qcom_ice_evict_key(host->ice, slot); ufshcd_release(hba); return err; } +static int ufs_qcom_ice_derive_sw_secret(struct blk_crypto_profile *profile, + const u8 *eph_key, size_t eph_key_size, + u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]) +{ + struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile); + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + + return qcom_ice_derive_sw_secret(host->ice, eph_key, eph_key_size, + sw_secret); +} + +static int ufs_qcom_ice_import_key(struct blk_crypto_profile *profile, + const u8 *raw_key, size_t raw_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile); + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + + return qcom_ice_import_key(host->ice, raw_key, raw_key_size, lt_key); +} + +static int ufs_qcom_ice_generate_key(struct blk_crypto_profile *profile, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile); + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + + return qcom_ice_generate_key(host->ice, lt_key); +} + +static int ufs_qcom_ice_prepare_key(struct blk_crypto_profile *profile, + const u8 *lt_key, size_t lt_key_size, + u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile); + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + + return qcom_ice_prepare_key(host->ice, lt_key, lt_key_size, eph_key); +} + static const struct blk_crypto_ll_ops ufs_qcom_crypto_ops = { .keyslot_program = ufs_qcom_ice_keyslot_program, .keyslot_evict = ufs_qcom_ice_keyslot_evict, + .derive_sw_secret = ufs_qcom_ice_derive_sw_secret, + .import_key = ufs_qcom_ice_import_key, + .generate_key = ufs_qcom_ice_generate_key, + .prepare_key = ufs_qcom_ice_prepare_key, }; #else static inline void ufs_qcom_ice_enable(struct ufs_qcom_host *host)