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Fri, 01 Nov 2024 03:15:41 +0000 Received: from APBLRPPMTA02.qualcomm.com (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 4A13FeNE010587; Fri, 1 Nov 2024 03:15:41 GMT Received: from hu-maiyas-hyd.qualcomm.com (hu-spuppala-hyd.qualcomm.com [10.213.108.54]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 4A13FfVR010628; Fri, 01 Nov 2024 03:15:41 +0000 Received: by hu-maiyas-hyd.qualcomm.com (Postfix, from userid 4137148) id 86991500922; Fri, 1 Nov 2024 08:45:39 +0530 (+0530) From: Seshu Madhavi Puppala To: Adrian Hunter , Asutosh Das , Ulf Hansson Cc: Ritesh Harjani , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, quic_gaurkash@quicinc.com, quic_neersoni@quicinc.com, quic_spuppala@quicinc.com Subject: [PATCH RFC 5/6] mmc: host: implement derive sw secret vop in mmc qcom Date: Fri, 1 Nov 2024 08:45:38 +0530 Message-Id: <20241101031539.13285-6-quic_spuppala@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20241101031539.13285-1-quic_spuppala@quicinc.com> References: <20241101031539.13285-1-quic_spuppala@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: E6qh5HOpKUXt6sS4s-yC28VEZpKy1Q2u X-Proofpoint-GUID: E6qh5HOpKUXt6sS4s-yC28VEZpKy1Q2u X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 spamscore=0 lowpriorityscore=0 impostorscore=0 phishscore=0 mlxlogscore=982 priorityscore=1501 mlxscore=0 malwarescore=0 bulkscore=0 suspectscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411010022 Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MMC defines a variant op to tie the corresponding derive software secret blk crypto op to the vendor specific implementation of wrapped keys. This patch implements this variant op. Signed-off-by: Seshu Madhavi Puppala --- drivers/mmc/host/sdhci-msm.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index f031a4dbc719..aba1d6e688b6 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -1897,6 +1897,21 @@ static int sdhci_msm_program_key(struct cqhci_host *cq_host, return qcom_ice_evict_key(msm_host->ice, slot); } +/* + * Derive a software secret from a hardware wrapped key. The key is unwrapped in + * hardware from trustzone and a software key/secret is then derived from it. + */ +static int sdhci_msm_ice_derive_sw_secret(struct cqhci_host *cq_host, const u8 wkey[], + unsigned int wkey_size, + u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]) +{ + struct sdhci_host *host = mmc_priv(cq_host->mmc); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + return qcom_ice_derive_sw_secret(msm_host->ice, wkey, wkey_size, sw_secret); +} + #else /* CONFIG_MMC_CRYPTO */ static inline int sdhci_msm_ice_init(struct sdhci_msm_host *msm_host, @@ -2003,6 +2018,7 @@ static const struct cqhci_host_ops sdhci_msm_cqhci_ops = { .disable = sdhci_msm_cqe_disable, #ifdef CONFIG_MMC_CRYPTO .program_key = sdhci_msm_program_key, + .derive_sw_secret = sdhci_msm_ice_derive_sw_secret, #endif };