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charset="utf-8" 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); } =20 +/* + * Derive a software secret from a hardware wrapped key. The key is unwrap= ped 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, cons= t u8 wkey[], + unsigned int wkey_size, + u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]) +{ + struct sdhci_host *host =3D mmc_priv(cq_host->mmc); + struct sdhci_pltfm_host *pltfm_host =3D sdhci_priv(host); + struct sdhci_msm_host *msm_host =3D sdhci_pltfm_priv(pltfm_host); + + return qcom_ice_derive_sw_secret(msm_host->ice, wkey, wkey_size, sw_secre= t); +} + #else /* CONFIG_MMC_CRYPTO */ =20 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_op= s =3D { .disable =3D sdhci_msm_cqe_disable, #ifdef CONFIG_MMC_CRYPTO .program_key =3D sdhci_msm_program_key, + .derive_sw_secret =3D sdhci_msm_ice_derive_sw_secret, #endif }; =20 --=20 2.17.1