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charset="utf-8" Since wrapped keys are not part of the MMC specifications, it needs to be treated as a supported quirk of the MMC controller. This way, based on the quirk set during a host probe, MMC crypto can choose to register either standard or wrapped keys with block crypto profile. Signed-off-by: Seshu Madhavi Puppala --- drivers/mmc/host/cqhci-crypto.c | 23 +++++++++++++++-------- drivers/mmc/host/cqhci.h | 6 ++++++ 2 files changed, 21 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/host/cqhci-crypto.c b/drivers/mmc/host/cqhci-crypt= o.c index 91da6de1d650..c4e7ae95bc7d 100644 --- a/drivers/mmc/host/cqhci-crypto.c +++ b/drivers/mmc/host/cqhci-crypto.c @@ -91,13 +91,15 @@ static int cqhci_crypto_keyslot_program(struct blk_cryp= to_profile *profile, cfg.crypto_cap_idx =3D cap_idx; cfg.config_enable =3D CQHCI_CRYPTO_CONFIGURATION_ENABLE; =20 - if (ccap_array[cap_idx].algorithm_id =3D=3D CQHCI_CRYPTO_ALG_AES_XTS) { - /* In XTS mode, the blk_crypto_key's size is already doubled */ - memcpy(cfg.crypto_key, key->raw, key->size/2); - memcpy(cfg.crypto_key + CQHCI_CRYPTO_KEY_MAX_SIZE/2, - key->raw + key->size/2, key->size/2); - } else { - memcpy(cfg.crypto_key, key->raw, key->size); + if (key->crypto_cfg.key_type !=3D BLK_CRYPTO_KEY_TYPE_HW_WRAPPED) { + if (ccap_array[cap_idx].algorithm_id =3D=3D CQHCI_CRYPTO_ALG_AES_XTS) { + /* In XTS mode, the blk_crypto_key's size is already doubled */ + memcpy(cfg.crypto_key, key->raw, key->size/2); + memcpy(cfg.crypto_key + CQHCI_CRYPTO_KEY_MAX_SIZE/2, + key->raw + key->size/2, key->size/2); + } else { + memcpy(cfg.crypto_key, key->raw, key->size); + } } =20 err =3D cqhci_crypto_program_key(cq_host, key, &cfg, slot); @@ -211,7 +213,12 @@ int cqhci_crypto_init(struct cqhci_host *cq_host) /* Unfortunately, CQHCI crypto only supports 32 DUN bits. */ profile->max_dun_bytes_supported =3D 4; =20 - profile->key_types_supported =3D BLK_CRYPTO_KEY_TYPE_STANDARD; + if (cq_host->quirks & CQHCI_QUIRK_USES_WRAPPED_CRYPTO_KEYS) + profile->key_types_supported =3D + BLK_CRYPTO_KEY_TYPE_HW_WRAPPED; + else + profile->key_types_supported =3D + BLK_CRYPTO_KEY_TYPE_STANDARD; =20 /* * Cache all the crypto capabilities and advertise the supported crypto diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h index 06099fd32f23..f6bc66bc6418 100644 --- a/drivers/mmc/host/cqhci.h +++ b/drivers/mmc/host/cqhci.h @@ -241,6 +241,12 @@ struct cqhci_host { u32 quirks; #define CQHCI_QUIRK_SHORT_TXFR_DESC_SZ 0x1 =20 + /* + * This quirk indicates that EMMC will be using HW wrapped keys + * when using inline encryption. + */ +#define CQHCI_QUIRK_USES_WRAPPED_CRYPTO_KEYS 0x2 + bool enabled; 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charset="utf-8" Block crypto allows storage controllers like MMC to register an op derive a software secret from wrapped keys added to the kernel. Wrapped keys in most cases will have vendor specific implementations, which means this op would need to have a corresponding MMC variant op. This change adds hooks in MMC to support this variant ops and tie them to the blk crypto op. Signed-off-by: Seshu Madhavi Puppala --- drivers/mmc/host/cqhci-crypto.c | 14 ++++++++++++++ drivers/mmc/host/cqhci.h | 5 +++++ 2 files changed, 19 insertions(+) diff --git a/drivers/mmc/host/cqhci-crypto.c b/drivers/mmc/host/cqhci-crypt= o.c index c4e7ae95bc7d..e2a4700f3153 100644 --- a/drivers/mmc/host/cqhci-crypto.c +++ b/drivers/mmc/host/cqhci-crypto.c @@ -128,6 +128,19 @@ static int cqhci_crypto_keyslot_evict(struct blk_crypt= o_profile *profile, return cqhci_crypto_clear_keyslot(cq_host, slot); } =20 +static int cqhci_crypto_derive_sw_secret(struct blk_crypto_profile *profil= e, + const u8 wkey[], size_t wkey_size, + u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]) +{ + struct cqhci_host *cq_host =3D cqhci_host_from_crypto_profile(profile); + + if (cq_host->ops && cq_host->ops->derive_sw_secret) + return cq_host->ops->derive_sw_secret(cq_host, wkey, wkey_size, + sw_secret); + + return -EOPNOTSUPP; +} + /* * The keyslot management operations for CQHCI crypto. * @@ -139,6 +152,7 @@ static int cqhci_crypto_keyslot_evict(struct blk_crypto= _profile *profile, static const struct blk_crypto_ll_ops cqhci_crypto_ops =3D { .keyslot_program =3D cqhci_crypto_keyslot_program, .keyslot_evict =3D cqhci_crypto_keyslot_evict, + .derive_sw_secret =3D cqhci_crypto_derive_sw_secret, }; 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charset="utf-8" Block crypto allows storage controllers like MMC to register ops to generate, prepare and import wrapped keys in the kernel. Wrapped keys in most cases will have vendor specific implementations, which means these ops would need to have corresponding MMC variant ops. Signed-off-by: Seshu Madhavi Puppala --- drivers/mmc/host/cqhci-crypto.c | 42 +++++++++++++++++++++++++++++++++ drivers/mmc/host/cqhci.h | 11 +++++++++ 2 files changed, 53 insertions(+) diff --git a/drivers/mmc/host/cqhci-crypto.c b/drivers/mmc/host/cqhci-crypt= o.c index e2a4700f3153..4a05f5a5d92c 100644 --- a/drivers/mmc/host/cqhci-crypto.c +++ b/drivers/mmc/host/cqhci-crypto.c @@ -141,6 +141,45 @@ static int cqhci_crypto_derive_sw_secret(struct blk_cr= ypto_profile *profile, return -EOPNOTSUPP; } =20 +static int cqhci_crypto_generate_key(struct blk_crypto_profile *profile, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct cqhci_host *cq_host =3D cqhci_host_from_crypto_profile(profile); + + if (cq_host->ops && cq_host->ops->generate_key) + return cq_host->ops->generate_key(cq_host, lt_key); + + return -EOPNOTSUPP; +} + +static int cqhci_crypto_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 cqhci_host *cq_host =3D cqhci_host_from_crypto_profile(profile); + + if (cq_host->ops && cq_host->ops->prepare_key) + return cq_host->ops->prepare_key(cq_host, lt_key, + lt_key_size, eph_key); + + return -EOPNOTSUPP; +} + +static int cqhci_crypto_import_key(struct blk_crypto_profile *profile, + const u8 *imp_key, size_t imp_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + + struct cqhci_host *cq_host =3D cqhci_host_from_crypto_profile(profile); + + if (cq_host->ops && cq_host->ops->import_key) + return cq_host->ops->import_key(cq_host, imp_key, + imp_key_size, lt_key); + + return -EOPNOTSUPP; +} + /* * The keyslot management operations for CQHCI crypto. * @@ -153,6 +192,9 @@ static const struct blk_crypto_ll_ops cqhci_crypto_ops = =3D { .keyslot_program =3D cqhci_crypto_keyslot_program, .keyslot_evict =3D cqhci_crypto_keyslot_evict, .derive_sw_secret =3D cqhci_crypto_derive_sw_secret, + .generate_key =3D cqhci_crypto_generate_key, + .prepare_key =3D cqhci_crypto_prepare_key, + .import_key =3D cqhci_crypto_import_key, }; =20 static enum blk_crypto_mode_num diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h index 77368fb97eba..f2af8aaa4068 100644 --- a/drivers/mmc/host/cqhci.h +++ b/drivers/mmc/host/cqhci.h @@ -287,6 +287,9 @@ struct cqhci_host { }; =20 /* @derive_sw_secret: derive sw secret from a wrapped key + * @generate_key: generate a storage key and return longterm wrapped key + * @prepare_key: unwrap longterm key and return ephemeral wrapped key + * @import_key: import sw storage key and return longterm wrapped key */ struct cqhci_host_ops { void (*dumpregs)(struct mmc_host *mmc); @@ -305,6 +308,14 @@ struct cqhci_host_ops { int (*derive_sw_secret)(struct cqhci_host *cq_host, const u8 wkey[], unsigned int wkey_size, u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]); + int (*generate_key)(struct cqhci_host *cq_host, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); + int (*prepare_key)(struct cqhci_host *cq_host, + const u8 *lt_key, size_t lt_key_size, + u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); + int (*import_key)(struct cqhci_host *cq_host, const u8 *imp_key, + size_t imp_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); #endif void (*set_tran_desc)(struct cqhci_host *cq_host, u8 **desc, dma_addr_t addr, int len, bool end, bool dma64); 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charset="utf-8" Use the wrapped keys quirk when hwkm is supported/used. Whether to use HWKM or not would be decided during an ICE probe, and based on this information, MMC can decide to use wrapped keys or standard keys. Also, propagate the appropriate key size to the ICE driver when wrapped keys are used. Signed-off-by: Seshu Madhavi Puppala --- drivers/mmc/host/sdhci-msm.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index 0f2ce93f85cc..f031a4dbc719 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -1834,6 +1834,9 @@ static int sdhci_msm_ice_init(struct sdhci_msm_host *= msm_host, msm_host->ice =3D ice; mmc->caps2 |=3D MMC_CAP2_CRYPTO; =20 + if (qcom_ice_hwkm_supported(msm_host->ice)) + cq_host->quirks |=3D CQHCI_QUIRK_USES_WRAPPED_CRYPTO_KEYS; + return 0; } =20 @@ -1880,7 +1883,11 @@ static int sdhci_msm_program_key(struct cqhci_host *= cq_host, cap.key_size !=3D CQHCI_CRYPTO_KEY_SIZE_256) return -EINVAL; =20 - ice_key_size =3D QCOM_ICE_CRYPTO_KEY_SIZE_256; + if (bkey->crypto_cfg.key_type =3D=3D BLK_CRYPTO_KEY_TYPE_HW_WRAPPED) + ice_key_size =3D QCOM_ICE_CRYPTO_KEY_SIZE_WRAPPED; + else + ice_key_size =3D QCOM_ICE_CRYPTO_KEY_SIZE_256; + if (cfg->config_enable & CQHCI_CRYPTO_CONFIGURATION_ENABLE) return qcom_ice_program_key(msm_host->ice, QCOM_ICE_CRYPTO_ALG_AES_XTS, --=20 2.17.1 From nobody Sun Nov 24 23:46:23 2024 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 8BA3413C83D; 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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 From nobody Sun Nov 24 23:46:23 2024 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 AE5C213C9A4; 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charset="utf-8" MMC defines variant ops to support generate, prepare and import wrapped key blk crypto ops to tie these operations to vendor specific implementations. This patch defines and implements these variant ops for Qualcomm SoCs which uses eMMC storage. Signed-off-by: Seshu Madhavi Puppala --- drivers/mmc/host/sdhci-msm.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index aba1d6e688b6..9b3090c1f917 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -1912,6 +1912,37 @@ static int sdhci_msm_ice_derive_sw_secret(struct cqh= ci_host *cq_host, const u8 w return qcom_ice_derive_sw_secret(msm_host->ice, wkey, wkey_size, sw_secre= t); } =20 +static int sdhci_msm_generate_key(struct cqhci_host *cq_host, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_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_generate_key(msm_host->ice, lt_key); +} + +static int sdhci_msm_prepare_key(struct cqhci_host *cq_host, + const u8 *lt_key, size_t lt_key_size, + u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_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_prepare_key(msm_host->ice, lt_key, lt_key_size, eph_key); +} + +static int sdhci_msm_import_key(struct cqhci_host *cq_host, + const u8 *imp_key, size_t imp_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_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_import_key(msm_host->ice, imp_key, imp_key_size, lt_key); +} #else /* CONFIG_MMC_CRYPTO */ =20 static inline int sdhci_msm_ice_init(struct sdhci_msm_host *msm_host, @@ -2019,6 +2050,9 @@ static const struct cqhci_host_ops sdhci_msm_cqhci_op= s =3D { #ifdef CONFIG_MMC_CRYPTO .program_key =3D sdhci_msm_program_key, .derive_sw_secret =3D sdhci_msm_ice_derive_sw_secret, + .generate_key =3D sdhci_msm_generate_key, + .prepare_key =3D sdhci_msm_prepare_key, + .import_key =3D sdhci_msm_import_key, #endif }; =20 --=20 2.17.1