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Signed-off-by: Kuldeep Singh --- drivers/tee/qcomtee/call.c | 4 +++- drivers/tee/qcomtee/qcomtee_msg.h | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/tee/qcomtee/call.c b/drivers/tee/qcomtee/call.c index 4212572ff54b..aca4e8c6e37b 100644 --- a/drivers/tee/qcomtee/call.c +++ b/drivers/tee/qcomtee/call.c @@ -753,7 +753,9 @@ static const uuid_t qtee_service_uuid_ns =3D UUID_INIT(= 0xe1b48857, 0x6154, 0x49f9, =20 static const struct qtee_service qtee_services[] =3D { { "qcom.tz.uefisecapp", - QCOMTEE_UEFI_SEC_UID } + QCOMTEE_UEFI_SEC_UID }, + { "qcom.tz.tpm", + QCOMTEE_TPM_UID } }; =20 static void qtee_release_service(struct device *dev) diff --git a/drivers/tee/qcomtee/qcomtee_msg.h b/drivers/tee/qcomtee/qcomte= e_msg.h index ecaf8db67d45..888611b801c8 100644 --- a/drivers/tee/qcomtee/qcomtee_msg.h +++ b/drivers/tee/qcomtee/qcomtee_msg.h @@ -106,6 +106,8 @@ union qcomtee_msg_arg { #define QTEE_VERSION_GET_PATCH(x) ((x) >> 0 & 0xfffU) =20 #define QCOMTEE_UEFI_SEC_UID 413 +#define QCOMTEE_TPM_UID 489 + /* Response types as returned from qcomtee_object_invoke_ctx_invoke(). */ =20 /* The message contains a callback request. */ --=20 2.34.1 From nobody Sat Sep 26 19:35:38 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 38B853E0C4D for ; 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The driver discovers the qcom.tz.tpm TEE-bus device, opens a session with the TPM TA, and register with tpm interface. This exposes the TA through the standard /dev/tpm interface and the existing tpm2 command layer. OS need not be aware underlying TPM instance is dTPM or fTPM. Signed-off-by: Kuldeep Singh --- MAINTAINERS | 7 + drivers/char/tpm/Kconfig | 9 ++ drivers/char/tpm/Makefile | 1 + drivers/char/tpm/tpm_qcom.c | 371 ++++++++++++++++++++++++++++++++++++++++= ++++ drivers/char/tpm/tpm_qcom.h | 82 ++++++++++ 5 files changed, 470 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 47b04968e79a..cfa5b66823c7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -22636,6 +22636,13 @@ S: Maintained F: Documentation/tee/qtee.rst F: drivers/tee/qcomtee/ =20 +QUALCOMM TPM DRIVER +M: Kuldeep Singh +L: linux-arm-msm@vger.kernel.org +S: Maintained +F: drivers/char/tpm/tpm_qcom.c +F: drivers/char/tpm/tpm_qcom.h + QUALCOMM TRUST ZONE MEMORY ALLOCATOR M: Bartosz Golaszewski L: linux-arm-msm@vger.kernel.org diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig index 5f672f2c01b0..05d704ed3632 100644 --- a/drivers/char/tpm/Kconfig +++ b/drivers/char/tpm/Kconfig @@ -243,6 +243,15 @@ config TCG_FTPM_TEE help This driver proxies for firmware TPM running in TEE. =20 +config TCG_QCOM + tristate "Qualcomm TEE based TPM Interface" + depends on QCOMTEE + help + This driver provides interface to run TPM instances with Trustzone + having Qualcomm TPM TA running in Qualcomm TEE. + The mechanism uses the object-IPC based transport provided by + QCOMTEE. + config TCG_SVSM tristate "SNP SVSM vTPM interface" depends on AMD_MEM_ENCRYPT diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile index 5b5cdc0d32e4..471cbf49afd2 100644 --- a/drivers/char/tpm/Makefile +++ b/drivers/char/tpm/Makefile @@ -45,5 +45,6 @@ obj-$(CONFIG_TCG_CRB) +=3D tpm_crb.o obj-$(CONFIG_TCG_ARM_CRB_FFA) +=3D tpm_crb_ffa.o obj-$(CONFIG_TCG_VTPM_PROXY) +=3D tpm_vtpm_proxy.o obj-$(CONFIG_TCG_FTPM_TEE) +=3D tpm_ftpm_tee.o +obj-$(CONFIG_TCG_QCOM) +=3D tpm_qcom.o obj-$(CONFIG_TCG_SVSM) +=3D tpm_svsm.o obj-$(CONFIG_TCG_LOONGSON) +=3D tpm_loongson.o diff --git a/drivers/char/tpm/tpm_qcom.c b/drivers/char/tpm/tpm_qcom.c new file mode 100644 index 000000000000..00ee61204056 --- /dev/null +++ b/drivers/char/tpm/tpm_qcom.c @@ -0,0 +1,371 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + * + */ + +#include +#include +#include +#include +#include +#include + +#include "tpm.h" +#include "tpm_qcom.h" + +/* UUID of the QTEE-bus device representing the TPM TA. */ +static const uuid_t tpm_qcom_uuid =3D + UUID_INIT(0xaabcb593, 0x7083, 0x5536, + 0xac, 0x27, 0x3d, 0x2d, 0x89, 0x41, 0x9d, 0xdb); + +static void tpm_qcom_release_object(struct tee_context *ctx, + struct tee_param_objref object) +{ + struct tee_ioctl_object_invoke_arg inv_arg; + + memset(&inv_arg, 0, sizeof(inv_arg)); + inv_arg.id =3D object.id; + inv_arg.op =3D QCOMTEE_MSG_OBJECT_OP_RELEASE; + inv_arg.num_params =3D 0; + + tee_client_object_invoke_func(ctx, &inv_arg, NULL); +} + +static int tpm_qcom_get_client_env_obj(struct tee_context *ctx, + struct tee_param_objref *client_env_obj) +{ + int ret; + struct tee_ioctl_object_invoke_arg inv_arg; + struct tee_param param[2]; + + memset(&inv_arg, 0, sizeof(inv_arg)); + memset(¶m, 0, sizeof(param)); + + inv_arg.id =3D TEE_OBJREF_NULL; + inv_arg.op =3D QCOMTEE_ROOT_OP_REG_WITH_CREDENTIALS; + inv_arg.num_params =3D 2; + + param[0].attr =3D TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF_INPUT; + param[0].u.objref.id =3D TEE_OBJREF_NULL; + param[1].attr =3D TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF_OUTPUT; + + ret =3D tee_client_object_invoke_func(ctx, &inv_arg, param); + if (ret < 0 || inv_arg.ret !=3D 0) + return ret ?: inv_arg.ret; + + *client_env_obj =3D param[1].u.objref; + return ret; +} + +static int tpm_qcom_get_svc_obj(struct tee_context *ctx, + struct tee_param_objref client_env_obj, + struct tee_param_objref *tpm_svc_obj) +{ + int ret; + struct tee_ioctl_object_invoke_arg inv_arg; + struct tee_param param[2]; + u32 tpm_uid =3D QCOMTEE_TPM_UID; + + memset(&inv_arg, 0, sizeof(inv_arg)); + memset(¶m, 0, sizeof(param)); + + inv_arg.id =3D client_env_obj.id; + inv_arg.op =3D QCOMTEE_OP_CLIENT_ENV_OPEN; + inv_arg.num_params =3D 2; + + param[0].attr =3D TEE_IOCTL_PARAM_ATTR_TYPE_UBUF_INPUT; + param[0].u.ubuf =3D (struct tee_param_ubuf){ .addr =3D &tpm_uid, + .size =3D sizeof(tpm_uid) }; + param[1].attr =3D TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF_OUTPUT; + + ret =3D tee_client_object_invoke_func(ctx, &inv_arg, param); + if (ret < 0 || inv_arg.ret !=3D 0) + return ret ?: inv_arg.ret; + + *tpm_svc_obj =3D param[1].u.objref; + return ret; +} + +static int tpm_qcom_send_command(struct tpm_qcom_private *pvt_data, + void *req, size_t req_len, + void *rsp, size_t *rsp_len) +{ + int ret; + struct tee_ioctl_object_invoke_arg inv_arg; + struct tee_param param[2]; + + memset(&inv_arg, 0, sizeof(inv_arg)); + memset(¶m, 0, sizeof(param)); + + inv_arg.id =3D pvt_data->tpm_svc_obj.id; + inv_arg.op =3D QCOMTEE_TPM_OP_SEND_COMMAND; + inv_arg.num_params =3D 2; + + param[0].attr =3D TEE_IOCTL_PARAM_ATTR_TYPE_UBUF_INPUT; + param[0].u.ubuf =3D (struct tee_param_ubuf){ .addr =3D req, .size =3D req= _len }; + param[1].attr =3D TEE_IOCTL_PARAM_ATTR_TYPE_UBUF_OUTPUT; + param[1].u.ubuf =3D (struct tee_param_ubuf){ .addr =3D rsp, .size =3D *rs= p_len }; + + print_hex_dump_debug("tpm_qcom req: ", DUMP_PREFIX_OFFSET, + 16, 1, req, req_len, true); + + ret =3D tee_client_object_invoke_func(pvt_data->ctx, &inv_arg, param); + if (ret < 0 || inv_arg.ret !=3D 0) { + dev_err(pvt_data->dev, + "send_command invoke ret: %d, err: 0x%x\n", + ret, inv_arg.ret); + return ret ?: inv_arg.ret; + } + + *rsp_len =3D param[1].u.ubuf.size; + + print_hex_dump_debug("tpm_qcom rsp: ", DUMP_PREFIX_OFFSET, + 16, 1, rsp, *rsp_len, true); + + return ret; +} + +static int tpm_qcom_get_ta_details(struct tpm_qcom_private *pvt_data) +{ + struct tpm_qcom_ta_version_req ver_req =3D { + .command_id =3D QCOMTEE_TPM_GET_TA_VERSION_ID, + }; + struct tpm_qcom_ta_version_rsp ver_rsp; + size_t ver_rsp_len =3D sizeof(ver_rsp); + struct tpm_qcom_type_req type_req =3D { + .command_id =3D QCOMTEE_TPM_TYPE_ID, + }; + struct tpm_qcom_type_rsp type_rsp; + size_t type_rsp_len =3D sizeof(type_rsp); + int ret; + + ret =3D tpm_qcom_send_command(pvt_data, &ver_req, sizeof(ver_req), + &ver_rsp, &ver_rsp_len); + if (ret || ver_rsp_len < sizeof(ver_rsp) || ver_rsp.status !=3D 0) { + dev_err(pvt_data->dev, + "failed to query TA version: ret=3D%d, status=3D%u\n", + ret, ret ? 0 : ver_rsp.status); + return ret ?: -EIO; + } + + dev_info(pvt_data->dev, "TPM TA version %u.%u\n", + QCOMTEE_TPM_TA_VERSION_GET_MAJOR(ver_rsp.version_num), + QCOMTEE_TPM_TA_VERSION_GET_MINOR(ver_rsp.version_num)); + + ret =3D tpm_qcom_send_command(pvt_data, &type_req, sizeof(type_req), + &type_rsp, &type_rsp_len); + if (ret || type_rsp_len < sizeof(type_rsp) || type_rsp.status !=3D 0) { + dev_err(pvt_data->dev, + "failed to query TPM type: ret=3D%d, status=3D%u\n", + ret, ret ? 0 : type_rsp.status); + return ret ?: -EIO; + } + + switch (type_rsp.tpm_type) { + case QCOMTEE_TPM_TYPE_FTPM: + dev_info(pvt_data->dev, "TPM type: fTPM\n"); + pvt_data->is_dtpm =3D false; + break; + case QCOMTEE_TPM_TYPE_DTPM: + dev_info(pvt_data->dev, "TPM type: dTPM\n"); + pvt_data->is_dtpm =3D true; + break; + default: + dev_err(pvt_data->dev, "unsupported TPM type: 0x%08x\n", + type_rsp.tpm_type); + return -EIO; + } + + return 0; +} + +/* + * fTPM does not implement this command, so this is only ever called in ca= se of + * dtpm only. + */ +static void tpm_qcom_transfer(struct tpm_qcom_private *pvt_data, + u32 transfer_state) +{ + struct tpm_qcom_transfer_req req =3D { + .command_id =3D QCOMTEE_TPM_TRANSFER_ID, + .transfer_state =3D transfer_state, + }; + struct tpm_qcom_transfer_rsp rsp; + size_t rsp_len =3D sizeof(rsp); + int ret; + + ret =3D tpm_qcom_send_command(pvt_data, &req, sizeof(req), &rsp, &rsp_len= ); + if (ret || rsp_len < sizeof(rsp) || rsp.status !=3D 0) + dev_warn(pvt_data->dev, + "transfer state=3D%u hint failed: ret=3D%d, status=3D%u\n", + transfer_state, ret, ret ? 0 : rsp.status); +} + +static int tpm_qcom_cmd_ready(struct tpm_chip *chip) +{ + struct tpm_qcom_private *pvt_data =3D dev_get_drvdata(chip->dev.parent); + + if (pvt_data->is_dtpm) + tpm_qcom_transfer(pvt_data, QCOMTEE_TPM_TRANSFER_START); + + return 0; +} + +static int tpm_qcom_go_idle(struct tpm_chip *chip) +{ + struct tpm_qcom_private *pvt_data =3D dev_get_drvdata(chip->dev.parent); + + if (pvt_data->is_dtpm) + tpm_qcom_transfer(pvt_data, QCOMTEE_TPM_TRANSFER_END); + + return 0; +} + +/* + * The raw TPM2 command in @buf is sent directly as send_command's UBUF-in + * param and the raw TPM2 response is read back from its UBUF-out param. + */ +static int tpm_qcom_send(struct tpm_chip *chip, u8 *buf, size_t bufsiz, + size_t cmd_len) +{ + struct tpm_qcom_private *pvt_data =3D dev_get_drvdata(chip->dev.parent); + size_t rsp_len =3D PAGE_ALIGN(MAX_RESPONSE_SIZE); + size_t copy_len; + int ret; + + if (cmd_len > MAX_COMMAND_SIZE) { + dev_err(&chip->dev, + "%s: len=3D%zd exceeds MAX_COMMAND_SIZE\n", + __func__, cmd_len); + return -EIO; + } + + u8 *response __free(kfree) =3D kzalloc(rsp_len, GFP_KERNEL); + if (!response) + return -ENOMEM; + + ret =3D tpm_qcom_send_command(pvt_data, buf, cmd_len, response, &rsp_len); + if (ret < 0) { + dev_err(&chip->dev, "%s: failed: ret=3D%d\n", __func__, ret); + return ret; + } + + copy_len =3D min_t(size_t, bufsiz, rsp_len); + memcpy(buf, response, copy_len); + + return copy_len; +} + +static const struct tpm_class_ops tpm_qcom_ops =3D { + .flags =3D TPM_OPS_AUTO_STARTUP, + .send =3D tpm_qcom_send, + .cmd_ready =3D tpm_qcom_cmd_ready, + .go_idle =3D tpm_qcom_go_idle, +}; + +static int tpm_qcom_ctx_match(struct tee_ioctl_version_data *ver, + const void *data) +{ + return (ver->impl_id =3D=3D TEE_IMPL_ID_QTEE); +} + +static int tpm_qcom_probe(struct tee_client_device *tee_dev) +{ + struct device *dev =3D &tee_dev->dev; + struct tpm_qcom_private *pvt_data; + struct tee_param_objref client_env_obj; + struct tee_param_objref tpm_svc_obj; + struct tpm_chip *chip; + int rc, err; + + pvt_data =3D devm_kzalloc(dev, sizeof(*pvt_data), GFP_KERNEL); + if (!pvt_data) + return -ENOMEM; + + dev_set_drvdata(dev, pvt_data); + + pvt_data->ctx =3D tee_client_open_context(NULL, tpm_qcom_ctx_match, NULL, + NULL); + if (IS_ERR(pvt_data->ctx)) + return -ENODEV; + + rc =3D tpm_qcom_get_client_env_obj(pvt_data->ctx, &client_env_obj); + if (rc) { + err =3D -EINVAL; + goto out_ctx; + } + + rc =3D tpm_qcom_get_svc_obj(pvt_data->ctx, client_env_obj, &tpm_svc_obj); + if (rc) { + err =3D -EINVAL; + goto out_client_env; + } + pvt_data->tpm_svc_obj =3D tpm_svc_obj; + pvt_data->dev =3D dev; + + err =3D tpm_qcom_get_ta_details(pvt_data); + if (err) + goto out_svc_obj; + + chip =3D tpm_chip_alloc(dev, &tpm_qcom_ops); + if (IS_ERR(chip)) { + dev_err(dev, "%s: tpm_chip_alloc failed\n", __func__); + err =3D PTR_ERR(chip); + goto out_svc_obj; + } + + pvt_data->chip =3D chip; + pvt_data->chip->flags |=3D TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_SYNC; + + err =3D tpm_chip_register(pvt_data->chip); + if (err) { + dev_err(dev, "%s: tpm_chip_register failed with rc=3D%d\n", + __func__, err); + goto out_chip; + } + + tpm_qcom_release_object(pvt_data->ctx, client_env_obj); + return 0; + +out_chip: + put_device(&pvt_data->chip->dev); +out_svc_obj: + tpm_qcom_release_object(pvt_data->ctx, tpm_svc_obj); +out_client_env: + tpm_qcom_release_object(pvt_data->ctx, client_env_obj); +out_ctx: + tee_client_close_context(pvt_data->ctx); + return err; +} + +static void tpm_qcom_remove(struct tee_client_device *tee_dev) +{ + struct tpm_qcom_private *pvt_data =3D dev_get_drvdata(&tee_dev->dev); + + tpm_chip_unregister(pvt_data->chip); + put_device(&pvt_data->chip->dev); + tpm_qcom_release_object(pvt_data->ctx, pvt_data->tpm_svc_obj); + tee_client_close_context(pvt_data->ctx); +} + +static const struct tee_client_device_id tpm_qcom_id_table[] =3D { + { tpm_qcom_uuid }, + {} +}; +MODULE_DEVICE_TABLE(tee, tpm_qcom_id_table); + +static struct tee_client_driver tpm_qcom_driver =3D { + .id_table =3D tpm_qcom_id_table, + .probe =3D tpm_qcom_probe, + .remove =3D tpm_qcom_remove, + .driver =3D { + .name =3D "tpm-qcom", + }, +}; + +module_tee_client_driver(tpm_qcom_driver); + +MODULE_DESCRIPTION("TPM driver for Qualcomm TPM TA"); +MODULE_AUTHOR("Kuldeep Singh "); +MODULE_LICENSE("GPL"); diff --git a/drivers/char/tpm/tpm_qcom.h b/drivers/char/tpm/tpm_qcom.h new file mode 100644 index 000000000000..0f3756944768 --- /dev/null +++ b/drivers/char/tpm/tpm_qcom.h @@ -0,0 +1,82 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + */ + +#ifndef __TPM_QCOM_H__ +#define __TPM_QCOM_H__ + +#include +#include +#include +#include + +#define QCOMTEE_ROOT_OP_REG_WITH_CREDENTIALS 5 +#define QCOMTEE_OP_CLIENT_ENV_OPEN 0 +#define QCOMTEE_MSG_OBJECT_OP_MASK GENMASK(15, 0) +#define QCOMTEE_MSG_OBJECT_OP_RELEASE (QCOMTEE_MSG_OBJECT_OP_MASK - 0) + +#define QCOMTEE_TPM_OP_SEND_COMMAND 0 + +/* UID of the "qcom.tz.tpm" service */ +#define QCOMTEE_TPM_UID 489 + +/* Max buffer size supported by TPM TA */ +#define MAX_COMMAND_SIZE SZ_4K +#define MAX_RESPONSE_SIZE SZ_4K + +#define QCOMTEE_TPM_GET_TA_VERSION_ID 0x0001000 +#define QCOMTEE_TPM_TA_VERSION_GET_MAJOR(ver) ((u32)(ver) >> 16) +#define QCOMTEE_TPM_TA_VERSION_GET_MINOR(ver) ((u32)(ver) & 0x0000ffffU) + +struct tpm_qcom_ta_version_req { + u32 command_id; +} __packed; + +struct tpm_qcom_ta_version_rsp { + u32 status; + u32 command_id; + u32 version_num; +} __packed; + +#define QCOMTEE_TPM_TYPE_ID 0x0080000 +#define QCOMTEE_TPM_TYPE_DTPM 0x6454504dU +#define QCOMTEE_TPM_TYPE_FTPM 0x6654504dU +#define QCOMTEE_TPM_TYPE_NONE 0x4e6f6e65U + +struct tpm_qcom_type_req { + u32 command_id; +} __packed; + +struct tpm_qcom_type_rsp { + u32 command_id; + u32 status; + u32 tpm_type; +} __packed; + +/* dTPM SPI transfer optimization: + * TRANSFER_START before a burst of commands, TRANSFER_END once done. + */ +#define QCOMTEE_TPM_TRANSFER_ID 0x0000002 +#define QCOMTEE_TPM_TRANSFER_END 0 +#define QCOMTEE_TPM_TRANSFER_START 1 + +struct tpm_qcom_transfer_req { + u32 command_id; + u32 transfer_state; +} __packed; + +struct tpm_qcom_transfer_rsp { + u32 command_id; + u32 status; +} __packed; + +struct tpm_qcom_private { + struct tpm_chip *chip; + struct device *dev; + struct tee_context *ctx; + struct tee_param_objref tpm_svc_obj; + bool is_dtpm; +}; + +#endif /* __TPM_QCOM_H__ */ --=20 2.34.1