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Message-ID: <aMEINycp24DG6KXO@sumit-X1> Date: Wed, 10 Sep 2025 10:40:15 +0530 From: Sumit Garg <sumit.garg@...nel.org> To: Amirreza Zarrabi <amirreza.zarrabi@....qualcomm.com> Cc: Jens Wiklander <jens.wiklander@...aro.org>, Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, Apurupa Pattapu <quic_apurupa@...cinc.com>, Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, Sumit Semwal <sumit.semwal@...aro.org>, Christian König <christian.koenig@....com>, Harshal Dev <quic_hdev@...cinc.com>, linux-arm-msm@...r.kernel.org, op-tee@...ts.trustedfirmware.org, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org, dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org, linux-doc@...r.kernel.org, Neil Armstrong <neil.armstrong@...aro.org>, Kuldeep Singh <quic_kuldsing@...cinc.com>, Sumit Garg <sumit.garg@....qualcomm.com> Subject: Re: [PATCH v10 00/11] Trusted Execution Environment (TEE) driver for Qualcomm TEE (QTEE) Hi Amir, On Tue, Sep 09, 2025 at 05:11:02PM -0700, Amirreza Zarrabi wrote: > This patch series introduces a Trusted Execution Environment (TEE) > driver for Qualcomm TEE (QTEE). QTEE enables Trusted Applications (TAs) > and services to run securely. It uses an object-based interface, where > each service is an object with sets of operations. Clients can invoke > these operations on objects, which can generate results, including other > objects. For example, an object can load a TA and return another object > that represents the loaded TA, allowing access to its services. > > Kernel and userspace services are also available to QTEE through a > similar approach. QTEE makes callback requests that are converted into > object invocations. These objects can represent services within the > kernel or userspace process. > > Note: This patch series focuses on QTEE objects and userspace services. > > Linux already provides a TEE subsystem, which is described in [1]. The > tee subsystem provides a generic ioctl interface, TEE_IOC_INVOKE, which > can be used by userspace to talk to a TEE backend driver. We extend the > Linux TEE subsystem to understand object parameters and an ioctl call so > client can invoke objects in QTEE: > > - TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF_* > - TEE_IOC_OBJECT_INVOKE > > The existing ioctl calls TEE_IOC_SUPPL_RECV and TEE_IOC_SUPPL_SEND are > used for invoking services in the userspace process by QTEE. > > The TEE backend driver uses the QTEE Transport Message to communicate > with QTEE. Interactions through the object INVOKE interface are > translated into QTEE messages. Likewise, object invocations from QTEE > for userspace objects are converted into SEND/RECV ioctl calls to > supplicants. > > The details of QTEE Transport Message to communicate with QTEE is > available in [PATCH 12/12] Documentation: tee: Add Qualcomm TEE driver. > > You can run basic tests with following steps: > git clone https://github.com/quic/quic-teec.git > cd quic-teec > mkdir build > cmake .. -DCMAKE_TOOLCHAIN_FILE=CMakeToolchain.txt -DBUILD_UNITTEST=ON > > https://github.com/quic/quic-teec/blob/main/README.md lists dependencies > needed to build the above. > > More comprehensive tests are availabe at > https://github.com/qualcomm/minkipc. > > root@...m-armv8a:~# qtee_supplicant & > root@...m-armv8a:~# qtee_supplicant: process entry PPID = 378 > Total listener services to start = 4 > Opening CRequestTABuffer_open > Path /data/ > register_service ::Opening CRegisterTABufCBO_UID > Calling TAbufCBO Register > QTEE_SUPPLICANT RUNNING > > root@...m-armv8a:~# smcinvoke_client -c /data 1 > Run callback obj test... > Load /data/tzecotestapp.mbn, size 52192, buf 0x1e44ba0. > System Time: 2024-02-27 17:26:31 > PASSED - Callback tests with Buffer inputs. > PASSED - Callback tests with Remote and Callback object inputs. > PASSED - Callback tests with Memory Object inputs. > TEST PASSED! > root@...m-armv8a:~# > root@...m-armv8a:~# smcinvoke_client -m /data 1 > Run memory obj test... > Load /data/tzecotestapp.mbn, size 52192, buf 0x26cafba0. > System Time: 2024-02-27 17:26:39 > PASSED - Single Memory Object access Test. > PASSED - Two Memory Object access Test. > TEST PASSED! > > This series has been tested for QTEE object invocations, including > loading a TA, requesting services from the TA, memory sharing, and > handling callback requests to a supplicant. > > Tested platforms: sm8650-mtp, sm8550-qrd, sm8650-qrd, sm8650-hdk > > [1] https://www.kernel.org/doc/Documentation/tee.txt > > Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi@....qualcomm.com> > > Changes in v10: > - Remove all loggings in qcom_scm_qtee_init(). > - Reorder patches. > - Link to v9: > https://lore.kernel.org/r/20250901-qcom-tee-using-tee-ss-without-mem-obj-v9-0-a2af23f132d5@oss.qualcomm.com It's still not rebased on top of linux-next and have merge conflicts, see my comments here [1]. [1] https://lore.kernel.org/all/aL_MCagNVIDXW0wp@sumit-X1/ -Sumit > > Changes in v9: > - Remove unnecessary logging in qcom_scm_probe(). > - Replace the platform_device_alloc()/add() sequence with > platform_device_register_data(). > - Fixed sparse warning. > - Fixed documentation typo. > - Link to v8: > https://lore.kernel.org/r/20250820-qcom-tee-using-tee-ss-without-mem-obj-v8-0-7066680f138a@oss.qualcomm.com > > Changes in v8: > - Check if arguments to qcom_scm_qtee_invoke_smc() and > qcom_scm_qtee_callback_response() are NULL. > - Add CPU_BIG_ENDIAN as a dependency to Kconfig. > - Fixed kernel bot errors. > - Link to v7: > https://lore.kernel.org/r/20250812-qcom-tee-using-tee-ss-without-mem-obj-v7-0-ce7a1a774803@oss.qualcomm.com > > Changes in v7: > - Updated copyrights. > - Updated Acked-by: tags. > - Fixed kernel bot errors. > - Link to v6: > https://lore.kernel.org/r/20250713-qcom-tee-using-tee-ss-without-mem-obj-v6-0-697fb7d41c36@oss.qualcomm.com > > Changes in v6: > - Relocate QTEE version into the driver's main service structure. > - Simplfies qcomtee_objref_to_arg() and qcomtee_objref_from_arg(). > - Enhanced the return logic of qcomtee_object_do_invoke_internal(). > - Improve comments and remove redundant checks. > - Improve helpers in qcomtee_msh.h to use GENMASK() and FIELD_GET(). > - updated Tested-by:, Acked-by:, and Reviewed-by: tags > - Link to v5: > https://lore.kernel.org/r/20250526-qcom-tee-using-tee-ss-without-mem-obj-v5-0-024e3221b0b9@oss.qualcomm.com > > Changes in v5: > - Remove references to kernel services and public APIs. > - Support auto detection for failing devices (e.g., RB1, RB4). > - Add helpers for obtaining client environment and service objects. > - Query the QTEE version and print it. > - Move remaining static variables, including the object table, to struct > qcomtee. > - Update TEE_MAX_ARG_SIZE to 4096. > - Add a dependancy to QCOM_TZMEM_MODE_SHMBRIDGE in Kconfig > - Reorganize code by removing release.c and qcom_scm.c. > - Add more error messages and improve comments. > - updated Tested-by:, Acked-by:, and Reviewed-by: tags > - Link to v4: https://lore.kernel.org/r/20250428-qcom-tee-using-tee-ss-without-mem-obj-v4-0-6a143640a6cb@oss.qualcomm.com > > Changes in v4: > - Move teedev_ctx_get/put and tee_device_get/put to tee_core.h. > - Rename object to id in struct tee_ioctl_object_invoke_arg. > - Replace spinlock with mutex for qtee_objects_idr. > - Move qcomtee_object_get to qcomtee_user/memobj_param_to_object. > - More code cleanup following the comments. > - Cleanup documentations. > - Update MAINTAINERS file. > - Link to v3: https://lore.kernel.org/r/20250327-qcom-tee-using-tee-ss-without-mem-obj-v3-0-7f457073282d@oss.qualcomm.com > > Changes in v3: > - Export shm_bridge create/delete APIs. > - Enable support for QTEE memory objects. > - Update the memory management code to use the TEE subsystem for all > allocations using the pool. > - Move all driver states into the driver's main service struct. > - Add more documentations. > - Link to v2: https://lore.kernel.org/r/20250202-qcom-tee-using-tee-ss-without-mem-obj-v2-0-297eacd0d34f@quicinc.com > > Changes in v2: > - Clean up commit messages and comments. > - Use better names such as ubuf instead of membuf or QCOMTEE prefix > instead of QCOM_TEE, or names that are more consistent with other > TEE-backend drivers such as qcomtee_context_data instead of > qcom_tee_context. > - Drop the DTS patch and instantiate the device from the scm driver. > - Use a single structure for all driver's internal states. > - Drop srcu primitives and use the existing mutex for synchronization > between the supplicant and QTEE. > - Directly use tee_context to track the lifetime of qcomtee_context_data. > - Add close_context() to be called when the user closes the tee_context. > - Link to v1: https://lore.kernel.org/r/20241202-qcom-tee-using-tee-ss-without-mem-obj-v1-0-f502ef01e016@quicinc.com > > Changes in v1: > - It is a complete rewrite to utilize the TEE subsystem. > - Link to RFC: https://lore.kernel.org/all/20240702-qcom-tee-object-and-ioctls-v1-0-633c3ddf57ee@quicinc.com > > --- > Amirreza Zarrabi (11): > firmware: qcom: tzmem: export shm_bridge create/delete > firmware: qcom: scm: add support for object invocation > tee: allow a driver to allocate a tee_device without a pool > tee: add close_context to TEE driver operation > tee: add TEE_IOCTL_PARAM_ATTR_TYPE_UBUF > tee: add TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF > tee: increase TEE_MAX_ARG_SIZE to 4096 > tee: add Qualcomm TEE driver > tee: qcom: add primordial object > tee: qcom: enable TEE_IOC_SHM_ALLOC ioctl > Documentation: tee: Add Qualcomm TEE driver > > Documentation/tee/index.rst | 1 + > Documentation/tee/qtee.rst | 96 ++++ > MAINTAINERS | 7 + > drivers/firmware/qcom/qcom_scm.c | 119 ++++ > drivers/firmware/qcom/qcom_scm.h | 7 + > drivers/firmware/qcom/qcom_tzmem.c | 63 ++- > drivers/tee/Kconfig | 1 + > drivers/tee/Makefile | 1 + > drivers/tee/qcomtee/Kconfig | 12 + > drivers/tee/qcomtee/Makefile | 9 + > drivers/tee/qcomtee/async.c | 182 ++++++ > drivers/tee/qcomtee/call.c | 820 +++++++++++++++++++++++++++ > drivers/tee/qcomtee/core.c | 915 +++++++++++++++++++++++++++++++ > drivers/tee/qcomtee/mem_obj.c | 169 ++++++ > drivers/tee/qcomtee/primordial_obj.c | 113 ++++ > drivers/tee/qcomtee/qcomtee.h | 185 +++++++ > drivers/tee/qcomtee/qcomtee_msg.h | 304 ++++++++++ > drivers/tee/qcomtee/qcomtee_object.h | 316 +++++++++++ > drivers/tee/qcomtee/shm.c | 150 +++++ > drivers/tee/qcomtee/user_obj.c | 692 +++++++++++++++++++++++ > drivers/tee/tee_core.c | 127 ++++- > drivers/tee/tee_private.h | 6 - > include/linux/firmware/qcom/qcom_scm.h | 6 + > include/linux/firmware/qcom/qcom_tzmem.h | 15 + > include/linux/tee_core.h | 54 +- > include/linux/tee_drv.h | 12 + > include/uapi/linux/tee.h | 56 +- > 27 files changed, 4410 insertions(+), 28 deletions(-) > --- > base-commit: 33bcf93b9a6b028758105680f8b538a31bc563cf > change-id: 20241202-qcom-tee-using-tee-ss-without-mem-obj-362c66340527 > > Best regards, > -- > Amirreza Zarrabi <amirreza.zarrabi@....qualcomm.com> >
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