kernel/linux.git/drivers/tee/optee, branch linux-4.20.y

tee: optee: avoid possible double list_del()

2019-02-12T19:02:18+00:00

[ Upstream commit b2d102bd0146d9eb1fa630ca0cd19a15ef2f74c8 ] This bug occurs when: - a new request arrives, one thread(let's call it A) is pending in optee_supp_req() with req->busy is initial value false. - tee-supplicant is killed, then optee_supp_release() is called, this function calls list_del(&req->link), and set supp->ctx to NULL. And it also wake up process A. - process A continues, it firstly checks supp->ctx which is NULL, then checks req->busy which is false, at last run list_del(&req->link). This triggers double list_del() and results kernel panic. For solve this problem, we rename req->busy to req->in_queue, and associate it with state of whether req is linked to supp->reqs. So we can just only check req->in_queue to make decision calling list_del() or not. Signed-off-by: Zhizhou Zhang Signed-off-by: Jens Wiklander Signed-off-by: Sasha Levin

Merge tag 'tee-drv-for-4.20' of git://git.linaro.org/people/jens.wiklander/linux-tee into next/drivers

2018-08-26T23:27:32+00:00

Misc enhancement for tee driver subsystem * Adds a kernel internal tee client interface allowing other drivers etc to access a TEE * OP-TEE driver takes DT status property into account * tag 'tee-drv-for-4.20' of git://git.linaro.org/people/jens.wiklander/linux-tee: tee: add kernel internal client interface tee: optee: take DT status property into account Signed-off-by: Olof Johansson

tee: optee: take DT status property into account

2018-08-24T09:55:18+00:00

DT nodes may have a 'status' property which, if set to anything other than 'ok' or 'okay', indicates to the OS that the DT node should be treated as if it was not present. So add that missing logic to the OP-TEE driver. Signed-off-by: Ard Biesheuvel Signed-off-by: Jens Wiklander

tee: optee: making OPTEE_SHM_NUM_PRIV_PAGES configurable via Kconfig

2018-06-20T09:20:36+00:00

This change adds KCONFIG option to set number of pages out of whole shared memory to be used for OP-TEE driver private data structures. Signed-off-by: Sahil Malhotra [jw: fixing trivial merge conflict] Signed-off-by: Jens Wiklander

tee: replace getnstimeofday64() with ktime_get_real_ts64()

2018-06-19T14:37:14+00:00

The two do the same thing, but we want to have a consistent naming in the kernel. Signed-off-by: Arnd Bergmann Signed-off-by: Jens Wiklander

tee: optee: report OP-TEE revision information

2018-03-06T10:03:55+00:00

When the driver initializes, report the following information about the OP-TEE OS: - major and minor version, - build identifier (if available). Signed-off-by: Jerome Forissier Reviewed-by: Matthias Brugger Signed-off-by: Jens Wiklander

tee: optee: GET_OS_REVISION: document a2 as a build identifier

2018-03-06T10:03:55+00:00

In the OPTEE_SMC_CALL_GET_OS_REVISION request, the previously reserved parameter a2 is now documented as being an optional build identifier (such as an SCM revision or commit ID, for instance). A new structure optee_smc_call_get_os_revision_result is introduced to be used when querying the secure OS version, instead of re-using the struct defined for OPTEE_SMC_CALLS_REVISION. Signed-off-by: Jerome Forissier Reviewed-by: Matthias Brugger Signed-off-by: Jens Wiklander

Merge tag 'tee-drv-dynamic-shm+fixes-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee into next/drivers

2018-01-12T02:05:06+00:00

This pull request updates the previous tee-drv-dynamic-shm-for-v4.16 pull request with five new patches fixing review comments and errors. Apart from three small fixes there's two larger patches that in the end checks that memory to be registered really is normal cached memory. * tag 'tee-drv-dynamic-shm+fixes-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee: tee: shm: Potential NULL dereference calling tee_shm_register() tee: shm: don't put_page on null shm->pages tee: shm: make function __tee_shm_alloc static tee: optee: check type of registered shared memory tee: add start argument to shm_register callback Signed-off-by: Olof Johansson

tee: optee: check type of registered shared memory

2017-12-28T12:21:27+00:00

Checks the memory type of the pages to be registered as shared memory. Only normal cached memory is allowed. Signed-off-by: Jens Wiklander

tee: add start argument to shm_register callback

2017-12-28T09:08:00+00:00

Adds a start argument to the shm_register callback to allow the callback to check memory type of the passed pages. Signed-off-by: Jens Wiklander