linux.git/drivers/tee/amdtee/call.c, branch v6.0 Linux kernel source tree tee: amdtee: Make use of the helper macro LIST_HEAD() 2022-02-14T09:57:55+00:00 Cai Huoqing cai.huoqing@linux.dev 2022-02-09T03:27:43+00:00 f7b67642dd98617dc569836cdcba041c7ff00cbb Replace "struct list_head head = LIST_HEAD_INIT(head)" with "LIST_HEAD(head)" to simplify the code. Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev> Reviewed-by: Rijo Thomas <Rijo-john.Thomas@amd.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> 
Replace "struct list_head head = LIST_HEAD_INIT(head)" with
"LIST_HEAD(head)" to simplify the code.

Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev>
Reviewed-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
tee: amdtee: unload TA only when its refcount becomes 0 2021-05-05T11:00:11+00:00 Rijo Thomas Rijo-john.Thomas@amd.com 2021-04-14T17:38:27+00:00 9f015b3765bf593b3ed5d3b588e409dc0ffa9f85 Same Trusted Application (TA) can be loaded in multiple TEE contexts. If it is a single instance TA, the TA should not get unloaded from AMD Secure Processor, while it is still in use in another TEE context. Therefore reference count TA and unload it when the count becomes zero. Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver") Reviewed-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com> Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com> Acked-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> 
Same Trusted Application (TA) can be loaded in multiple TEE contexts.

If it is a single instance TA, the TA should not get unloaded from AMD
Secure Processor, while it is still in use in another TEE context.

Therefore reference count TA and unload it when the count becomes zero.

Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver")
Reviewed-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
tee: amdtee: remove unused variable initialization 2020-01-16T07:18:13+00:00 Rijo Thomas Rijo-john.Thomas@amd.com 2020-01-09T12:53:18+00:00 5ae63958a6dea78467c95f1669a4f0affa59935b Remove unused variable initialization from driver code. If enabled as a compiler option, compiler may throw warning for unused assignments. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver") Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> 
Remove unused variable initialization from driver code.

If enabled as a compiler option, compiler may throw warning for
unused assignments.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver")
Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
tee: add AMD-TEE driver 2020-01-04T05:49:51+00:00 Rijo Thomas Rijo-john.Thomas@amd.com 2019-12-27T05:24:01+00:00 757cc3e9ff1d72d014096399d6e2bf03974d9da1 Adds AMD-TEE driver. * targets AMD APUs which has AMD Secure Processor with software-based Trusted Execution Environment (TEE) support * registers with TEE subsystem * defines tee_driver_ops function callbacks * kernel allocated memory is used as shared memory between normal world and secure world. * acts as REE (Rich Execution Environment) communication agent, which uses the services of AMD Secure Processor driver to submit commands for processing in TEE environment Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Tom Lendacky <thomas.lendacky@amd.com> Acked-by: Jens Wiklander <jens.wiklander@linaro.org> Co-developed-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com> Signed-off-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com> Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com> Reviewed-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> 
Adds AMD-TEE driver.
* targets AMD APUs which has AMD Secure Processor with software-based
  Trusted Execution Environment (TEE) support
* registers with TEE subsystem
* defines tee_driver_ops function callbacks
* kernel allocated memory is used as shared memory between normal
  world and secure world.
* acts as REE (Rich Execution Environment) communication agent, which
  uses the services of AMD Secure Processor driver to submit commands
  for processing in TEE environment

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Co-developed-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Reviewed-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>