[PATCH v2] tee: amdtee: unload TA only when its refcount becomes 0

Rijo Thomas Rijo-john.Thomas at amd.com
Mon Apr 12 10:19:51 UTC 2021



On 12/04/21 1:06 pm, Jens Wiklander wrote:
> On Mon, Apr 5, 2021 at 11:43 AM Rijo Thomas <Rijo-john.Thomas at amd.com> wrote:
>>
>> 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 at amd.com>
>> Signed-off-by: Rijo Thomas <Rijo-john.Thomas at amd.com>
>> ---
>> v2:
>>  * Unload TA if get_ta_refcount() fails
>>
>>  drivers/tee/amdtee/amdtee_private.h | 13 ++++
>>  drivers/tee/amdtee/call.c           | 94 ++++++++++++++++++++++++++---
>>  drivers/tee/amdtee/core.c           | 15 +++--
>>  3 files changed, 106 insertions(+), 16 deletions(-)
> 
> Looks good to me. Please address Dan's comment.
> 

Hi Jens,

I have replied to Dan's comment.

If you are okay with the current patch, request you to pull this.

Thanks,
Rijo

> Cheers,
> Jens
> 


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