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We are using Security Extension feature for ARMv7-A architecture. Is it possible for ThreadX and the user application to run in non-secure mode with support for calling secure services for ARMv7-A architecture? Such secure services may have low priority so that context switching is needed. Only ARMv8-M porting of ThreadX seems to support such feature.
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ThreadX does not have any security extension support for ARMv7-A.