diff options
Diffstat (limited to 'docs/interrupt-framework-design.rst')
| -rw-r--r-- | docs/interrupt-framework-design.rst | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/docs/interrupt-framework-design.rst b/docs/interrupt-framework-design.rst index d5654870..f65e0559 100644 --- a/docs/interrupt-framework-design.rst +++ b/docs/interrupt-framework-design.rst @@ -419,6 +419,9 @@ runtime. Test secure payload dispatcher behavior ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +**Note:** where this document discusses ``TSP_NS_INTR_ASYNC_PREEMPT`` as being +``1``, the same results also apply when ``EL3_EXCEPTION_HANDLING`` is ``1``. + The TSPD only handles Secure-EL1 interrupts and is provided with the following routing model at build time. @@ -813,9 +816,10 @@ Test secure payload dispatcher non-secure interrupt handling The TSP in Secure-EL1 can be preempted by a non-secure interrupt during ``yielding`` SMC processing or by a higher priority EL3 interrupt during -Secure-EL1 interrupt processing. Currently only non-secure interrupts can -cause preemption of TSP since there are no EL3 interrupts in the -system. +Secure-EL1 interrupt processing. When ``EL3_EXCEPTION_HANDLING`` is ``0``, only +non-secure interrupts can cause preemption of TSP since there are no EL3 +interrupts in the system. With ``EL3_EXCEPTION_HANDLING=1`` however, any EL3 +interrupt may preempt Secure execution. It should be noted that while TSP is preempted, the TSPD only allows entry into the TSP either for Secure-EL1 interrupt handling or for resuming the preempted @@ -998,7 +1002,7 @@ TSP by returning ``SMC_UNK`` error. -------------- -*Copyright (c) 2014-2015, ARM Limited and Contributors. All rights reserved.* +*Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.* .. _Porting Guide: ./porting-guide.rst .. _SMC calling convention: http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html |