tree 175383bc8f1f63a4ef8cfab1fe8c3217cc762d30
parent f4194ee52e4e23785ad7d5f7f87bb210268ada93
author Jeenu Viswambharan <jeenu.viswambharan@arm.com> 1515597769 +0000
committer Jeenu Viswambharan <jeenu.viswambharan@arm.com> 1517903935 +0000

TSPD: Explicitly allow NS preemption for Yielding SMCs

When EL3 exception handling is in effect (i.e.,
EL3_EXCEPTION_HANDLING=1), Non-secure interrupts can't preempt Secure
execution. However, for yielding SMCs, preemption by Non-secure
interupts is intended.

This patch therefore adds a call to ehf_allow_ns_preemption() before
dispatching a Yielding SMC to TSP.

Change-Id: Ia3a1ae252f3adc0f14e6d7e0502f251bdb349bdf
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>