[nce] handles duplicate NCE interrupts

src/core/arm/nce/arm_nce.cpp

@@ -369,8 +369,8 @@ void ArmNce::SetContext(const Kernel::Svc::ThreadContext& ctx) {
 }
 
 void ArmNce::SignalInterrupt(Kernel::KThread* thread) {
-    // Add break loop condition.
-    m_guest_ctx.esr_el1.fetch_or(static_cast<u64>(HaltReason::BreakLoop));
+    constexpr u64 break_loop = static_cast<u64>(HaltReason::BreakLoop);
+    if ((m_guest_ctx.esr_el1.fetch_or(break_loop) & break_loop) != 0) return;
 
     auto* params = &thread->GetNativeExecutionParameters();
     LockThreadParameters(params);