hle: kernel: Migrate idle threads.

src/core/hle/kernel/k_scheduler.cpp

@@ -623,7 +623,7 @@ KThread* KScheduler::GetCurrentThread() const {
     if (auto result = current_thread.load(); result) {
         return result;
     }
-    return idle_thread;
+    return idle_thread.get();
 }
 
 u64 KScheduler::GetLastContextSwitchTicks() const {
@@ -708,7 +708,7 @@ void KScheduler::ScheduleImpl() {
 
     // We never want to schedule a null thread, so use the idle thread if we don't have a next.
     if (next_thread == nullptr) {
-        next_thread = idle_thread;
+        next_thread = idle_thread.get();
     }
 
     // If we're not actually switching thread, there's nothing to do.
@@ -769,7 +769,7 @@ void KScheduler::SwitchToCurrent() {
                     break;
                 }
             }
-            auto thread = next_thread ? next_thread : idle_thread;
+            auto thread = next_thread ? next_thread : idle_thread.get();
             Common::Fiber::YieldTo(switch_fiber, *thread->GetHostContext());
         } while (!is_switch_pending());
     }
@@ -792,13 +792,9 @@ void KScheduler::UpdateLastContextSwitchTime(KThread* thread, Process* process)
 }
 
 void KScheduler::Initialize() {
-    std::string name = "Idle Thread Id:" + std::to_string(core_id);
-    std::function<void(void*)> init_func = Core::CpuManager::GetIdleThreadStartFunc();
-    void* init_func_parameter = system.GetCpuManager().GetStartFuncParamater();
-    auto thread_res = KThread::CreateThread(
-        system, ThreadType::Main, name, 0, KThread::IdleThreadPriority, 0,
-        static_cast<u32>(core_id), 0, nullptr, std::move(init_func), init_func_parameter);
-    idle_thread = thread_res.Unwrap().get();
+    idle_thread = std::make_unique<KThread>(system.Kernel());
+    ASSERT(KThread::InitializeIdleThread(system, idle_thread.get(), core_id).IsSuccess());
+    idle_thread->SetName(fmt::format("IdleThread:{}", core_id));
 }
 
 KScopedSchedulerLock::KScopedSchedulerLock(KernelCore& kernel)

src/core/hle/kernel/k_scheduler.h

@@ -51,7 +51,7 @@ public:
 
     /// Returns true if the scheduler is idle
     [[nodiscard]] bool IsIdle() const {
-        return GetCurrentThread() == idle_thread;
+        return GetCurrentThread() == idle_thread.get();
     }
 
     /// Gets the timestamp for the last context switch in ticks.
@@ -173,12 +173,12 @@ private:
     KThread* prev_thread{};
     std::atomic<KThread*> current_thread{};
 
-    KThread* idle_thread;
+    std::unique_ptr<KThread> idle_thread;
 
     std::shared_ptr<Common::Fiber> switch_fiber{};
 
     struct SchedulingState {
-        std::atomic<bool> needs_scheduling;
+        std::atomic<bool> needs_scheduling{};
         bool interrupt_task_thread_runnable{};
         bool should_count_idle{};
         u64 idle_count{};