Better implementation of SetThreadCoreMask that allows changing the Core Mask (untested, no clue if it actually works)

Ryujinx.Core/OsHle/Handles/KProcessScheduler.cs

@@ -196,6 +196,28 @@ namespace Ryujinx.Core.OsHle.Handles
             Resume(Thread);
         }
 
+        public bool TryRunning(KThread Thread)
+        {
+            if (!AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
+            {
+                throw new InvalidOperationException();
+            }
+
+            lock (SchedLock)
+            {
+                if (WaitingToRun.HasThread(SchedThread) && AddActiveCore(Thread))
+                {
+                    WaitingToRun.Remove(SchedThread);
+
+                    RunThread(SchedThread);
+
+                    return true;
+                }
+
+                return false;
+            }
+        }
+
         public void Resume(KThread Thread)
         {
             if (!AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))

Ryujinx.Core/OsHle/Handles/KThread.cs

@@ -22,7 +22,7 @@ namespace Ryujinx.Core.OsHle.Handles
         public int ActualPriority { get; private set; }
         public int WantedPriority { get; private set; }
 
-        public int IdealCore  { get; private set; }
+        public int IdealCore  { get; set; }
         public int ActualCore { get; set; }
 
         public int WaitHandle { get; set; }