From e96ef6d53250b72d084f7e6baf13e9bab485bca2 Mon Sep 17 00:00:00 2001
From: Mary <me@thog.eu>
Date: Thu, 30 Dec 2021 10:55:06 +0100
Subject: kernel: Implement thread pinning support (#2840)

* kernel: Implement Thread pinning support

This commit adds support for 8.x thread pinning changes and implement SynchronizePreemptionState syscall.

Based on kernel 13.x reverse.

* Address gdkchan's comment

* kernel: fix missing critical section leave in SetActivity

Fix Unity games

* Implement missing bits on the interrupt handler and inline update pinning function as it cannot be generic

* Fix some bugs in SetActivity and SetCoreAndAffinityMask

* Address gdkchan's comments
---
 .../HOS/Kernel/SupervisorCall/SyscallHandler.cs    | 24 ++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

(limited to 'Ryujinx.HLE/HOS/Kernel/SupervisorCall/SyscallHandler.cs')

diff --git a/Ryujinx.HLE/HOS/Kernel/SupervisorCall/SyscallHandler.cs b/Ryujinx.HLE/HOS/Kernel/SupervisorCall/SyscallHandler.cs
index b4e7a0bf..5e795d35 100644
--- a/Ryujinx.HLE/HOS/Kernel/SupervisorCall/SyscallHandler.cs
+++ b/Ryujinx.HLE/HOS/Kernel/SupervisorCall/SyscallHandler.cs
@@ -19,7 +19,22 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
 
         public void SvcCall(object sender, InstExceptionEventArgs e)
         {
-            ExecutionContext context = (ExecutionContext)sender;
+            KThread currentThread = KernelStatic.GetCurrentThread();
+
+            if (currentThread.Owner != null &&
+                currentThread.GetUserDisableCount() != 0 &&
+                currentThread.Owner.PinnedThreads[currentThread.CurrentCore] == null)
+            {
+                _context.CriticalSection.Enter();
+
+                currentThread.Owner.PinThread(currentThread);
+
+                currentThread.SetUserInterruptFlag();
+
+                _context.CriticalSection.Leave();
+            }
+
+            ExecutionContext context = (ExecutionContext)sender; 
 
             if (context.IsAarch32)
             {
@@ -44,13 +59,6 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
                 svcFunc(_syscall64, context);
             }
 
-            PostSvcHandler();
-        }
-
-        private void PostSvcHandler()
-        {
-            KThread currentThread = KernelStatic.GetCurrentThread();
-
             currentThread.HandlePostSyscall();
         }
     }
-- 
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