From 6d9e7fea759a9be40b419820e950ce223597bbe2 Mon Sep 17 00:00:00 2001
From: KeatonTheBot <keaton@ryujinx.app>
Date: Wed, 15 Oct 2025 22:42:38 -0500
Subject: [PATCH] 12 GiB heap crash workaround

Using resolution mods, heaps past 8 GiB work in some games (like LoZ: TotK) and not in others (like SMP Jamboree). Setting the heap to a hard limit of 8 GiB on the 10 & 12 GiB DRAM options seems to be the safe bet right now until a better solution is found.
---
 .../HOS/Kernel/Memory/KPageTableBase.cs       | 24 ++++++++++++-------
 .../HOS/Kernel/SupervisorCall/Syscall.cs      |  2 +-
 2 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs b/src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
index 288e25e9f..d9c45d1c5 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
@@ -201,9 +201,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 case ProcessCreationFlags.AddressSpace64BitDeprecated:
                     aliasRegion.Size = 0x180000000;
                     heapRegion.Size = memConfig switch {
-                        MemoryConfiguration.MemoryConfiguration10GiB
-                            or MemoryConfiguration.MemoryConfiguration12GiB => 0x300000000u,
-                        _ => 0x180000000u
+                        MemoryConfiguration.MemoryConfiguration6GiB => 0x180000000u,
+                        MemoryConfiguration.MemoryConfiguration8GiB
+                            or MemoryConfiguration.MemoryConfiguration10GiB
+                            or MemoryConfiguration.MemoryConfiguration12GiB => 0x200000000u,
+                        _ => 0x100000000u
                     };
                     stackRegion.Size = 0;
                     tlsIoRegion.Size = 0;
@@ -236,9 +238,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
                         aliasRegion.Size = reservedAddressSpaceSize >= 0x1800000000 ? 0x1000000000 : 1UL << (addressSpaceWidth - 3);
                         heapRegion.Size = memConfig switch {
-                            MemoryConfiguration.MemoryConfiguration10GiB
-                                or MemoryConfiguration.MemoryConfiguration12GiB => 0x300000000u,
-                            _ => 0x180000000u
+                            MemoryConfiguration.MemoryConfiguration6GiB => 0x180000000u,
+                            MemoryConfiguration.MemoryConfiguration8GiB
+                                or MemoryConfiguration.MemoryConfiguration10GiB
+                                or MemoryConfiguration.MemoryConfiguration12GiB => 0x200000000u,
+                            _ => 0x100000000u
                         };
                         stackRegion.Size = 1UL << (addressSpaceWidth - 8);
                         tlsIoRegion.Size = 1UL << (addressSpaceWidth - 3);
@@ -254,9 +258,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                     {
                         aliasRegion.Size = 0x1000000000;
                         heapRegion.Size = memConfig switch {
-                            MemoryConfiguration.MemoryConfiguration10GiB
-                                or MemoryConfiguration.MemoryConfiguration12GiB => 0x300000000u,
-                            _ => 0x180000000u
+                            MemoryConfiguration.MemoryConfiguration6GiB => 0x180000000u,
+                            MemoryConfiguration.MemoryConfiguration8GiB
+                                or MemoryConfiguration.MemoryConfiguration10GiB
+                                or MemoryConfiguration.MemoryConfiguration12GiB => 0x200000000u,
+                            _ => 0x100000000u
                         };
                         stackRegion.Size = 0x80000000;
                         tlsIoRegion.Size = 0x1000000000;
diff --git a/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs b/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
index 79ddd0122..52449a35e 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
@@ -881,7 +881,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
         [Svc(1)]
         public Result SetHeapSize([PointerSized] out ulong address, [PointerSized] ulong size)
         {
-            if ((size & 0xfffffffd001fffff) != 0)
+            if ((size & 0xfffffffe001fffff) != 0)
             {
                 address = 0;