6 files changed, 68 insertions, 359 deletions
diff --git a/Ryujinx.HLE/HOS/Kernel/Memory/KPageTable.cs b/Ryujinx.HLE/HOS/Kernel/Memory/KPageTable.cs
index d7ee04e3..9d521231 100644
--- a/Ryujinx.HLE/HOS/Kernel/Memory/KPageTable.cs
+++ b/Ryujinx.HLE/HOS/Kernel/Memory/KPageTable.cs
@@ -1,10 +1,7 @@
 using Ryujinx.HLE.HOS.Kernel.Common;
 using Ryujinx.Memory;
-using Ryujinx.Memory.Range;
 using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 
 namespace Ryujinx.HLE.HOS.Kernel.Memory
 {
@@ -12,17 +9,19 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
     {
         private readonly IVirtualMemoryManager _cpuMemory;
 
-        public override bool SupportsMemoryAliasing => true;
-
         public KPageTable(KernelContext context, IVirtualMemoryManager cpuMemory) : base(context)
         {
             _cpuMemory = cpuMemory;
         }
 
         /// <inheritdoc/>
-        protected override IEnumerable<HostMemoryRange> GetPhysicalRegions(ulong va, ulong size)
+        protected override void GetPhysicalRegions(ulong va, ulong size, KPageList pageList)
         {
-            return _cpuMemory.GetPhysicalRegions(va, size);
+            var ranges = _cpuMemory.GetPhysicalRegions(va, size);
+            foreach (var range in ranges)
+            {
+                pageList.AddRange(range.Address + DramMemoryMap.DramBase, range.Size / PageSize);
+            }
         }
 
         /// <inheritdoc/>
@@ -34,7 +33,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         /// <inheritdoc/>
         protected override KernelResult MapMemory(ulong src, ulong dst, ulong pagesCount, KMemoryPermission oldSrcPermission, KMemoryPermission newDstPermission)
         {
-            var srcRanges = GetPhysicalRegions(src, pagesCount * PageSize);
+            KPageList pageList = new KPageList();
+            GetPhysicalRegions(src, pagesCount * PageSize, pageList);
 
             KernelResult result = Reprotect(src, pagesCount, KMemoryPermission.None);
 
@@ -43,7 +43,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 return result;
             }
 
-            result = MapPages(dst, srcRanges, newDstPermission);
+            result = MapPages(dst, pageList, newDstPermission, false, 0);
 
             if (result != KernelResult.Success)
             {
@@ -59,10 +59,13 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         {
             ulong size = pagesCount * PageSize;
 
-            var srcRanges = GetPhysicalRegions(src, size);
-            var dstRanges = GetPhysicalRegions(dst, size);
+            KPageList srcPageList = new KPageList();
+            KPageList dstPageList = new KPageList();
 
-            if (!dstRanges.SequenceEqual(srcRanges))
+            GetPhysicalRegions(src, size, srcPageList);
+            GetPhysicalRegions(dst, size, dstPageList);
+
+            if (!dstPageList.IsEqual(srcPageList))
             {
                 return KernelResult.InvalidMemRange;
             }
@@ -78,7 +81,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
             if (result != KernelResult.Success)
             {
-                KernelResult mapResult = MapPages(dst, dstRanges, oldDstPermission);
+                KernelResult mapResult = MapPages(dst, dstPageList, oldDstPermission, false, 0);
                 Debug.Assert(mapResult == KernelResult.Success);
             }
 
@@ -92,7 +95,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
             Context.Memory.Commit(srcPa - DramMemoryMap.DramBase, size);
 
-            _cpuMemory.Map(dstVa, Context.Memory.GetPointer(srcPa - DramMemoryMap.DramBase, size), size);
+            _cpuMemory.Map(dstVa, srcPa - DramMemoryMap.DramBase, size);
 
             if (DramMemoryMap.IsHeapPhysicalAddress(srcPa))
             {
@@ -121,7 +124,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
                 Context.Memory.Commit(addr, size);
 
-                _cpuMemory.Map(currentVa, Context.Memory.GetPointer(addr, size), size);
+                _cpuMemory.Map(currentVa, addr, size);
 
                 if (shouldFillPages)
                 {
@@ -137,33 +140,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         }
 
         /// <inheritdoc/>
-        protected override KernelResult MapPages(ulong address, IEnumerable<HostMemoryRange> ranges, KMemoryPermission permission)
-        {
-            ulong currentVa = address;
-
-            foreach (var range in ranges)
-            {
-                ulong size = range.Size;
-
-                ulong pa = GetDramAddressFromHostAddress(range.Address);
-                if (pa != ulong.MaxValue)
-                {
-                    pa += DramMemoryMap.DramBase;
-                    if (DramMemoryMap.IsHeapPhysicalAddress(pa))
-                    {
-                        Context.MemoryManager.IncrementPagesReferenceCount(pa, size / PageSize);
-                    }
-                }
-
-                _cpuMemory.Map(currentVa, range.Address, size);
-
-                currentVa += size;
-            }
-
-            return KernelResult.Success;
-        }
-
-        /// <inheritdoc/>
         protected override KernelResult Unmap(ulong address, ulong pagesCount)
         {
             KPageList pagesToClose = new KPageList();
@@ -172,13 +148,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
             foreach (var region in regions)
             {
-                ulong pa = GetDramAddressFromHostAddress(region.Address);
-                if (pa == ulong.MaxValue)
-                {
-                    continue;
-                }
-
-                pa += DramMemoryMap.DramBase;
+                ulong pa = region.Address + DramMemoryMap.DramBase;
                 if (DramMemoryMap.IsHeapPhysicalAddress(pa))
                 {
                     pagesToClose.AddRange(pa, region.Size / PageSize);
@@ -217,15 +187,5 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         {
             _cpuMemory.Write(va, data);
         }
-
-        private ulong GetDramAddressFromHostAddress(nuint hostAddress)
-        {
-            if (hostAddress < (nuint)(ulong)Context.Memory.Pointer || hostAddress >= (nuint)((ulong)Context.Memory.Pointer + Context.Memory.Size))
-            {
-                return ulong.MaxValue;
-            }
-
-            return hostAddress - (ulong)Context.Memory.Pointer;
-        }
     }
 }
diff --git a/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs b/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
index fb3d669d..518a0f09 100644
--- a/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
+++ b/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
@@ -1,11 +1,9 @@
 using Ryujinx.Common;
 using Ryujinx.HLE.HOS.Kernel.Common;
 using Ryujinx.HLE.HOS.Kernel.Process;
-using Ryujinx.Memory.Range;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 
 namespace Ryujinx.HLE.HOS.Kernel.Memory
 {
@@ -73,8 +71,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
         private MersenneTwister _randomNumberGenerator;
 
-        public abstract bool SupportsMemoryAliasing { get; }
-
         private MemoryFillValue _heapFillValue;
         private MemoryFillValue _ipcFillValue;
 
@@ -305,7 +301,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             TlsIoRegionStart = tlsIoRegion.Start;
             TlsIoRegionEnd = tlsIoRegion.End;
 
-            // TODO: Check kernel configuration via secure monitor call when implemented to set memory fill values. 
+            // TODO: Check kernel configuration via secure monitor call when implemented to set memory fill values.
 
             _currentHeapAddr = HeapRegionStart;
             _heapCapacity = 0;
@@ -380,8 +376,9 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             }
         }
 
-        public KernelResult UnmapPages(ulong address, ulong pagesCount, IEnumerable<HostMemoryRange> ranges, MemoryState stateExpected)
+        public KernelResult UnmapPages(ulong address, KPageList pageList, MemoryState stateExpected)
         {
+            ulong pagesCount = pageList.GetPagesCount();
             ulong size = pagesCount * PageSize;
 
             ulong endAddr = address + size;
@@ -405,9 +402,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
             lock (_blockManager)
             {
-                var currentRanges = GetPhysicalRegions(address, size);
+                KPageList currentPageList = new KPageList();
 
-                if (!currentRanges.SequenceEqual(ranges))
+                GetPhysicalRegions(address, size, currentPageList);
+
+                if (!currentPageList.IsEqual(pageList))
                 {
                     return KernelResult.InvalidMemRange;
                 }
@@ -1690,11 +1689,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             bool send,
             out ulong dst)
         {
-            if (!SupportsMemoryAliasing)
-            {
-                throw new NotSupportedException("Memory aliasing not supported, can't map IPC buffers.");
-            }
-
             dst = 0;
 
             if (!_slabManager.CanAllocate(MaxBlocksNeededForInsertion))
@@ -1828,7 +1822,10 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             {
                 ulong alignedSize = endAddrTruncated - addressRounded;
 
-                KernelResult result = MapPages(currentVa, srcPageTable.GetPhysicalRegions(addressRounded, alignedSize), permission);
+                KPageList pageList = new KPageList();
+                srcPageTable.GetPhysicalRegions(addressRounded, alignedSize, pageList);
+
+                KernelResult result = MapPages(currentVa, pageList, permission);
 
                 if (result != KernelResult.Success)
                 {
@@ -2041,7 +2038,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 MemoryAttribute.Borrowed);
         }
 
-        public KernelResult BorrowTransferMemory(List<HostMemoryRange> ranges, ulong address, ulong size, KMemoryPermission permission)
+        public KernelResult BorrowTransferMemory(KPageList pageList, ulong address, ulong size, KMemoryPermission permission)
         {
             return SetAttributesAndChangePermission(
                 address,
@@ -2054,7 +2051,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 MemoryAttribute.None,
                 permission,
                 MemoryAttribute.Borrowed,
-                ranges);
+                pageList);
         }
 
         private KernelResult SetAttributesAndChangePermission(
@@ -2068,7 +2065,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             MemoryAttribute attributeExpected,
             KMemoryPermission newPermission,
             MemoryAttribute attributeSetMask,
-            List<HostMemoryRange> ranges = null)
+            KPageList pageList = null)
         {
             if (address + size <= address || !InsideAddrSpace(address, size))
             {
@@ -2093,7 +2090,10 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 {
                     ulong pagesCount = size / PageSize;
 
-                    ranges?.AddRange(GetPhysicalRegions(address, size));
+                    if (pageList != null)
+                    {
+                        GetPhysicalRegions(address, pagesCount * PageSize, pageList);
+                    }
 
                     if (!_slabManager.CanAllocate(MaxBlocksNeededForInsertion))
                     {
@@ -2143,7 +2143,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 MemoryAttribute.Borrowed);
         }
 
-        public KernelResult UnborrowTransferMemory(ulong address, ulong size, List<HostMemoryRange> ranges)
+        public KernelResult UnborrowTransferMemory(ulong address, ulong size, KPageList pageList)
         {
             return ClearAttributesAndChangePermission(
                 address,
@@ -2156,7 +2156,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 MemoryAttribute.Borrowed,
                 KMemoryPermission.ReadAndWrite,
                 MemoryAttribute.Borrowed,
-                ranges);
+                pageList);
         }
 
         private KernelResult ClearAttributesAndChangePermission(
@@ -2170,7 +2170,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             MemoryAttribute attributeExpected,
             KMemoryPermission newPermission,
             MemoryAttribute attributeClearMask,
-            List<HostMemoryRange> ranges = null)
+            KPageList pageList = null)
         {
             if (address + size <= address || !InsideAddrSpace(address, size))
             {
@@ -2195,11 +2195,13 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 {
                     ulong pagesCount = size / PageSize;
 
-                    if (ranges != null)
+                    if (pageList != null)
                     {
-                        var currentRanges = GetPhysicalRegions(address, size);
+                        KPageList currentPageList = new KPageList();
+
+                        GetPhysicalRegions(address, pagesCount * PageSize, currentPageList);
 
-                        if (!currentRanges.SequenceEqual(ranges))
+                        if (!currentPageList.IsEqual(pageList))
                         {
                             return KernelResult.InvalidMemRange;
                         }
@@ -2741,8 +2743,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         /// </summary>
         /// <param name="va">Virtual address of the range</param>
         /// <param name="size">Size of the range</param>
-        /// <returns>Array of physical regions</returns>
-        protected abstract IEnumerable<HostMemoryRange> GetPhysicalRegions(ulong va, ulong size);
+        /// <param name="pageList">Page list where the ranges will be added</param>
+        protected abstract void GetPhysicalRegions(ulong va, ulong size, KPageList pageList);
 
         /// <summary>
         /// Gets a read-only span of data from CPU mapped memory.
@@ -2804,16 +2806,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         protected abstract KernelResult MapPages(ulong address, KPageList pageList, KMemoryPermission permission, bool shouldFillPages = false, byte fillValue = 0);
 
         /// <summary>
-        /// Maps a region of memory into the specified host memory ranges.
-        /// </summary>
-        /// <param name="address">Destination virtual address that should be mapped</param>
-        /// <param name="ranges">Ranges of host memory that should be mapped</param>
-        /// <param name="permission">Permission of the region to be mapped</param>
-        /// <returns>Result of the mapping operation</returns>
-        /// <exception cref="NotSupportedException">The implementation does not support memory aliasing</exception>
-        protected abstract KernelResult MapPages(ulong address, IEnumerable<HostMemoryRange> ranges, KMemoryPermission permission);
-
-        /// <summary>
         /// Unmaps a region of memory that was previously mapped with one of the page mapping methods.
         /// </summary>
         /// <param name="address">Virtual address of the region to unmap</param>
diff --git a/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableHostMapped.cs b/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableHostMapped.cs
deleted file mode 100644
index 29a7b2ed..00000000
--- a/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableHostMapped.cs
+++ /dev/null
@@ -1,139 +0,0 @@
-using Ryujinx.HLE.HOS.Kernel.Common;
-using Ryujinx.Memory;
-using Ryujinx.Memory.Range;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
-namespace Ryujinx.HLE.HOS.Kernel.Memory
-{
-    class KPageTableHostMapped : KPageTableBase
-    {
-        private const int CopyChunckSize = 0x100000;
-
-        private readonly IVirtualMemoryManager _cpuMemory;
-
-        public override bool SupportsMemoryAliasing => false;
-
-        public KPageTableHostMapped(KernelContext context, IVirtualMemoryManager cpuMemory) : base(context)
-        {
-            _cpuMemory = cpuMemory;
-        }
-
-        /// <inheritdoc/>
-        protected override IEnumerable<HostMemoryRange> GetPhysicalRegions(ulong va, ulong size)
-        {
-            return _cpuMemory.GetPhysicalRegions(va, size);
-        }
-
-        /// <inheritdoc/>
-        protected override ReadOnlySpan<byte> GetSpan(ulong va, int size)
-        {
-            return _cpuMemory.GetSpan(va, size);
-        }
-
-        /// <inheritdoc/>
-        protected override KernelResult MapMemory(ulong src, ulong dst, ulong pagesCount, KMemoryPermission oldSrcPermission, KMemoryPermission newDstPermission)
-        {
-            ulong size = pagesCount * PageSize;
-
-            _cpuMemory.Map(dst, 0, size);
-
-            ulong currentSize = size;
-            while (currentSize > 0)
-            {
-                ulong copySize = Math.Min(currentSize, CopyChunckSize);
-                _cpuMemory.Write(dst, _cpuMemory.GetSpan(src, (int)copySize));
-                currentSize -= copySize;
-            }
-
-            return KernelResult.Success;
-        }
-
-        /// <inheritdoc/>
-        protected override KernelResult UnmapMemory(ulong dst, ulong src, ulong pagesCount, KMemoryPermission oldDstPermission, KMemoryPermission newSrcPermission)
-        {
-            ulong size = pagesCount * PageSize;
-
-            // TODO: Validation.
-
-            ulong currentSize = size;
-            while (currentSize > 0)
-            {
-                ulong copySize = Math.Min(currentSize, CopyChunckSize);
-                _cpuMemory.Write(src, _cpuMemory.GetSpan(dst, (int)copySize));
-                currentSize -= copySize;
-            }
-
-            _cpuMemory.Unmap(dst, size);
-            return KernelResult.Success;
-        }
-
-        /// <inheritdoc/>
-        protected override KernelResult MapPages(ulong dstVa, ulong pagesCount, ulong srcPa, KMemoryPermission permission, bool shouldFillPages, byte fillValue)
-        {
-            _cpuMemory.Map(dstVa, 0, pagesCount * PageSize);
-
-            if (shouldFillPages)
-            {
-                _cpuMemory.Fill(dstVa, pagesCount * PageSize, fillValue);
-            }
-
-            return KernelResult.Success;
-        }
-
-        /// <inheritdoc/>
-        protected override KernelResult MapPages(ulong address, KPageList pageList, KMemoryPermission permission, bool shouldFillPages, byte fillValue)
-        {
-            ulong pagesCount = pageList.GetPagesCount();
-
-            _cpuMemory.Map(address, 0, pagesCount * PageSize);
-
-            if (shouldFillPages)
-            {
-                _cpuMemory.Fill(address, pagesCount * PageSize, fillValue);
-            }
-
-            return KernelResult.Success;
-        }
-
-        /// <inheritdoc/>
-        protected override KernelResult MapPages(ulong address, IEnumerable<HostMemoryRange> ranges, KMemoryPermission permission)
-        {
-            throw new NotSupportedException();
-        }
-
-        /// <inheritdoc/>
-        protected override KernelResult Unmap(ulong address, ulong pagesCount)
-        {
-            _cpuMemory.Unmap(address, pagesCount * PageSize);
-            return KernelResult.Success;
-        }
-
-        /// <inheritdoc/>
-        protected override KernelResult Reprotect(ulong address, ulong pagesCount, KMemoryPermission permission)
-        {
-            // TODO.
-            return KernelResult.Success;
-        }
-
-        /// <inheritdoc/>
-        protected override KernelResult ReprotectWithAttributes(ulong address, ulong pagesCount, KMemoryPermission permission)
-        {
-            // TODO.
-            return KernelResult.Success;
-        }
-
-        /// <inheritdoc/>
-        protected override void SignalMemoryTracking(ulong va, ulong size, bool write)
-        {
-            _cpuMemory.SignalMemoryTracking(va, size, write);
-        }
-
-        /// <inheritdoc/>
-        protected override void Write(ulong va, ReadOnlySpan<byte> data)
-        {
-            _cpuMemory.Write(va, data);
-        }
-    }
-}
diff --git a/Ryujinx.HLE/HOS/Kernel/Memory/KSharedMemory.cs b/Ryujinx.HLE/HOS/Kernel/Memory/KSharedMemory.cs
index 4e516842..3711b9df 100644
--- a/Ryujinx.HLE/HOS/Kernel/Memory/KSharedMemory.cs
+++ b/Ryujinx.HLE/HOS/Kernel/Memory/KSharedMemory.cs
@@ -6,7 +6,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 {
     class KSharedMemory : KAutoObject
     {
-        private readonly SharedMemoryStorage _storage;
+        private readonly KPageList _pageList;
 
         private readonly ulong _ownerPid;
 
@@ -20,7 +20,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             KMemoryPermission ownerPermission,
             KMemoryPermission userPermission) : base(context)
         {
-            _storage = storage;
+            _pageList = storage.GetPageList();
             _ownerPid = ownerPid;
             _ownerPermission = ownerPermission;
             _userPermission = userPermission;
@@ -33,10 +33,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             KProcess process,
             KMemoryPermission permission)
         {
-            ulong pagesCountRounded = BitUtils.DivRoundUp(size, KPageTableBase.PageSize);
-
-            var pageList = _storage.GetPageList();
-            if (pageList.GetPagesCount() != pagesCountRounded)
+            if (_pageList.GetPagesCount() != BitUtils.DivRoundUp(size, KPageTableBase.PageSize))
             {
                 return KernelResult.InvalidSize;
             }
@@ -50,35 +47,17 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 return KernelResult.InvalidPermission;
             }
 
-            KernelResult result = memoryManager.MapPages(address, pageList, MemoryState.SharedMemory, permission);
-
-            if (result == KernelResult.Success && !memoryManager.SupportsMemoryAliasing)
-            {
-                _storage.Borrow(process, address);
-            }
-
-            return result;
+            return memoryManager.MapPages(address, _pageList, MemoryState.SharedMemory, permission);
         }
 
-        public KernelResult UnmapFromProcess(
-            KPageTableBase memoryManager,
-            ulong address,
-            ulong size,
-            KProcess process)
+        public KernelResult UnmapFromProcess(KPageTableBase memoryManager, ulong address, ulong size, KProcess process)
         {
-            ulong pagesCountRounded = BitUtils.DivRoundUp(size, KPageTableBase.PageSize);
-
-            var pageList = _storage.GetPageList();
-            ulong pagesCount = pageList.GetPagesCount();
-
-            if (pagesCount != pagesCountRounded)
+            if (_pageList.GetPagesCount() != BitUtils.DivRoundUp(size, KPageTableBase.PageSize))
             {
                 return KernelResult.InvalidSize;
             }
 
-            var ranges = _storage.GetRanges();
-
-            return memoryManager.UnmapPages(address, pagesCount, ranges, MemoryState.SharedMemory);
+            return memoryManager.UnmapPages(address, _pageList, MemoryState.SharedMemory);
         }
     }
 }
 \ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Kernel/Memory/KTransferMemory.cs b/Ryujinx.HLE/HOS/Kernel/Memory/KTransferMemory.cs
index 3051d998..107f04c9 100644
--- a/Ryujinx.HLE/HOS/Kernel/Memory/KTransferMemory.cs
+++ b/Ryujinx.HLE/HOS/Kernel/Memory/KTransferMemory.cs
@@ -1,9 +1,7 @@
 using Ryujinx.Common;
 using Ryujinx.HLE.HOS.Kernel.Common;
 using Ryujinx.HLE.HOS.Kernel.Process;
-using Ryujinx.Memory.Range;
 using System;
-using System.Collections.Generic;
 
 namespace Ryujinx.HLE.HOS.Kernel.Memory
 {
@@ -14,9 +12,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         // TODO: Remove when we no longer need to read it from the owner directly.
         public KProcess Creator => _creator;
 
-        private readonly List<HostMemoryRange> _ranges;
-
-        private readonly SharedMemoryStorage _storage;
+        private readonly KPageList _pageList;
 
         public ulong Address { get; private set; }
         public ulong Size { get; private set; }
@@ -28,12 +24,12 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
         public KTransferMemory(KernelContext context) : base(context)
         {
-            _ranges = new List<HostMemoryRange>();
+            _pageList = new KPageList();
         }
 
         public KTransferMemory(KernelContext context, SharedMemoryStorage storage) : base(context)
         {
-            _storage = storage;
+            _pageList = storage.GetPageList();
             Permission = KMemoryPermission.ReadAndWrite;
 
             _hasBeenInitialized = true;
@@ -46,7 +42,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
             _creator = creator;
 
-            KernelResult result = creator.MemoryManager.BorrowTransferMemory(_ranges, address, size, permission);
+            KernelResult result = creator.MemoryManager.BorrowTransferMemory(_pageList, address, size, permission);
 
             if (result != KernelResult.Success)
             {
@@ -71,15 +67,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             KProcess process,
             KMemoryPermission permission)
         {
-            if (_storage == null)
-            {
-                throw new NotImplementedException();
-            }
-
-            ulong pagesCountRounded = BitUtils.DivRoundUp(size, KPageTableBase.PageSize);
-
-            var pageList = _storage.GetPageList();
-            if (pageList.GetPagesCount() != pagesCountRounded)
+            if (_pageList.GetPagesCount() != BitUtils.DivRoundUp(size, KPageTableBase.PageSize))
             {
                 return KernelResult.InvalidSize;
             }
@@ -91,16 +79,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
             MemoryState state = Permission == KMemoryPermission.None ? MemoryState.TransferMemoryIsolated : MemoryState.TransferMemory;
 
-            KernelResult result = memoryManager.MapPages(address, pageList, state, KMemoryPermission.ReadAndWrite);
+            KernelResult result = memoryManager.MapPages(address, _pageList, state, KMemoryPermission.ReadAndWrite);
 
             if (result == KernelResult.Success)
             {
                 _isMapped = true;
-
-                if (!memoryManager.SupportsMemoryAliasing)
-                {
-                    _storage.Borrow(process, address);
-                }
             }
 
             return result;
@@ -112,26 +95,14 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             ulong size,
             KProcess process)
         {
-            if (_storage == null)
-            {
-                throw new NotImplementedException();
-            }
-
-            ulong pagesCountRounded = BitUtils.DivRoundUp(size, KPageTableBase.PageSize);
-
-            var pageList = _storage.GetPageList();
-            ulong pagesCount = pageList.GetPagesCount();
-
-            if (pagesCount != pagesCountRounded)
+            if (_pageList.GetPagesCount() != BitUtils.DivRoundUp(size, KPageTableBase.PageSize))
             {
                 return KernelResult.InvalidSize;
             }
 
-            var ranges = _storage.GetRanges();
-
             MemoryState state = Permission == KMemoryPermission.None ? MemoryState.TransferMemoryIsolated : MemoryState.TransferMemory;
 
-            KernelResult result = memoryManager.UnmapPages(address, pagesCount, ranges, state);
+            KernelResult result = memoryManager.UnmapPages(address, _pageList, state);
 
             if (result == KernelResult.Success)
             {
@@ -145,7 +116,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         {
             if (_hasBeenInitialized)
             {
-                if (!_isMapped && _creator.MemoryManager.UnborrowTransferMemory(Address, Size, _ranges) != KernelResult.Success)
+                if (!_isMapped && _creator.MemoryManager.UnborrowTransferMemory(Address, Size, _pageList) != KernelResult.Success)
                 {
                     throw new InvalidOperationException("Unexpected failure restoring transfer memory attributes.");
                 }
diff --git a/Ryujinx.HLE/HOS/Kernel/Memory/SharedMemoryStorage.cs b/Ryujinx.HLE/HOS/Kernel/Memory/SharedMemoryStorage.cs
index cd22b65f..167e0aa9 100644
--- a/Ryujinx.HLE/HOS/Kernel/Memory/SharedMemoryStorage.cs
+++ b/Ryujinx.HLE/HOS/Kernel/Memory/SharedMemoryStorage.cs
@@ -1,8 +1,4 @@
-using Ryujinx.HLE.HOS.Kernel.Process;
-using Ryujinx.Memory;
-using Ryujinx.Memory.Range;
-using System;
-using System.Collections.Generic;
+using System;
 
 namespace Ryujinx.HLE.HOS.Kernel.Memory
 {
@@ -12,9 +8,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         private readonly KPageList _pageList;
         private readonly ulong _size;
 
-        private IVirtualMemoryManager _borrowerMemory;
-        private ulong _borrowerVa;
-
         public SharedMemoryStorage(KernelContext context, KPageList pageList)
         {
             _context = context;
@@ -29,24 +22,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             }
         }
 
-        public void Borrow(KProcess dstProcess, ulong va)
-        {
-            ulong currentOffset = 0;
-
-            foreach (KPageNode pageNode in _pageList)
-            {
-                ulong address = pageNode.Address - DramMemoryMap.DramBase;
-                ulong size = pageNode.PagesCount * KPageTableBase.PageSize;
-
-                dstProcess.CpuMemory.Write(va + currentOffset, _context.Memory.GetSpan(address + currentOffset, (int)size));
-
-                currentOffset += size;
-            }
-
-            _borrowerMemory = dstProcess.CpuMemory;
-            _borrowerVa = va;
-        }
-
         public void ZeroFill()
         {
             for (ulong offset = 0; offset < _size; offset += sizeof(ulong))
@@ -57,42 +32,13 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
         public ref T GetRef<T>(ulong offset) where T : unmanaged
         {
-            if (_borrowerMemory == null)
+            if (_pageList.Nodes.Count == 1)
             {
-                if (_pageList.Nodes.Count == 1)
-                {
-                    ulong address = _pageList.Nodes.First.Value.Address - DramMemoryMap.DramBase;
-                    return ref _context.Memory.GetRef<T>(address + offset);
-                }
-
-                throw new NotImplementedException("Non-contiguous shared memory is not yet supported.");
-            }
-            else
-            {
-                return ref _borrowerMemory.GetRef<T>(_borrowerVa + offset);
+                ulong address = _pageList.Nodes.First.Value.Address - DramMemoryMap.DramBase;
+                return ref _context.Memory.GetRef<T>(address + offset);
             }
-        }
-
-        public IEnumerable<HostMemoryRange> GetRanges()
-        {
-            if (_borrowerMemory == null)
-            {
-                var ranges = new List<HostMemoryRange>();
-
-                foreach (KPageNode pageNode in _pageList)
-                {
-                    ulong address = pageNode.Address - DramMemoryMap.DramBase;
-                    ulong size = pageNode.PagesCount * KPageTableBase.PageSize;
-
-                    ranges.Add(new HostMemoryRange(_context.Memory.GetPointer(address, size), size));
-                }
 
-                return ranges;
-            }
-            else
-            {
-                return _borrowerMemory.GetPhysicalRegions(_borrowerVa, _size);
-            }
+            throw new NotImplementedException("Non-contiguous shared memory is not yet supported.");
         }
 
         public KPageList GetPageList()