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Support memory aliasing (#2954)

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* Back to the origins: Make memory manager take guest PA rather than host address once again

* Direct mapping with alias support on Windows

* Fixes and remove more of the emulated shared memory

* Linux support

* Make shared and transfer memory not depend on SharedMemoryStorage

* More efficient view mapping on Windows (no more restricted to 4KB pages at a time)

* Handle potential access violations caused by partial unmap

* Implement host mapping using shared memory on Linux

* Add new GetPhysicalAddressChecked method, used to ensure the virtual address is mapped before address translation

Also align GetRef behaviour with software memory manager

* We don't need a mirrorable memory block for software memory manager mode

* Disable memory aliasing tests while we don't have shared memory support on Mac

* Shared memory & SIGBUS handler for macOS

* Fix typo + nits + re-enable memory tests

* Set MAP_JIT_DARWIN on x86 Mac too

* Add back the address space mirror

* Only set MAP_JIT_DARWIN if we are mapping as executable

* Disable aliasing tests again (still fails on Mac)

* Fix UnmapView4KB (by not casting size to int)

* Use ref counting on memory blocks to delay closing the shared memory handle until all blocks using it are disposed

* Address PR feedback

* Make RO hold a reference to the guest process memory manager to avoid early disposal

Co-authored-by: nastys <nastys@users.noreply.github.com>
This commit is contained in:
gdkchan 2022-05-02 20:30:02 -03:00 • committed by GitHub
parent 4a892fbdc9
commit 95017b8c66
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41 changed files with 2373 additions and 2155 deletions
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78
Ryujinx.HLE/HOS/Kernel/Memory/KPageTable.cs
View file

@ -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)
{
@ -136,33 +139,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
return KernelResult.Success;
}
/// <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)
{
@ -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;
}
}
}