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Remove unused physical region tracking (#2085)

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* Remove unused physical region tracking

* Update comments
This commit is contained in:
riperiperi 2021-03-06 23:21:53 +00:00 • committed by GitHub
parent 8d36681bf1
commit a539303e71
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7 changed files with 24 additions and 316 deletions
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97
Ryujinx.Memory/Tracking/MemoryTracking.cs
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@ -13,11 +13,9 @@ namespace Ryujinx.Memory.Tracking
// Only use these from within the lock.
private readonly NonOverlappingRangeList<VirtualRegion> _virtualRegions;
private readonly NonOverlappingRangeList<PhysicalRegion> _physicalRegions;
// Only use these from within the lock.
private readonly VirtualRegion[] _virtualResults = new VirtualRegion[10];
private readonly PhysicalRegion[] _physicalResults = new PhysicalRegion[10];
private readonly int _pageSize;
@ -43,7 +41,6 @@ namespace Ryujinx.Memory.Tracking
_pageSize = pageSize;
_virtualRegions = new NonOverlappingRangeList<VirtualRegion>();
_physicalRegions = new NonOverlappingRangeList<PhysicalRegion>();
}
private (ulong address, ulong size) PageAlign(ulong address, ulong size)
@ -82,7 +79,6 @@ namespace Ryujinx.Memory.Tracking
region.SignalMappingChanged(true);
}
region.RecalculatePhysicalChildren();
region.UpdateProtection();
}
}
@ -90,14 +86,14 @@ namespace Ryujinx.Memory.Tracking
/// <summary>
/// Indicate that a virtual region has been unmapped.
/// Should be called after the unmapping is complete.
/// Should be called before the unmapping is complete.
/// </summary>
/// <param name="va">Virtual memory address</param>
/// <param name="size">Size to be unmapped</param>
public void Unmap(ulong va, ulong size)
{
// An unmapping may mean we need to re-evaluate each VirtualRegion's affected area.
// Find all handles that overlap with the range, we need to recalculate their physical regions
// Find all handles that overlap with the range, we need to notify them that the region was unmapped.
lock (TrackingLock)
{
@ -107,8 +103,8 @@ namespace Ryujinx.Memory.Tracking
for (int i = 0; i < count; i++)
{
VirtualRegion region = results[i];
region.SignalMappingChanged(false);
region.RecalculatePhysicalChildren();
}
}
}
@ -127,31 +123,6 @@ namespace Ryujinx.Memory.Tracking
return result;
}
/// <summary>
/// Get a list of physical regions that a virtual region covers.
/// Note that this becomes outdated if the virtual or physical regions are unmapped or remapped.
/// </summary>
/// <param name="va">Virtual memory address</param>
/// <param name="size">Size of the virtual region</param>
/// <returns>A list of physical regions the virtual region covers</returns>
internal List<PhysicalRegion> GetPhysicalRegionsForVirtual(ulong va, ulong size)
{
List<PhysicalRegion> result = new List<PhysicalRegion>();
// Get a list of physical regions for this virtual region, from our injected virtual mapping function.
(ulong Address, ulong Size)[] physicalRegions = _memoryManager.GetPhysicalRegions(va, size);
if (physicalRegions != null)
{
foreach (var region in physicalRegions)
{
_physicalRegions.GetOrAddRegions(result, region.Address, region.Size, (pa, size) => new PhysicalRegion(this, pa, size));
}
}
return result;
}
/// <summary>
/// Remove a virtual region from the range list. This assumes that the lock has been acquired.
/// </summary>
@ -161,15 +132,6 @@ namespace Ryujinx.Memory.Tracking
_virtualRegions.Remove(region);
}
/// <summary>
/// Remove a physical region from the range list. This assumes that the lock has been acquired.
/// </summary>
/// <param name="region">Region to remove</param>
internal void RemovePhysical(PhysicalRegion region)
{
_physicalRegions.Remove(region);
}
/// <summary>
/// Obtains a memory tracking handle for the given virtual region, with a specified granularity. This should be disposed when finished with.
/// </summary>
@ -216,38 +178,6 @@ namespace Ryujinx.Memory.Tracking
}
}
/// <summary>
/// Signal that a physical memory event happened at the given location.
/// </summary>
/// <param name="address">Physical address accessed</param>
/// <param name="write">Whether the region was written to or read</param>
/// <returns>True if the event triggered any tracking regions, false otherwise</returns>
public bool PhysicalMemoryEvent(ulong address, bool write)
{
// Look up the physical region using the region list.
// Signal up the chain to relevant handles.
lock (TrackingLock)
{
var results = _physicalResults;
int count = _physicalRegions.FindOverlapsNonOverlapping(address, 1, ref results); // TODO: get/use the actual access size?
if (count == 0)
{
_block.Reprotect(address & ~(ulong)(_pageSize - 1), (ulong)_pageSize, MemoryPermission.ReadAndWrite);
return false; // We can't handle this - unprotect and return.
}
for (int i = 0; i < count; i++)
{
PhysicalRegion region = results[i];
region.Signal(address, 1, write);
}
}
return true;
}
/// <summary>
/// Signal that a virtual memory event happened at the given location (one byte).
/// </summary>
@ -292,19 +222,6 @@ namespace Ryujinx.Memory.Tracking
return true;
}
/// <summary>
/// Reprotect a given physical region, if enabled. This is protected on the memory block provided during initialization.
/// </summary>
/// <param name="region">Region to reprotect</param>
/// <param name="permission">Memory permission to protect with</param>
internal void ProtectPhysicalRegion(PhysicalRegion region, MemoryPermission permission)
{
if (EnablePhysicalProtection)
{
_block.Reprotect(region.Address, region.Size, permission);
}
}
/// <summary>
/// Reprotect a given virtual region. The virtual memory manager will handle this.
/// </summary>
@ -316,15 +233,15 @@ namespace Ryujinx.Memory.Tracking
}
/// <summary>
/// Returns the number of virtual and physical regions currently being tracked.
/// Returns the number of virtual regions currently being tracked.
/// Useful for tests and metrics.
/// </summary>
/// <returns>The number of virtual regions, and the number of physical regions</returns>
public (int VirtualCount, int PhysicalCount) GetRegionCounts()
/// <returns>The number of virtual regions</returns>
public int GetRegionCount()
{
lock (TrackingLock)
{
return (_virtualRegions.Count, _physicalRegions.Count);
return _virtualRegions.Count;
}
}
}