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Add VTimer as alternative interrupt method on Apple Hypervisor (#5663)

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* Add VTimer as alternative interrupt method on Apple Hypervisor

* Fix naming violations on TimeApi

* Fix timer interval (was 16us rather than 16ms)

* Fix delta ticks calculation

* Missing ThrowOnError call

* Add SupportedOSPlatform attribute on AppleHv classes
This commit is contained in:
gdkchan 2023-09-25 20:18:32 -03:00 committed by GitHub
parent d6d3cdd573
commit ddc9ae2a83
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GPG key ID: 4AEE18F83AFDEB23
16 changed files with 114 additions and 31 deletions
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2
src/Ryujinx.Cpu/AppleHv/HvAddressSpace.cs
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@ -1,9 +1,11 @@
using Ryujinx.Cpu.AppleHv.Arm;
using Ryujinx.Memory;
using System;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
class HvAddressSpace : IDisposable
{
private const ulong KernelRegionBase = unchecked((ulong)-(1L << 39));

2
src/Ryujinx.Cpu/AppleHv/HvAddressSpaceRange.cs
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@ -2,10 +2,12 @@ using Ryujinx.Cpu.AppleHv.Arm;
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Threading;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
class HvAddressSpaceRange : IDisposable
{
private const ulong AllocationGranule = 1UL << 14;

12
src/Ryujinx.Cpu/AppleHv/HvApi.cs
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@ -1,5 +1,6 @@
using System;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
@ -12,10 +13,18 @@ namespace Ryujinx.Cpu.AppleHv
#pragma warning restore CS0649
}
enum HvExitReason : uint
{
Canceled,
Exception,
VTimerActivated,
Unknown,
}
struct HvVcpuExit
{
#pragma warning disable CS0649 // Field is never assigned to
public uint Reason;
public HvExitReason Reason;
public HvVcpuExitException Exception;
#pragma warning restore CS0649
}
@ -255,6 +264,7 @@ namespace Ryujinx.Cpu.AppleHv
}
}
[SupportedOSPlatform("macos")]
static partial class HvApi
{
public const string LibraryName = "/System/Library/Frameworks/Hypervisor.framework/Hypervisor";

2
src/Ryujinx.Cpu/AppleHv/HvCpuContext.cs
View file

@ -1,7 +1,9 @@
using ARMeilleure.Memory;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
class HvCpuContext : ICpuContext
{
private readonly ITickSource _tickSource;

2
src/Ryujinx.Cpu/AppleHv/HvEngine.cs
View file

@ -1,7 +1,9 @@
using ARMeilleure.Memory;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
public class HvEngine : ICpuEngine
{
private readonly ITickSource _tickSource;

31
src/Ryujinx.Cpu/AppleHv/HvExecutionContext.cs
View file

@ -2,9 +2,12 @@ using ARMeilleure.State;
using Ryujinx.Cpu.AppleHv.Arm;
using Ryujinx.Memory.Tracking;
using System;
using System.Runtime.Versioning;
using System.Threading;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
class HvExecutionContext : IExecutionContext
{
/// <inheritdoc/>
@ -67,6 +70,8 @@ namespace Ryujinx.Cpu.AppleHv
private readonly ExceptionCallbacks _exceptionCallbacks;
private int _interruptRequested;
public HvExecutionContext(ICounter counter, ExceptionCallbacks exceptionCallbacks)
{
_counter = counter;
@ -111,7 +116,15 @@ namespace Ryujinx.Cpu.AppleHv
/// <inheritdoc/>
public void RequestInterrupt()
{
_impl.RequestInterrupt();
if (Interlocked.Exchange(ref _interruptRequested, 1) == 0 && _impl is HvExecutionContextVcpu impl)
{
impl.RequestInterrupt();
}
}
private bool GetAndClearInterruptRequested()
{
return Interlocked.Exchange(ref _interruptRequested, 0) != 0;
}
/// <inheritdoc/>
@ -131,9 +144,9 @@ namespace Ryujinx.Cpu.AppleHv
{
HvApi.hv_vcpu_run(vcpu.Handle).ThrowOnError();
uint reason = vcpu.ExitInfo->Reason;
HvExitReason reason = vcpu.ExitInfo->Reason;
if (reason == 1)
if (reason == HvExitReason.Exception)
{
uint hvEsr = (uint)vcpu.ExitInfo->Exception.Syndrome;
ExceptionClass hvEc = (ExceptionClass)(hvEsr >> 26);
@ -146,14 +159,22 @@ namespace Ryujinx.Cpu.AppleHv
address = SynchronousException(memoryManager, ref vcpu);
HvApi.hv_vcpu_set_reg(vcpu.Handle, HvReg.PC, address).ThrowOnError();
}
else if (reason == 0)
else if (reason == HvExitReason.Canceled || reason == HvExitReason.VTimerActivated)
{
if (_impl.GetAndClearInterruptRequested())
if (GetAndClearInterruptRequested())
{
ReturnToPool(vcpu);
InterruptHandler();
vcpu = RentFromPool(memoryManager.AddressSpace, vcpu);
}
if (reason == HvExitReason.VTimerActivated)
{
vcpu.EnableAndUpdateVTimer();
// Unmask VTimer interrupts.
HvApi.hv_vcpu_set_vtimer_mask(vcpu.Handle, false).ThrowOnError();
}
}
else
{

9
src/Ryujinx.Cpu/AppleHv/HvExecutionContextShadow.cs
View file

@ -46,14 +46,5 @@ namespace Ryujinx.Cpu.AppleHv
{
_v[index] = value;
}
public void RequestInterrupt()
{
}
public bool GetAndClearInterruptRequested()
{
return false;
}
}
}

16
src/Ryujinx.Cpu/AppleHv/HvExecutionContextVcpu.cs
View file

@ -2,10 +2,11 @@ using ARMeilleure.State;
using Ryujinx.Memory;
using System;
using System.Runtime.InteropServices;
using System.Threading;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
class HvExecutionContextVcpu : IHvExecutionContext
{
private static readonly MemoryBlock _setSimdFpRegFuncMem;
@ -135,7 +136,6 @@ namespace Ryujinx.Cpu.AppleHv
}
private readonly ulong _vcpu;
private int _interruptRequested;
public HvExecutionContextVcpu(ulong vcpu)
{
@ -181,16 +181,8 @@ namespace Ryujinx.Cpu.AppleHv
public void RequestInterrupt()
{
if (Interlocked.Exchange(ref _interruptRequested, 1) == 0)
{
ulong vcpu = _vcpu;
HvApi.hv_vcpus_exit(ref vcpu, 1);
}
}
public bool GetAndClearInterruptRequested()
{
return Interlocked.Exchange(ref _interruptRequested, 0) != 0;
ulong vcpu = _vcpu;
HvApi.hv_vcpus_exit(ref vcpu, 1);
}
}
}

2
src/Ryujinx.Cpu/AppleHv/HvMemoryBlockAllocation.cs
View file

@ -1,8 +1,10 @@
using Ryujinx.Memory;
using System;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
readonly struct HvMemoryBlockAllocation : IDisposable
{
private readonly HvMemoryBlockAllocator _owner;

2
src/Ryujinx.Cpu/AppleHv/HvMemoryBlockAllocator.cs
View file

@ -1,7 +1,9 @@
using Ryujinx.Memory;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
class HvMemoryBlockAllocator : PrivateMemoryAllocatorImpl<HvMemoryBlockAllocator.Block>
{
public class Block : PrivateMemoryAllocator.Block

2
src/Ryujinx.Cpu/AppleHv/HvMemoryManager.cs
View file

@ -7,6 +7,7 @@ using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Threading;
namespace Ryujinx.Cpu.AppleHv
@ -14,6 +15,7 @@ namespace Ryujinx.Cpu.AppleHv
/// <summary>
/// Represents a CPU memory manager which maps guest virtual memory directly onto the Hypervisor page table.
/// </summary>
[SupportedOSPlatform("macos")]
public class HvMemoryManager : MemoryManagerBase, IMemoryManager, IVirtualMemoryManagerTracked, IWritableBlock
{
public const int PageBits = 12;

31
src/Ryujinx.Cpu/AppleHv/HvVcpu.cs
View file

@ -1,7 +1,15 @@
using System.Diagnostics;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
unsafe class HvVcpu
{
private const ulong InterruptIntervalNs = 16 * 1000000; // 16 ms
private static ulong _interruptTimeDeltaTicks = 0;
public readonly ulong Handle;
public readonly HvVcpuExit* ExitInfo;
public readonly IHvExecutionContext ShadowContext;
@ -21,5 +29,28 @@ namespace Ryujinx.Cpu.AppleHv
NativeContext = nativeContext;
IsEphemeral = isEphemeral;
}
public void EnableAndUpdateVTimer()
{
// We need to ensure interrupts will be serviced,
// and for that we set up the VTime to trigger an interrupt at fixed intervals.
ulong deltaTicks = _interruptTimeDeltaTicks;
if (deltaTicks == 0)
{
// Calculate our time delta in ticks based on the current clock frequency.
int result = TimeApi.mach_timebase_info(out var timeBaseInfo);
Debug.Assert(result == 0);
deltaTicks = ((InterruptIntervalNs * timeBaseInfo.Denom) + (timeBaseInfo.Numer - 1)) / timeBaseInfo.Numer;
_interruptTimeDeltaTicks = deltaTicks;
}
HvApi.hv_vcpu_set_sys_reg(Handle, HvSysReg.CNTV_CTL_EL0, 1).ThrowOnError();
HvApi.hv_vcpu_set_sys_reg(Handle, HvSysReg.CNTV_CVAL_EL0, TimeApi.mach_absolute_time() + deltaTicks).ThrowOnError();
}
}
}

4
src/Ryujinx.Cpu/AppleHv/HvVcpuPool.cs
View file

@ -1,8 +1,10 @@
using System;
using System.Runtime.Versioning;
using System.Threading;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
class HvVcpuPool
{
// Since there's a limit on the number of VCPUs we can create,
@ -81,6 +83,8 @@ namespace Ryujinx.Cpu.AppleHv
HvVcpu vcpu = new(vcpuHandle, exitInfo, shadowContext, nativeContext, isEphemeral);
vcpu.EnableAndUpdateVTimer();
return vcpu;
}

2
src/Ryujinx.Cpu/AppleHv/HvVm.cs
View file

@ -1,8 +1,10 @@
using Ryujinx.Memory;
using System;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
[SupportedOSPlatform("macos")]
static class HvVm
{
// This alignment allows us to use larger blocks on the page table.

5
src/Ryujinx.Cpu/AppleHv/IHvExecutionContext.cs
View file

@ -2,7 +2,7 @@ using ARMeilleure.State;
namespace Ryujinx.Cpu.AppleHv
{
public interface IHvExecutionContext
interface IHvExecutionContext
{
ulong Pc { get; set; }
ulong ElrEl1 { get; set; }
@ -39,8 +39,5 @@ namespace Ryujinx.Cpu.AppleHv
SetV(i, context.GetV(i));
}
}
void RequestInterrupt();
bool GetAndClearInterruptRequested();
}
}

21
src/Ryujinx.Cpu/AppleHv/TimeApi.cs Normal file
View file

@ -0,0 +1,21 @@
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
namespace Ryujinx.Cpu.AppleHv
{
struct MachTimebaseInfo
{
public uint Numer;
public uint Denom;
}
[SupportedOSPlatform("macos")]
static partial class TimeApi
{
[LibraryImport("libc", SetLastError = true)]
public static partial ulong mach_absolute_time();
[LibraryImport("libc", SetLastError = true)]
public static partial int mach_timebase_info(out MachTimebaseInfo info);
}
}