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LightningJit: Disable some cache ops and CTR_EL0 access on Windows Arm (#6326)

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* LightningJit: Disable some cache ops and CTR_EL0 access on Windows Arm

* Format whitespace

* Delete unused code

* Fix typo

Co-authored-by: riperiperi <rhy3756547@hotmail.com>

---------

Co-authored-by: riperiperi <rhy3756547@hotmail.com>
This commit is contained in:
gdkchan
2024-03-07 20:55:54 -03:00
committed by GitHub
parent dda0f26067
commit 50458b2472
5 changed files with 74 additions and 5 deletions
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15
src/Ryujinx.Cpu/LightningJit/Arm64/Target/Arm64/InstEmitSystem.cs
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@@ -69,7 +69,7 @@ namespace Ryujinx.Cpu.LightningJit.Arm64.Target.Arm64
asm.LdrRiUn(Register((int)rd), Register(regAlloc.FixedContextRegister), NativeContextOffsets.TpidrEl0Offset);
}
}
else if ((encoding & ~0x1f) == 0xd53b0020 && IsAppleOS()) // mrs x0, ctr_el0
else if ((encoding & ~0x1f) == 0xd53b0020 && IsCtrEl0AccessForbidden()) // mrs x0, ctr_el0
{
uint rd = encoding & 0x1f;
@@ -115,7 +115,7 @@ namespace Ryujinx.Cpu.LightningJit.Arm64.Target.Arm64
{
return true;
}
else if ((encoding & ~0x1f) == 0xd53b0020 && IsAppleOS()) // mrs x0, ctr_el0
else if ((encoding & ~0x1f) == 0xd53b0020 && IsCtrEl0AccessForbidden()) // mrs x0, ctr_el0
{
return true;
}
@@ -127,9 +127,16 @@ namespace Ryujinx.Cpu.LightningJit.Arm64.Target.Arm64
return false;
}
private static bool IsAppleOS()
private static bool IsCtrEl0AccessForbidden()
{
return OperatingSystem.IsMacOS() || OperatingSystem.IsIOS();
// Only Linux allows accessing CTR_EL0 from user mode.
return OperatingSystem.IsWindows() || OperatingSystem.IsMacOS() || OperatingSystem.IsIOS();
}
public static bool IsCacheInstForbidden(uint encoding)
{
// Windows does not allow the cache maintenance instructions to be used from user mode.
return OperatingSystem.IsWindows() && SysUtils.IsCacheInstUciTrapped(encoding);
}
public static bool NeedsContextStoreLoad(InstName name)