VMBus: Revert commit fc424c5

Author: Goldfish64

Changelog.md

@@ -4,7 +4,6 @@ MacHyperVSupport Changelog
 - Created daemons for each userspace function replacing hvutil
 - Added support for host to guest file copy (Guest Services integration service)
 - Fixed very high storage latency when heaving network I/O is occurring
-- Added support for assigning channel interrupts to multiple cores
 
 #### v0.9.2
 - Fixed crash when control key is pressed under macOS 10.4

Docs/modules.md

@@ -131,7 +131,6 @@ Provides root of VMBus devices and services.
 | Boot argument  | Description |
 |----------------|-------------|
 | -hvvmbusdbg    | Enables debug printing in DEBUG builds
-| -hvvmbusnocpu  | Force all channels to use CPU 0 on Windows Server 2012 / Windows 8 and newer.
 
 ## VMBus Device Nub (HyperVVMBusDevice)
 Provides connection nub for child VMBus device modules.

MacHyperVSupport/VMBus/HyperVVMBusChannel.cpp

@@ -99,11 +99,12 @@ IOReturn HyperVVMBus::openVMBusChannel(UInt32 channelId, UInt32 txBufferSize, VM
 
   //
   // Windows Server 2012 / Windows 8, and newer, support specific CPUs for interrupts.
+  // TODO: Does not work on newer versions like Monterey, interrupts on other CPUs never arrive.
   //
-  if (_vmbusVersion >= kVMBusVersionWIN8 && !checkKernelArgument("-hvvmbusnocpu")) {
+  /*if (_vmbusVersion >= kVMBusVersionWIN8 && !checkKernelArgument("-hvvmbusnocpu")) {
     openMsg.targetCpu = channelId % real_ncpus;
-    HVDBGLOG("Channel target CPU: %u", openMsg.targetCpu);
   }
+  HVDBGLOG("Channel %u target CPU: %u", channelId, openMsg.targetCpu);*/
 
   //
   // Send channel open message to Hyper-V and wait for response.