Re: [PATCH 4/6] Implement Hyper-V MSRs

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Alexander Graf wrote:
   case MSR_VM_CR:
+    case 0x40000081:
       *data = 0;
       break;


This probably is a Hyper-V MSR, but I don't see how it expects it to be present in real hardware. Are you sure this is really needed?

Well hyper-v just crashes/reboots if it get a #gp on that msr, so I suppose yes.

This is suspicious.  It won't get this MSR on real hardware.

Maybe this was with cpuid.hypervisor enabled?

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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