<!--
{
  "availability" : [
    "macOS: 10.10.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Hypervisor",
  "identifier" : "/documentation/Hypervisor/hv_vcpu_enable_native_msr(_:_:_:)",
  "metadataVersion" : "0.1.0",
  "role" : "Function",
  "symbol" : {
    "kind" : "Function",
    "modules" : [
      "Hypervisor"
    ],
    "preciseIdentifier" : "c:@F@hv_vcpu_enable_native_msr"
  },
  "title" : "hv_vcpu_enable_native_msr(_:_:_:)"
}
-->

# hv_vcpu_enable_native_msr(_:_:_:)

Enables or disables a Model-Specific Register (MSR) that the VM uses natively.

```
func hv_vcpu_enable_native_msr(_ vcpu: hv_vcpuid_t, _ msr: UInt32, _ enable: Bool) -> hv_return_t
```

## Parameters

`vcpu`

The instance of the vCPU.

`msr`

The ID of the MSR.

`enable`

A Boolean value that if `true` indicates that the guest uses the specified MSR natively.

## Return Value

[`HV_SUCCESS`](/documentation/Hypervisor/HV_SUCCESS) if the operation was successful, otherwise an error code specified in [`hv_return_t`](/documentation/Hypervisor/hv_return_t).

## Discussion

This function must be called by the owning thread..

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)