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# hv_vm_protect_space(_:_:_:_:)

Modifies the permissions of a region in a guest physical address space of the VM.

```
func hv_vm_protect_space(_ asid: hv_vm_space_t, _ gpa: hv_gpaddr_t, _ size: Int, _ flags: hv_memory_flags_t) -> hv_return_t
```

## Parameters

`asid`

The address space ID.

`gpa`

The page aligned address in the guest physical address space.

`size`

The size in bytes of the region to unmap.

`flags`

The new `READ`, `WRITE` and `EXECUTE` permissions of the region.

## 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).

---

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