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# hv_memory_flags_t

The permissions for guest physical memory regions.

```
typealias hv_memory_flags_t = UInt64
```

## Discussion

Set with the [`hv_vm_map(_:_:_:_:)`](/documentation/Hypervisor/hv_vm_map(_:_:_:_:)) and [`hv_vm_protect(_:_:_:)`](/documentation/Hypervisor/hv_vm_protect(_:_:_:)) functions.

## Topics

### Permissions

[`HV_MEMORY_READ`](/documentation/Hypervisor/HV_MEMORY_READ)

The value that represents the memory-read permission.

[`HV_MEMORY_WRITE`](/documentation/Hypervisor/HV_MEMORY_WRITE)

The value that represents the memory-write permission.

[`HV_MEMORY_EXEC`](/documentation/Hypervisor/HV_MEMORY_EXEC)

The value that represents the memory-execute permission.


---

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