# Re: \[PATCH 01/11\] mm: Introduce a function to check for virtualization protection features

- From: Tom Lendacky \<thomas.lendacky@amd.com\>
- Date: 2021-08-11 15:40:01 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/08/212126
- Thread: https://ratatoskr.run/linuxppc-dev/2021/07/211118/t.md

```text
On 8/11/21 9:53 AM, Kuppuswamy, Sathyanarayanan wrote:
> On 7/27/21 3:26 PM, Tom Lendacky wrote:
>> diff --git a/include/linux/protected_guest.h
>> b/include/linux/protected_guest.h
>> new file mode 100644
>> index 000000000000..f8ed7b72967b
>> --- /dev/null
>> +++ b/include/linux/protected_guest.h
>> @@ -0,0 +1,32 @@
>> +/* SPDX-License-Identifier: GPL-2.0-only */
>> +/*
>> + * Protected Guest (and Host) Capability checks
>> + *
>> + * Copyright (C) 2021 Advanced Micro Devices, Inc.
>> + *
>> + * Author: Tom Lendacky[ref]
>> + */
>> +
>> +#ifndef _PROTECTED_GUEST_H
>> +#define _PROTECTED_GUEST_H
>> +
>> +#ifndef __ASSEMBLY__
> 
> Can you include headers for bool type and false definition?

Can do.

Thanks,
Tom

> 
> --- a/include/linux/protected_guest.h
> +++ b/include/linux/protected_guest.h
> @@ -12,6 +12,9 @@
> 
>  #ifndef __ASSEMBLY__
> 
> +#include <linux/types.h>
> +#include <linux/stddef.h>
> 
> Otherwise, I see following errors in multi-config auto testing.
> 
> include/linux/protected_guest.h:40:15: error: unknown type name 'bool'
> include/linux/protected_guest.h:40:63: error: 'false' undeclared (first
> use in this functi
> 
```