# Re: \[PATCH v2 02/12\] mm: Introduce a function to check for virtualization protection features

- From: Tom Lendacky \<thomas.lendacky@amd.com\>
- Date: 2021-08-14 18:49:32 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/08/212405
- Thread: https://ratatoskr.run/linuxppc-dev/2021/08/212359/t.md

```text
On 8/14/21 1:32 PM, Borislav Petkov wrote:
> On Fri, Aug 13, 2021 at 11:59:21AM -0500, Tom Lendacky wrote:
>> diff --git a/include/linux/protected_guest.h b/include/linux/protected_guest.h
>> new file mode 100644
>> index 000000000000..43d4dde94793
>> --- /dev/null
>> +++ b/include/linux/protected_guest.h
>> @@ -0,0 +1,35 @@
>> +/* 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__
> 	   ^^^^^^^^^^^^^
>
> Do you really need that guard? It builds fine without it too. Or
> something coming later does need it...?

No, I probably did it out of habit. I can remove it in the next version.

Thanks,
Tom

>
```