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

- From: Joerg Roedel \<joro@8bytes.org\>
- Date: 2021-08-02 10:35:00 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/08/211435
- Thread: https://ratatoskr.run/linuxppc-dev/2021/07/211118/t.md

```text
On Tue, Jul 27, 2021 at 05:26:04PM -0500, Tom Lendacky wrote:
> In prep for other protected virtualization technologies, introduce a
> generic helper function, prot_guest_has(), that can be used to check
> for specific protection attributes, like memory encryption. This is
> intended to eliminate having to add multiple technology-specific checks
> to the code (e.g. if (sev_active() || tdx_active())).
> 
> Co-developed-by: Andi Kleen <redacted>
> Signed-off-by: Andi Kleen <redacted>
> Co-developed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>

Reviewed-by: Joerg Roedel <redacted>
```