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

- From: Kuppuswamy, Sathyanarayanan \<sathyanarayanan.kuppuswamy@linux.intel.com\>
- Date: 2021-08-13 17:19:54 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/08/212373
- Thread: https://ratatoskr.run/linuxppc-dev/2021/08/212359/t.md

```text


On 8/13/21 9:59 AM, 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())).
>
> Reviewed-by: Joerg Roedel<redacted>
> 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>
> ---
>   arch/Kconfig                    |  3 +++
>   include/linux/protected_guest.h | 35 +++++++++++++++++++++++++++++++++
>   2 files changed, 38 insertions(+)
>   create mode 100644 include/linux/protected_guest.h

Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer
```