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

Kuppuswamy, Sathyanarayanan
2021-08-13T17:19:55Z

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<jroedel@suse.de>
> Co-developed-by: Andi Kleen<ak@linux.intel.com>
> Signed-off-by: Andi Kleen<ak@linux.intel.com>
> 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