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