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

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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@xxxxxxx>
Co-developed-by: Andi Kleen<ak@xxxxxxxxxxxxxxx>
Signed-off-by: Andi Kleen<ak@xxxxxxxxxxxxxxx>
Co-developed-by: Kuppuswamy Sathyanarayanan<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
Signed-off-by: Kuppuswamy Sathyanarayanan<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
Signed-off-by: Tom Lendacky<thomas.lendacky@xxxxxxx>
---
  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@xxxxxxxxxxxxxxx>

--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer



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