On Wed, Sep 08, 2021 at 05:58:31PM -0500, Tom Lendacky wrote:

This patch series provides a generic helper function, cc_platform_has(),
to replace the sme_active(), sev_active(), sev_es_active() and
mem_encrypt_active() functions.

It is expected that as new confidential computing technologies are
added to the kernel, they can all be covered by a single function call
instead of a collection of specific function calls all called from the
same locations.

The powerpc and s390 patches have been compile tested only. Can the
folks copied on this series verify that nothing breaks for them. Also,
a new file, arch/powerpc/platforms/pseries/cc_platform.c, has been
created for powerpc to hold the out of line function.

...

Tom Lendacky (8):
  x86/ioremap: Selectively build arch override encryption functions
  mm: Introduce a function to check for confidential computing features
  x86/sev: Add an x86 version of cc_platform_has()
  powerpc/pseries/svm: Add a powerpc version of cc_platform_has()
  x86/sme: Replace occurrences of sme_active() with cc_platform_has()
  x86/sev: Replace occurrences of sev_active() with cc_platform_has()
  x86/sev: Replace occurrences of sev_es_active() with cc_platform_has()
  treewide: Replace the use of mem_encrypt_active() with
    cc_platform_has()

Ok, modulo the minor things the plan is to take this through tip after
-rc2 releases in order to pick up the powerpc build fix and have a clean
base (-rc2) to base stuff on, at the same time.

Pls holler if something's still amiss.

Sathya,

if you want to prepare the Intel variant intel_cc_platform_has() ontop
of those and send it to me, that would be good because then I can
integrate it all in one branch which can be used to base future work
ontop.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette