On Thu, Jul 30, 2020 at 04:21:01PM -0700, Ram Pai wrote:

H_SVM_PAGE_IN hcall takes a flag parameter. This parameter specifies the
way in which a page will be treated.  H_PAGE_IN_NONSHARED indicates
that the page will be shared with the Secure VM, and H_PAGE_IN_SHARED
indicates that the page will not be shared but its contents will
be copied.

Looks like you got the definitions of shared and non-shared interchanged.

However H_PAGE_IN_NONSHARED is not defined in the header file, though
it is defined and documented in the API captured in
Documentation/powerpc/ultravisor.rst

Define H_PAGE_IN_NONSHARED in the header file.

What is the use of defining this? Is this used directly in any place?
Or, are youp planning to introduce such a usage?

Regards,
Bharata.