[PATCH] KVM: PPC: Book3S HV: Define H_PAGE_IN_NONSHARED for H_SVM_PAGE_IN hcall

[Ram Pai]

On Fri, Jul 31, 2020 at 10:03:34AM +0530, Bharata B Rao wrote:
> 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.

Yes. Realized it after sending the patch. Will fix it.

> 
> > 
> > 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?

I know the Hypervisor code currently has no use for that define.
It assumes  H_PAGE_IN_NONSHARED to be !H_PAGE_IN_SHARED.

But H_PAGE_IN_NONSHARED is defined in the Ultravisor API, and hence has
to be captured in the header, to stay consistent.

RP