Re: [Xen-devel] [PATCH] xen: arm: document which hypercalls (and subops) are supported on ARM

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2013-07-23 at 17:59 +0100, Ian Campbell wrote:
> On Tue, 2013-07-23 at 16:34 +0100, Stefano Stabellini wrote:
> > On Tue, 23 Jul 2013, Ian Campbell wrote:
> > > On Tue, 2013-07-23 at 12:33 +0100, Stefano Stabellini wrote:
> > > 
> > > > You are missing all the common tmem ops.
> > > 
> > > tmem_ops are not hooked up in arm_hypercall_table, so they are currently
> > > not supported. We should add them here when we add the necessary
> > > support. ISTR stubbing out some functions which are used by tmem
> > > (steal_page and donate_page perhaps?) so it's not just a case or wiring
> > > it up either.
> > 
> > Right.. I was confused by the fact that we do compile tmem_op in Linux,
> > even though XEN_TMEM is actually not available on ARM or ARM64
> 
> I started from the other end and looked at what the hypervisor actually
> implements rather than what Linux calls. It's useful to validate from
> both angles though. For now I think we should stick with documenting
> what the hypervisor provides even if the kernel might try and
> optimistically call other stuff too.

So did we decide whether to run with this patch or not?

Ian.


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