On 09/07/15 21:42, Julien Grall wrote: > The Xen hypercall interface is always using 4K page granularity on ARM > and x86 architecture. > > With the incoming support of 64K page granularity for ARM64 guest, it > won't be possible to re-use the Linux page definition in Xen drivers. > > Introduce Xen page definition helpers based on the Linux page > definition. They have exactly the same name but prefixed with > XEN_/xen_ prefix. > > Also modify page_to_pfn to use new Xen page definition. > > Signed-off-by: Julien Grall <[email protected]> > Cc: Konrad Rzeszutek Wilk <[email protected]> > Cc: Boris Ostrovsky <[email protected]> > Cc: David Vrabel <[email protected]> > --- > I'm wondering if we should drop page_to_pfn has the macro will likely > misuse when Linux is using 64KB page granularity.
I think we want xen_gfn_to_page() and xen_page_to_gfn() and Xen front/back drivers never deal with PFNs only GFNs. David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
