>>> On 14.08.17 at 12:21, <jgr...@suse.com> wrote: > Current pv guests will only see physical addresses up to 46 bits wide. > In order to be able to run on a host supporting 5 level paging and to > make use of any possible memory page there, physical addresses with up > to 52 bits have to be supported.
Is this a Xen shortcoming or a Linux one (I assume the latter)? > --- a/xen/include/public/elfnote.h > +++ b/xen/include/public/elfnote.h > @@ -212,9 +212,18 @@ > #define XEN_ELFNOTE_PHYS32_ENTRY 18 > > /* > + * Maximum physical address size the kernel can handle. > + * > + * All memory of the PV guest must be allocated below this boundary, > + * as the guest kernel can't handle page table entries with MFNs referring > + * to memory above this value. > + */ > +#define XEN_ELFNOTE_MAXPHYS_SIZE 19 Without use in the hypervisor or tools I don't see what good introducing this note will do. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
