On 09/05/17 15:23, Jan Beulich wrote: > Since PV kernels can't use large pages anywa, when the init-P2M support
anyway ~Andrew > was added it was decided to keep the implementation simple and not > align large pages in PFN space. Document this. > > Signed-off-by: Jan Beulich <jbeul...@suse.com> > > --- a/xen/include/public/elfnote.h > +++ b/xen/include/public/elfnote.h > @@ -173,7 +173,9 @@ > * The (non-default) location the initial phys-to-machine map should be > * placed at by the hypervisor (Dom0) or the tools (DomU). > * The kernel must be prepared for this mapping to be established using > - * large pages, despite such otherwise not being available to guests. > + * large pages, despite such otherwise not being available to guests. Note > + * that these large pages may be misaligned in PFN space (they'll obviously > + * be aligned in MFN and virtual address spaces). > * The kernel must also be able to handle the page table pages used for > * this mapping not being accessible through the initial mapping. > * (Only x86-64 supports this at present.) > > > _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
