On 10/05/17 10:02, Jan Beulich wrote: >>>> On 10.05.17 at 06:08, <jgr...@suse.com> wrote: >> When booted as pv-guest the p2m list presented by the Xen is already >> mapped to virtual addresses. In dom0 case the hypervisor might make use >> of 2M- or 1G-pages for this mapping. Unfortunately while being properly >> aligned in virtual and machine address space, those pages might not be >> aligned properly in guest physical address space. >> >> So when trying to obtain the guest physical address of such a page >> pud_pfn() and pmd_pfn() must be avoided as those will mask away guest >> physical address bits not being zero in this special case. >> >> Signed-off-by: Juergen Gross <jgr...@suse.com> > > Reviewed-by: Jan Beulich <jbeul...@suse.com> > > Perhaps worth Cc-ing stable@ ?
Any backport needs to be done manually, as mmu_pv.c has been introduced in 4.12 only. As soon as the patch is upstream I'm planning to do that (trivial) backport and send it to stable. Juergen
