On Wed, Feb 21, 2018 at 02:02:51PM +0000, Julien Grall wrote: > The function populate_pt_range is used to populate in advance the > page-table but it will not do the actual mapping. So passing the MFN in > parameter is pointless. Note that the only caller pass 0... > > At the same time replace 0 by INVALID_MFN to make clear the MFN is > invalid. >
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The mfn parameter is the first mfn of a consecutive nr MFNs passed to map_pages_to_xen. Putting INVALID_MFN isn't helping -- the value written to page table(s) will wrap around to 0. And I think starting from 0 to avoid overflow is probably a better behaviour. If you really want to make sure all entries are filled with INVALID_MFN you should call map_pages_to_xen for nr times with each page. Wei. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
