> From: Roger Pau Monne [mailto:roger....@citrix.com] > Sent: Wednesday, July 3, 2019 7:33 PM > > EPT differs from NPT and shadow when translating page orders to levels > in the physmap page tables. EPT page tables level for order 0 pages is > 0, while NPT and shadow instead use 1, ie: EPT page tables levels > starts at 0 while NPT and shadow starts at 1. > > Fix the p2m_entry_modify call in atomic_write_ept_entry to always add > one to the level, in order to match NPT and shadow usage. > > While there also add a check to ensure p2m_entry_modify is never > called with level == 0. That should allow to catch future errors > related to the level parameter. > > Fixes: c7a4c088ad1c ('x86/mm: split p2m ioreq server pages special handling > into helper') > Signed-off-by: Roger Pau Monné <roger....@citrix.com>
Reviewed-by: Kevin Tian <kevin.t...@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
