Clark, Christopher W
2005-Jul-28 20:31 UTC
[Xen-devel] [PATCH] Frame type pinning: add support for PGT_none
Xen provides a facility to guest kernels to ''pin'' frames to a specific type, where the type indicates the frame contents, distinguishing page tables from writable pages. The ability to pin a page as a readonly frame -- and hence prevent any writable pagetable mappings being made to it -- has been omitted, and this is remedied by this patch. Also included is an example of use: a linux kernel parameter is added to enable a guest to pin the frames containing the system call table and zero page as readonly, to prevent subsequent writes to these frames. Signed-off-by: Christopher Clark _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel