Hi, At 15:02 +0100 on 18 May (1495119734), Andrew Cooper wrote: > * When fabricating gl1e's from superpages, propagate the protection key as > well, so the protection key logic sees the real key as opposed to 0. > > * Experimentally, the protection key checks are performed ahead of the other > access rights. In particular, accesses which fail both protection key and > regular permission checks yield PFEC_prot_key in the resulting pagefault. > > * Protection keys apply to all user mode data accesses, including accesses > from supervisor code.
I think this would be clearer as "all data accesses to user-mode addresses". > PKRU WD applies to any data write, not just to > mapping which are writable. However, a supervisor access without CR0.WP > bypasses any protection from protection keys. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> Reviewed-by: Tim Deegan <t...@xen.org> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
