On 06/12/16 11:14, Jan Beulich wrote: > If any of those hooks returns X86EMUL_EXCEPTION, some register state > should still get updated if some iterations have been performed (but > the rIP update will get suppressed if not all of them did get handled). > This updating is done by register_address_increment() and > __put_rep_prefix() (which hence must no longer be bypassed). As a > result put_rep_prefix() can then skip most of the writeback, but needs > to ensure proper completion of the executed instruction. > > While on the HVM side the VA -> LA -> PA translation process ensures > that an exception would be raised on the first iteration only, doing so > would unduly complicate the PV side code about to be added. > > Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
