On 29.04.2020 15:06, Andrew Cooper wrote: > This is the start of some performance and security-hardening improvements, > based on the fact that 32bit PV guests are few and far between these days. > > Ring1 is full of architectural corner cases, such as counting as supervisor > from a paging point of view. This accounts for a substantial performance hit > on processors from the last 8 years (adjusting SMEP/SMAP on every privilege > transition), and the gap is only going to get bigger with new hardware > features. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> > Reviewed-by: Wei Liu <w...@xen.org> > Reviewed-by: Roger Pau Monné <roger....@citrix.com>
Acked-by: Jan Beulich <jbeul...@suse.com>
