On 18.07.2022 22:50, Andrew Cooper wrote: > The RSB stuffing loop and retpoline thunks date from the very beginning, when > halting speculation was a brand new field. > > These days, we've largely settled on int3 for halting speculation in > non-architectural paths. It's a single byte, and is fully serialising - a > requirement for delivering #BP if it were to execute. > > Update the thunks. Mostly for consistency across the codebase, but it does > shrink every entrypath in Xen by 6 bytes which is a marginal win. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
Reviewed-by: Jan Beulich <jbeul...@suse.com>
