On 19.04.2021 16:45, Andrew Cooper wrote: > Factor out a compat boolean to remove the lfence overhead from multiple > is_pv_32bit_domain() calls. > > For a compat guest, the upper 32 bits of rdx are zero, so there is no need to > have any conditional logic at all when mapping the start info page.
Iirc the contents of the upper halves hold unspecified contents after a switch from compat to 64-bit mode. Therefore only with this part of the change dropped ... > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> Reviewed-by: Jan Beulich <jbeul...@suse.com> Jan
