>>> On 26.02.18 at 15:08, <jgross@xxxxxxxx> wrote: > Older Xen versions (4.5 and before) might have problems migrating pv > guests with MSR_IA32_SPEC_CTRL having a non-zero value. So before > suspending zero that MSR and restore it after being resumed. > > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>