Re: [PATCH] x86/xen: zero MSR_IA32_SPEC_CTRL before suspend
From: Jan Beulich
Date: Mon Feb 26 2018 - 11:17:26 EST
>>> 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>