On Mon, Mar 05, 2018 at 11:36:58AM +0000, Ian Jackson wrote:
> Roger Pau Monne writes ("[PATCH] xl: remove apic option for PVH guests"):
> > XSA-256 forces the local APIC to always be enabled for PVH guests, so
> > ignore any apic option for PVH guests. Update the documentation
> > accordingly.
> ...
> > diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c
> > index f6842540ca..8b999825d2 100644
> > --- a/tools/xl/xl_parse.c
> > +++ b/tools/xl/xl_parse.c
> > @@ -1208,7 +1208,6 @@ void parse_config_data(const char *config_source,
> >      }
> >  
> >      xlu_cfg_get_defbool(config, "nestedhvm", &b_info->nested_hvm, 0);
> > -    xlu_cfg_get_defbool(config, "apic", &b_info->apic, 0);
> 
> Is this hunk not in a path also used by HVM ?

Yes, this hunk is moved to a HVM-specific section a little bit below:

@@ -1243,6 +1242,7 @@ void parse_config_data(const char *config_source,
         xlu_cfg_get_defbool(config, "nx", &b_info->u.hvm.nx, 0);
         xlu_cfg_get_defbool(config, "hpet", &b_info->u.hvm.hpet, 0);
         xlu_cfg_get_defbool(config, "vpt_align", &b_info->u.hvm.vpt_align, 0);
+        xlu_cfg_get_defbool(config, "apic", &b_info->apic, 0);

         switch (xlu_cfg_get_list(config, "viridian",
                                  &viridian, &num_viridian, 1))

So it's only set for HVM, which AFAICT should be fine.

Roger.

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