Re: [Xen-devel] [PATCH v5 01/21] xen/x86: Annotate VM applicability in featureset

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 07.04.16 at 13:57, <andrew.cooper3@xxxxxxxxxx> wrote:
> Use attributes to specify whether a feature is applicable to be exposed to:
>  1) All guests
>  2) HVM guests
>  3) HVM HAP guests
> and, via absence of an attribute, to no guests.
> 
> There is no current need for other categories (e.g. PV-only features), and
> such categories should not be introduced if possible.  These categories 
> follow
> from the fact that, with increased hardware support, a guest gets more
> features to use.
> 
> These settings are derived from the existing code in {pv,hvm}_cpuid(), and
> xc_cpuid_x86.c.  One notable exception is EXTAPIC which was previously
> erroneously exposed to guests.  PV guests don't get to use the APIC and the
> HVM APIC emulation doesn't support extended space.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel