Re: [Qemu-devel] [PATCH V15 4/5] i386: add a Virtual Machine Generation ID device

[Gal Hammer]

On 28/05/2015 13:25, Paolo Bonzini wrote:
> On 27/04/2015 13:19, Gal Hammer wrote:
> > +static void vmgenid_init(Object *obj)
> > +{
> > +    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
> > +    VmGenIdState *s = VMGENID(obj);
> > +
> > +    memory_region_init_io(&s->iomem, obj, &vmgenid_ram_ops, s, "vgid", 16);
>
> This is a small problem.  The spec says the memory of the VMGENID should
> not be uncacheable, but MMIO _should_ be uncacheable.
>
> This is running on a VM so we maybe not care, but it's worth pointing it
> out.

And the way I can fix it would be...? Is there another memory region I 
can use?

Thanks,

    Gal.

> Paolo
>
> > +    sysbus_init_mmio(sbd, &s->iomem);
> > +
> > +    object_property_add_str(obj, PROPERTY_UUID, NULL, vmgenid_set_uuid, NULL);
> > +}
> > +