Re: [Qemu-devel] [PATCH v3 22/32] nvdimm: init the address region used by NVDIMM ACPI

[Xiao Guangrong]

On 10/19/2015 06:25 PM, Michael S. Tsirkin wrote:
> On Mon, Oct 19, 2015 at 11:18:36AM +0200, Igor Mammedov wrote:
> > On Mon, 19 Oct 2015 09:56:12 +0300
> > "Michael S. Tsirkin" <address@hidden> wrote:
> >
> > > On Sun, Oct 11, 2015 at 11:52:54AM +0800, Xiao Guangrong wrote:
> > [...]
> > > > diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h
> > > > index f6bd2c4..aa95961 100644
> > > > --- a/include/hw/mem/nvdimm.h
> > > > +++ b/include/hw/mem/nvdimm.h
> > > > @@ -15,6 +15,10 @@
> > > >
> > > >   #include "hw/mem/dimm.h"
> > > >
> > > > +/* Memory region 0xFF00000 ~ 0xFFF00000 is reserved for NVDIMM
> > > > ACPI. */ +#define NVDIMM_ACPI_MEM_BASE   0xFF000000ULL
> > Michael,
> >
> > If it's ok to map control RAM region directly from QEMU at arbitrary
> > location
>
> It's a fair question. Where is it reserved? In which spec?

The region 0xFF00000 ~ 0xFFF00000 is just reserved for vDSM implementation,
it is not required by spec.