Re: [Qemu-devel] [PATCH 3/5] acpi: implement ospm_status() method for PIIX4/ICH9_LPC devices

[Igor Mammedov <imammedo@redhat.com>]

On Mon, 16 Jun 2014 10:14:16 -0600
Eric Blake <eblake@redhat.com> wrote:

> On 06/05/2014 08:36 AM, Igor Mammedov wrote:
> > ... using TYPE_ACPI_DEVICE_IF interface.
> > Which provides status reporting of ACPI declared memory devices
> > 
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > ---
> > v2:
> >  - set slot-type to DIMM
> >  - take into account that 'device' field could be optional
> > ---
> >  hw/acpi/ich9.c                   |    7 +++++++
> >  hw/acpi/memory_hotplug.c         |   31 +++++++++++++++++++++++++++++++
> >  hw/acpi/piix4.c                  |   11 +++++++++++
> >  hw/isa/lpc_ich9.c                |    3 +++
> >  include/hw/acpi/ich9.h           |    3 +++
> >  include/hw/acpi/memory_hotplug.h |    1 +
> >  6 files changed, 56 insertions(+), 0 deletions(-)
> > 
> 
> > +void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list);
> 
> Triple indirection looks unusual, but that doesn't make it wrong :)
I plan to move ACPI code inside of interface handlers and drop piix4/ich9 stubs
in favor of using QOM casting directly. So it would be -1 layer of indirection and
not only for ospm_status().

In addition interface allows to avoid adding global function + stub where
functionality is not implemented.

> 
> Reviewed-by: Eric Blake <eblake@redhat.com>
>