Re: [Qemu-devel] [PATCH 27/35] pc: migrate piix4 & ich9 MemHotplugState

[Igor Mammedov <imammedo@redhat.com>]

On Fri, 04 Apr 2014 16:16:34 +0200
Paolo Bonzini <pbonzini@redhat.com> wrote:

> Il 04/04/2014 15:36, Igor Mammedov ha scritto:
> > Adds an optional vmstate field that allows to migrate current
> > state of acpi_memory_hotplug of ACPI PM device.
> >
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > ---
> >  hw/acpi/ich9.c                   |  8 ++++++++
> >  hw/acpi/memory_hotplug.c         | 27 +++++++++++++++++++++++++++
> >  hw/acpi/piix4.c                  |  8 ++++++++
> >  include/hw/acpi/memory_hotplug.h |  7 +++++++
> >  4 files changed, 50 insertions(+)
> >
> > diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
> > index 86c45ba..e566f7e 100644
> > --- a/hw/acpi/ich9.c
> > +++ b/hw/acpi/ich9.c
> > @@ -140,6 +140,12 @@ static int ich9_pm_post_load(void *opaque, int version_id)
> >       .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
> >   }
> >
> > +static bool vmstate_test_use_memhp(void *opaque, int version_id)
> > +{
> > +    ICH9LPCPMRegs *s = opaque;
> > +    return s->acpi_memory_hotplug.is_enabled;
> > +}
> > +
> >  const VMStateDescription vmstate_ich9_pm = {
> >      .name = "ich9_pm",
> >      .version_id = 1,
> > @@ -156,6 +162,8 @@ const VMStateDescription vmstate_ich9_pm = {
> >          VMSTATE_GPE_ARRAY(acpi_regs.gpe.en, ICH9LPCPMRegs),
> >          VMSTATE_UINT32(smi_en, ICH9LPCPMRegs),
> >          VMSTATE_UINT32(smi_sts, ICH9LPCPMRegs),
> > +        VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug,
> > +                               ICH9LPCPMRegs, vmstate_test_use_memhp),
> >          VMSTATE_END_OF_LIST()
> >      }
> >  };
> > diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
> > index a5c3ef4..7d33cd7 100644
> > --- a/hw/acpi/memory_hotplug.c
> > +++ b/hw/acpi/memory_hotplug.c
> > @@ -155,3 +155,30 @@ void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
> >      acpi_update_sci(ar, irq);
> >      return;
> >  }
> > +
> > +static const VMStateDescription vmstate_memhp_sts = {
> > +    .name = "memory hotplug device state",
> > +    .version_id = 1,
> > +    .minimum_version_id = 1,
> > +    .minimum_version_id_old = 1,
> > +    .fields      = (VMStateField[]) {
> > +        VMSTATE_BOOL(is_enabled, MemStatus),
> > +        VMSTATE_BOOL(is_inserting, MemStatus),
> > +        VMSTATE_UINT32(ost_event, MemStatus),
> > +        VMSTATE_UINT32(ost_status, MemStatus),
> > +        VMSTATE_END_OF_LIST()
> > +    }
> > +};
> > +
> > +const VMStateDescription vmstate_memory_hotplug = {
> > +    .name = "memory hotplug state",
> > +    .version_id = 1,
> > +    .minimum_version_id = 1,
> > +    .minimum_version_id_old = 1,
> > +    .fields      = (VMStateField[]) {
> > +        VMSTATE_UINT32(selector, MemHotplugState),
> > +        VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
> > +                                             vmstate_memhp_sts, MemStatus),
> > +        VMSTATE_END_OF_LIST()
> > +    }
> > +};
> > diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
> > index 056a7bc..3028eb6 100644
> > --- a/hw/acpi/piix4.c
> > +++ b/hw/acpi/piix4.c
> > @@ -250,6 +250,12 @@ static bool vmstate_test_no_use_acpi_pci_hotplug(void *opaque, int version_id)
> >      return !s->use_acpi_pci_hotplug;
> >  }
> >
> > +static bool vmstate_test_use_memhp(void *opaque, int version_id)
> > +{
> > +    PIIX4PMState *s = opaque;
> > +    return s->acpi_memory_hotplug.is_enabled;
> > +}
> > +
> >  /* qemu-kvm 1.2 uses version 3 but advertised as 2
> >   * To support incoming qemu-kvm 1.2 migration, change version_id
> >   * and minimum_version_id to 2 below (which breaks migration from
> > @@ -280,6 +286,8 @@ static const VMStateDescription vmstate_acpi = {
> >              struct AcpiPciHpPciStatus),
> >          VMSTATE_PCI_HOTPLUG(acpi_pci_hotplug, PIIX4PMState,
> >                              vmstate_test_use_acpi_pci_hotplug),
> > +        VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug,
> > +                               PIIX4PMState, vmstate_test_use_memhp),
> >          VMSTATE_END_OF_LIST()
> >      }
> >  };
> > diff --git a/include/hw/acpi/memory_hotplug.h b/include/hw/acpi/memory_hotplug.h
> > index 912c53f..7251dd0 100644
> > --- a/include/hw/acpi/memory_hotplug.h
> > +++ b/include/hw/acpi/memory_hotplug.h
> > @@ -3,6 +3,7 @@
> >
> >  #include "hw/qdev-core.h"
> >  #include "hw/acpi/acpi.h"
> > +#include "migration/vmstate.h"
> >
> >  #define ACPI_MEMORY_HOTPLUG_STATUS 8
> >
> > @@ -27,4 +28,10 @@ void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
> >
> >  void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
> >                           DeviceState *dev, Error **errp);
> > +
> > +extern const VMStateDescription vmstate_memory_hotplug;
> > +#define VMSTATE_MEMORY_HOTPLUG(memhp, state, test_memhp_fn) \
> > +    VMSTATE_STRUCT_TEST(memhp, state, test_memhp_fn, 1, \
> > +                        vmstate_memory_hotplug, MemHotplugState)
> > +
> >  #endif
> >
> 
> It's better to use a subsection for this.  (In fact I think I had asked 
> for the same for PCI hotplug as well, but my suggestion was ignored). :(
I'm sorry about, I just followed recent code for PCI hotplug here thinking
it's a more preferred way. I'll switch it to subsection on the next respin.

> 
> Paolo
> 


-- 
Regards,
  Igor