Re: [Qemu-devel] [PATCH v7 05/14] apic: save apic_delivered flag

["Pavel Dovgalyuk" <dovgaluk@ispras.ru>]

> From: Paolo Bonzini [mailto:paolo.bonzini@gmail.com] On Behalf Of Paolo Bonzini
> On 24/01/2017 08:17, Pavel Dovgalyuk wrote:
> > This patch implements saving/restoring of static apic_delivered variable.
> >
> > Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
> > ---
> >  hw/intc/apic_common.c           |   32 ++++++++++++++++++++++++++++++++
> >  include/hw/i386/apic_internal.h |    2 ++
> >  2 files changed, 34 insertions(+)
> >
> > diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
> > index d78c885..ac6cc67 100644
> > --- a/hw/intc/apic_common.c
> > +++ b/hw/intc/apic_common.c
> > @@ -384,6 +384,24 @@ static bool apic_common_sipi_needed(void *opaque)
> >      return s->wait_for_sipi != 0;
> >  }
> >
> > +static bool apic_irq_delivered_needed(void *opaque)
> > +{
> > +    return true;
> 
> Is it needed for CPUs except the first (or the last?)?
> 

As this is global variable, it is needed only for one CPU.
Do you mean that APIC state is saved for every CPU? 

> > +}
> > +
> > +static void apic_irq_delivered_pre_save(void *opaque)
> > +{
> > +    APICCommonState *s = APIC_COMMON(opaque);
> > +    s->apic_irq_delivered = apic_irq_delivered;
> > +}
> > +
> > +static int apic_irq_delivered_post_load(void *opaque, int version_id)
> > +{
> > +    APICCommonState *s = APIC_COMMON(opaque);
> > +    apic_irq_delivered = s->apic_irq_delivered;
> > +    return 0;
> > +}
> > +
> >  static const VMStateDescription vmstate_apic_common_sipi = {
> >      .name = "apic_sipi",
> >      .version_id = 1,
> > @@ -396,6 +414,19 @@ static const VMStateDescription vmstate_apic_common_sipi = {
> >      }
> >  };
> >
> > +static const VMStateDescription vmstate_apic_irq_delivered = {
> > +    .name = "apic_irq_delivered",
> > +    .version_id = 1,
> > +    .minimum_version_id = 1,
> > +    .needed = apic_irq_delivered_needed,
> > +    .pre_save = apic_irq_delivered_pre_save,
> > +    .post_load = apic_irq_delivered_post_load,
> > +    .fields = (VMStateField[]) {
> > +        VMSTATE_INT32(apic_irq_delivered, APICCommonState),
> > +        VMSTATE_END_OF_LIST()
> > +    }
> > +};
> > +
> >  static const VMStateDescription vmstate_apic_common = {
> >      .name = "apic",
> >      .version_id = 3,
> > @@ -430,6 +461,7 @@ static const VMStateDescription vmstate_apic_common = {
> >      },
> >      .subsections = (const VMStateDescription*[]) {
> >          &vmstate_apic_common_sipi,
> > +        &vmstate_apic_irq_delivered,
> >          NULL
> >      }
> >  };
> > diff --git a/include/hw/i386/apic_internal.h b/include/hw/i386/apic_internal.h
> > index 1209eb4..20ad28c 100644
> > --- a/include/hw/i386/apic_internal.h
> > +++ b/include/hw/i386/apic_internal.h
> > @@ -189,6 +189,8 @@ struct APICCommonState {
> >      DeviceState *vapic;
> >      hwaddr vapic_paddr; /* note: persistence via kvmvapic */
> >      bool legacy_instance_id;
> > +
> > +    int apic_irq_delivered; /* for saving static variable */
> >  };
> >
> >  typedef struct VAPICState {
> >
> >
> >

Pavel Dovgalyuk