Re: [Qemu-devel] [PATCH v6 03/37] ppc/xive: introduce the XiveNotifier interface

["Cédric Le Goater" <clg@kaod.org>]

On 12/6/18 4:25 AM, David Gibson wrote:
> On Thu, Dec 06, 2018 at 12:22:17AM +0100, Cédric Le Goater wrote:
>> The XiveNotifier offers a simple interface, between the XiveSource
>> object and the main interrupt controller of the machine. It will
>> forward event notifications to the XIVE Interrupt Virtualization
>> Routing Engine (IVRE).
>>
>> Signed-off-by: Cédric Le Goater <clg@kaod.org>
>> ---
>>  include/hw/ppc/xive.h | 23 +++++++++++++++++++++++
>>  hw/intc/xive.c        | 25 +++++++++++++++++++++++++
>>  2 files changed, 48 insertions(+)
>>
>> diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
>> index 7cebc32eba4c..6770cffec67d 100644
>> --- a/include/hw/ppc/xive.h
>> +++ b/include/hw/ppc/xive.h
>> @@ -142,6 +142,27 @@
>>  
>>  #include "hw/qdev-core.h"
>>  
>> +/*
>> + * XIVE Fabric (Interface between Source and Router)
>> + */
>> +
>> +typedef struct XiveNotifier {
>> +    Object parent;
>> +} XiveNotifier;
>> +
>> +#define TYPE_XIVE_NOTIFIER "xive-fabric"
> 
> I'm applying this, but changing the string here from "xive-fabric" to
> "xive-notifier".

Ah yes. My sed command missed that.

Thanks,

C.

> 
> 
>> +#define XIVE_NOTIFIER(obj)                                     \
>> +    OBJECT_CHECK(XiveNotifier, (obj), TYPE_XIVE_NOTIFIER)
>> +#define XIVE_NOTIFIER_CLASS(klass)                                     \
>> +    OBJECT_CLASS_CHECK(XiveNotifierClass, (klass), TYPE_XIVE_NOTIFIER)
>> +#define XIVE_NOTIFIER_GET_CLASS(obj)                                   \
>> +    OBJECT_GET_CLASS(XiveNotifierClass, (obj), TYPE_XIVE_NOTIFIER)
>> +
>> +typedef struct XiveNotifierClass {
>> +    InterfaceClass parent;
>> +    void (*notify)(XiveNotifier *xn, uint32_t lisn);
>> +} XiveNotifierClass;
>> +
>>  /*
>>   * XIVE Interrupt Source
>>   */
>> @@ -171,6 +192,8 @@ typedef struct XiveSource {
>>      uint64_t        esb_flags;
>>      uint32_t        esb_shift;
>>      MemoryRegion    esb_mmio;
>> +
>> +    XiveNotifier    *xive;
>>  } XiveSource;
>>  
>>  /*
>> diff --git a/hw/intc/xive.c b/hw/intc/xive.c
>> index 11c7aac962de..79238eb57fae 100644
>> --- a/hw/intc/xive.c
>> +++ b/hw/intc/xive.c
>> @@ -155,7 +155,11 @@ static bool xive_source_esb_eoi(XiveSource *xsrc, uint32_t srcno)
>>   */
>>  static void xive_source_notify(XiveSource *xsrc, int srcno)
>>  {
>> +    XiveNotifierClass *xnc = XIVE_NOTIFIER_GET_CLASS(xsrc->xive);
>>  
>> +    if (xnc->notify) {
>> +        xnc->notify(xsrc->xive, srcno);
>> +    }
>>  }
>>  
>>  /*
>> @@ -362,6 +366,17 @@ static void xive_source_reset(void *dev)
>>  static void xive_source_realize(DeviceState *dev, Error **errp)
>>  {
>>      XiveSource *xsrc = XIVE_SOURCE(dev);
>> +    Object *obj;
>> +    Error *local_err = NULL;
>> +
>> +    obj = object_property_get_link(OBJECT(dev), "xive", &local_err);
>> +    if (!obj) {
>> +        error_propagate(errp, local_err);
>> +        error_prepend(errp, "required link 'xive' not found: ");
>> +        return;
>> +    }
>> +
>> +    xsrc->xive = XIVE_NOTIFIER(obj);
>>  
>>      if (!xsrc->nr_irqs) {
>>          error_setg(errp, "Number of interrupt needs to be greater than 0");
>> @@ -428,9 +443,19 @@ static const TypeInfo xive_source_info = {
>>      .class_init    = xive_source_class_init,
>>  };
>>  
>> +/*
>> + * XIVE Fabric
>> + */
>> +static const TypeInfo xive_fabric_info = {
>> +    .name = TYPE_XIVE_NOTIFIER,
>> +    .parent = TYPE_INTERFACE,
>> +    .class_size = sizeof(XiveNotifierClass),
>> +};
>> +
>>  static void xive_register_types(void)
>>  {
>>      type_register_static(&xive_source_info);
>> +    type_register_static(&xive_fabric_info);
>>  }
>>  
>>  type_init(xive_register_types)
>