vfio determines if rombar is explicitly enabled by inspecting QDict.
Inspecting QDict is not nice because QDict is untyped and depends on the
details on the external interface. Add an infrastructure to determine if
rombar is explicitly enabled to hw/pci.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 include/hw/pci/pci_device.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/hw/pci/pci_device.h b/include/hw/pci/pci_device.h
index d3dd0f64b273..7564e9536dbd 100644
--- a/include/hw/pci/pci_device.h
+++ b/include/hw/pci/pci_device.h
@@ -205,6 +205,11 @@ static inline uint16_t pci_get_bdf(PCIDevice *dev)
     return PCI_BUILD_BDF(pci_bus_num(pci_get_bus(dev)), dev->devfn);
 }
 
+static inline bool pci_rom_bar_explicitly_enabled(PCIDevice *dev)
+{
+    return dev->rom_bar > 0;
+}
+
 uint16_t pci_requester_id(PCIDevice *dev);
 
 /* DMA access functions */

-- 
2.43.0

On Mon, Feb 12, 2024 at 07:20:30PM +0900, Akihiko Odaki wrote:
> vfio determines if rombar is explicitly enabled by inspecting QDict.
> Inspecting QDict is not nice because QDict is untyped and depends on the
> details on the external interface. Add an infrastructure to determine if
> rombar is explicitly enabled to hw/pci.
> 
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> ---
>  include/hw/pci/pci_device.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/include/hw/pci/pci_device.h b/include/hw/pci/pci_device.h
> index d3dd0f64b273..7564e9536dbd 100644
> --- a/include/hw/pci/pci_device.h
> +++ b/include/hw/pci/pci_device.h
> @@ -205,6 +205,11 @@ static inline uint16_t pci_get_bdf(PCIDevice *dev)
>      return PCI_BUILD_BDF(pci_bus_num(pci_get_bus(dev)), dev->devfn);
>  }
>  
> +static inline bool pci_rom_bar_explicitly_enabled(PCIDevice *dev)
> +{
> +    return dev->rom_bar > 0;
> +}
> +

I don't get it. rom_bar is uint32_t if it's set to "-1" is is still >0.

How was this patchset tested?


>  uint16_t pci_requester_id(PCIDevice *dev);
>  
>  /* DMA access functions */
> 
> -- 
> 2.43.0

On 2024/02/13 19:52, Michael S. Tsirkin wrote:
> On Mon, Feb 12, 2024 at 07:20:30PM +0900, Akihiko Odaki wrote:
>> vfio determines if rombar is explicitly enabled by inspecting QDict.
>> Inspecting QDict is not nice because QDict is untyped and depends on the
>> details on the external interface. Add an infrastructure to determine if
>> rombar is explicitly enabled to hw/pci.
>>
>> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
>> ---
>>   include/hw/pci/pci_device.h | 5 +++++
>>   1 file changed, 5 insertions(+)
>>
>> diff --git a/include/hw/pci/pci_device.h b/include/hw/pci/pci_device.h
>> index d3dd0f64b273..7564e9536dbd 100644
>> --- a/include/hw/pci/pci_device.h
>> +++ b/include/hw/pci/pci_device.h
>> @@ -205,6 +205,11 @@ static inline uint16_t pci_get_bdf(PCIDevice *dev)
>>       return PCI_BUILD_BDF(pci_bus_num(pci_get_bus(dev)), dev->devfn);
>>   }
>>   
>> +static inline bool pci_rom_bar_explicitly_enabled(PCIDevice *dev)
>> +{
>> +    return dev->rom_bar > 0;
>> +}
>> +
> 
> I don't get it. rom_bar is uint32_t if it's set to "-1" is is still >0.
> 
> How was this patchset tested?

I was careless forgot to test v3. I'll revert this line into what v2 had.