Hello exports,
I have a question for bus assign of SR-IOV device.
I researched the SR-IOV specification.
I think that assign bus number of SR-IOV device is follow:
<reserved bus number for SR-IOV> = <LastVF's bus number> - <PF's bus number>
<assign bus number> = 1 + <reserved bus number for SR-IOV>
<reserved bus number for SR-IOV> is PciIoDevice->ReservedBusNum in
PciEnumeratorSupport.c in PciBusDxe.
But PciIoDevice->ReservedBusNum is set to value of one or more in
PciEnumeratorSupport.c in PciBusDxe.
So <assign bus number> is set to value of two or more in PciScanBus function of
PciLib.c in PciBusDxe.
== PciEnumeratorSupport.c:CreatePciIoDevice() ==================================
...
//
// Calculate ReservedBusNum for this PF
//
PciIoDevice->ReservedBusNum = (UINT16)(EFI_PCI_BUS_OF_RID (LastVF) - Bus
+ 1);
~~~
...
=================================================================================
Question 1) Plus 1 in Calculate ReservedBusNum is bug?
Question 2) If Question 1 answer is no, plese tell me that specification of
this code.
Regards,
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