Re: [Xen-devel] [edk2] [PATCH] MdeModulePkg: mark completion of PCI enumeration in PciEnumeratorLight

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Feb 12, 2015 at 01:23:26AM +0000, Ni, Ruiyu wrote:
> Wei,

> No you cannot install gEfiPciEnumerationCompleteProtocolGuid in
> PciEnumeratorLight().
>
> For a real platform, PCI BUS is fully enumerated in PciEnumerator()
> and later if reconnect happens, it's light enumerated in
> PciEnumeratorLight(). The protocol should only be installed once in
> PeiEnumerator(). Your fix will cause this protocol installed every
> time a reconnect happens.
>

Makes sense.

> The protocol 's meaning is that the PCI BUS is fully enumerated. If
> the PCI BUS is fully enumerated before starting PciBus driver, light
> PCI enumeration is used.
>
> For your OVMF/QEMU case, an alternative fix is to install this
> protocol in a platform driver when it detects that the PCI BUS is
> fully enumerated.
> 

Cool, thanks for the pointer.

Then I shall fix it inside OVMF.

Wei.

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