Re: [Xen-devel] [Query] How does Xen X86 does pci enumeration

[Xenbegn developer <xen.begn.dev@xxxxxxxxx>]

On Wed, Jul 16, 2014 at 7:19 PM, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:

On Wed, Jul 16, 2014 at 05:25:07PM +0530, Xenbegn developer wrote:
> On 7/15/14, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> > On Tue, Jul 15, 2014 at 11:54:34AM +0530, Xenbegn developer wrote:
> >> Hi,
> >>
> >> Small beginner query. Where in Xen X86 code pci ep enumeration is done?
> >> I believe it this should be the flow of events
> >> a) Âfrom ACPI enumerate all the PCI controllers
> >> b) On each Controller start enumerating the pci devices.
> >
> > No. You can also query the PCI via the configuration registers.
> >
> > Look in the 'pci.c' files.
> >>
> >> I started from _start_xen in arch/x86/setup.c but couldnt find the top
> >> level function.
> >> Can anyone please provide pointer.
> >>
> One supplement question, does Xen do PCI devices enumeration or Dom0 does it ?

Both.

What is the use case for dom0 and xen both to do pci devices enumeration. What purpose it solves for xen ?
Â

>
>
> >> Thanks
> >
> >> _______________________________________________
> >> Xen-devel mailing list
> >> Xen-devel@xxxxxxxxxxxxx
> >> http://lists.xen.org/xen-devel
> >
> >

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