Re: [Xen-devel] pciback

[Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>]

On Thu, 2006-12-14 at 15:55 -0700, ron minnich wrote:
> Ian, I assumed that if I bound a device to pciback (it can bind now,
> see earlier mail) then I would see it in xenstore. Is this not the
> case?

I don't think you will see anything till you configure and start a domU
which uses that device.

> If I set up a *pci in domU, but don't have pcifront working in domU
> yet, can I still see it in xenstore on domU?

This is the point at which I would expect stuff show up in xenstore.

For example when I started a domU with PCI device 0000:00:1d.00 but no
pcifront driver I see these store entries:

        # xenstore-ls /local/domain/0/backend/pci
        13 = ""
         0 = ""
          domain = "debian-2"
          frontend = "/local/domain/13/device/pci/0"
          uuid = "e115728d-a997-4433-e586-6d3e9103c8b4"
          dev-0 = "0000:00:1d.00"
          state = "3"
          online = "1"
          frontend-id = "13"
          num_devs = "1"
          root-0 = "0000:00"
          root_num = "1"
        # xenstore-ls /local/domain/13/device/pci
        0 = ""
         state = "1"
         backend-id = "0"
         backend = "/local/domain/0/backend/pci/13/0"

When I start the same domain with a pcifront driver I get:

        # xenstore-ls /local/domain/0/backend/pci
        14 = ""
         0 = ""
          domain = "debian-2"
          frontend = "/local/domain/14/device/pci/0"
          uuid = "b328cab0-a704-d59f-8133-c5f053f4b639"
          dev-0 = "0000:00:1d.00"
          state = "4"
          online = "1"
          frontend-id = "14"
          num_devs = "1"
          root-0 = "0000:00"
          root_num = "1"
        # xenstore-ls /local/domain/14/device/pci
        0 = ""
         state = "4"
         backend-id = "0"
         backend = "/local/domain/0/backend/pci/14/0"
         pci-op-ref = "8"
         event-channel = "27"
         magic = "7"

Ian.


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