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Re: [Xen-devel] pciback

To: ron minnich <rminnich@xxxxxxxxx>
Subject: Re: [Xen-devel] pciback
From: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Date: 2006年12月15日 07:15:33 +0000
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On Thu, 2006年12月14日 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 .&checktime(0000,00,1,':')d.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 = ".&checktime(0000,00,1,':')d.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 = ".&checktime(0000,00,1,':')d.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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