Re: [Xen-devel] Regression in PCI pass-through from qemu-xen changeset "passthrough: Fix older kernel assigned device resume failure problem"

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Simon Horman writes ("Re: [Xen-devel] Regression in PCI pass-through from 
qemu-xen changeset "passthrough: Fix older kernel assigned device resume      
failure problem""):
On Sat, May 02, 2009 at 12:10:15PM +1000, Simon Horman wrote:
> Changeset "passthrough: Fix older kernel assigned device resume failure
> problem" (dbb8aafa702b8b4f5568e08641d98471fd04e0f8) in
> qemu-xen-unstable.git appears to cause a regression. This changeset was
> applied between the xen-3.4.0-rc2 and xen-3.4.0-rc3 tags of
> qemu-xen-unstable.git.
...
> The problem that I am seeing is that with this changeset applied
> I am not able to correctly initialise Intel network cards. Though
> I assume the problem is not specific to this hardware.

Thanks ...

Cui, Dexuan writes ("[PATCH][ioemu] fix PCI bar mapping"):
> dbb8aafa702b8b4f5568e08641d98471fd04e0f8 has a bug:
> The virtual CMD value we get from reg_entry->data is not the proper value 
> because reg_entry->data only holds the emulated bits and the 
> PCI_COMMAND_IO/PCI_COMMAND_MEMORY bits are not in it.
> Instead, we can use pt_pci_read_config(&ptdev->dev, PCI_COMMAND, 2) to get 
> the proper value. 

... Cui, do you think this is likely to fix Simon's problem ?

I'm about to apply it, in any case, but I was wondering if we have
another problem too.

Thanks,
Ian.

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