Re: [Bug 88131] New: PCI device intel ixgbe and xhci with 64-bit bar address can NOT work on x86_32 PAE kernel.

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kernel config is uploaded in https://bugzilla.kernel.org/show_bug.cgi?id=88151

The domain is in USB.

cc Bjorn and ml.

Thanks,
Pengyu

On Thu, Nov 13, 2014 at 12:32 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
> On Wed, Nov 12, 2014 at 8:14 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote:
>> [+cc linux-pci, Yinghai]
>>
>> Thanks for the report!
>>
>> On Wed, Nov 12, 2014 at 8:57 PM,  <bugzilla-daemon@xxxxxxxxxxxxxxxxxxx> wrote:
>>> https://bugzilla.kernel.org/show_bug.cgi?id=88131
>>>
>>>             Bug ID: 88131
>>>            Summary: PCI device intel ixgbe and xhci with 64-bit bar
>>>                     address can NOT work on x86_32 PAE kernel.
>>>            Product: Drivers
>>>            Version: 2.5
>>>     Kernel Version: 3.18-rc4
>>>           Hardware: i386
>>>                 OS: Linux
>>>               Tree: Mainline
>>>             Status: NEW
>>>           Severity: normal
>>>           Priority: P1
>>>          Component: PCI
>>>           Assignee: drivers_pci@xxxxxxxxxxxxxxxxxxxx
>>>           Reporter: mapengyu@xxxxxxxxx
>>>         Regression: No
>>>
>>> Created attachment 157441
>>>   --> https://bugzilla.kernel.org/attachment.cgi?id=157441&action=edit
>>> dmesg
>>>
>>> PCI device intel ixgbe and xhci with 64-bit bar address can NOT work on x86_32
>>> kernel.
>>>
>>> The bar0 base address of intel ixgbe ethernet card and xhci are above 4G.
>>> The commit d56dbf5bab8ce44c5407bb099f71987f58d18bb4 try to map the resource
>>> above 4G.
>>> Enabled PAE and HIGHMEM64G, it should support 64-bit BAR, but failed on high
>>> bar address.
>>
>> Can you also attach your .config to the bugzilla?
>>
>> Is this a regression?  Did it work correctly before d56dbf5bab8c
>> ("PCI: Allocate 64-bit BARs above 4G when possible")?
>>
>> I assume this is the problem you're seeing (for igbe):
>
> This is some kind of bug that is uncovered by that commit.
>
> I already have two patches for ixgbe one.
>
> but xhci could be different problem.
>
> Aaron, can you split the bug to two ?
> one for ixgbe and one for xhci.
>
> Thanks
>
> Yinghai
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