linux-kernel - Re: 4.3-rc3 BAR allocation problems on multiple machines

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Message-ID: <CAE9FiQUVom8RaEMDFHSZer3inB_QuckqxS6Dgsid0JcSHUFEFw@mail.gmail.com>
Date:	Mon, 12 Oct 2015 23:21:43 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Meelis Roos <mroos@...ux.ee>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: 4.3-rc3 BAR allocation problems on multiple machines

On Mon, Oct 12, 2015 at 10:43 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> On Mon, Oct 12, 2015 at 10:06 PM, Meelis Roos <mroos@...ux.ee> wrote:
>>> >> > sparc64 machines:
>>
>> Updated on V210 - the others were more recent. Now I get more BAR
>> warning there too:
>>
>> http://kodu.ut.ee/~mroos/dm/dm.v210+patches
>>
>
> interesting, mem and mem64 is overlapping.
>
> [   38.824625] /pci@1f,700000: TOMATILLO PCI Bus Module ver[4:0]
> [   38.824654] /pci@1f,700000: PCI IO [io
> 0x7f601000000-0x7f601ffffff] offset 7f601000000
> [   38.824680] /pci@1f,700000: PCI MEM [mem
> 0x7f700000000-0x7f7ffffffff] offset 7f700000000
> [   38.824704] /pci@1f,700000: PCI MEM64 [mem
> 0x7f700000000-0x7f7ffffffff] offset 7f700000000
> [   38.826310] PCI: Scanning PBM /pci@1f,700000
> [   38.826479] schizo f0069c00: PCI host bridge to bus 0000:00
> [   38.826506] pci_bus 0000:00: root bus resource [io
> 0x7f601000000-0x7f601ffffff] (bus address [0x0000-0xffffff])
> [   38.826536] pci_bus 0000:00: root bus resource [mem
> 0x7f700000000-0x7f7ffffffff] (bus address [0x00000000-0xffffffff])
> [   38.826565] pci_bus 0000:00: root bus resource [mem
> 0x7f700000000-0x7f7ffffffff] (bus address [0x00000000-0xffffffff])
>

For overlapping, please check attached patch that should fix the problem.

Thanks

Yinghai

View attachment "fix_mem_mem64_overlapping.patch" of type "text/x-patch" (1905 bytes)