On Tue, Aug 06, 2013 at 07:39:29AM -0600, Bjorn Helgaas wrote:
>> Personal Conclusion
>> ============================================================================
>> I think Bjorn's patch works.
>> Will test on powernv platform and give the result.
>
>Great, let me know what happens.
In both case, with/with out your patch, the assignment result is the same.
Below is the /proc/ioports file.
00010000-0080ffff : /io-hub@3efe00000000/pciex@3efe00080000
00010000-00010fff : Legacy IO
00020000-0003ffff : PCI Bus 0000:01
00020000-0003ffff : PCI Bus 0000:02
00020000-0002ffff : PCI Bus 0000:40
00030000-0003ffff : PCI Bus 0000:a0
00820000-0101ffff : /io-hub@3efe00000000/pciex@3efe00090000
00820000-00820fff : Legacy IO
00830000-0083ffff : PCI Bus 0001:01
01030000-0182ffff : /io-hub@3efe00000000/pciex@3efe000a0000
01030000-01030fff : Legacy IO
01040000-0104ffff : PCI Bus 0002:01
01840000-0203ffff : /io-hub@3efe00000000/pciex@3efe000b0000
01840000-01840fff : Legacy IO
01850000-0185ffff : PCI Bus 0003:01
02050000-0284ffff : /io-hub@3efe00000000/pciex@3efe000c0000
02050000-02050fff : Legacy IO
02060000-0206ffff : PCI Bus 0004:01
02860000-0305ffff : /io-hub@3efe00000000/pciex@3efe000d0000
02860000-02860fff : Legacy IO
02870000-0287ffff : PCI Bus 0005:01
The arch_align is 0x10000. When sizing for Bus 0000:01, its child has a I/O
bridge window with size 0x20000/alignment 0x10000. And the result
[0x20000,0x3ffff] looks like size 0x20000/alignment 0x20000 or size
0x20000/alignment 0x10000.
But I still think the alignment is 0x10000.
>
>Bjorn
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Richard Yang
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