linux-kernel - Re: [patch 3/3] x86: io-apic - code style cleaning for setup_IO_APIC

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Message-ID: <aa79d98a0809072217m3d8c7fcdg3f578fd3a4528093@mail.gmail.com>
Date:	Mon, 8 Sep 2008 09:17:04 +0400
From:	"Cyrill Gorcunov" <gorcunov@...il.com>
To:	"Yinghai Lu" <yhlu.kernel@...il.com>
Cc:	"Ingo Molnar" <mingo@...e.hu>, hpa@...or.com,
	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	macro@...ux-mips.org
Subject: Re: [patch 3/3] x86: io-apic - code style cleaning for setup_IO_APIC_irqs

On Mon, Sep 8, 2008 at 9:07 AM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
> On Sun, Sep 7, 2008 at 9:38 PM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
>> On Sun, Sep 7, 2008 at 9:20 PM, Cyrill Gorcunov <gorcunov@...il.com> wrote:
>>> On Mon, Sep 8, 2008 at 4:24 AM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
>>>> On Sat, Sep 6, 2008 at 6:12 AM, Ingo Molnar <mingo@...e.hu> wrote:
>>>>>
>>>>> * Cyrill Gorcunov <gorcunov@...il.com> wrote:
>>>>>
>>>>>> By changing printout form we are able to shrink code a bit.
>>>>>>
>>>>>> Former printout example:
>>>>>>
>>>>>>       init IO_APIC IRQs
>>>>>>        IO-APIC (apicid-pin) 1-1, 1-2, 1-3 not connected.
>>>>>>        IO-APIC (apicid-pin) 2-1, 2-2, 2-3 not connected.
>>>>>>
>>>>>> New printout example:
>>>>>>
>>>>>>       init IO_APIC IRQs
>>>>>>        1-1 1-2 1-3 (apicid-pin) not connected
>>>>>>        2-1 2-2 2-3 (apicid-pin) not connected
>>>>>
>>>>> applied to tip/irq/sparseirq - thanks Cyrill.
>>>>
>>>> got
>>>>  0-16<7> 0-17<7> 0-18<7> 0-19<7> 0-20<7> 0-21<7> 0-22<7> 0-23<7>
>>>> (apicid-pin) not connected
>>>>  1-0<7> 1-1<7> 1-2<7> 1-3<7> 1-4<7> 1-5<7> 1-6<7> 1-7<7> 1-8<7> 1-9<7>
>>>> 1-10<7> 1-11<7> 1-12<7> 1-13<7> 1-14<7> 1-15<7> 1-16<7> 1-17<7>
>>>> 1-18<7> 1-19<7> 1-20<7> 1-21<7> 1-22<7> 1-23<7> (apicid-pin) not
>>>> connected
>>>>
>>>> can you remove the extra <7>?
>>>>
>>>> YH
>>>>
>>>
>>> Btw Yinghai, do you really have a machine with that many unconnected pins?
>>
>> Yes
>>
>> recent change in sparseirq, we only init irq [0,16) at that point. so
>> pins on other io apic controller all unconnected...
>>
> correction: sparseirq does not change the behavoir...
>
> ENABLING IO-APIC IRQs
> init IO_APIC IRQs
>  IO-APIC (apicid-pin) 0-0 not connected.
> IOAPIC[0]: Set routing entry (0-1 -> 0x31 -> IRQ 1 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-2 -> 0x30 -> IRQ 0 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-3 -> 0x33 -> IRQ 3 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-4 -> 0x34 -> IRQ 4 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-5 -> 0x35 -> IRQ 5 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-6 -> 0x36 -> IRQ 6 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-7 -> 0x37 -> IRQ 7 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-8 -> 0x38 -> IRQ 8 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-9 -> 0x39 -> IRQ 9 Mode:1 Active:0)
> IOAPIC[0]: Set routing entry (0-10 -> 0x3a -> IRQ 10 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-11 -> 0x3b -> IRQ 11 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-12 -> 0x3c -> IRQ 12 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-13 -> 0x3d -> IRQ 13 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-14 -> 0x3e -> IRQ 14 Mode:0 Active:0)
> IOAPIC[0]: Set routing entry (0-15 -> 0x3f -> IRQ 15 Mode:0 Active:0)
>  IO-APIC (apicid-pin) 0-16, 0-17, 0-18, 0-19, 0-20, 0-21, 0-22, 0-23,
> 1-0, 1-1, 1-2, 1-3, 1-4, 1-5, 1-6, 2-0, 2-1, 2-2, 2-3, 2-4, 2-5, 2-6,
> 3-0, 3-1, 3-2, 3-3, 3-4, 3-5, 3-6, 3-7, 3-8, 3-9, 3-10, 3-11, 3-12,
> 3-13, 3-14, 3-15, 3-16, 3-17, 3-18, 3-19, 3-20, 3-21, 3-22, 3-23 not
> connected.
>
> there is some difference between using acpi or mptable...
>
> when mpatble is used, mp_irqs is all filled after mptable is parsed.
>
> when acpi is used, one [0-15) is filled..., later it will fill entries
> when acpi add entries...mp_register_gsi/mp_config_acpi_gsi
>
> YH
>

thanks for explanation Yinghai, i was reffering to MP and didn't take
a look on ACPI facility (that is why I've asked you). Thanks!
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