Re: [Xen-devel] Re: "ACPI: Unable to start the ACPI Interpreter"

[Liwei <xieliwei@xxxxxxxxx>]

Hmm, here's the mapped IRQ list, interestingly IRQ 20 is on the list but not 9?

[    3.611820] acpi_get_override_irq:
[    3.611821] find_irq_entry:
[    3.611823] apic: 0 pin: 9 type: 0 mpc_ioapic_id: 8 MP_APIC_ALL: 255
[    3.611825] i: 0 irqtype: 0 dstapic: 8 dstirq: 2
[    3.611827] i: 1 irqtype: 0 dstapic: 8 dstirq: 20
[    3.611829] i: 2 irqtype: 0 dstapic: 8 dstirq: 1
[    3.611831] i: 3 irqtype: 0 dstapic: 8 dstirq: 3
[    3.611833] i: 4 irqtype: 0 dstapic: 8 dstirq: 4
[    3.611835] i: 5 irqtype: 0 dstapic: 8 dstirq: 5
[    3.611836] i: 6 irqtype: 0 dstapic: 8 dstirq: 6
[    3.611838] i: 7 irqtype: 0 dstapic: 8 dstirq: 7
[    3.611840] i: 8 irqtype: 0 dstapic: 8 dstirq: 8
[    3.611842] i: 9 irqtype: 0 dstapic: 8 dstirq: 10
[    3.611844] i: 10 irqtype: 0 dstapic: 8 dstirq: 11
[    3.611846] i: 11 irqtype: 0 dstapic: 8 dstirq: 12
[    3.611848] i: 12 irqtype: 0 dstapic: 8 dstirq: 13
[    3.611850] i: 13 irqtype: 0 dstapic: 8 dstirq: 14
[    3.611852] i: 14 irqtype: 0 dstapic: 8 dstirq: 15
[    3.611853] idx = -1 < 0, returning -1

On 28 June 2011 04:32, Liwei <xieliwei@xxxxxxxxx> wrote:
> Sorry this took a while. Somehow make decided to recompile everything.
>
> Seems like the reason for IRQ 9 not being remapped is idx = -1.
>
> On 28 June 2011 03:30, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
>> On Tue, Jun 28, 2011 at 03:18:21AM +0800, Liwei wrote:
>>> On 28 June 2011 03:10, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
>>> >
>>> > Another glance shows:
>>> >
>>> > (2.6.32):
>>> > [    3.502771] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)
>>> > [    3.502773] xen: sci override: source_irq=9 global_irq=20 trigger=c 
>>> > polarity=3
>>> > [    3.502775] xen: registering gsi 20 triggering 0 polarity 1
>>> > [    3.502780]   alloc irq_desc for 20 on node 0
>>> >
>>> > So it has IRQ 9 mapped to IRQ 20 while in 3.0:
>>> >
>>> > [    3.803695] xen: --> pirq=7 -> irq=7
>>> > [    3.803699] xen: --> pirq=8 -> irq=8
>>> > [    3.803702] xen: --> pirq=10 -> irq=10
>>> >
>>> > we skip over IRQ 9. We should have gotten something like this:
>>> >
>>> > [    7.059735] xen_map_pirq_gsi: returning irq 20 for gsi 9
>>> > [    7.064933] xen: --> pirq=20 -> irq=9
>>> >
>>> > But we did not. If you can instrument 'acpi_get_override_irq' to see
>>> > at which of the numerous 'return -1' it fails  that might narrow down
>>> > the issue.
>>> >
>>>
>>> Erm, do you want me to set up some kernel tracing or just add a printk
>>> to acpi_get_override_irq? My kernel hacking foo is very limited.
>>
>> Just splash some printk's around there and print out the values of gsi and 
>> pins.
>> Nothing fancy.
>>
>

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