Re: [SeaBIOS] [PATCH RFC] acpi: add ssdt for cpi hotplug

[Wen Congyang <wency@cn.fujitsu.com>]

At 11/02/2011 02:08 PM, Wen Congyang Write:
> At 11/02/2011 03:11 AM, Michael S. Tsirkin Write:
>> So here's the plan: move all hotplug handling out
>> to ssdt, this way it'll keep working even with a
>> user-supplied dsdt. Next step we can patch
>> this ssdt at runtime.
>>
>> There's little point in this change alone, so posting as RFC,
>> will repost with the patching part when it's ready,
>> posting now to present opportunity for early feedback.
>>
>> Compiled only.
> 
> Hot plug on PCI bus 0 can not work with this patch.
> It can works without this patch.

I think that I may find the reason:
================================
# ls -l /sys/firmware/acpi/tables/
total 0
-r--------. 1 root root 0 Nov  2 14:23 APIC
-r--------. 1 root root 0 Nov  2 14:23 DSDT
drwxr-xr-x. 2 root root 0 Nov  2 14:23 dynamic
-r--------. 1 root root 0 Nov  2 14:23 FACP
-r--------. 1 root root 0 Nov  2 14:23 FACS
-r--------. 1 root root 0 Nov  2 14:23 HPET
-r--------. 1 root root 0 Nov  2 14:23 SSDT
# ls -l /sys/firmware/acpi/tables/dynamic/
total 0
================================

The kernel only loads one SSDT. I use iasl to look at the
content of SSDT, and find that it is ssdt-proc.dsl.

The kernel does not load ssdt-pcihp.dsl.

Thanks
Wen Congyang