From: Carsten Schiers <carsten@schiers.de>
To: "Tian, Kevin" <kevin.tian@intel.com>,
xen-devel <xen-devel@lists.xensource.com>
Subject: AW: RE: RE: RE: No C-States any longer...
Date: Thu, 16 Jun 2011 08:47:53 +0200 [thread overview]
Message-ID: <27407493.491308206873767.JavaMail.root@uhura> (raw)
Maybe a dump question, but in the beginning of our discussion, we had:
>> In drivers/scpi/processor_idle.c:
...
>> On a working Intel machine, it will go through it like this:
>>
>> - acpi_processor_get_power_info_cst, which returns 0
>> - acpi_processor_get_power_info_default
>> - later acpi_processor_power_verify will find some c-states
>
>this is expected sequence
>
>>
>> On my non-working AMD machine, it will go through like this:
>> - acpi_processor_get_power_info_cst, which returns -ENODEV
>> - acpi_processor_get_power_info_fadt, which also return -ENODEV
>> - this result is returned
There is a comment in acpi_processor_get_power_info_default it is
said that all processors need to support C1 at least. So (hypothesis),
if my BIOS is not implemented as specified (neither _CST nor PBLK),
shouldn't acpi_processor_get_power_info_default also bee called on my
machine? Is the code exiting too early?
Carsten.
next reply other threads:[~2011-06-16 6:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-16 6:47 Carsten Schiers [this message]
2011-06-16 7:12 ` RE: RE: RE: No C-States any longer Tian, Kevin
-- strict thread matches above, loose matches on Subject: below --
2011-06-22 11:36 AW: " Carsten Schiers
2011-06-10 8:48 Tian, Kevin
2011-06-10 14:56 ` AW: " Carsten Schiers
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