linux-kernel - Re: [PATCH v2] acpi: Fix regression where _PPC is not read at boot even when ignore

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Date:	Thu, 30 Apr 2009 11:17:46 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Thomas Renninger <trenn@...e.de>
Cc:	djwong@...ibm.com, Len Brown <lenb@...nel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	cpufreq@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v2] acpi: Fix regression where _PPC is not read at boot
	even when ignore_ppc=0


* Thomas Renninger <trenn@...e.de> wrote:

> On Wednesday 29 April 2009 11:43:12 pm Darrick J. Wong wrote:
> > On Wed, Apr 29, 2009 at 03:19:28PM +0200, Thomas Renninger wrote:
> > > Ingo, did you do a BIOS update in between?
> > > The DSDT and SSDTs you added do not contain a _PPC function.
> > > These ACPI tables definitely do not suffer from an initial _PPC
> > > evaluation.
> >
> > P-state tables are probably loaded from separate SSDT tables "CPU0IST" and
> > "CPU1IST".  You can download 'em with something like this:
> >
> > # dmesg | grep IST
> > ACPI: SSDT BFD30566, 01FB (r1  PmRef    CPU0IST   3000 INTL 20030224)
> >            ^addr     ^length
> >
> > # acpidump --addr 0xBFD30566 --length 0x1FB > cpu0ist
> > # iasl -d cpu0ist
> >
> > Then paste cpu0ist.dsl somewhere.
> 
> Oops forgot about the tables loaded at runtime, I take back the definitely :)
> Ingo, can you also do:
> acpidump --addr 0x7F6E609E --length 0x1ED >cpu0ist
> acpidump --addr 0x7F6E628B --length 0x94 >cpu1ist
> acpidump --addr 0x7F6E5DE1 --length 0x238 >cpu0cst
> acpidump --addr 0x7F6E6019 --length 0x85 >cpu1cst

sure - attached.

	Ingo

Download attachment "cpu0ist" of type "application/octet-stream" (493 bytes)

Download attachment "cpu1ist" of type "application/octet-stream" (148 bytes)

Download attachment "cpu0cst" of type "application/octet-stream" (568 bytes)

Download attachment "cpu1cst" of type "application/octet-stream" (133 bytes)