linux-kernel - Re: [PATCH 7/8] cpufreq: Add support for x86 cpuinfo auto loading v3

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Date:	Thu, 22 Dec 2011 16:29:16 +0100
From:	Thomas Renninger <trenn@...e.de>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Dave Jones <davej@...hat.com>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	kay.sievers@...y.org, gregkh@...e.de
Subject: Re: [PATCH 7/8] cpufreq: Add support for x86 cpuinfo auto loading v3

On Thursday, December 22, 2011 01:14:41 AM Andi Kleen wrote:
> > So this should be:
> > 
> > 1. added to the scattered CPUID features list;
> > 2. artificially set in the AMD-specific initialization code for the
> > older CPUs.
> 
> Not sure (2) is correct. As far as I understand it's actually different
> mechanisms, just implemented by the same driver.
> 
> Keeping the list for old CPUs is not a big issue anyways.
> 
> Agreed with (1)
> 
> Anyways someone with the hardware should do it. Thomas?
I have something.

Andi: If you don't mind, I'll pick up your patches,
use drivers/base/cpu.c instead of cpuid driver. Then there
will never show up a cpuid version mainline.
I'll call it v4 and this patchset then depends on Kay's work.

I'll also adjust:
  - the microcode typo (in patch fix)
  - add a cpuid hw_pstate (new patch)
  - adjust powernow-k8 to make use of it via x86cpu autoloading
    (in patch adjustings)

Tell me (best in the next hour) if something else should
still be added.

I'll then resend with your From: tag on top.

No idea in which tree this should end (x86-tip, because it's a
x86 feature or Greg's because no further serialization care has
to be taken. I'll vote for Greg's, I already work on his
driver-core tree on the driver-core-next branch where Kay's
stuff already is in).

I'll add everybody to CC.

   Thomas
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