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

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Date:	Thu, 22 Dec 2011 12:49:15 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Thomas Renninger <trenn@...e.de>
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 Thu, Dec 22, 2011 at 04:29:16PM +0100, Thomas Renninger wrote:
> 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 would prefer to keep them separated, Kay's patchkit is gigantic.

They can be always merged later, but a dependency is not really
needed. It doesn't matter much whether it's in cpuid or in cpu.

> 
> 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 have nothing else.

-Andi
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