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

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Date:	Wed, 21 Dec 2011 12:12:27 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Thomas Renninger <trenn@...e.de>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	hpa@...or.com, kay.sievers@....org, davej@...hat.com,
	kay.sievers@...y.org
Subject: Re: [PATCH 7/8] cpufreq: Add support for x86 cpuinfo auto loading
 v3

> > +static const struct x86_cpu_id powernow_k8_ids[] = {
> > +	{ X86_VENDOR_AMD, 0xf, },
> > +	{ X86_VENDOR_AMD, 0x10, },
> > +	{ X86_VENDOR_AMD, 0x11, },
> > +	{ X86_VENDOR_AMD, 0x12, },
> > +	{ X86_VENDOR_AMD, 0x13, },
> > +	{ X86_VENDOR_AMD, 0x14, },
> { X86_VENDOR_AMD, 0x15, },
> 
> Should also have BullDozer family included.

I think it really needs a cpuid feature bit for the hwpstate.  This is
not in one of the normal CPUID leaves, so the amd specific CPU init
code would need to set it.

I added 0x15 for now, but it would be good if someone with the hardware
fixed it like this.

Then could just add a match on "AMD-hw pstate" or so.

-Andi
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