linux-kernel - Re: [PATCH 2/4] x86/amd_nb: add support for newer PCI topologies

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Message-ID: <20181107091838.GA10835@zn.tnic>
Date:   Wed, 7 Nov 2018 10:18:38 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     "Woods, Brian" <Brian.Woods@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>,
        Clemens Ladisch <clemens@...isch.de>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>, Pu Wen <puwen@...on.cn>,
        Jia Zhang <qianyue.zj@...baba-inc.com>,
        Takashi Iwai <tiwai@...e.de>,
        Andy Whitcroft <apw@...onical.com>,
        Colin Ian King <colin.king@...onical.com>,
        Myron Stowe <myron.stowe@...hat.com>,
        Sumeet Pawnikar <sumeet.r.pawnikar@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [PATCH 2/4] x86/amd_nb: add support for newer PCI topologies

On Tue, Nov 06, 2018 at 05:20:41PM -0600, Bjorn Helgaas wrote:
> Or maybe even drivers/acpi/thermal.c, which claims every Thermal Zone
> (ACPI 6.2, sec 11), would be sufficient.  I don't know what the
> relationship between hwmon and other thermal stuff, e.g.,
> Documentation/thermal/sysfs-api.txt is.  acpi/thermal.c looks tied
> into the drivers/thermal stuff (it registers "thermal_zone" devices),
> but not to hwmon.

Err, I still don't think I'm catching your drift but let me stop you
right there: amd_nb is not there only for hwmon/k10temp. It is a small
interface glue if you will, which exports the CPU functionality in PCI
config space to other consumers.

So it is not really a driver - it is used by drivers to talk/query CPU
settings through it.

With that said, I don't think I understand all that talk about PNP IDs
and ACPI methods. But maybe I'm missing something...

So what's up?

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.