From: Borislav Petkov <bp@alien8.de>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: "Woods, Brian" <Brian.Woods@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
"x86@kernel.org" <x86@kernel.org>,
Clemens Ladisch <clemens@ladisch.de>,
Jean Delvare <jdelvare@suse.com>,
Guenter Roeck <linux@roeck-us.net>, Pu Wen <puwen@hygon.cn>,
Jia Zhang <qianyue.zj@alibaba-inc.com>,
Takashi Iwai <tiwai@suse.de>, Andy Whitcroft <apw@canonical.com>,
Colin Ian King <colin.king@canonical.com>,
Myron Stowe <myron.stowe@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-hwmon@vger.kernel.org" <linux-hwmon@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>
Subject: Re: [PATCH 2/4] x86/amd_nb: add support for newer PCI topologies
Date: Tue, 6 Nov 2018 23:00:59 +0100 [thread overview]
Message-ID: <20181106220059.GA4139@zn.tnic> (raw)
In-Reply-To: <20181106214256.GA65443@google.com>
On Tue, Nov 06, 2018 at 03:42:56PM -0600, Bjorn Helgaas wrote:
> This isn't some complicated new device where the programming model
> changed on the new CPU. This is a thermometer that was already
> supported. ACPI provides plenty of functionality that could be used
> to support this generically, e.g., see drivers/acpi/thermal.c,
> drivers/thermal/int340x_thermal/processor_thermal_device.c, etc.
Ok, you say ACPI but how do you envision practically doing that? I mean,
this is used by old boxes too - ever since K8. So how do we go and add
ACPI functionality to old boxes?
Or do you mean it should simply be converted to do pci_register_driver()
with a struct pci_driver pointer which has all those PCI device IDs in a
table? I'm looking at the last example
drivers/thermal/int340x_thermal/processor_thermal_device.c you gave above.
> But maybe there's some real value in the nitty-gritty device-specific
> code in amd_nb.c. If so, I guess you're stuck with updates like this
> and negotiating with the distros to do backports and new releases.
Well, even if it is converted to a different registration scheme, you
still need to add new PCI device IDs to the table, no? So *some* sort of
enablement still needs to happen.
And then the argument about needing enablement for distros is moot
because it still needs enablement/backporting - regardless of the
registration scheme.
Or do you mean something else?
I mean, don't get me wrong, I don't mind if it gets converted to
pci_register_driver() if you think it fits better this way with the
drivers registering with PCI devices - I'm just trying to understand the
reasoning for it.
Thx.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
next prev parent reply other threads:[~2018-11-06 22:01 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-02 18:11 [PATCH 0/4] Update DF/SMN access and k10temp for AMD F17h M30h Woods, Brian
2018-11-02 18:11 ` [PATCH 1/4] k10temp: x86/amd_nb: consolidate shared device IDs Woods, Brian
2018-11-02 18:24 ` Guenter Roeck
2018-11-02 18:11 ` [PATCH 2/4] x86/amd_nb: add support for newer PCI topologies Woods, Brian
2018-11-02 19:59 ` Bjorn Helgaas
2018-11-02 23:29 ` Borislav Petkov
2018-11-05 21:45 ` Bjorn Helgaas
2018-11-05 21:56 ` Borislav Petkov
2018-11-06 21:42 ` Bjorn Helgaas
2018-11-06 22:00 ` Borislav Petkov [this message]
2018-11-06 23:20 ` Bjorn Helgaas
2018-11-07 9:18 ` Borislav Petkov
2018-11-07 13:38 ` Bjorn Helgaas
2018-11-07 16:07 ` Borislav Petkov
2018-11-07 17:10 ` Bjorn Helgaas
2018-11-07 17:17 ` Borislav Petkov
2018-11-07 19:50 ` Woods, Brian
2018-11-07 13:51 ` Guenter Roeck
2018-11-07 17:16 ` Bjorn Helgaas
2018-11-07 19:15 ` Srinivas Pandruvada
2018-11-07 21:31 ` Bjorn Helgaas
2018-11-07 22:42 ` Srinivas Pandruvada
2018-11-07 23:14 ` Bjorn Helgaas
2018-11-07 23:30 ` Srinivas Pandruvada
2018-11-07 23:44 ` Srinivas Pandruvada
2018-11-08 1:40 ` Guenter Roeck
2018-11-08 13:59 ` Bjorn Helgaas
2018-11-05 19:38 ` Borislav Petkov
2018-11-05 20:33 ` Woods, Brian
2018-11-05 21:42 ` Borislav Petkov
2018-11-05 23:32 ` Woods, Brian
2018-11-06 8:27 ` Borislav Petkov
2018-11-02 18:11 ` [PATCH 3/4] x86/amd_nb: add PCI device IDs for F17h M30h Woods, Brian
2018-11-02 18:11 ` [PATCH 4/4] hwmon: k10temp: add support for AMD F17h M30h CPUs Woods, Brian
2018-11-02 18:26 ` Guenter Roeck
2018-11-05 20:32 ` Borislav Petkov
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