From: Arnd Bergmann <arnd@arndb.de>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
linux-pci <linux-pci@vger.kernel.org>,
Catalin Marinas <Catalin.Marinas@arm.com>,
Will Deacon <Will.Deacon@arm.com>,
linaro-kernel <linaro-kernel@lists.linaro.org>,
LKML <linux-kernel@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
LAKML <linux-arm-kernel@lists.infradead.org>,
Tanmay Inamdar <tinamdar@apm.com>,
Grant Likely <grant.likely@secretlab.ca>
Subject: Re: [PATCH v7 4/6] pci: Introduce a domain number for pci_host_bridge.
Date: Wed, 09 Apr 2014 16:08:43 +0200 [thread overview]
Message-ID: <5040304.p3jyCMi26Y@wuerfel> (raw)
In-Reply-To: <CAErSpo4BmoYzf6GxOPRni=q563zhON57s7=5Hz=2Cf-X2ft-1A@mail.gmail.com>
On Wednesday 09 April 2014 08:02:41 Bjorn Helgaas wrote:
>
> It's possible we could manage domain numbers in the core. On ACPI
> systems, we currently we use the ACPI _SEG value as the domain. In
> some cases, e.g., on ia64, config space access is done via firmware
> interfaces, and those interfaces expect the _SEG values. We could
> conceivably maintain a mapping between _SEG and domain, but I'm not
> sure there's an advantage there.
I think it's a safe assumption that we will never have more than
one firmware trying to enumerate the domains, so it would be
safe to let ACPI keep doing its own thing for domain numbers,
have the DT code pick domain number using some method we come up
with, and for everything else let the architecture code deal with
it. There are probably very few systems that have multiple domains
but use neither ACPI nor DT.
Arnd
next prev parent reply other threads:[~2014-04-09 14:08 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-14 15:34 [PATCH v7 0/6] Support for creating generic host_bridge from device tree Liviu Dudau
2014-03-14 15:34 ` [PATCH v7 1/6] pci: Introduce pci_register_io_range() helper function Liviu Dudau
[not found] ` <1394811272-1547-2-git-send-email-Liviu.Dudau-5wv7dgnIgG8@public.gmane.org>
2014-04-05 0:19 ` Bjorn Helgaas
2014-04-06 9:49 ` Benjamin Herrenschmidt
2014-04-07 8:35 ` Liviu Dudau
2014-04-07 9:13 ` Benjamin Herrenschmidt
2014-04-07 11:16 ` Arnd Bergmann
[not found] ` <20140405001953.GE15806-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2014-04-07 8:31 ` Liviu Dudau
2014-04-07 11:36 ` Arnd Bergmann
2014-04-07 13:42 ` Liviu Dudau
2014-04-07 17:58 ` Bjorn Helgaas
2014-04-08 9:50 ` Liviu Dudau
2014-04-08 10:22 ` Arnd Bergmann
2014-04-08 16:54 ` Bjorn Helgaas
2014-06-26 8:59 ` Catalin Marinas
2014-06-26 9:30 ` Liviu Dudau
[not found] ` <20140626093029.GB12812-2JSQmVVBSi7ZROr8t4l/smS4ubULX0JqMm0uRHvK7Nw@public.gmane.org>
2014-06-26 14:11 ` Catalin Marinas
2014-06-26 14:14 ` Will Deacon
2014-06-27 0:44 ` Rob Herring
2014-06-27 11:03 ` Arnd Bergmann
2014-06-27 12:49 ` Will Deacon
2014-06-27 13:16 ` Arnd Bergmann
2014-06-27 13:38 ` Catalin Marinas
2014-06-27 16:15 ` Rob Herring
2014-06-30 10:17 ` Will Deacon
[not found] ` <CAL_JsqKCHf6VXR3FFcBSu1xuhP54dYsAJCZwT-X9p5iTZAOJfQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-06-27 14:14 ` Catalin Marinas
2014-06-27 14:55 ` Bjorn Helgaas
2014-06-27 15:18 ` Liviu Dudau
2014-04-07 23:21 ` Bjorn Helgaas
2014-04-08 7:12 ` Arnd Bergmann
2014-04-08 9:49 ` Liviu Dudau
2014-04-08 10:11 ` Arnd Bergmann
2014-04-08 16:48 ` Bjorn Helgaas
2014-03-14 15:34 ` [PATCH v7 2/6] pci: OF: Fix the conversion of IO ranges into IO resources Liviu Dudau
2014-03-14 17:05 ` Arnd Bergmann
2014-03-14 17:19 ` Liviu Dudau
2014-03-14 18:46 ` Arnd Bergmann
2014-03-14 19:00 ` Liviu Dudau
[not found] ` <20140314190017.GA6457-2JSQmVVBSi7ZROr8t4l/smS4ubULX0JqMm0uRHvK7Nw@public.gmane.org>
2014-03-14 19:16 ` Arnd Bergmann
2014-03-17 13:41 ` Liviu Dudau
2014-03-14 15:34 ` [PATCH v7 3/6] pci: Create pci_host_bridge before its associated bus in pci_create_root_bus Liviu Dudau
2014-03-14 15:34 ` [PATCH v7 4/6] pci: Introduce a domain number for pci_host_bridge Liviu Dudau
2014-04-05 0:00 ` Bjorn Helgaas
2014-04-07 8:46 ` Liviu Dudau
2014-04-07 9:14 ` Benjamin Herrenschmidt
2014-04-07 10:07 ` Liviu Dudau
2014-04-07 22:44 ` Bjorn Helgaas
2014-04-08 10:20 ` Liviu Dudau
[not found] ` <20140408102043.GV17163-2JSQmVVBSi7ZROr8t4l/smS4ubULX0JqMm0uRHvK7Nw@public.gmane.org>
2014-04-08 16:28 ` Bjorn Helgaas
2014-04-09 12:07 ` Liviu Dudau
2014-04-09 14:02 ` Bjorn Helgaas
2014-04-09 14:08 ` Arnd Bergmann [this message]
2014-04-09 23:49 ` Benjamin Herrenschmidt
[not found] ` <CAErSpo4BmoYzf6GxOPRni=q563zhON57s7=5Hz=2Cf-X2ft-1A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-10 1:27 ` Liviu Dudau
2014-04-10 3:48 ` Bjorn Helgaas
2014-04-10 8:00 ` Arnd Bergmann
2014-04-10 13:50 ` Bjorn Helgaas
[not found] ` <CAErSpo6u7kr+QdnhAXBo20izg-DNHR4zHT+kRvq34whp68RJCQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-10 14:07 ` Arnd Bergmann
2014-04-10 14:53 ` Liviu Dudau
2014-04-10 20:46 ` Arnd Bergmann
2014-04-11 5:01 ` Benjamin Herrenschmidt
2014-04-11 8:36 ` Arnd Bergmann
2014-04-11 9:16 ` Benjamin Herrenschmidt
2014-04-11 9:22 ` Liviu Dudau
2014-04-11 13:51 ` Arnd Bergmann
2014-07-01 16:37 ` Liviu Dudau
2014-07-04 14:57 ` Liviu Dudau
2014-07-08 1:11 ` Bjorn Helgaas
2014-07-08 10:21 ` Liviu Dudau
2014-03-14 15:34 ` [PATCH v7 5/6] pci: Export find_pci_host_bridge() function Liviu Dudau
2014-04-04 23:39 ` Bjorn Helgaas
2014-04-07 14:20 ` Liviu Dudau
2014-04-07 14:38 ` One Thousand Gnomes
2014-03-14 15:34 ` [PATCH v7 6/6] pci: Add support for creating a generic host_bridge from device tree Liviu Dudau
2014-04-08 12:57 ` Hanjun Guo
2014-04-08 13:09 ` Liviu Dudau
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