From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: 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>,
Arnd Bergmann <arnd@arndb.de>,
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: Thu, 10 Apr 2014 09:49:51 +1000 [thread overview]
Message-ID: <1397087391.3671.153.camel@pasglop> (raw)
In-Reply-To: <CAErSpo4BmoYzf6GxOPRni=q563zhON57s7=5Hz=2Cf-X2ft-1A@mail.gmail.com>
On Wed, 2014-04-09 at 08:02 -0600, 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'd rather keep the ability for the architecture to assign domain
numbers.
I'm working on making them relate to the physical slot numbers
on our new systems so we get predictable PCI IDs which helps with
some stuff like the new network device naming scheme etc...
Predictability is a good thing :-)
> I probably don't understand what you intend by reversing the order.
> Are you suggesting something like new pcibios_*() interfaces the arch
> can use to get the host bridge apertures and domain number?
Cheers,
Ben.
next prev parent reply other threads:[~2014-04-09 23:49 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
2014-04-09 23:49 ` Benjamin Herrenschmidt [this message]
[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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