From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Hanjun Guo <hanjun.guo@linaro.org>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Mark Rutland <mark.rutland@arm.com>,
linaro-kernel@lists.linaro.org,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Al Stone <al.stone@linaro.org>,
Graeme Gregory <graeme.gregory@linaro.org>,
patches@linaro.org, Olof Johansson <olof@lixom.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Linus Walleij <linus.walleij@linaro.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
linux-kernel@vger.kernel.org, Will Deacon <will.deacon@arm.com>,
linaro-acpi@lists.linaro.org, linux-acpi@vger.kernel.org,
Rob Herring <rob.herring@calxeda.com>,
Grant Likely <grant.likely@linaro.org>,
Jon Masters <jonathan@jonmasters.org>,
Bjorn Helgaas <bhelgaas@google.com>
Subject: Re: [RFC part1 PATCH 1/7] ACPI: Make ACPI core running without PCI on ARM64
Date: Thu, 5 Dec 2013 23:04:22 +0100 [thread overview]
Message-ID: <201312052304.22302.arnd@arndb.de> (raw)
In-Reply-To: <529F376F.8050005@linaro.org>
On Wednesday 04 December 2013, Hanjun Guo wrote:
> On 2013年12月04日 00:41, Matthew Garrett wrote:
> > Given the number of #ifdefs you're adding, wouldn't it make more sense
> > to just add stub functions to include/linux/pci.h?
>
> Thanks for the suggestion :)
>
> I can add stub functions in include/linux/pci.h for raw_pci_read()/
> raw_pci_write(), then can remove #ifdefs for acpi_os_read/write_pci_configuration().
Actually I wonder about the usefulness of this patch in either form: Since ACPI
on ARM64 is only for servers, I would very much expect them to always come with
PCI, either physical host bridges with attached devices, or logical PCI functions
used to describe the on-SoC I/O devices. Even in case of virtual machines, you'd
normally use PCI as the method to communicate data about the virtio channels.
Can you name a realistic use-case where you'd want ACPI but not PCI?
Arnd
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WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC part1 PATCH 1/7] ACPI: Make ACPI core running without PCI on ARM64
Date: Thu, 5 Dec 2013 23:04:22 +0100 [thread overview]
Message-ID: <201312052304.22302.arnd@arndb.de> (raw)
In-Reply-To: <529F376F.8050005@linaro.org>
On Wednesday 04 December 2013, Hanjun Guo wrote:
> On 2013?12?04? 00:41, Matthew Garrett wrote:
> > Given the number of #ifdefs you're adding, wouldn't it make more sense
> > to just add stub functions to include/linux/pci.h?
>
> Thanks for the suggestion :)
>
> I can add stub functions in include/linux/pci.h for raw_pci_read()/
> raw_pci_write(), then can remove #ifdefs for acpi_os_read/write_pci_configuration().
Actually I wonder about the usefulness of this patch in either form: Since ACPI
on ARM64 is only for servers, I would very much expect them to always come with
PCI, either physical host bridges with attached devices, or logical PCI functions
used to describe the on-SoC I/O devices. Even in case of virtual machines, you'd
normally use PCI as the method to communicate data about the virtio channels.
Can you name a realistic use-case where you'd want ACPI but not PCI?
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Hanjun Guo <hanjun.guo@linaro.org>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Mark Rutland <mark.rutland@arm.com>,
linaro-kernel@lists.linaro.org,
"Russell King - ARM Linux" <linux@arm.linux.org.uk>,
Al Stone <al.stone@linaro.org>,
Graeme Gregory <graeme.gregory@linaro.org>,
patches@linaro.org, Olof Johansson <olof@lixom.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Linus Walleij <linus.walleij@linaro.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
linux-kernel@vger.kernel.org, Will Deacon <will.deacon@arm.com>,
linaro-acpi@lists.linaro.org, linux-acpi@vger.kernel.org,
Rob Herring <rob.herring@calxeda.com>,
Grant Likely <grant.likely@linaro.org>,
Jon Masters <jonathan@jonmasters.org>,
Bjorn Helgaas <bhelgaas@google.com>
Subject: Re: [RFC part1 PATCH 1/7] ACPI: Make ACPI core running without PCI on ARM64
Date: Thu, 5 Dec 2013 23:04:22 +0100 [thread overview]
Message-ID: <201312052304.22302.arnd@arndb.de> (raw)
In-Reply-To: <529F376F.8050005@linaro.org>
On Wednesday 04 December 2013, Hanjun Guo wrote:
> On 2013年12月04日 00:41, Matthew Garrett wrote:
> > Given the number of #ifdefs you're adding, wouldn't it make more sense
> > to just add stub functions to include/linux/pci.h?
>
> Thanks for the suggestion :)
>
> I can add stub functions in include/linux/pci.h for raw_pci_read()/
> raw_pci_write(), then can remove #ifdefs for acpi_os_read/write_pci_configuration().
Actually I wonder about the usefulness of this patch in either form: Since ACPI
on ARM64 is only for servers, I would very much expect them to always come with
PCI, either physical host bridges with attached devices, or logical PCI functions
used to describe the on-SoC I/O devices. Even in case of virtual machines, you'd
normally use PCI as the method to communicate data about the virtio channels.
Can you name a realistic use-case where you'd want ACPI but not PCI?
Arnd
next prev parent reply other threads:[~2013-12-05 22:05 UTC|newest]
Thread overview: 164+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-03 16:36 [RFC part1 PATCH 0/7] Make ACPI core running on ARM64 Hanjun Guo
2013-12-03 16:36 ` Hanjun Guo
2013-12-03 16:36 ` [RFC part1 PATCH 1/7] ACPI: Make ACPI core running without PCI " Hanjun Guo
2013-12-03 16:36 ` Hanjun Guo
2013-12-03 16:41 ` Matthew Garrett
2013-12-03 16:41 ` Matthew Garrett
2013-12-04 14:08 ` Hanjun Guo
2013-12-04 14:08 ` Hanjun Guo
2013-12-04 14:08 ` Hanjun Guo
2013-12-05 22:04 ` Arnd Bergmann [this message]
2013-12-05 22:04 ` Arnd Bergmann
2013-12-05 22:04 ` Arnd Bergmann
2013-12-06 15:04 ` [Linaro-acpi] " Tomasz Nowicki
2013-12-06 15:04 ` Tomasz Nowicki
2013-12-06 17:23 ` Arnd Bergmann
2013-12-06 17:23 ` Arnd Bergmann
2013-12-06 17:23 ` Arnd Bergmann
2013-12-09 4:12 ` Hanjun Guo
2013-12-09 4:12 ` Hanjun Guo
2013-12-09 4:12 ` Hanjun Guo
2013-12-09 11:50 ` Catalin Marinas
2013-12-09 11:50 ` Catalin Marinas
2013-12-09 13:05 ` Hanjun Guo
2013-12-09 13:05 ` Hanjun Guo
2013-12-09 13:05 ` Hanjun Guo
2013-12-09 16:35 ` Arnd Bergmann
2013-12-09 16:35 ` Arnd Bergmann
2013-12-09 16:55 ` Catalin Marinas
2013-12-09 16:55 ` Catalin Marinas
2013-12-09 17:20 ` Arnd Bergmann
2013-12-09 17:20 ` Arnd Bergmann
2013-12-09 18:01 ` Catalin Marinas
2013-12-09 18:01 ` Catalin Marinas
2013-12-16 20:51 ` Graeme Gregory
2013-12-16 20:51 ` Graeme Gregory
2013-12-17 11:29 ` Catalin Marinas
2013-12-17 11:29 ` Catalin Marinas
2013-12-19 11:30 ` Graeme Gregory
2013-12-19 11:30 ` Graeme Gregory
2013-12-19 14:01 ` Arnd Bergmann
2013-12-19 14:01 ` Arnd Bergmann
2013-12-19 14:01 ` Arnd Bergmann
2013-12-19 15:43 ` Catalin Marinas
2013-12-19 15:43 ` Catalin Marinas
2013-12-20 19:55 ` Mark Brown
2013-12-20 19:55 ` Mark Brown
2013-12-10 2:53 ` Hanjun Guo
2013-12-10 2:53 ` Hanjun Guo
2013-12-09 17:06 ` Matthew Garrett
2013-12-09 17:06 ` Matthew Garrett
2013-12-10 1:52 ` Hanjun Guo
2013-12-10 1:52 ` Hanjun Guo
2013-12-10 3:28 ` Arnd Bergmann
2013-12-10 3:28 ` Arnd Bergmann
2013-12-10 3:28 ` Arnd Bergmann
2013-12-10 19:22 ` Mark Brown
2013-12-10 19:22 ` Mark Brown
2013-12-10 19:22 ` Mark Brown
2013-12-10 20:00 ` Arnd Bergmann
2013-12-10 20:00 ` Arnd Bergmann
2013-12-10 20:00 ` Arnd Bergmann
2013-12-10 20:23 ` Mark Brown
2013-12-10 20:23 ` Mark Brown
2013-12-10 20:23 ` Mark Brown
2013-12-11 3:07 ` Arnd Bergmann
2013-12-11 3:07 ` Arnd Bergmann
2013-12-11 3:07 ` Arnd Bergmann
2013-12-11 11:02 ` Mark Brown
2013-12-11 11:02 ` Mark Brown
2013-12-11 11:02 ` Mark Brown
2013-12-10 9:56 ` Linus Walleij
2013-12-10 9:56 ` Linus Walleij
2013-12-09 23:34 ` Rob Herring
2013-12-09 23:34 ` Rob Herring
2013-12-09 23:34 ` Rob Herring
2013-12-03 16:47 ` One Thousand Gnomes
2013-12-03 16:47 ` One Thousand Gnomes
2013-12-04 14:15 ` Hanjun Guo
2013-12-04 14:15 ` Hanjun Guo
2013-12-03 16:36 ` [RFC part1 PATCH 2/7] ARM64 : Add dummy asm/cpu.h Hanjun Guo
2013-12-03 16:36 ` Hanjun Guo
2013-12-03 17:13 ` Mark Rutland
2013-12-03 17:13 ` Mark Rutland
2013-12-03 17:13 ` Mark Rutland
2013-12-04 15:00 ` Hanjun Guo
2013-12-04 15:00 ` Hanjun Guo
2013-12-04 15:00 ` Hanjun Guo
2013-12-03 17:59 ` Mark Brown
2013-12-03 17:59 ` Mark Brown
2013-12-03 16:36 ` [RFC part1 PATCH 3/7] ACPI / processor_core: Rework _PDC related stuff to make it more arch-independent Hanjun Guo
2013-12-03 16:36 ` Hanjun Guo
2013-12-03 16:46 ` Matthew Garrett
2013-12-03 16:46 ` Matthew Garrett
2013-12-04 14:11 ` Hanjun Guo
2013-12-04 14:11 ` Hanjun Guo
2013-12-03 16:51 ` One Thousand Gnomes
2013-12-03 16:51 ` One Thousand Gnomes
2013-12-03 16:51 ` One Thousand Gnomes
2013-12-03 17:02 ` Matthew Garrett
2013-12-03 17:02 ` Matthew Garrett
2013-12-04 14:16 ` Hanjun Guo
2013-12-04 14:16 ` Hanjun Guo
2013-12-04 14:16 ` Hanjun Guo
2013-12-03 16:36 ` [RFC part1 PATCH 4/7] ARM64 / ACPI: Introduce the skeleton of _PDC related for ARM64 Hanjun Guo
2013-12-03 16:36 ` Hanjun Guo
2013-12-03 16:53 ` One Thousand Gnomes
2013-12-03 16:53 ` One Thousand Gnomes
2013-12-03 16:53 ` One Thousand Gnomes
2013-12-04 14:17 ` Hanjun Guo
2013-12-04 14:17 ` Hanjun Guo
2013-12-03 17:12 ` Rob Herring
2013-12-03 17:12 ` Rob Herring
2013-12-04 14:30 ` Hanjun Guo
2013-12-04 14:30 ` Hanjun Guo
2013-12-03 16:36 ` [RFC part1 PATCH 5/7] ARM64 / ACPI: Introduce arm_core.c and its related head file Hanjun Guo
2013-12-03 16:36 ` Hanjun Guo
2013-12-03 18:03 ` Mark Rutland
2013-12-03 18:03 ` Mark Rutland
2013-12-03 18:03 ` Mark Rutland
2013-12-04 15:48 ` Hanjun Guo
2013-12-04 15:48 ` Hanjun Guo
2013-12-04 15:48 ` Hanjun Guo
2013-12-04 5:46 ` Zheng, Lv
2013-12-04 5:46 ` Zheng, Lv
2013-12-04 15:53 ` Hanjun Guo
2013-12-04 15:53 ` Hanjun Guo
2013-12-04 15:53 ` Hanjun Guo
2013-12-04 19:47 ` Al Stone
2013-12-04 19:47 ` Al Stone
2013-12-04 19:47 ` Al Stone
2013-12-05 3:38 ` Arnd Bergmann
2013-12-05 3:38 ` Arnd Bergmann
2013-12-05 13:51 ` Hanjun Guo
2013-12-05 13:51 ` Hanjun Guo
2013-12-05 20:40 ` Arnd Bergmann
2013-12-05 20:40 ` Arnd Bergmann
2013-12-05 20:40 ` Arnd Bergmann
2013-12-05 14:09 ` Rob Herring
2013-12-05 14:09 ` Rob Herring
2013-12-05 14:27 ` Hanjun Guo
2013-12-05 14:27 ` Hanjun Guo
2013-12-05 14:27 ` Hanjun Guo
2013-12-03 16:36 ` [RFC part1 PATCH 6/7] ARM64 / ACPI: Introduce lowlevel suspend function Hanjun Guo
2013-12-03 16:36 ` Hanjun Guo
2013-12-03 16:36 ` [RFC part1 PATCH 7/7] ARM64 / ACPI: Enable ARM64 in Kconfig Hanjun Guo
2013-12-03 16:36 ` Hanjun Guo
2013-12-04 10:10 ` Graeme Gregory
2013-12-04 10:10 ` Graeme Gregory
2013-12-04 15:55 ` Hanjun Guo
2013-12-04 15:55 ` Hanjun Guo
2013-12-04 15:55 ` Hanjun Guo
2013-12-05 22:25 ` [RFC part1 PATCH 0/7] Make ACPI core running on ARM64 Arnd Bergmann
2013-12-05 22:25 ` Arnd Bergmann
2013-12-06 13:58 ` Mark Brown
2013-12-06 13:58 ` Mark Brown
2013-12-06 13:58 ` Mark Brown
2013-12-08 2:44 ` Arnd Bergmann
2013-12-08 2:44 ` Arnd Bergmann
2013-12-08 19:40 ` Mark Brown
2013-12-08 19:40 ` Mark Brown
2013-12-08 19:40 ` Mark Brown
2013-12-10 9:45 ` Linus Walleij
2013-12-10 9:45 ` Linus Walleij
2013-12-10 9:45 ` Linus Walleij
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