linux-kernel - Re: [PATCH 05/11] x86, pci, acpi: Move arch-agnostic MMCONFIG (aka ECAM) and ACPI code out of arch/x86/ directory

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Date:	Tue, 26 May 2015 18:08:18 +0100
From:	Will Deacon <will.deacon@....com>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>, Arnd Bergmann <arnd@...db.de>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Yijing Wang <wangyijing@...wei.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Tomasz Nowicki <tomasz.nowicki@...aro.org>,
	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
	"msalter@...hat.com" <msalter@...hat.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>
Subject: Re: [PATCH 05/11] x86, pci, acpi: Move arch-agnostic MMCONFIG (aka
 ECAM) and ACPI code out of arch/x86/ directory

On Tue, May 26, 2015 at 01:49:18PM +0100, Hanjun Guo wrote:
> From: Tomasz Nowicki <tomasz.nowicki@...aro.org>
> 
> ECAM standard and MCFG table are architecture independent and it makes
> sense to share common code across all architectures. Both are going to
> corresponding files - ecam.c and mcfg.c
> 
> While we are here, rename pci_parse_mcfg to acpi_parse_mcfg.
> We already have acpi_parse_mcfg prototype which is used nowhere.
> At the same time, we need pci_parse_mcfg been global so acpi_parse_mcfg
> can be used perfectly here.
> 
> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@...aro.org>
> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
> ---
>  arch/x86/Kconfig               |   3 +
>  arch/x86/include/asm/pci_x86.h |  33 ------
>  arch/x86/pci/acpi.c            |   1 +
>  arch/x86/pci/mmconfig-shared.c | 244 +---------------------------------------
>  arch/x86/pci/mmconfig_32.c     |   1 +
>  arch/x86/pci/mmconfig_64.c     |   1 +
>  arch/x86/pci/numachip.c        |   1 +
>  drivers/acpi/Makefile          |   1 +
>  drivers/acpi/mcfg.c            |  57 ++++++++++
>  drivers/pci/Kconfig            |   7 ++
>  drivers/pci/Makefile           |   5 +
>  drivers/pci/ecam.c             | 245 +++++++++++++++++++++++++++++++++++++++++

Why can't we make use of the ECAM implementation used by pci-host-generic
and drivers/pci/access.c?

Will
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