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:	Wed, 27 May 2015 10:06:26 +0200
From:	Tomasz Nowicki <tomasz.nowicki@...aro.org>
To:	Will Deacon <will.deacon@....com>,
	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>,
	"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 26.05.2015 19:08, Will Deacon wrote:
> 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?

We had that question when I had posted MMCFG patch set separately, 
please see:
https://lkml.org/lkml/2015/3/11/492

Tomasz
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