linux-kernel - Re: [PATCH 01/11] ARM64 / PCI: introduce struct pci

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150907084542.GA29293@red-moon>
Date:	Mon, 7 Sep 2015 09:45:42 +0100
From:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:	Ganapatrao Kulkarni <gpkulkarni@...il.com>
Cc:	"hanjun.guo@...aro.org" <hanjun.guo@...aro.org>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Liviu Dudau <Liviu.Dudau@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>,
	Will Deacon <Will.Deacon@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Tomasz Nowicki <tomasz.nowicki@...aro.org>,
	Yijing Wang <wangyijing@...wei.com>,
	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
	"msalter@...hat.com" <msalter@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 01/11] ARM64 / PCI: introduce struct pci_controller for
 ACPI

On Mon, Sep 07, 2015 at 05:14:22AM +0100, Ganapatrao Kulkarni wrote:
> Hi Hanjun,
> 
> On Wed, May 27, 2015 at 1:51 PM, Hanjun Guo <hanjun.guo@...aro.org> wrote:
> > Hi Liviu,
> >
> > On 2015???05???27??? 01:20, Jiang Liu wrote:
> >>
> >> On 2015/5/27 0:58, Liviu Dudau wrote:
> >>>
> >>> On Tue, May 26, 2015 at 01:49:14PM +0100, Hanjun Guo wrote:
> >>>>
> >>>> ARM64 ACPI based PCI host bridge init needs a arch dependent
> >>>> struct pci_controller to accommodate common PCI host bridge
> >>>> code which is introduced later, or it will lead to compile
> >>>> errors on ARM64.
> >>>
> >>>
> >>> Hi Hanjun,
> >>>
> >>> Two questions: why don't you introduce this patch next to the
> >>> one that is going to make use of it (or even merge it there)?
> >
> >
> > this is because of this patch is needed by Jiang Liu's patch set
> > to fix the compile error on ARM64, I'd rather do that, but It's
> > better to let Jiang Liu's patch goes in, and then this one, that's
> > why I prepared a single patch for the struct. (I mentioned it
> > in the cover letter)
> >
> >>> Second, why is the whole struct pci_controller not surrounded
> >>> by #ifdef CONFIG_ACPI as you are implying that this is needed
> >>> only for ACPI?
> >
> >
> > I hope it can be reused, since the NUMA node and segment (domain)
> > is both needed for DT and ACPI, if it's not the case foe now, I
> > can surrounded them all by #ifdef CONFIG_ACPI.
> we can make use of this structure to hold pci to numa node
> mapping(pcibus_to_node).
> can you please pull node member out of  CONFIG_ACPI ifdef.
> or you can put only acpi_device under ifdef.

That struct disappeared in the latest series:

https://lkml.org/lkml/2015/6/8/443

we have to have a common way to handle the NUMA info in DT and ACPI
so we should still find a solution that can be shared between the two,
it is yet another thing to take into account for PCI ACPI on arm64.

Thanks,
Lorenzo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/