linux-kernel - Re: [Patch V4 00/42] use irqdomain to dynamically allocate IRQ for IOAPIC

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Date:	Sun, 22 Jun 2014 22:39:46 +0800
From:	Feng Tang <feng.tang@...el.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Grant Likely <grant.likely@...aro.org>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Luck, Tony" <tony.luck@...el.com>, Joerg Roedel <joro@...tes.org>,
	"Gortmaker, Paul (Wind River)" <paul.gortmaker@...driver.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	alek.du@...el.com, mark.gross@...el.com
Subject: Re: [Patch V4 00/42] use irqdomain to dynamically allocate IRQ for
 IOAPIC

Hi,

On Sun, Jun 22, 2014 at 04:42:27PM +0800, Ingo Molnar wrote:
> 
> JFYI, with these patches applied x86 allyes32config fails with:
> 
>   arch/x86/platform/intel-mid/device_libs/platform_wdt.c:45:3: error: implicit declaration of function ‘io_apic_set_pci_routing’ 

In some intel-mid platforms (Medfield/Merrifield etc), the IOAPIC
may have more than 80 pins, and some devices like a i2c based touch
screen has its interrupt line directly connected to IOAPIC (this
platform_wdt.c here should be the same case).

Since these devices are not PCI device or ACPI device, they can't
use the general PCI/ACPI xxx_enable_dev APIs which implicitly set
up the ioapic entry, but use this "io_apic_set_pci_routing"
directly.

Thanks,
Feng

> 
> Thanks,
> 
> 	Ingo
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