linux-kernel - Re: Removal of bus->msi assignment breaks MSI with stacked domains

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Date:	Fri, 21 Nov 2014 19:57:01 +0800
From:	Yijing Wang <wangyijing0307@...il.com>
To:	Marc Zyngier <marc.zyngier@....com>,
	Yijing Wang <wangyijing@...wei.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Will Deacon <Will.Deacon@....com>,
	Catalin Marinas <Catalin.Marinas@....com>
Subject: Re: Removal of bus->msi assignment breaks MSI with stacked domains


在 2014/11/21 18:11, Marc Zyngier 写道:
> On 21/11/14 01:22, Yijing Wang wrote:
>> On 2014/11/21 0:31, Marc Zyngier wrote:
>>> Bjorn, Yijing,
>>>
>>> I've just realized that patch c167caf8d174 (PCI/MSI: Remove useless
>>> bus->msi assignment) completely breaks MSI on arm64 when using the new
>>> MSI stacked domain:
>> Sorry, this is my first part to refactor MSI related code, now
>> how to get pci msi_controller depends arch functions(pcibios_msi_controller() or
>> arch_setup_msi_irq()), we are working on generic pci_host_bridge, after that,
>> we could eventually eliminate MSI arch functions and find pci dev 's msi controller
>> by pci_host_bridge->get_msi_controller().
>>
>> Marc, could you tell me what pci host driver in your test platform ?
> I'm using pci-host-generic (with a couple of patches to help it fit the
> new "generic pci" infrastructure).
>
> This lives at:
> git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git
> irq/arm64-pci

Thanks, I would have a look at it.

>
> Thanks,
>
> 	M.

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