Message-ID: <546F288D.2040705@gmail.com>
Date: Fri, 21 Nov 2014 19:57:01 +0800
From: Yijing Wang <wangyijing0307@gmail.com>
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To: Marc Zyngier <marc.zyngier@arm.com>, Yijing Wang <wangyijing@huawei.com>,
        Bjorn Helgaas <bhelgaas@google.com>
CC: Thomas Gleixner <tglx@linutronix.de>,
        "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Jiang Liu <jiang.liu@linux.intel.com>,
        Will Deacon <Will.Deacon@arm.com>,
        Catalin Marinas <Catalin.Marinas@arm.com>
Subject: Re: Removal of bus->msi assignment breaks MSI with stacked domains
References: <546E1771.4030201@arm.com> <546E93DC.8010902@huawei.com> <546F0FB6.3050404@arm.com>
In-Reply-To: <546F0FB6.3050404@arm.com>
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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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