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

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Message-ID: <546F0FB6.3050404@arm.com>
Date:	Fri, 21 Nov 2014 10:11:02 +0000
From:	Marc Zyngier <marc.zyngier@....com>
To:	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

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,

	M.
-- 
Jazz is not dead. It just smells funny...
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