From mboxrd@z Thu Jan 1 00:00:00 1970 From: tglx@linutronix.de (Thomas Gleixner) Date: Thu, 13 Nov 2014 22:11:26 +0100 (CET) Subject: [Patch V1 0/6] Refine generic/PCI MSI irqodmian interfaces In-Reply-To: <54651BE2.9080008@arm.com> References: <1415879029-20098-1-git-send-email-jiang.liu@linux.intel.com> <54651BE2.9080008@arm.com> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, 13 Nov 2014, Marc Zyngier wrote: > With the new stacked irq domains, it becomes pretty tempting > to allocate an MSI domain per PCI bus, which would remove > the requirement of either relying on arch-specific code, or > a default PCI MSI domain. Right. That's what I roughly had in mind. And that would solve the multi-iommu issue on x86 nicely as well. We establish the association at the time where the bus gets populated. So the whole lookup magic simply goes away. Thanks, tglx