Messages in this thread | | | Subject | Re: [PATCH v6.1] iommu/dma: Add support for mapping MSIs | From | Marc Zyngier <> | Date | Fri, 9 Sep 2016 15:42:22 +0100 |
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Hi Robin,
On 07/09/16 10:55, Robin Murphy wrote: > When an MSI doorbell is located downstream of an IOMMU, attaching > devices to a DMA ops domain and switching on translation leads to a rude > shock when their attempt to write to the physical address returned by > the irqchip driver faults (or worse, writes into some already-mapped > buffer) and no interrupt is forthcoming. > > Address this by adding a hook for relevant irqchip drivers to call from > their compose_msi_msg() callback, to swizzle the physical address with > an appropriatly-mapped IOVA for any device attached to one of our DMA > ops domains. > > CC: Thomas Gleixner <tglx@linutronix.de> > CC: Jason Cooper <jason@lakedaemon.net> > CC: Marc Zyngier <marc.zyngier@arm.com> > CC: linux-kernel@vger.kernel.org > Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Thanks for the quick respin.
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
M. -- Jazz is not dead. It just smells funny...
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