Subject: [PATCH v6.1] iommu/dma: Add support for mapping MSIs

From: [email-masked] (Marc Zyngier)
Date: Fri, 9 Sep 2016 15:42:22 +0100

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 <[email-masked]>
> CC: Jason Cooper <[email-masked]>
> CC: Marc Zyngier <[email-masked]>
> CC: linux-kernel at vger.kernel.org
> Signed-off-by: Robin Murphy <[email-masked]>

Thanks for the quick respin.

Acked-by: Marc Zyngier <[email-masked]>

	M.
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