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 <t...@linutronix.de>
> CC: Jason Cooper <ja...@lakedaemon.net>
> CC: Marc Zyngier <marc.zyng...@arm.com>
> CC: linux-ker...@vger.kernel.org
> Signed-off-by: Robin Murphy <robin.mur...@arm.com>
Thanks for the quick respin.
Acked-by: Marc Zyngier <marc.zyng...@arm.com>
M.
--
Jazz is not dead. It just smells funny...
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