Robin Murphy 44bb7e243b
iommu/dma: Add support for mapping MSIs ...
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.
Acked-by: Thomas Gleixner <tglx@linutronix.de >
Acked-by: Marc Zyngier <marc.zyngier@arm.com >
Signed-off-by: Robin Murphy <robin.murphy@arm.com >
Signed-off-by: Will Deacon <will.deacon@arm.com >
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Robin Murphy
44bb7e243b