Re: [PATCH 1/7] genirq/msi: Add a new field in msi_desc to store an IOMMU cookie

[Thomas Gleixner]

On Thu, 18 Apr 2019, Julien Grall wrote:

> When an MSI doorbell is located downstream of an IOMMU, it is required
> to swizzle the physical address with an appropriately-mapped IOVA for any
> device attached to one of our DMA ops domain.
> 
> At the moment, the allocation of the mapping may be done when composing
> the message. However, the composing may be done in non-preemtible
> context while the allocation requires to be called from preemptible
> context.
> 
> A follow-up patch will split the current logic in two functions
> requiring to keep an IOMMU cookie per MSI.
> 
> This patch introduces a new field in msi_desc to store an IOMMU cookie
> when CONFIG_IOMMU_DMA is selected.

# git grep 'This patch' Documentation/process/

Applied to the whole series.

Thanks

	tglx