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

[Julien Grall]

Hi Thomas,

On 4/18/19 8:28 PM, Thomas Gleixner wrote:
> 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.

Sorry for that. I will rework all the commit messages and resend the series.

Cheers,

--
Julien Grall