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SubjectRe: [patch V2 00/46] x86, PCI, XEN, genirq ...: Prepare for device MSI
On Wed, Aug 26, 2020 at 01:16:28PM +0200, Thomas Gleixner wrote:
> This is the second version of providing a base to support device MSI (non
> PCI based) and on top of that support for IMS (Interrupt Message Storm)
> based devices in a halfways architecture independent way.
> The first version can be found here:
> It's still a mixed bag of bug fixes, cleanups and general improvements
> which are worthwhile independent of device MSI.
> There are quite a bunch of issues to solve:
> - X86 does not use the device::msi_domain pointer for historical reasons
> and due to XEN, which makes it impossible to create an architecture
> agnostic device MSI infrastructure.
> - X86 has it's own msi_alloc_info data type which is pointlessly
> different from the generic version and does not allow to share code.
> - The logic of composing MSI messages in an hierarchy is busted at the
> core level and of course some (x86) drivers depend on that.
> - A few minor shortcomings as usual
> This series addresses that in several steps:

For all IOMMU changes:

Acked-by: Joerg Roedel <>

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