Re: [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:

    https://lore.kernel.org/r/20200821002424.119492231@linutronix.de (local)

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 [off-list ref]