Re: Virtio-IOMMU interrupt remapping design

Jason Gunthorpe
2025-06-17T23:03:42Z

On Tue, Jun 17, 2025 at 04:01:53PM -0400, Michael S. Tsirkin wrote:
> > On x86 you also need to use remapping to exceed the max CPU count that
> > can be encoded in the MSI, no iommu required to need this.
>
> More of an x86 quirk though, isn't it?

Yes, but so is bundling IOMMU and remapping HW together <shrug>

GIC fully integrates it into the interrupt controller architecture.

Jason