Messages in this thread | | | From | Thomas Gleixner <> | Subject | RE: [patch 21/32] NTB/msi: Convert to msi_on_each_desc() | Date | Sun, 12 Dec 2021 21:55:32 +0100 |
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Kevin,
On Sun, Dec 12 2021 at 01:56, Kevin Tian wrote: >> From: Thomas Gleixner <tglx@linutronix.de> >> All I can find is drivers/iommu/virtio-iommu.c but I can't find anything >> vIR related there. > > Well, virtio-iommu is a para-virtualized vIOMMU implementations. > > In reality there are also fully emulated vIOMMU implementations (e.g. > Qemu fully emulates Intel/AMD/ARM IOMMUs). In those configurations > the IR logic in existing iommu drivers just apply: > > drivers/iommu/intel/irq_remapping.c > drivers/iommu/amd/iommu.c
thanks for the explanation. So that's a full IOMMU emulation. I was more expecting a paravirtualized lightweight one.
Thanks,
tglx
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