On 09/30/15 22:39, Michael S. Tsirkin wrote: > On Wed, Sep 30, 2015 at 10:06:52PM +0300, Vlad Zolotarov wrote: >>>> How would iommu >>>> virtualization change anything? >>> Kernel can use an iommu to limit device access to memory of >>> the controlling application. >> Ok, this is obvious but what it has to do with enabling using MSI/MSI-X >> interrupts support in uio_pci_generic? kernel may continue to limit the >> above access with this support as well. > It could maybe. So if you write a patch to allow MSI by at the same time > creating an isolated IOMMU group and blocking DMA from device in > question anywhere, that sounds reasonable.
No, I'm only planning to add MSI and MSI-X interrupts support for uio_pci_generic device. The rest mentioned above should naturally be a matter of a different patch and writing it is orthogonal to the patch I'm working on as has been extensively discussed in this thread. >