On 10/01/15 00:36, Stephen Hemminger wrote: > On Wed, 30 Sep 2015 23:09:33 +0300 > Vlad Zolotarov <vladz at cloudius-systems.com> wrote: > >> >> 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. >> > I have a generic MSI and MSI-X driver (posted earlier on this list). > About to post to upstream kernel.
Great! It would save me a few working days... ;) Thanks, Stephen!
