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.
