On Tue, Dec 23, 2008 at 04:12:49PM +0800, Sheng Yang wrote: > Hi Avi > > This patchset would enable MSI-X support. > > The main change is a new kind of fake device - intercepted MMIO device is > added for supporting to intercept one page contained MSI-X entries table. > > I also consider of doing this intercept in userspace. But I think it's would > be more complex to push it in userspace, for we also have to prevent KVM from > creating page table for the page.
Unmapping the page in userspace (with munmap) from the PCI MMIO map will disallow KVM from creating pagetable for the page. > And in the future, we would add hook > function in the read/write operation to enabling mask bit for each MSI-X > entry, may be with pending bits. Can you explain it in more detail? Can't do it from userspace? Are there performance considerations to access in this page? > So I decided to put it in the kernel. > > Another thing is I am not very confident about modify the position of handling > guest memory and MMIO in emulate read/write function. Is it would cause any > side affect? Should not be necessary if done in userspace. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
