On Tue, 14 Oct 2008, Han, Weidong wrote:
> Zwane Mwaikambo wrote:
> > Hi,
> > I've been trying to get a Linux guest working with PCI
> passthrough
> > of an ethernet card using the vtd branches. The device detection
> > works and the guest reports a link, however as soon as i try and ping
> > the guest it receives an NMI (i'm guessing this is PCI DMA related).
> > Interrupt delivery to the guest looks fine (count increases at a low
> > rate) and isn't shared with anything else on the host.
> >
> > Thanks for any hints.
> >
> > Zwane
>
> What do you mean "vtd branches"? Is it the vtd branch of Amit's tree?
>
> VT-d patches are in kvm.git, as long as you apply amit's userspace patch
> (you can find it on mailing list), you should can assign device to
> guest. Make sure you enable VT-d in BIOS and set CONFIG_DMAR in config,
> and remove device driver before you assign device. NIC and USB
> controller assignment works fine for me.
I'm using the following repositories without any additional patches;
git://git.kernel.org/pub/scm/linux/kernel/git/amit/kvm.git vtd
git://git.kernel.org/pub/scm/linux/kernel/git/amit/kvm-userspace.git vtd
The host kernel only has the e100 network driver enabled, the guest kernel
only has the e1000 network driver enabled. I have enabled VT-d in the BIOS
and enabled CONFIG_DMAR in the host kernel config. I'm really beginning to
suspect the BIOS unfortunately :(
Thanks,
Zwane
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