Re: [PATCH 0/4] Enable MSI support for KVM VT-d

["Yang, Sheng" <sheng.yang@intel.com>]

On Monday 20 October 2008 12:09:20 Zhang, Xiantao wrote:
> Avi Kivity wrote:
> > Sheng Yang wrote:
> >> Hi, Avi
> >>
> >> This patchset enable MSI support for KVM VT-d.
> >>
> >> And here are only kernel space ones. The third patch would go to
> >> also goto x86 upstream.
> >>
> >> The userspace code would looks like this:
> >>
> >> assigned_irq_data.guest_msi_addr = *(uint32_t *)(d->msi_cap + 4);
> >> assigned_irq_data.guest_msi_data = *(uint16_t *)(d->msi_cap + 8);
> >> assigned_irq_data.flags |= KVM_DEV_IRQ_ASSIGN_ENABLE_MSI;
> >> r = kvm_assign_irq(kvm_context, &assigned_irq_data);
> >>
> >> I've test the patchset with some userspace hack, it works well.
> >
> > Can you resend this patch with all the updates, as well as the
> > userspace changes?
>
> Maybe Sheng need to make it work on kvm/ia64, and at least the changes
> can't break ia64 side. Xiantao
>
Yes, I would ensure that won't break ia64. I would repost the patchset soon. 

But Avi, for the userspace, the Amit's patch still not checked in, so I 
haven't written a complete version because of lacking code base. I only got a 
experiment patch by hand, expose MSI cap to guest and enable MSI when guest 
wrote MSI enable bit. Well, I prefer to give you a complete version after 
Amit's patch is there. (I will conclude the change of userspace in the first 
mail).

--
regards
Yang, Sheng