[Qemu-devel] [RFC][PATCH 0/2] uq/master: Basic MSI support for in-kernel irqchip mode

[Jan Kiszka <jan.kiszka@web.de>]

Some half a year ago when I posted my first attempt to refactor MSI
for KVM support, we came to the conclusion that it might suffice to do
transparent dynamic routing for user-space injected MSI messages. These
two patches now implement such an approach for upstream.

As QEMU does not yet include irqfd support (for vhost) or pci device
assignment, this is already enough to enable MSI over the in-kernel
irqchip. Still, this is only RFC as it is just lightly tested and should
primarily collect feedback regarding the direction. If it's fine, I'd
like to base further qemu-kvm refactorings and upstream preparations on
top of such a series.

Also, I'd like to reanimate my KVM patch to provide direct MSI injection
in future kernels so that we do not need to take this long path here
forever.

Jan Kiszka (2):
  kvm: Introduce basic MSI support in-kernel irqchips
  KVM: x86: Wire up MSI support for in-kernel irqchip

 hw/apic.c     |    3 +
 hw/kvm/apic.c |   33 ++++++++++-
 hw/pc.c       |    5 --
 kvm-all.c     |  171 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 kvm.h         |    1 +
 5 files changed, 205 insertions(+), 8 deletions(-)

-- 
1.7.3.4