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

[Jan Kiszka]

On 2012-03-22 00:17, Jan Kiszka wrote:
> 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(-)
> 

Anyone any comments? I think this series could open the door for
kernel_irqchip=on as default in QEMU 1.1.

Jan

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