This series illustrates an alternative approach to Eric Auger's direct EOI setup patches [1] in terms of the KVM VGIC support. The idea is to maintain existing semantics for the VGIC for mapped level-triggered IRQs and think support for the timer into it. Patch 1 is stolen from Eric's series and is necessary for these patches to compile as well. Patch 2 includes the core support for mapped level-triggered interrupts. Patch 3 moves some code around for patch 4. Patch 4 implements an optimization for the timer. The last two patches could be deferred until the timer optimization series. This series is untested (hence the RFC tag) and I'm looking for feedback from the VGIC guys (you know who you are) on the approach and whether we know up-front that this breaks for some reason. I'll be happy to test and debug further if we agree on the overall approach. Based on v4.13-rc7. Thanks, -Christoffer [1]: https://lists.cs.columbia.edu/pipermail/kvmarm/2017-June/026072.html Christoffer Dall (3): KVM: arm/arm64: vgic: Support level-triggered mapped interrupts KVM: arm/arm64: Rearrange kvm_vgic_[un]map_phys code in vgic.c KVM: arm/arm64: Provide a vgic interrupt line level sample function Eric Auger (1): KVM: arm/arm64: vgic: restructure kvm_vgic_(un)map_phys_irq include/kvm/arm_vgic.h | 19 +++++++++++-- virt/kvm/arm/arch_timer.c | 38 ++++++++++--------------- virt/kvm/arm/vgic/vgic-v2.c | 29 +++++++++++++++++++ virt/kvm/arm/vgic/vgic-v3.c | 29 +++++++++++++++++++ virt/kvm/arm/vgic/vgic.c | 68 +++++++++++++++++++++++++++++++++++++-------- virt/kvm/arm/vgic/vgic.h | 7 +++++ 6 files changed, 153 insertions(+), 37 deletions(-) -- 2.9.0
