On 11/24/2014 10:26 PM, Nikolay Nikolaev wrote: > The IOEVENTFD KVM capability is a prerequisite for vhost support, > and is also used to implement improved interrupt handling in VFIO drivers. Hi Nikolay As far as I am aware, irqfd currently is used in vfio context, not ioeventfd, although they both are implemented in eventfd.c. Could you elaborate? > > This series enables the ioeventfd KVM capability on ARM. > > The implementation routes MMIO access in the IO abort handler to the KVM IO bus. > If there is already a registered ioeventfd handler for this address, the file > descriptor will be triggered. > > We extended the KVM IO bus API to expose the VCPU struct pointer. Now the VGIC > MMIO access is done through this API. For this to operate the VGIC registers a > kvm_io_device which reprresents the whole MMIO region. typo & the whole dist MMIO region? I think the transformation makes sense and does not bring upheavals in the vgic code which is good. Best Regards Eric > > The patches are implemented on top of the latest Andre's vGICv3 work from here: > http://www.linux-arm.org/git?p=linux-ap.git;a=shortlog;h=refs/heads/kvm-gicv3/v4 > > The code was tested on Dual Cortex-A15 Exynos5250 (ARM Chromebook). > > --- > > Nikolay Nikolaev (5): > KVM: redesing kvm_io_bus_ API to pass VCPU structure to the callbacks. > ARM: on IO mem abort - route the call to KVM MMIO bus > KVM: ARM VGIC add kvm_io_bus_ frontend > ARM: enable linking against eventfd and irqchip > ARM: enable KVM_CAP_IOEVENTFD > > > arch/arm/kvm/Kconfig | 1 + > arch/arm/kvm/Makefile | 2 + > arch/arm/kvm/arm.c | 3 ++ > arch/arm/kvm/mmio.c | 32 ++++++++++++++++ > arch/ia64/kvm/kvm-ia64.c | 4 +- > arch/powerpc/kvm/powerpc.c | 4 +- > arch/s390/kvm/diag.c | 2 + > arch/x86/kvm/vmx.c | 2 + > arch/x86/kvm/x86.c | 11 +++--- > include/kvm/arm_vgic.h | 3 +- > include/linux/kvm_host.h | 10 +++-- > virt/kvm/arm/vgic.c | 88 +++++++++++++++++++++++++++++++++++++------- > virt/kvm/coalesced_mmio.c | 5 ++- > virt/kvm/eventfd.c | 4 +- > virt/kvm/iodev.h | 23 ++++++++---- > virt/kvm/kvm_main.c | 32 ++++++++-------- > 16 files changed, 163 insertions(+), 63 deletions(-) > > -- > Signature > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
