Re: [PATCH v2 0/3] KVM noncoherent DMA registration and VFIO pseudo device

Paolo Bonzini
2013-10-30T18:03:30Z

Il 30/10/2013 18:02, Alex Williamson ha scritto:
> v2:
> - Drop KVM device changes
> - Add kfree(dev) in destroy function
> - Add atomic_set(,0) in kvm_arch init
>
> As described in v1 and discussion, this adds a VFIO pseudo device to
> KVM through which userspace can register VFIO groups. The initial use
> of this interface is to enable emulation of coherency instructions on
> x86 when a VFIO group is attached. Future patches will allow KVM to
> query the coherency state of the IOMMU domain used by the group to
> avoid unnecessarily enabling this emulation. Thanks,
>
> Alex
>
> ---
>
> Alex Williamson (3):
> kvm: Add VFIO device
> kvm/x86: Convert iommu_flags to iommu_noncoherent
> kvm: Create non-coherent DMA registeration
>
>
> Documentation/virtual/kvm/devices/vfio.txt | 22 ++
> arch/ia64/include/asm/kvm_host.h | 2
> arch/x86/include/asm/kvm_host.h | 4
> arch/x86/kvm/Kconfig | 1
> arch/x86/kvm/Makefile | 2
> arch/x86/kvm/vmx.c | 3
> arch/x86/kvm/x86.c | 22 ++
> include/linux/kvm_host.h | 23 ++
> include/uapi/linux/kvm.h | 4
> virt/kvm/Kconfig | 3
> virt/kvm/iommu.c | 22 +-
> virt/kvm/kvm_main.c | 5 +
> virt/kvm/vfio.c | 264 ++++++++++++++++++++++++++++
> 13 files changed, 359 insertions(+), 18 deletions(-)
> create mode 100644 Documentation/virtual/kvm/devices/vfio.txt
> create mode 100644 virt/kvm/vfio.c
>

Applied to kvm/queue, thanks.

Paolo