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

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Message-ID: <527149E3.9040607@redhat.com>
Date:	Wed, 30 Oct 2013 19:03:15 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Alex Williamson <alex.williamson@...hat.com>
CC:	kvm@...r.kernel.org, gleb@...hat.com, aik@...abs.ru,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/3] KVM noncoherent DMA registration and VFIO pseudo
 device

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
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