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Re: [Qemu-ppc] [PATCH qemu 0/3] spapr/iommu: Enable in-kernel TCE accele


From: Paolo Bonzini
Subject: Re: [Qemu-ppc] [PATCH qemu 0/3] spapr/iommu: Enable in-kernel TCE acceleration via VFIO KVM device
Date: Tue, 2 Jan 2018 18:51:51 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0

On 02/01/2018 06:28, Alexey Kardashevskiy wrote:
> This is my current queue of the in-kernel TCE acceleration
> enablement.
> 
> Changes since 
> https://lists.gnu.org/archive/html/qemu-devel/2017-12/msg01918.html :
> * 3 patches instead of one, one per maintainership area;
> * added memory_region_iommu_get_attr();
> * removed set_attr() as there is no use for it now;
> * folded the chunk in vfio_listener_region_add() under
> VFIO_SPAPR_TCE_v2_IOMMU branch as the acceleration is only
> enabled when DMA memory is preregistered and this is only supported
> by the v2 IOMMU.
> 
> This is based on sha1
> ad59cde C├ędric Le Goater "target/ppc: more use of the PPC_*() macros".
> 
> Please comment. Thanks.
> 
> 
> 
> Alexey Kardashevskiy (3):
>   memory/iommu: Add get_attr()
>   vfio/spapr: Use iommu memory region's get_attr()
>   spapr/iommu: Enable in-kernel TCE acceleration via VFIO KVM device
> 
>  include/exec/memory.h | 22 ++++++++++++++++++++++
>  target/ppc/kvm_ppc.h  |  6 ++++++
>  hw/ppc/spapr_iommu.c  | 19 +++++++++++++++++++
>  hw/vfio/common.c      | 26 ++++++++++++++++++++++++++
>  memory.c              | 13 +++++++++++++
>  target/ppc/kvm.c      |  7 ++++++-
>  hw/vfio/trace-events  |  1 +
>  7 files changed, 93 insertions(+), 1 deletion(-)
> 

Alex, if this is okay for you, please pick it up yourself.

Thanks,

Paolo



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