Re: [iommufd PATCH v2 0/2] Make mdev driver dma_unmap callback tolerant to unmaps come before device open

[Yi Liu <yi.l.liu@intel.com>]

On 2022/11/29 17:35, Yi Liu wrote:
> Jason's "Connect VFIO to IOMMUFD" introduces vfio iommufd compat mode. Under
> this mode, vfio_iommufd_bind() creates an access which has an unmap callback,
> which can be called immediately. This means mdev drivers may receive unmap
> requests before the mdev is opened. For now, there are only three drivers
> (gvt, vfio-ap and vfio-ccw) providing dma_unmap(). vfio-ccw is fine with
> such requests. While gvt-g and vfio-ap may have potential problem with such
> requests due to internal implementation. This series tries to enhance the two
> drivers.
> 
> This series is based on Jason's below branch.
> 
> https://github.com/jgunthorpe/linux/tree/iommufd
> 
> (commit: 41973418f6c8c241ed5647d1408d5b917f24dfd8)

it's resent as below link. Please ignore this series.

https://lore.kernel.org/kvm/20221129105831.466954-1-yi.l.liu@intel.com/

> Change:
> v2:
>   - Refine the cover letter and commit message of patch 0001 (Kevin)
>   - Rename patch 0001 to better fit the commit message
>   - Add r-b from Zhi for patch 0001
>   - tweak iova range test to assume page-aligned for patch 0002 (Jason)
>   - Remove break so all queues within range are removed for patch 0002 (Kevin)
> 
> v1: https://lore.kernel.org/kvm/20221123134832.429589-1-yi.l.liu@intel.com/
> 
> Cc: Tony Krowiak <akrowiak@linux.ibm.com>
> Cc: Halil Pasic <pasic@linux.ibm.com>
> Cc: Jason Herne <jjherne@linux.ibm.com>
> Cc: linux-s390@vger.kernel.org
> Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
> Cc: Zhi Wang <zhi.a.wang@intel.com>
> Cc: Kevin Tian <kevin.tian@intel.com>
> Cc: intel-gvt-dev@lists.freedesktop.org
> 
> Regards,
> 	Yi Liu
> 
> Matthew Rosato (1):
>    vfio/ap: validate iova during dma_unmap and trigger irq disable
> 
> Yi Liu (1):
>    i915/gvt: Move gvt mapping cache initialization to vGPU creation
> 
>   drivers/gpu/drm/i915/gvt/gvt.h    |  2 ++
>   drivers/gpu/drm/i915/gvt/kvmgt.c  |  7 ++-----
>   drivers/gpu/drm/i915/gvt/vgpu.c   |  2 ++
>   drivers/s390/crypto/vfio_ap_ops.c | 18 +++++++++++++++++-
>   4 files changed, 23 insertions(+), 6 deletions(-)
> 

-- 
Regards,
Yi Liu