[PATCH v3 0/2] Remove the VFIO_IOMMU_NOTIFY_DMA_UNMAP notifier

Jason Gunthorpe
2022-07-05T00:59:09Z

This is the last notifier toward the drivers, replace it with a simple op
callback in the vfio_device_ops.

v3:
- Remove 'nb' doc string from ccw
- Rebase on extern removal patch
- Check that register_device/unregister_device are either both defined or
not
- Remove check of dma_unmap during vfio_register_iommu_driver() as it
would break the drivers that don't use pin_pages
- Don't change VFIO_IOMMU_NOTIFY_DMA_UNMAP to an enum since we are not
keeping it anyhow
v2: https://lore.kernel.org/r/0-v2-80aa110d03ce+24b-vfio_unmap_notif_jgg@nvidia.com
- Declare and initialize variables in intel_vgpu_dma_unmap()
- Remove 'vendor' when touching comments
- Remove kdoc for vfio dma_unmap notifier
- Add WARN_ON to vfio_register_emulated_iommu_dev() since dma_unmap is
mandatory
- Move dma_unmap call loop to vfio_notify_dma_unmap()
- Document why the double mutex is being used and why the mutex lock is
dropped when calling dma_unmap
v1: https://lore.kernel.org/r/0-v1-896844109f36+a-vfio_unmap_notif_jgg@nvidia.com

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

Jason Gunthorpe (2):
vfio: Replace the DMA unmapping notifier with a callback
vfio: Replace the iommu notifier with a device list

drivers/gpu/drm/i915/gvt/gvt.h | 1 -
drivers/gpu/drm/i915/gvt/kvmgt.c | 75 +++++-------------
drivers/s390/cio/vfio_ccw_ops.c | 41 +++-------
drivers/s390/cio/vfio_ccw_private.h | 2 -
drivers/s390/crypto/vfio_ap_ops.c | 53 ++-----------
drivers/s390/crypto/vfio_ap_private.h | 3 -
drivers/vfio/vfio.c | 108 ++++++--------------------
drivers/vfio/vfio.h | 9 +--
drivers/vfio/vfio_iommu_type1.c | 103 +++++++++++++++---------
include/linux/vfio.h | 21 +----
10 files changed, 134 insertions(+), 282 deletions(-)

base-commit: d1877e639bc6bf1c3131eda3f9ede73f8da96c22
--
2.37.0