[PATCH v4 0/2] Remove the VFIO_IOMMU_NOTIFY_DMA_UNMAP notifier

From: Jason Gunthorpe <jgg@nvidia.com>
To: Alexander Gordeev <agordeev@linux.ibm.com>,
	David Airlie <airlied@linux.ie>,
	Alex Williamson <alex.williamson@redhat.com>,
	Christian Borntraeger <borntraeger@linux.ibm.com>,
	Cornelia Huck <cohuck@redhat.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	dri-devel@lists.freedesktop.org,
	Harald Freudenberger <freude@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Heiko Carstens <hca@linux.ibm.com>,
	intel-gfx@lists.freedesktop.org,
	intel-gvt-dev@lists.freedesktop.org,
	Jani Nikula <jani.nikula@linux.intel.com>,
	Jason Herne <jjherne@linux.ibm.com>,
	Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
	kvm@vger.kernel.org, linux-s390@vger.kernel.org,
	Matthew Rosato <mjrosato@linux.ibm.com>,
	Peter Oberparleiter <oberpar@linux.ibm.com>,
	Halil Pasic <pasic@linux.ibm.com>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>,
	Sven Schnelle <svens@linux.ibm.com>,
	Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
	Vineeth Vijayan <vneethv@linux.ibm.com>,
	Zhi Wang <zhi.a.wang@intel.com>
Cc: Tony Krowiak <akrowiak@linux.ibm.com>,
	Eric Farman <farman@linux.ibm.com>,
	Christoph Hellwig <hch@lst.de>, Kevin Tian <kevin.tian@intel.com>,
	Zhenyu Wang <zhenyuw@linux.intel.com>
Subject: [PATCH v4 0/2] Remove the VFIO_IOMMU_NOTIFY_DMA_UNMAP notifier
Date: Tue, 19 Jul 2022 21:02:47 -0300	[thread overview]
Message-ID: <0-v4-681e038e30fd+78-vfio_unmap_notif_jgg@nvidia.com> (raw)

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

v4:
 - Rebase over the CCW series
v3: https://lore.kernel.org/r/0-v3-7593f297c43f+56ce-vfio_unmap_notif_jgg@nvidia.com
 - 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       |  39 ++--------
 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, 132 insertions(+), 282 deletions(-)

base-commit: 2a8ed7ef00b939fbcc98b948f780bd03bafed227
-- 
2.37.1