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From: Jason Gunthorpe <jgg@ziepe.ca>
To: Christoph Hellwig <hch@lst.de>
Cc: Alex Williamson <alex.williamson@redhat.com>,
	Diana Craciun <diana.craciun@oss.nxp.com>,
	Cornelia Huck <cohuck@redhat.com>,
	Kirti Wankhede <kwankhede@nvidia.com>,
	Eric Auger <eric.auger@redhat.com>,
	kvm@vger.kernel.org
Subject: Re: [PATCH 07/14] vfio: simplify iommu group allocation for mediated devices
Date: Wed, 25 Aug 2021 19:31:17 -0300	[thread overview]
Message-ID: <20210825223117.GB1200268@ziepe.ca> (raw)
In-Reply-To: <20210825161916.50393-8-hch@lst.de>

On Wed, Aug 25, 2021 at 06:19:08PM +0200, Christoph Hellwig wrote:
> Reuse the logic in vfio_noiommu_group_alloc to allocate a fake
> single-device iommu group for mediated devices.  A new function is
> exposed to create vfio_device for this emulated case and the noiommu
> boolean field in struct vfio_group is replaced with a set of flags so
> that devices with an emulated IOMMU can be distinguished from those
> with no IOMMU at all.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/vfio/mdev/mdev_driver.c | 46 ++--------------------
>  drivers/vfio/mdev/vfio_mdev.c   |  2 +-
>  drivers/vfio/vfio.c             | 70 +++++++++++++++++++++------------
>  include/linux/vfio.h            |  1 +
>  samples/vfio-mdev/mbochs.c      |  2 +-
>  samples/vfio-mdev/mdpy.c        |  2 +-
>  samples/vfio-mdev/mtty.c        |  2 +-
>  7 files changed, 53 insertions(+), 72 deletions(-)

This conflicts with the AP mdev conversion, it will need to change to
vfio_register_emulated_iommu_dev() like the samples did. Alex, I suggest
you take this patch after the AP mdev patch and add the one line fix up.

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

Jason

  reply	other threads:[~2021-08-25 22:31 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25 16:19 cleanup vfio iommu_group creation v3 Christoph Hellwig
2021-08-25 16:19 ` [PATCH 01/14] vfio: Move vfio_iommu_group_get() to vfio_register_group_dev() Christoph Hellwig
2021-08-26  1:40   ` Tian, Kevin
2021-08-26  8:21     ` Christoph Hellwig
2021-08-25 16:19 ` [PATCH 02/14] vfio: factor out a vfio_iommu_driver_allowed helper Christoph Hellwig
2021-08-26  1:49   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 03/14] vfio: remove the iommudata check in vfio_noiommu_attach_group Christoph Hellwig
2021-08-26  1:52   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 04/14] vfio: factor out a vfio_group_find_or_alloc helper Christoph Hellwig
2021-08-25 22:26   ` Jason Gunthorpe
2021-08-26  2:21   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 05/14] vfio: refactor noiommu group creation Christoph Hellwig
2021-08-26  2:20   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 06/14] vfio: remove the iommudata hack for noiommu groups Christoph Hellwig
2021-08-26  2:27   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 07/14] vfio: simplify iommu group allocation for mediated devices Christoph Hellwig
2021-08-25 22:31   ` Jason Gunthorpe [this message]
2021-08-26  3:10   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 08/14] vfio: remove unused method from vfio_iommu_driver_ops Christoph Hellwig
2021-08-26  3:11   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 09/14] vfio: move the vfio_iommu_driver_ops interface out of <linux/vfio.h> Christoph Hellwig
2021-08-26  3:14   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 10/14] vfio: remove the unused mdev iommu hook Christoph Hellwig
2021-08-25 22:32   ` Jason Gunthorpe
2021-08-26  3:49   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 11/14] vfio: clean up the check for mediated device in vfio_iommu_type1 Christoph Hellwig
2021-08-26  3:51   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 12/14] vfio/spapr_tce: reject mediated devices Christoph Hellwig
2021-08-26  3:52   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 13/14] vfio/iommu_type1: remove the "external" domain Christoph Hellwig
2021-08-26  4:31   ` Tian, Kevin
2021-08-25 16:19 ` [PATCH 14/14] vfio/iommu_type1: remove IS_IOMMU_CAP_DOMAIN_IN_CONTAINER Christoph Hellwig
2021-08-26  4:32   ` Tian, Kevin
  -- strict thread matches above, loose matches on Subject: below --
2021-09-13  7:15 cleanup vfio iommu_group creation v5 Christoph Hellwig
2021-09-13  7:15 ` [PATCH 07/14] vfio: simplify iommu group allocation for mediated devices Christoph Hellwig
2021-09-14  2:23   ` Tian, Kevin
2021-08-29 19:23 kernel test robot
2021-08-29 19:23 ` kernel test robot
2021-08-26 13:34 cleanup vfio iommu_group creation v4 Christoph Hellwig
2021-08-26 13:34 ` [PATCH 07/14] vfio: simplify iommu group allocation for mediated devices Christoph Hellwig
2021-08-26 17:24   ` Alex Williamson
2021-08-26 22:59   ` Alex Williamson
2021-08-27  2:17     ` Tian, Kevin
2021-08-27  5:42       ` Christoph Hellwig
2021-08-24 14:46 cleanup vfio iommu_group creation v2 Christoph Hellwig
2021-08-24 14:46 ` [PATCH 07/14] vfio: simplify iommu group allocation for mediated devices Christoph Hellwig
2021-08-25  0:19   ` Jason Gunthorpe
2021-08-25  5:32     ` Christoph Hellwig
2021-08-25 12:21       ` Jason Gunthorpe
2021-08-25 12:24         ` Christoph Hellwig
2021-08-25 12:34           ` Jason Gunthorpe
2021-08-25 12:37             ` Christoph Hellwig
2021-08-25 12:45               ` Jason Gunthorpe
2021-08-25 12:50                 ` Christoph Hellwig
2021-08-25 12:50                   ` Jason Gunthorpe
2021-08-11 15:14 cleanup vfio iommu_group creation Christoph Hellwig
2021-08-11 15:14 ` [PATCH 07/14] vfio: simplify iommu group allocation for mediated devices Christoph Hellwig

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