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SubjectRe: [RFC v3 0/3] vfio_pci: wrap pci device as a mediated device
On Thu, 23 May 2019 08:44:57 +0000
"Liu, Yi L" <yi.l.liu@intel.com> wrote:

> Hi Alex,
>
> Sorry to disturb you. Do you want to review on this version or review a rebased version? :-) If rebase version is better, I can try to do it asap.

Hi Yi,

Perhaps you missed my comments on 1/3:

https://www.spinics.net/lists/kvm/msg187282.html

In summary, it looks pretty good, but consider a file name more
consistent with the existing files and prune out the code changes from
the code moves so they can be reviewed more easily. Thanks,

Alex

> > -----Original Message-----
> > From: Liu, Yi L
> > Sent: Tuesday, April 23, 2019 8:15 PM
> > To: alex.williamson@redhat.com; kwankhede@nvidia.com
> > Cc: Tian, Kevin <kevin.tian@intel.com>; baolu.lu@linux.intel.com; Liu, Yi L
> > <yi.l.liu@intel.com>; Sun, Yi Y <yi.y.sun@intel.com>; joro@8bytes.org; jean-
> > philippe.brucker@arm.com; peterx@redhat.com; linux-kernel@vger.kernel.org;
> > kvm@vger.kernel.org; yamada.masahiro@socionext.com; iommu@lists.linux-
> > foundation.org
> > Subject: [RFC v3 0/3] vfio_pci: wrap pci device as a mediated device
> >
> > This patchset aims to add a vfio-pci-like meta driver as a demo user of the vfio
> > changes introduced in "vfio/mdev: IOMMU aware mediated device" patchset from
> > Baolu Lu.
> >
> > Previous RFC v1 has given two proposals and the discussion could be found in
> > following link. Per the comments, this patchset adds a separate driver named vfio-
> > mdev-pci. It is a sample driver, but loactes in drivers/vfio/pci due to code sharing
> > consideration.
> > The corresponding Kconfig definition is in samples/Kconfig.
> >
> > https://lkml.org/lkml/2019/3/4/529
> >
> > Besides the test purpose, per Alex's comments, it could also be a good base driver
> > for experimenting with device specific mdev migration.
> >
> > Specific interface tested in this proposal:
> >
> > *) int mdev_set_iommu_device(struct device *dev,
> > struct device *iommu_device)
> > introduced in the patch as below:
> > "[PATCH v5 6/8] vfio/mdev: Add iommu related member in mdev_device"
> >
> >
> > Links:
> > *) Link of "vfio/mdev: IOMMU aware mediated device"
> > https://lwn.net/Articles/780522/
> >
> > Please feel free give your comments.
> >
> > Thanks,
> > Yi Liu
> >
> > Change log:
> > v2->v3:
> > - use vfio-mdev-pci instead of vfio-pci-mdev
> > - place the new driver under drivers/vfio/pci while define
> > Kconfig in samples/Kconfig to clarify it is a sample driver
> >
> > v1->v2:
> > - instead of adding kernel option to existing vfio-pci
> > module in v1, v2 follows Alex's suggestion to add a
> > separate vfio-pci-mdev module.
> > - new patchset subject: "vfio/pci: wrap pci device as a mediated device"
> >
> > Liu, Yi L (3):
> > vfio_pci: split vfio_pci.c into two source files
> > vfio/pci: protect cap/ecap_perm bits alloc/free with atomic op
> > smaples: add vfio-mdev-pci driver
> >
> > drivers/vfio/pci/Makefile | 7 +-
> > drivers/vfio/pci/common.c | 1511 +++++++++++++++++++++++++++++++++++
> > drivers/vfio/pci/vfio_mdev_pci.c | 386 +++++++++
> > drivers/vfio/pci/vfio_pci.c | 1476 +---------------------------------
> > drivers/vfio/pci/vfio_pci_config.c | 9 +
> > drivers/vfio/pci/vfio_pci_private.h | 27 +
> > samples/Kconfig | 11 +
> > 7 files changed, 1962 insertions(+), 1465 deletions(-) create mode 100644
> > drivers/vfio/pci/common.c create mode 100644 drivers/vfio/pci/vfio_mdev_pci.c
> >
> > --
> > 2.7.4
>

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