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
