On Tue, 23 Jul 2019 17:06:31 +0100 Shameer Kolothum <shameerali.kolothum.thodi@xxxxxxxxxx> wrote: > This is to revive this series which almost made to 4.18 but got dropped > as Alex found an issue[1] with IGD and USB devices RMRR region being > reported as reserved regions. > > Thanks to Eric for his work here[2]. It provides a way to exclude > these regions while reporting the valid iova regions and this respin > make use of that. > > Please note that I don't have a platform to verify the reported RMRR > issue and appreciate testing on those platforms. > > Thanks, > Shameer > > [1] https://lkml.org/lkml/2018/6/5/760 > [2] https://lore.kernel.org/patchwork/cover/1083072/ > > v7-->v8 > -Rebased to 5.3-rc1 > -Addressed comments from Alex and Eric. Please see > individual patch history. > -Added Eric's R-by to patches 4/5/6 > > v6-->v7 > -Rebased to 5.2-rc6 + Eric's patches > -Added logic to exclude IOMMU_RESV_DIRECT_RELAXABLE reserved memory > region type(patch #2). > -Dropped patch #4 of v6 as it is already part of mainline. > -Addressed "container with only an mdev device will have an empty list" > case(patches 4/6 & 5/6 - Suggested by Alex) > > Old > ---- > This series introduces an iova list associated with a vfio > iommu. The list is kept updated taking care of iommu apertures, > and reserved regions. Also this series adds checks for any conflict > with existing dma mappings whenever a new device group is attached to > the domain. > > User-space can retrieve valid iova ranges using VFIO_IOMMU_GET_INFO > ioctl capability chains. Any dma map request outside the valid iova > range will be rejected. > > v5 --> v6 > > -Rebased to 4.17-rc1 > -Changed the ordering such that previous patch#7 "iommu/dma: Move > PCI window region reservation back...") is now patch #4. This > will avoid any bisection issues pointed out by Alex. > -Added Robins's Reviewed-by tag for patch#4 > > v4 --> v5 > Rebased to next-20180315. > > -Incorporated the corner case bug fix suggested by Alex to patch #5. > -Based on suggestions by Alex and Robin, added patch#7. This > moves the PCI window reservation back in to DMA specific path. > This is to fix the issue reported by Eric[1]. > > v3 --> v4 > Addressed comments received for v3. > -dma_addr_t instead of phys_addr_t > -LIST_HEAD() usage. > -Free up iova_copy list in case of error. > -updated logic in filling the iova caps info(patch #5) > > RFCv2 --> v3 > Removed RFC tag. > Addressed comments from Alex and Eric: > - Added comments to make iova list management logic more clear. > - Use of iova list copy so that original is not altered in > case of failure. > > RFCv1 --> RFCv2 > Addressed comments from Alex: > -Introduced IOVA list management and added checks for conflicts with > existing dma map entries during attach/detach. > > Shameer Kolothum (6): > vfio/type1: Introduce iova list and add iommu aperture validity check > vfio/type1: Check reserved region conflict and update iova list > vfio/type1: Update iova list on detach > vfio/type1: check dma map request is within a valid iova range > vfio/type1: Add IOVA range capability support > vfio/type1: remove duplicate retrieval of reserved regions > > drivers/vfio/vfio_iommu_type1.c | 518 +++++++++++++++++++++++++++++++- > include/uapi/linux/vfio.h | 26 +- > 2 files changed, 531 insertions(+), 13 deletions(-) > Applied to the vfio next branch for v5.4 with Eric's additional reviews. Thanks! Alex
