v1: https://lore.kernel.org/lkml/93f207c0-61e6-3696-f218-e7d7ea9a7...@redhat.com/
This series is the second part of the v1 linked above. The first part with refactoring of vdpa_sim has already been merged. The patches are based on Max Gurtovoy's work and extend the block simulator to have a ramdisk behaviour. As mentioned in the v1 there was 2 issues and I fixed them in this series: 1. The identical mapping in the IOMMU used until now in vdpa_sim created issues when mapping different virtual pages with the same physical address. Fixed by patch "vdpa_sim: use iova module to allocate IOVA addresses" 2. There was a race accessing the IOMMU between the vdpasim_blk_work() and the device driver that map/unmap DMA regions. Fixed by patch "vringh: add 'iotlb_lock' to synchronize iotlb accesses" Since this series is still a RFC, I used the Xie's patch as is to allow vhost-vdpa to use block devices, but I'll rebase when he splits it into multiple patches. The series also includes small fixes for vdpa_sim that I discovered while implementing the block simulator. Thanks for your feedback, Stefano Max Gurtovoy (1): vdpa: add vdpa simulator for block device Stefano Garzarella (8): vdpa_sim: use iova module to allocate IOVA addresses vringh: add 'iotlb_lock' to synchronize iotlb accesses vringh: reset kiov 'consumed' field in __vringh_iov() vringh: implement vringh_kiov_advance() vringh: add vringh_kiov_length() helper vdpa_sim: cleanup kiovs in vdpasim_free() vdpa_sim_blk: implement ramdisk behaviour vdpa_sim_blk: handle VIRTIO_BLK_T_GET_ID Xie Yongji (1): vdpa: Remove the restriction that only supports virtio-net devices drivers/vdpa/vdpa_sim/vdpa_sim.h | 2 + include/linux/vringh.h | 19 +- drivers/vdpa/vdpa_sim/vdpa_sim.c | 118 +++++++---- drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 288 +++++++++++++++++++++++++++ drivers/vhost/vdpa.c | 28 +-- drivers/vhost/vringh.c | 54 +++-- drivers/vdpa/Kconfig | 8 + drivers/vdpa/vdpa_sim/Makefile | 1 + 8 files changed, 433 insertions(+), 85 deletions(-) create mode 100644 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c -- 2.29.2
