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Subject[PATCH v3 00/13] vdpa: add vdpa simulator for block device
Date
v3:
- added new patches
- 'vringh: explain more about cleaning riov and wiov'
- 'vdpa: add return value to get_config/set_config callbacks'
- 'vhost/vdpa: remove vhost_vdpa_config_validate()'
- split Xie's patch 'vhost/vdpa: Remove the restriction that only supports
virtio-net devices'
- updated Mellanox copyright to NVIDIA [Max]
- explained in the 'vdpa: add vdpa simulator for block device' commit
message that inputs are validated in subsequent patches [Stefan]

v2: https://lore.kernel.org/lkml/20210128144127.113245-1-sgarzare@redhat.com/
v1: https://lore.kernel.org/lkml/93f207c0-61e6-3696-f218-e7d7ea9a7c93@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"

I used the Xie's patch coming from VDUSE series to allow vhost-vdpa to use
block devices. As Jason suggested I split it into two patches and I added
a return value to get_config()/set_config() callbacks.

The series also includes small fixes for vringh, vdpa, and vdpa_sim that I
discovered while implementing and testing the block simulator.

Thanks for your feedback,
Stefano

Max Gurtovoy (1):
vdpa: add vdpa simulator for block device

Stefano Garzarella (11):
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: explain more about cleaning riov and wiov
vringh: implement vringh_kiov_advance()
vringh: add vringh_kiov_length() helper
vdpa_sim: cleanup kiovs in vdpasim_free()
vdpa: add return value to get_config/set_config callbacks
vhost/vdpa: remove vhost_vdpa_config_validate()
vdpa_sim_blk: implement ramdisk behaviour
vdpa_sim_blk: handle VIRTIO_BLK_T_GET_ID

Xie Yongji (1):
vhost/vdpa: Remove the restriction that only supports virtio-net
devices

drivers/vdpa/vdpa_sim/vdpa_sim.h | 2 +
include/linux/vdpa.h | 18 +-
include/linux/vringh.h | 19 +-
drivers/vdpa/ifcvf/ifcvf_main.c | 24 ++-
drivers/vdpa/mlx5/net/mlx5_vnet.c | 17 +-
drivers/vdpa/vdpa_sim/vdpa_sim.c | 134 ++++++++-----
drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 288 +++++++++++++++++++++++++++
drivers/vhost/vdpa.c | 47 ++---
drivers/vhost/vringh.c | 69 +++++--
drivers/vdpa/Kconfig | 8 +
drivers/vdpa/vdpa_sim/Makefile | 1 +
11 files changed, 504 insertions(+), 123 deletions(-)
create mode 100644 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c

--
2.29.2

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