Messages in this thread | | | From | Cindy Lu <> | Subject | [RFC 0/7] vdpa: Add support for iommufd | Date | Sun, 24 Sep 2023 01:05:33 +0800 |
| |
Hi All Really apologize for the delay, this is the draft RFC for iommufd support for vdpa, This code provides the basic function for iommufd support
The code was tested and passed in device vdpa_sim_net The qemu code is https://gitlab.com/lulu6/gitlabqemutmp/-/tree/iommufdRFC The kernel code is https://gitlab.com/lulu6/vhost/-/tree/iommufdRFC
ToDo 1. this code is out of date and needs to clean and rebase on the latest code 2. this code has some workaround, I Skip the check for iommu_group and CACHE_COHERENCY, also some misc issues like need to add mutex for iommfd operations 3. only test in emulated device, other modes not tested yet
After addressed these problems I will send out a new version for RFC. I will provide the code in 3 weeks
Thanks Cindy Signed-off-by: Cindy Lu <lulu@redhat.com> The test step is 1. create vdpa_sim device ... vdpa dev add name vdpa15 mgmtdev vdpasim_net ... 2. load the VM with the command -object iommufd,id=iommufd0 \ -device virtio-net-pci,netdev=vhost-vdpa1,disable-legacy=on,disable-modern=off\ -netdev type=vhost-vdpa,vhostdev=/dev/vhost-vdpa-0,id=vhost-vdpa1,iommufd=iommufd0\
3. in guest VM you can find the vdpa_sim port works well. [root@ubuntunew ~]# ifconfig eth0 eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::5054:ff:fe12:3456 prefixlen 64 scopeid 0x20<link> ether 52:54:00:12:34:56 txqueuelen 1000 (Ethernet) RX packets 53 bytes 9108 (8.8 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 53 bytes 9108 (8.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@ubuntunew ~]# ./test.sh eth0 [ 172.815279] pktgen: Packet Generator for packet performance testing. Version: 2.75 Adding queue 0 of eth0 Configuring devices eth0@0 Running... ctrl^C to stop
[root@ubuntunew ~]# ifconfig eth0 eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::5054:ff:fe12:3456 prefixlen 64 scopeid 0x20<link> ether 52:54:00:12:34:56 txqueuelen 1000 (Ethernet) RX packets 183455 bytes 11748533 (11.2 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 183473 bytes 11749685 (11.2 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Cindy Lu (7): vhost/iommufd: Add the functions support iommufd Kconfig: Add the new file vhost/iommufd vhost: Add 3 new uapi to support iommufd vdpa: change the map/unmap process to support iommufd vdpa: Add new vdpa_config_ops vdpa_sim :Add support for iommufd iommufd: Skip the CACHE_COHERENCY and iommu group check
drivers/iommu/iommufd/device.c | 6 +- drivers/vdpa/vdpa_sim/vdpa_sim.c | 8 ++ drivers/vhost/Kconfig | 1 + drivers/vhost/Makefile | 1 + drivers/vhost/iommufd.c | 151 +++++++++++++++++++++++ drivers/vhost/vdpa.c | 201 +++++++++++++++++++++++++++++++ drivers/vhost/vhost.h | 21 ++++ include/linux/vdpa.h | 34 +++++- include/uapi/linux/vhost.h | 71 +++++++++++ 9 files changed, 490 insertions(+), 4 deletions(-) create mode 100644 drivers/vhost/iommufd.c
-- 2.34.3
| |