This series is mainly for testing live migration between 2 vdpa_sim_blk devices.
The first patch is preparation and moves the buffer allocation into devices, the second patch adds the `shared_buffer_mutex` parameter to vdpa_sim_blk to use the same ramdisk for all devices. Tested with QEMU v8.0.0-rc2 in this way: modprobe vhost_vdpa modprobe vdpa_sim_blk shared_backend=true vdpa dev add mgmtdev vdpasim_blk name blk0 vdpa dev add mgmtdev vdpasim_blk name blk1 qemu-system-x86_64 -m 512M -smp 2 -M q35,accel=kvm,memory-backend=mem \ -object memory-backend-file,share=on,id=mem,size="512M",mem-path="/dev/shm" ... -blockdev node-name=drive_src1,driver=virtio-blk-vhost-vdpa,path=/dev/vhost-vdpa-1,cache.direct=on \ -device virtio-blk-pci,id=src1,bootindex=2,drive=drive_src1 \ -incoming tcp:0:3333 qemu-system-x86_64 -m 512M -smp 2 -M q35,accel=kvm,memory-backend=mem \ -object memory-backend-file,share=on,id=mem,size="512M",mem-path="/dev/shm" ... -blockdev node-name=drive_src1,driver=virtio-blk-vhost-vdpa,path=/dev/vhost-vdpa-0,cache.direct=on \ -device virtio-blk-pci,id=src1,bootindex=2,drive=drive_src1 (qemu) migrate -d tcp:0:3333 Stefano Garzarella (2): vdpa_sim: move buffer allocation in the devices vdpa_sim_blk: support shared backend drivers/vdpa/vdpa_sim/vdpa_sim.h | 3 +- drivers/vdpa/vdpa_sim/vdpa_sim.c | 7 +-- drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 83 +++++++++++++++++++++++++--- drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 28 +++++++--- 4 files changed, 100 insertions(+), 21 deletions(-) -- 2.39.2 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
