1QEMU vhost-user-rng - RNG emulation 2=================================== 3 4Background 5---------- 6 7What follows builds on the material presented in vhost-user.rst - it should 8be reviewed before moving forward with the content in this file. 9 10Description 11----------- 12 13The vhost-user-rng device implementation was designed to work with a random 14number generator daemon such as the one found in the vhost-device crate of 15the rust-vmm project available on github [1]. 16 17[1]. https://github.com/rust-vmm/vhost-device 18 19Examples 20-------- 21 22The daemon should be started first: 23 24:: 25 26 host# vhost-device-rng --socket-path=rng.sock -c 1 -m 512 -p 1000 27 28The QEMU invocation needs to create a chardev socket the device can 29use to communicate as well as share the guests memory over a memfd. 30 31:: 32 33 host# qemu-system \ 34 -chardev socket,path=$(PATH)/rng.sock,id=rng0 \ 35 -device vhost-user-rng-pci,chardev=rng0 \ 36 -m 4096 \ 37 -object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on \ 38 -numa node,memdev=mem \ 39 ... 40