vhost-user-rng.rst (1065B)
1 QEMU vhost-user-rng - RNG emulation 2 =================================== 3 4 Background 5 ---------- 6 7 What follows builds on the material presented in vhost-user.rst - it should 8 be reviewed before moving forward with the content in this file. 9 10 Description 11 ----------- 12 13 The vhost-user-rng device implementation was designed to work with a random 14 number generator daemon such as the one found in the vhost-device crate of 15 the rust-vmm project available on github [1]. 16 17 [1]. https://github.com/rust-vmm/vhost-device 18 19 Examples 20 -------- 21 22 The daemon should be started first: 23 24 :: 25 26 host# vhost-device-rng --socket-path=rng.sock -c 1 -m 512 -p 1000 27 28 The QEMU invocation needs to create a chardev socket the device can 29 use 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 ...