diff options
Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 43 |
1 files changed, 43 insertions, 0 deletions
@@ -194,6 +194,49 @@ the emulated GPIO device's pins: cat /sys/class/gpio/gpiochip480/base > /sys/class/gpio/export for ((i=0;i<12;i++)); do cat /sys/class/gpio/OUT0/value; done +libvirt +------- + +1. Add `xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'` to the `domain` + element. + +2. Enable sharing of the guest's RAM: + + <memoryBacking> + <source type='file'/> + <access mode='shared'/> + </memoryBacking> + +3. Pass the vfio-user device: + + <qemu:commandline> + <qemu:arg value='-device'/> + <qemu:arg value='vfio-user-pci,socket=/var/run/vfio-user.sock,x-enable-migration=on'/> + </qemu:commandline> + + +nvmf/vfio-user +-------------- + +[SPDK v21.01](https://github.com/spdk/spdk/releases/tag/v21.01) added +experimental support for a virtual NVMe controller. The controller can be +used with the same command line as the one used for GPIO. + +To use the nvmf/vfio-user target with a libvirt quest, the guest RAM must be +backed by hugepages: + + <memoryBacking> + <hugepages> + <page size='2048' unit='KiB'/> + </hugepages> + <source type='memfd'/> + <access mode='shared'/> + </memoryBacking> + +Becasue SPDK must be run as root, either fix the vfio-user socket permissions +or configure libvirt to run QEMU as root. + + Mailing List & Chat =================== |