diff options
Diffstat (limited to '3 resources/libvirt')
| -rw-r--r-- | 3 resources/libvirt/mediated-devices.md | 8 | ||||
| -rw-r--r-- | 3 resources/libvirt/sr-iov.md | 6 |
2 files changed, 14 insertions, 0 deletions
diff --git a/3 resources/libvirt/mediated-devices.md b/3 resources/libvirt/mediated-devices.md new file mode 100644 index 0000000..3011a28 --- /dev/null +++ b/3 resources/libvirt/mediated-devices.md @@ -0,0 +1,8 @@ +https://libvirt.org/drvnodedev.html#mediated-devices-mdevs + +They are virtual devices that share a single physical device. + +Similar to [[sr-iov]] but sr-iov required registering and unregistering devices with the host PCIe bus via a host driver. +Mediated devices don't have to do this. + +So why would we still choose sriov?
\ No newline at end of file diff --git a/3 resources/libvirt/sr-iov.md b/3 resources/libvirt/sr-iov.md new file mode 100644 index 0000000..e7eec8e --- /dev/null +++ b/3 resources/libvirt/sr-iov.md @@ -0,0 +1,6 @@ +Single root input/output virtualization: enables sharing of single PCI-e devices with multiple guests. + +Physical device = PF (Physical Function) +Virtual device = VF (Virtual Function) + +A PF is divided (by manufacturer) into *n* VFs. Thus a PF can be shared at most with *n* guests.
\ No newline at end of file |