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Diffstat (limited to '3 Resources/libvirt')
| -rw-r--r-- | 3 Resources/libvirt/Mediated devices.md | 11 | ||||
| -rw-r--r-- | 3 Resources/libvirt/SR-IOV.md | 9 |
2 files changed, 20 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..fe9e551 --- /dev/null +++ b/3 Resources/libvirt/Mediated devices.md @@ -0,0 +1,11 @@ +#libvirt #linux #virtualisation + +--- +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..0881ec0 --- /dev/null +++ b/3 Resources/libvirt/SR-IOV.md @@ -0,0 +1,9 @@ +#linux #libvirt #virtualisation + +--- +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 |