mirror of
https://pagure.io/fedora-docs/quick-docs.git
synced 2024-11-28 14:56:35 +00:00
56 lines
1.6 KiB
Text
56 lines
1.6 KiB
Text
[[proc_enabling-nested-virtualization-in-kvm]]
|
|
= Enabling nested virtualization in KVM
|
|
|
|
Nested virtualization allows you to run a virtual machine (VM) inside another VM while still using hardware acceleration from the host.
|
|
|
|
== Checking if nested virtualization is supported
|
|
|
|
For Intel processors, check the `/sys/module/kvm_intel/parameters/nested` file. For AMD processors, check the `/sys/module/kvm_amd/parameters/nested` file. If you see `1` or `Y`, nested virtualization is supported; if you see `0` or `N`, nested virtualization is not supported.
|
|
|
|
For example:
|
|
|
|
----
|
|
$ cat /sys/module/kvm_intel/parameters/nested
|
|
Y
|
|
----
|
|
|
|
|
|
== Enabling nested virtualization
|
|
|
|
To enable nested virtualization for Intel processors:
|
|
|
|
. Shut down all running VMs and unload the `kvm_probe` module:
|
|
+
|
|
----
|
|
# modprobe -r kvm_intel
|
|
----
|
|
. Activate the nesting feature:
|
|
+
|
|
----
|
|
# modprobe kvm_intel nested=1
|
|
----
|
|
+
|
|
. Nested virtualization is enabled until the host is rebooted. To enable it permanently, add the following line to the `/etc/modprobe.d/kvm.conf` file:
|
|
+
|
|
----
|
|
options kvm_intel nested=1
|
|
----
|
|
|
|
To enable nested virtualization for AMD processors:
|
|
|
|
. Shut down all running VMs and unload the `kvm_amd` module:
|
|
+
|
|
----
|
|
# modprobe -r kvm_amd
|
|
----
|
|
. Activate the nesting feature:
|
|
+
|
|
----
|
|
# modprobe kvm_amd nested=1
|
|
----
|
|
. Nested virtualization is enabled until the host is rebooted. To enable it permanently, add the following line to the `/etc/modprobe.d/kvm.conf` file:
|
|
+
|
|
----
|
|
options kvm_amd nested=1
|
|
----
|
|
|