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54 lines
1.6 KiB
Text
54 lines
1.6 KiB
Text
= Enabling nested virtualization in KVM
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[[enabling-nested-virtualization-in-kvm]]
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Nested virtualization allows you to run a virtual machine (VM) inside
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another VM while still using hardware acceleration from the host.
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== Checking if nested virtualization is supported
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For Intel processors, check the `/sys/module/kvm_intel/parameters/nested` file. +
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For AMD processors, check the `/sys/module/kvm_amd/parameters/nested` file. +
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If you see `1` or `Y`,nested virtualization is supported; if you see `0` or `N`, nested virtualization is not supported.
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For example:
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....
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$ cat /sys/module/kvm_intel/parameters/nested
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Y
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....
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== Enabling nested virtualization
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To enable nested virtualization for Intel processors:
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. Shut down all running VMs and unload the `kvm_probe` module:
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+
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----
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# modprobe -r kvm_intel
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----
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. Activate the nesting feature:
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+
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----
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# modprobe kvm_intel nested=1
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----
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. 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:
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+
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----
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options kvm_intel nested=1
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----
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To enable nested virtualization for AMD processors:
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. Shut down all running VMs and unload the `kvm_amd` module:
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+
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----
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# modprobe -r kvm_amd
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----
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. Activate the nesting feature:
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+
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----
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# modprobe kvm_amd nested=1
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----
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. 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:
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+
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----
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options kvm_amd nested=1
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----
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