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KVM: Documentation: Fix documentation for nested.

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Nested VMX was enabled by default in commit 1e58e5e591 ("KVM:
VMX: enable nested virtualization by default"), which was merged
in Linux 4.20. This patch is to fix the documentation accordingly.

Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com>
Message-Id: <20210128154747.4242-1-yu.c.zhang@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Yu Zhang 2021-01-28 23:47:47 +08:00 • committed by Paolo Bonzini
parent 074489b77a
commit ae000861b9
2 changed files with 5 additions and 3 deletions
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6
Documentation/virt/kvm/nested-vmx.rst
View file

@ -37,8 +37,10 @@ call L2.
Running nested VMX
------------------
The nested VMX feature is disabled by default. It can be enabled by giving
the "nested=1" option to the kvm-intel module.
The nested VMX feature is enabled by default since Linux kernel v4.20. For
older Linux kernel, it can be enabled by giving the "nested=1" option to the
kvm-intel module.
No modifications are required to user space (qemu). However, qemu's default
emulated CPU type (qemu64) does not list the "VMX" CPU feature, so it must be

2
Documentation/virt/kvm/running-nested-guests.rst
View file

@ -74,7 +74,7 @@ few:
Enabling "nested" (x86)
-----------------------
From Linux kernel v4.19 onwards, the ``nested`` KVM parameter is enabled
From Linux kernel v4.20 onwards, the ``nested`` KVM parameter is enabled
by default for Intel and AMD. (Though your Linux distribution might
override this default.)