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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 Running nested VMX
------------------ ------------------
The nested VMX feature is disabled by default. It can be enabled by giving The nested VMX feature is enabled by default since Linux kernel v4.20. For
the "nested=1" option to the kvm-intel module. 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 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 emulated CPU type (qemu64) does not list the "VMX" CPU feature, so it must be

2
Documentation/virt/kvm/running-nested-guests.rst
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@ -74,7 +74,7 @@ few:
Enabling "nested" (x86) 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 by default for Intel and AMD. (Though your Linux distribution might
override this default.) override this default.)