• Dongli Zhang's avatar
    KVM: x86: to track if L1 is running L2 VM · 43c11d91
    Dongli Zhang authored
    The new per-cpu stat 'nested_run' is introduced in order to track if L1 VM
    is running or used to run L2 VM.
    An example of the usage of 'nested_run' is to help the host administrator
    to easily track if any L1 VM is used to run L2 VM. Suppose there is issue
    that may happen with nested virtualization, the administrator will be able
    to easily narrow down and confirm if the issue is due to nested
    virtualization via 'nested_run'. For example, whether the fix like
    commit 88dddc11
     ("KVM: nVMX: do not use dangling shadow VMCS after
    guest reset") is required.
    Cc: Joe Jin <joe.jin@oracle.com>
    Signed-off-by: default avatarDongli Zhang <dongli.zhang@oracle.com>
    Message-Id: <20210305225747.7682-1-dongli.zhang@oracle.com>
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>