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Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index e264ebc35e27..70254eaa5229 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -6489,3 +6489,10 @@ processor's dirty page buffers into the kernel buffer (with dirty bitmaps, the flushing is done by the KVM_GET_DIRTY_LOG ioctl). To achieve that, one needs to kick the vcpu out of KVM_RUN using a signal. The resulting vmexit ensures that all dirty GFNs are flushed to the dirty rings. + +NOTE: the capability KVM_CAP_DIRTY_LOG_RING and the corresponding +ioctl KVM_RESET_DIRTY_RINGS are mutual exclusive to the existing ioctls +KVM_GET_DIRTY_LOG and KVM_CLEAR_DIRTY_LOG. After enabling +KVM_CAP_DIRTY_LOG_RING with an acceptable dirty ring size, the virtual +machine will switch to ring-buffer dirty page tracking and further +KVM_GET_DIRTY_LOG or KVM_CLEAR_DIRTY_LOG ioctls will fail. |