KVM supports dirty page tracking, but the feature is currently unimplemented in the adapter. According to the API, one can use the KVM_GET_DIRTY_LOG IOCTL to get the dirty bitmap of a specified range and KVM_CLEAR_DIRTY_LOG to clear it. Some features control how these IOCTLs work. virt86 currently does not specify if the dirty bitmap is to be cleared when read, but WHPX (the only other platform to support this feature so far) clears it automatically.
StrikerX3
commented
5 years ago
KVM supports dirty page tracking, but the feature is currently unimplemented in the adapter. According to the API, one can use the
KVM_GET_DIRTY_LOGIOCTL to get the dirty bitmap of a specified range andKVM_CLEAR_DIRTY_LOGto clear it. Some features control how these IOCTLs work. virt86 currently does not specify if the dirty bitmap is to be cleared when read, but WHPX (the only other platform to support this feature so far) clears it automatically.