As the first step to complete live-migration with tracking dirty-pages
written by the VMM, this commit patches the dependent vm-memory crate to
the upstream version with the dirty-page-tracking capability. Most
changes are due to the updated `GuestMemoryMmap`, `GuestRegionMmap`, and
`MmapRegion` structs which are taking an additional generic type
parameter to specify what 'bitmap backend' is used.
The above changes should be transparent to the rest of the code base,
e.g. all unit/integration tests should pass without additional changes.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Add a helper to VirtioCommon which returns duplicates of the EventFds
for kill and pause event.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Now that virtio devices can be updated with add_memory_region(), there's
no need to keep update_memory() around.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Assuming vhost-user devices support CONFIGURE_MEM_SLOTS protocol
feature, we introduce a new method to the VirtioDevice trait in order to
update one single memory at a time.
In case CONFIGURE_MEM_SLOTS is not supported by the backend (feature not
acked), we fallback onto the current way of updating the memory
mappings, that is with SET_MEM_TABLE.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for supporting the notifier function for the legacy
interrupt source group, we need this function to return an EventFd
instead of a reference to this same EventFd.
The reason is we can't return a reference when there's an Arc<Mutex<>>
involved in the call chain.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Even though the driver can provide fewer queues than those advertised
for some device types their is a minimum number that is required for
operation.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It is permissable for the driver to program fewer queues than offered by
the device. Filter the queues so that only the ready ones are included
and check that they have valid addresses configured.
Fixes: #2136
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Rather than having to give and return the ioeventfd used for a device
clone them each time. This will make it simpler when we start handling
the driver enabling fewer queues than advertised by the device.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
We have killed the device thread by writing to the exit EventFd but we
should wait for them to quit to ensure consistency.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The virtio-balloon change the memory size is asynchronous.
VirtioBalloonConfig.actual of balloon device show current balloon size.
This commit add memory_actual_size to vm.info to show memory actual size.
Signed-off-by: Hui Zhu <teawater@antfin.com>
Split the block device implementation into code that be used in common
between multiple different virtio device implementations.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to simplify the transition to VirtioCommon and to avoid needing
to set empty fields derive Default for VirtioCommon.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Introduce VirtioCommon to help remove duplicated functionality and state
between implementations of VirtioDevice. Initially it is only handling
feature acknowledgement and testing.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Using the Rust Barrier mechanism, this patch forces each virtio device
to acknowledge they've been correctly paused before going further.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add a helper function to share code between implementations that can use
a slice accessible data structure for configuration data.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Not every virtio device has any config fields that can be read and most
have none that can be written to.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Split the generic virtio code (queues and device type) from the
VirtioDevice trait, transport and device implementations.
This also simplifies the feature handling in vhost_user_backend as the
vm-virtio crate is no longer has any features.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
