By adding an internal layer of abstraction (the hidden VirtioPausable
trait), we can factorize the virtio common code.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Now that we unified epoll_thread to potentially be a vector of threads,
it makes sense to make it a plural field.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Although only the block and net virtio devices can actually be multi
threaded (for now), handling them as special cases makes the code more
complex.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Callbacks are not the most Rust idiomatic way of programming. The right
way is to use a Trait to provide multiple implementation of the same
interface.
Additionally, a Trait will allow for multiple functions to be defined
while using callbacks means that a new callback must be introduced for
each new function we want to add.
For these two reasons, the current commit modifies the existing
VirtioInterrupt callback into a Trait of the same name.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This allows us to change the memory map that is being used by the
devices via an atomic swap (by replacing the map with another one). The
ArcSwap provides the mechanism for atomically swapping from to another
whilst still giving good read performace. It is inside an Arc so that we
can use a single ArcSwap for all users.
Not covered by this change is replacing the GuestMemoryMmap itself.
This change also removes some vertical whitespace from use blocks in the
files that this commit also changed. Vertical whitespace was being used
inconsistently and broke rustfmt's behaviour of ordering the imports as
it would only do it within the block.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Due to the amount of code currently duplicated across virtio devices,
the stats for this commit is on the large side but it's mostly more
duplicated code, unfortunately.
Migratable and Snapshotable placeholder implementations are provided as
well, making all virtio devices Migratable.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Adding virtio feature VIRTIO_F_IOMMU_PLATFORM when explicitly asked by
the user. The need for this feature is to be able to attach the virtio
device to a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio specification defines a device can be reset, which was not
supported by this virtio-vsock implementation. The reason it is needed
is to support unbinding this device from the guest driver, and rebind
it to vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This unit testing porting effort is based off of Firecracker commit
1e1cb6f8f8003e0bdce11d265f0feb23249a03f6
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This is the last step connecting the dots between the virtio-vsock
device and the bulk of the logic hosted in the unix and csm modules.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit relies on the new vsock::unix module to create the backend
that will be used from the virtio-vsock device.
The concept of backend is interesting here as it would allow for a vhost
kernel backend to be plugged if that was needed someday.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
There is a lot of code related to this virtio-vsock hybrid
implementation, that's why it's better to keep it under its
own module.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
