After the virtio-blk device support has been introduced in the
previous commit, the vmm need to rely on this new device to boot
from disk images instead of initrd built into the kernel.
In order to achieve the proper support of virtio-blk, this commit
had to handle a few things:
- Register an ioevent fd for each virtqueue. This important to be
notified from the virtio driver that something has been written
on the queue.
- Fix the retrieval of 64bits BAR address. This is needed to provide
the right address which need to be registered as the notification
address from the virtio driver.
- Fix the write_bar and read_bar functions. They were both assuming
to be provided with an address, from which they were trying to
find the associated offset. But the reality is that the offset is
directly provided by the Bus layer.
- Register a new virtio-blk device as a virtio-pci device from the
vm.rs code. When the VM is started, it expects a block device to
be created, using this block device as the VM rootfs.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Introduce emulation of i8042 device to allow the guest to stop the
VM by issuing a reset event.
The device has been copied over from the Crosvm code base, relying on
the commit 0268e26e1ac9e09aa51d733482c5df139cd8d588.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
An exit event is required to be created and handled for the purpose
of letting the guest kernel stop the VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of handling stdin in its own separate loop, we use a generic
one that can be reused for other events handling.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
After starting all vCPUs, we loop for STDIN input.
We need a more scalable eventfd control loop, obviously.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Based on the Firecracker devices crate from commit 9cdb5b2.
It is a trimmed down version compared to the Firecracker one, to remove
a bunch of pulled dependencies (logger, metrics, rate limiter, etc...).
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
