add pci add and del guest kernel patch as the extension
in the upcall device manager server side.
also, dump config version to 120 since we need to add config
for dragonball pci in upcall
fixes: #8741
Signed-off-by: Gerry Liu <gerry@linux.alibaba.com>
Signed-off-by: Helin Guo <helinguo@linux.alibaba.com>
Signed-off-by: Chao Wu <chaowu@linux.alibaba.com>
The vcpu hotplug/hotunplug feature is implemented with upcall. This commit
add three patches to support the feature on aarch64. Patches:
> 0005: add support of upcall on aarch64
> 0006: skip activate offline cpus' MSI interrupt
> 0007: set the correct boot cpu number
Fixes: #6010
Signed-off-by: xuejun-xj <jiyunxue@linux.alibaba.com>
Upcall is a direct communication tool between VMM and guest developed
upon vsock. The server side of the upcall is a driver in guest kernel
(kernel patches are needed for this feature) and it'll start to serve
the requests after the kernel starts. And the client side is in
Dragonball VMM , it'll be a thread that communicates with vsock through
uds.
We want to keep the lightweight of the VM through the implementation of
the upcall, through which we could achieve vCPU hotplug, virtio-mmio
hotplug without implementing complex and heavy virtualization features
such as ACPI virtualization.
fixes: #5642
Signed-off-by: Chao Wu <chaowu@linux.alibaba.com>
