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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> |
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4.19.x | ||
5.4.x | ||
5.10.x | ||
5.13.x/experimental | ||
5.15-plus-TDX.x | ||
5.15.x | ||
5.19.x | ||
efi-secret-v5.17-rc6.x | ||
kata-v5.6-april-09-2020.x | ||
SPR-BKC-PC-v9.6.x | ||
tdx-guest-v5.15-4.x | ||
virtio-fs-v0.3.x |