Feature request: Add vCPU to thread ID API

[jodh-intel]

The new Kata Containers rust runtime (runtime-rs) defines a get_thread_ids() API that hypervisor drivers, such as the Kata rust Cloud Hypervisor driver need to implement. This should return a map of vCPU numbers to host-side thread IDs.

As such, please consider adding a new API to allow the Kata CH driver to query these vCPU details.

/cc @likebreath

[rbradford]

The new Kata Containers rust runtime (runtime-rs) defines a get_thread_ids() API that hypervisor drivers, such as the Kata rust Cloud Hypervisor driver need to implement. This should return a map of vCPU numbers to host-side thread IDs.

As such, please consider adding a new API to allow the Kata CH driver to query these vCPU details.

/cc @likebreath

The vcpu id is embedded in the thread name:

cloud-hypervisor/vmm/src/cpu.rs

Line 944 in 5c0b665

.name(format!("vcpu{vcpu_id}"))

I think that should be sufficient.

[peng6662001]

ps -T -p pid

3644621 3644631 pts/3    00:00:02 vcpu0
3644621 3644632 pts/3    00:00:01 vcpu1
3644621 3644633 pts/3    00:00:00 vcpu2
3644621 3644634 pts/3    00:00:00 vcpu3