aarch64: Transparently adjusting the System Counter to account for stolen time (kvm-steal-time)

[Jesus Sanchez-Palencia]

Hi there,

Support for kvm-steal-time was added last year to QEMU 5.2, and my
understanding from it is that it exposes a paravirtualized device to
guest OS so they can read from a memory-mapped register how many
nanoseconds have been "stolen" by the hypervisor when it was executing
host threads other than the vCPU backing threads.

Building on top of that, have you folks considered adding a feature to
QEMU where the view of the system counter for guest OSes would be
adjusted transparently to account for the stolen time instead?

Thanks,
Jesus