Switch from Single- to Multicore Kernel

Hi,

I was wondering if i could switch from a singlecore kernel to a multicore kernel by enabling all vcores of my astaro hyper-v machine and then upgrading to a new astaro version like 8.300.

Way back, i installed astaro only with one vcore enabled in the vm settings and so astaro installed the single core kernel, but now i need a bit more power and dont want to install the whole astaro again - i know only install and then load the backupkonfig back in and done - but well...

so could this kernel switch be done with the method mentioned above?

Or with other words, is the kernel updated by flashing a new firmware?

Thanks, Albeck.