On Fri, 2023-06-30 at 11:17 +0200, Pierre Morel wrote: > The topology information are attributes of the CPU and are > specified during the CPU device creation. > > On hot plug we: > - calculate the default values for the topology for drawers, > books and sockets in the case they are not specified. > - verify the CPU attributes > - check that we have still room on the desired socket > > The possibility to insert a CPU in a mask is dependent on the > number of cores allowed in a socket, a book or a drawer, the > checking is done during the hot plug of the CPU to have an > immediate answer. > > If the complete topology is not specified, the core is added > in the physical topology based on its core ID and it gets > defaults values for the modifier attributes. > > This way, starting QEMU without specifying the topology can > still get some advantage of the CPU topology. > > Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx> Reviewed-by: Nina Schoetterl-Glausch <nsg@xxxxxxxxxxxxx> if you address Thomas' comments.
