dc6b1c0984
For injecting multi-core and multi-threading CPU topology into guests extend the -smp syntax to accommodate cores and threads specification. Syntax: -smp smp_value[,cores=nr_cores][,threads=nr_threads]\ [,socket=nr_sockets][,maxcpus=max_cpus] smp_value is the legacy value specifying the total number of vCPUs for the guest. If you specify one of cores, threads or sockets this value can be omitted. Missing values will be computed to fulfill: smp_value = nr_cores * nr_threads * nr_sockets where it will favour sockets over cores over threads (to mimic the current behavior, which will only inject multiple sockets.) So -smp 4,threads=2 will inject two sockets with 2 threads each, -smp cores=4 is an abbreviation for -smp 4,cores=4,threads=1,sockets=1. If max_cpus (the number of hotpluggable CPUs) is omitted, it will be set to smp_value. Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Read the documentation in qemu-doc.html. Fabrice Bellard.