Searched hist:"12 bf2d33" (Results 1 – 2 of 2) sorted by relevance
/openbmc/qemu/hw/ppc/ |
H A D | spapr_cpu_core.c | 12bf2d33 Fri Jul 22 06:10:36 CDT 2016 Greg Kurz <groug@kaod.org> spapr: disintricate core-id from DT semantics The goal of this patch is to have a stable core-id which does not depend on any DT related semantics, which involve non-obvious computations on modern PowerPC server cpus. With this patch, the DT core id is computed on-demand as: (core-id / smp_threads) * smt where smt is the number of threads per core in the host. This formula should be consolidated in a helper since it is needed in several places. Other uses for core-id includes: compute a stable cpu_index (which allows random order hotplug/unplug without breaking migration) and NUMA. Signed-off-by: Greg Kurz <groug@kaod.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
|
H A D | spapr.c | 12bf2d33 Fri Jul 22 06:10:36 CDT 2016 Greg Kurz <groug@kaod.org> spapr: disintricate core-id from DT semantics The goal of this patch is to have a stable core-id which does not depend on any DT related semantics, which involve non-obvious computations on modern PowerPC server cpus. With this patch, the DT core id is computed on-demand as: (core-id / smp_threads) * smt where smt is the number of threads per core in the host. This formula should be consolidated in a helper since it is needed in several places. Other uses for core-id includes: compute a stable cpu_index (which allows random order hotplug/unplug without breaking migration) and NUMA. Signed-off-by: Greg Kurz <groug@kaod.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
|