diff options
| author | Igor Mammedov <imammedo@redhat.com> | 2016-07-06 08:20:38 +0200 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2016-07-20 11:58:44 -0300 |
| commit | 9f3aab58539b4cc716e42e772be8116dc2e7d159 (patch) | |
| tree | c18681d78cac0b60a11e52a764ab6dd1088b3ef9 /include | |
| parent | d9c84f196970f78d4b55ab87e03cbcad7c65f86f (diff) | |
pc: Add x86_topo_ids_from_apicid()
It's reverse of apicid_from_topo_ids() and will be used in follow up
patches to fill in data structures for query-hotpluggable-cpus and
for user friendly error reporting.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/i386/topology.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/hw/i386/topology.h b/include/hw/i386/topology.h index fc95572394..1ebaee0f76 100644 --- a/include/hw/i386/topology.h +++ b/include/hw/i386/topology.h @@ -117,6 +117,21 @@ static inline void x86_topo_ids_from_idx(unsigned nr_cores, topo->pkg_id = core_index / nr_cores; } +/* Calculate thread/core/package IDs for a specific topology, + * based on APIC ID + */ +static inline void x86_topo_ids_from_apicid(apic_id_t apicid, + unsigned nr_cores, + unsigned nr_threads, + X86CPUTopoInfo *topo) +{ + topo->smt_id = apicid & + ~(0xFFFFFFFFUL << apicid_smt_width(nr_cores, nr_threads)); + topo->core_id = (apicid >> apicid_core_offset(nr_cores, nr_threads)) & + ~(0xFFFFFFFFUL << apicid_core_width(nr_cores, nr_threads)); + topo->pkg_id = apicid >> apicid_pkg_offset(nr_cores, nr_threads); +} + /* Make APIC ID for the CPU 'cpu_index' * * 'cpu_index' is a sequential, contiguous ID for the CPU. |