| commit | bbb65d2d365efe9951290e61678dcf81ec60add4 | |
| author | Suresh Siddha <suresh.b.siddha@intel.com> | |
| Sat, 23 Aug 2008 15:47:10 +0000 (23 17:47 +0200) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Sat, 23 Aug 2008 15:47:10 +0000 (23 17:47 +0200) | ||
| tree | f3eacf1b1313d729e084064ed6dda5db64522bf4 | treesnapshot (tar.gz zip) |
| parent | 87ce786ae5f24e336195805a9fc7428a6f922478 | commitdiff |
x86: use cpuid vector 0xb when available for detecting cpu topology
cpuid leaf 0xb provides extended topology enumeration. This interface provides
the 32-bit x2APIC id of the logical processor and it also provides a new
mechanism to detect SMT and core siblings (which provides increased
addressability).
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
cpuid leaf 0xb provides extended topology enumeration. This interface provides
the 32-bit x2APIC id of the logical processor and it also provides a new
mechanism to detect SMT and core siblings (which provides increased
addressability).
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>