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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-08-23 17:47:10 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-23 17:47:10 +0200 |
| commit | bbb65d2d365efe9951290e61678dcf81ec60add4 (patch) | |
| tree | f3eacf1b1313d729e084064ed6dda5db64522bf4 /include/asm-x86/processor.h | |
| parent | 87ce786ae5f24e336195805a9fc7428a6f922478 (diff) | |
| download | lwn-bbb65d2d365efe9951290e61678dcf81ec60add4.tar.gz lwn-bbb65d2d365efe9951290e61678dcf81ec60add4.zip | |
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>
Diffstat (limited to 'include/asm-x86/processor.h')
| -rw-r--r-- | include/asm-x86/processor.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h index 5f58da401b43..79338fe965d2 100644 --- a/include/asm-x86/processor.h +++ b/include/asm-x86/processor.h @@ -161,6 +161,7 @@ extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); extern unsigned short num_cache_leaves; +extern void detect_extended_topology(struct cpuinfo_x86 *c); #if defined(CONFIG_X86_HT) || defined(CONFIG_X86_64) extern void detect_ht(struct cpuinfo_x86 *c); #else |