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| author | Andi Kleen <ak@suse.de> | 2005-04-16 15:25:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:25:15 -0700 |
| commit | 3dd9d514846cdca1dcef2e4fce666d85e199e844 (patch) | |
| tree | 28e60a8b733db213e88b0aee8ef3861a93a6fa48 /include/asm-x86_64/smp.h | |
| parent | f2ea2750fbe56867bc8e0eb595115b14195a3e5e (diff) | |
| download | linux-3dd9d514846cdca1dcef2e4fce666d85e199e844.tar.gz linux-3dd9d514846cdca1dcef2e4fce666d85e199e844.tar.bz2 linux-3dd9d514846cdca1dcef2e4fce666d85e199e844.zip | |
[PATCH] x86_64: add support for Intel dual-core detection and displaying
Appended patch adds the support for Intel dual-core detection and displaying
the core related information in /proc/cpuinfo.
It adds two new fields "core id" and "cpu cores" to x86 /proc/cpuinfo and the
"core id" field for x86_64("cpu cores" field is already present in x86_64).
Number of processor cores in a die is detected using cpuid(4) and this is
documented in IA-32 Intel Architecture Software Developer's Manual (vol 2a)
(http://developer.intel.com/design/pentium4/manuals/index_new.htm#sdm_vol2a)
This patch also adds cpu_core_map similar to cpu_sibling_map.
Slightly hacked by AK.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/smp.h')
| -rw-r--r-- | include/asm-x86_64/smp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86_64/smp.h b/include/asm-x86_64/smp.h index fe523e3e2ff4..f5eaa1ab48ff 100644 --- a/include/asm-x86_64/smp.h +++ b/include/asm-x86_64/smp.h @@ -48,7 +48,9 @@ extern void (*mtrr_hook) (void); extern void zap_low_mappings(void); void smp_stop_cpu(void); extern cpumask_t cpu_sibling_map[NR_CPUS]; +extern cpumask_t cpu_core_map[NR_CPUS]; extern u8 phys_proc_id[NR_CPUS]; +extern u8 cpu_core_id[NR_CPUS]; #define SMP_TRAMPOLINE_BASE 0x6000 |