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authorAndi Kleen <ak@suse.de>2005-04-16 15:25:15 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:25:15 -0700
commit3dd9d514846cdca1dcef2e4fce666d85e199e844 (patch)
tree28e60a8b733db213e88b0aee8ef3861a93a6fa48 /include/asm-x86_64
parentf2ea2750fbe56867bc8e0eb595115b14195a3e5e (diff)
downloadlinux-3dd9d514846cdca1dcef2e4fce666d85e199e844.tar.gz
[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')
-rw-r--r--include/asm-x86_64/smp.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86_64/smp.h b/include/asm-x86_64/smp.h
index fe523e3e2ff..f5eaa1ab48f 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