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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 /arch/i386/kernel/cpu/proc.c
parentf2ea2750fbe56867bc8e0eb595115b14195a3e5e (diff)
downloadblackbird-op-linux-3dd9d514846cdca1dcef2e4fce666d85e199e844.tar.gz
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[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 'arch/i386/kernel/cpu/proc.c')
-rw-r--r--arch/i386/kernel/cpu/proc.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c
index 89a2956ee657..0f1125b15b76 100644
--- a/arch/i386/kernel/cpu/proc.c
+++ b/arch/i386/kernel/cpu/proc.c
@@ -129,6 +129,14 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n",
c->loops_per_jiffy/(500000/HZ),
(c->loops_per_jiffy/(5000/HZ)) % 100);
+
+#ifdef CONFIG_SMP
+ /* Put new fields at the end to lower the probability of
+ breaking user space parsers. */
+ seq_printf(m, "core id\t\t: %d\n", cpu_core_id[n]);
+ seq_printf(m, "cpu cores\t: %d\n", c->x86_num_cores);
+#endif
+
return 0;
}
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