From 3dd9d514846cdca1dcef2e4fce666d85e199e844 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Sat, 16 Apr 2005 15:25:15 -0700 Subject: [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 Signed-off-by: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-i386/processor.h | 1 + include/asm-i386/smp.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include/asm-i386') diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h index 7149784ed40b..359bb0151742 100644 --- a/include/asm-i386/processor.h +++ b/include/asm-i386/processor.h @@ -98,6 +98,7 @@ extern struct cpuinfo_x86 cpu_data[]; #endif extern int phys_proc_id[NR_CPUS]; +extern int cpu_core_id[NR_CPUS]; extern char ignore_fpu_irq; extern void identify_cpu(struct cpuinfo_x86 *); diff --git a/include/asm-i386/smp.h b/include/asm-i386/smp.h index dd1491225d51..e03a206dfa36 100644 --- a/include/asm-i386/smp.h +++ b/include/asm-i386/smp.h @@ -35,6 +35,7 @@ extern void smp_alloc_memory(void); extern int pic_mode; extern int smp_num_siblings; extern cpumask_t cpu_sibling_map[]; +extern cpumask_t cpu_core_map[]; extern void smp_flush_tlb(void); extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs); -- cgit v1.2.2