diff options
Diffstat (limited to 'arch/i386/kernel/cpu/intel.c')
| -rw-r--r-- | arch/i386/kernel/cpu/intel.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/intel.c b/arch/i386/kernel/cpu/intel.c index b8d847b850d..121aa2176e6 100644 --- a/arch/i386/kernel/cpu/intel.c +++ b/arch/i386/kernel/cpu/intel.c @@ -77,6 +77,27 @@ static void __init Intel_errata_workarounds(struct cpuinfo_x86 *c) } +/* + * find out the number of processor cores on the die + */ +static int __init num_cpu_cores(struct cpuinfo_x86 *c) +{ + unsigned int eax; + + if (c->cpuid_level < 4) + return 1; + + __asm__("cpuid" + : "=a" (eax) + : "0" (4), "c" (0) + : "bx", "dx"); + + if (eax & 0x1f) + return ((eax >> 26) + 1); + else + return 1; +} + static void __init init_intel(struct cpuinfo_x86 *c) { unsigned int l2 = 0; @@ -139,6 +160,8 @@ static void __init init_intel(struct cpuinfo_x86 *c) if ( p ) strcpy(c->x86_model_id, p); + c->x86_num_cores = num_cpu_cores(c); + detect_ht(c); /* Work around errata */ |