diff options
Diffstat (limited to 'src/cpu/intel/hyperthreading/intel_sibling.c')
| -rw-r--r-- | src/cpu/intel/hyperthreading/intel_sibling.c | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/src/cpu/intel/hyperthreading/intel_sibling.c b/src/cpu/intel/hyperthreading/intel_sibling.c index b9a9ae7bb1..8377cd0130 100644 --- a/src/cpu/intel/hyperthreading/intel_sibling.c +++ b/src/cpu/intel/hyperthreading/intel_sibling.c @@ -7,13 +7,6 @@ #include <smp/spinlock.h> #include <assert.h> -#if !CONFIG_SERIAL_CPU_INIT -#error Intel hyper-threading requires serialized cpu init -#endif - -static int first_time = 1; -static int disable_siblings = !CONFIG_LOGICAL_CPUS; - /* Return true if running thread does not have the smallest lapic ID * within a CPU core. */ @@ -34,61 +27,3 @@ int intel_ht_sibling(void) threads = (apic_ids / core_ids); return !!(lapicid() & (threads-1)); } - -void intel_sibling_init(device_t cpu) -{ - unsigned i, siblings; - struct cpuid_result result; - - /* On the bootstrap processor see if I want sibling cpus enabled */ - if (first_time) { - first_time = 0; - get_option(&disable_siblings, "hyper_threading"); - } - result = cpuid(1); - /* Is hyperthreading supported */ - if (!(result.edx & (1 << 28))) { - return; - } - /* See how many sibling cpus we have */ - siblings = (result.ebx >> 16) & 0xff; - if (siblings < 1) { - siblings = 1; - } - - printk(BIOS_DEBUG, "CPU: %u %d siblings\n", - cpu->path.apic.apic_id, - siblings); - - /* See if I am a sibling cpu */ - if (cpu->path.apic.apic_id & (siblings -1)) { - if (disable_siblings) { - cpu->enabled = 0; - } - return; - } - - /* I am the primary cpu start up my siblings */ - for(i = 1; i < siblings; i++) { - struct device_path cpu_path; - device_t new; - /* Build the cpu device path */ - cpu_path.type = DEVICE_PATH_APIC; - cpu_path.apic.apic_id = cpu->path.apic.apic_id + i; - - - /* Allocate new cpu device structure iff sibling CPU - * was not in static device tree. - */ - new = alloc_find_dev(cpu->bus, &cpu_path); - - if (!new) { - continue; - } - - printk(BIOS_DEBUG, "CPU: %u has sibling %u\n", - cpu->path.apic.apic_id, - new->path.apic.apic_id); - } -} - |