aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/smpboot.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
-rw-r--r--arch/x86/kernel/smpboot.c78
1 files changed, 0 insertions, 78 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 249334f5080a..ef7d10170c30 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -114,10 +114,6 @@ EXPORT_PER_CPU_SYMBOL(cpu_info);
114 114
115atomic_t init_deasserted; 115atomic_t init_deasserted;
116 116
117
118/* Set if we find a B stepping CPU */
119static int __cpuinitdata smp_b_stepping;
120
121#if defined(CONFIG_NUMA) && defined(CONFIG_X86_32) 117#if defined(CONFIG_NUMA) && defined(CONFIG_X86_32)
122 118
123/* which logical CPUs are on which nodes */ 119/* which logical CPUs are on which nodes */
@@ -271,8 +267,6 @@ static void __cpuinit smp_callin(void)
271 cpumask_set_cpu(cpuid, cpu_callin_mask); 267 cpumask_set_cpu(cpuid, cpu_callin_mask);
272} 268}
273 269
274static int __cpuinitdata unsafe_smp;
275
276/* 270/*
277 * Activate a secondary processor. 271 * Activate a secondary processor.
278 */ 272 */
@@ -340,76 +334,6 @@ notrace static void __cpuinit start_secondary(void *unused)
340 cpu_idle(); 334 cpu_idle();
341} 335}
342 336
343static void __cpuinit smp_apply_quirks(struct cpuinfo_x86 *c)
344{
345 /*
346 * Mask B, Pentium, but not Pentium MMX
347 */
348 if (c->x86_vendor == X86_VENDOR_INTEL &&
349 c->x86 == 5 &&
350 c->x86_mask >= 1 && c->x86_mask <= 4 &&
351 c->x86_model <= 3)
352 /*
353 * Remember we have B step Pentia with bugs
354 */
355 smp_b_stepping = 1;
356
357 /*
358 * Certain Athlons might work (for various values of 'work') in SMP
359 * but they are not certified as MP capable.
360 */
361 if ((c->x86_vendor == X86_VENDOR_AMD) && (c->x86 == 6)) {
362
363 if (num_possible_cpus() == 1)
364 goto valid_k7;
365
366 /* Athlon 660/661 is valid. */
367 if ((c->x86_model == 6) && ((c->x86_mask == 0) ||
368 (c->x86_mask == 1)))
369 goto valid_k7;
370
371 /* Duron 670 is valid */
372 if ((c->x86_model == 7) && (c->x86_mask == 0))
373 goto valid_k7;
374
375 /*
376 * Athlon 662, Duron 671, and Athlon >model 7 have capability
377 * bit. It's worth noting that the A5 stepping (662) of some
378 * Athlon XP's have the MP bit set.
379 * See http://www.heise.de/newsticker/data/jow-18.10.01-000 for
380 * more.
381 */
382 if (((c->x86_model == 6) && (c->x86_mask >= 2)) ||
383 ((c->x86_model == 7) && (c->x86_mask >= 1)) ||
384 (c->x86_model > 7))
385 if (cpu_has_mp)
386 goto valid_k7;
387
388 /* If we get here, not a certified SMP capable AMD system. */
389 unsafe_smp = 1;
390 }
391
392valid_k7:
393 ;
394}
395
396static void __cpuinit smp_checks(void)
397{
398 if (smp_b_stepping)
399 printk(KERN_WARNING "WARNING: SMP operation may be unreliable"
400 "with B stepping processors.\n");
401
402 /*
403 * Don't taint if we are running SMP kernel on a single non-MP
404 * approved Athlon
405 */
406 if (unsafe_smp && num_online_cpus() > 1) {
407 printk(KERN_INFO "WARNING: This combination of AMD"
408 "processors is not suitable for SMP.\n");
409 add_taint(TAINT_UNSAFE_SMP);
410 }
411}
412
413/* 337/*
414 * The bootstrap kernel entry code has set these up. Save them for 338 * The bootstrap kernel entry code has set these up. Save them for
415 * a given CPU 339 * a given CPU
@@ -423,7 +347,6 @@ void __cpuinit smp_store_cpu_info(int id)
423 c->cpu_index = id; 347 c->cpu_index = id;
424 if (id != 0) 348 if (id != 0)
425 identify_secondary_cpu(c); 349 identify_secondary_cpu(c);
426 smp_apply_quirks(c);
427} 350}
428 351
429 352
@@ -1193,7 +1116,6 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
1193 pr_debug("Boot done.\n"); 1116 pr_debug("Boot done.\n");
1194 1117
1195 impress_friends(); 1118 impress_friends();
1196 smp_checks();
1197#ifdef CONFIG_X86_IO_APIC 1119#ifdef CONFIG_X86_IO_APIC
1198 setup_ioapic_dest(); 1120 setup_ioapic_dest();
1199#endif 1121#endif