1 // SPDX-License-Identifier: GPL-2.0-or-later
6  *	(c) 1998, 1999, 2000, 2009 Ingo Molnar <mingo@redhat.com>
13  *	Pentium Pro and Pentium-II/Xeon MP machines.
19  *		Alan Cox	:	By repeated request 8) - Total BogoMIPS report.
32  *		Martin J. Bligh	: 	Added support for multi-quad systems
84 #include <asm/intel-family.h>
86 #include <asm/spec-ctrl.h>
90 #include <asm/spec-ctrl.h>
185 	if (!--smpboot_warm_reset_vector_count) {  in smpboot_restore_warm_reset_vector()
263 	 * 32-bit specific. 64-bit reaches this code with the correct page  in start_secondary()
294 	 * synchronization state to ALIVE and spin-waits for the control CPU to  in start_secondary()
340  * topology_phys_to_logical_pkg - Map a physical package id to a logical
343  * Returns logical package id or -1 if not found
353 	return -1;  in topology_phys_to_logical_pkg()
358  * topology_phys_to_logical_die - Map a physical die id to logical
362  * Returns logical die id or -1 if not found
373 	return -1;  in topology_phys_to_logical_die()
377  * topology_update_package_map - Update the physical to logical package map
402  * topology_update_die_map - Update the physical to logical die map
433 	c->cpu_index = id;  in smp_store_boot_cpu_info()
434 	topology_update_package_map(c->topo.pkg_id, id);  in smp_store_boot_cpu_info()
435 	topology_update_die_map(c->topo.die_id, id);  in smp_store_boot_cpu_info()
436 	c->initialized = true;  in smp_store_boot_cpu_info()
448 	if (!c->initialized)  in smp_store_cpu_info()
450 	c->cpu_index = id;  in smp_store_cpu_info()
456 	c->initialized = true;  in smp_store_cpu_info()
462 	int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in topology_same_node()
470 	int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in topology_sane()
473 		"sched: CPU #%d's %s-sibling CPU #%d is not on the same node! "  in topology_sane()
487 		int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in match_smt()
489 		if (c->topo.pkg_id == o->topo.pkg_id &&  in match_smt()
490 		    c->topo.die_id == o->topo.die_id &&  in match_smt()
492 			if (c->topo.core_id == o->topo.core_id)  in match_smt()
495 			if ((c->topo.cu_id != 0xff) &&  in match_smt()
496 			    (o->topo.cu_id != 0xff) &&  in match_smt()
497 			    (c->topo.cu_id == o->topo.cu_id))  in match_smt()
501 	} else if (c->topo.pkg_id == o->topo.pkg_id &&  in match_smt()
502 		   c->topo.die_id == o->topo.die_id &&  in match_smt()
503 		   c->topo.core_id == o->topo.core_id) {  in match_smt()
512 	if (c->topo.pkg_id == o->topo.pkg_id &&  in match_die()
513 	    c->topo.die_id == o->topo.die_id)  in match_die()
520 	int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in match_l2c()
540 	if (c->topo.pkg_id == o->topo.pkg_id)  in match_pkg()
546  * Define intel_cod_cpu[] for Intel COD (Cluster-on-Die) CPUs.
549  * match intel_cod_cpu[] has the SNC (Sub-NUMA Cluster) topology.
552  * by multiple NUMA nodes. The LLC is shared for off-package data
554  * on-package access. CPUID (the source of the information about
569 	int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in match_llc()
570 	bool intel_snc = id && id->driver_data;  in match_llc()
626  * AMD Magny-Cours, Intel Cluster-on-Die, and Intel
627  * Sub-NUMA Clustering have this.
654 	 * since the NUMA domains will auto-magically create the right spanning  in build_sched_topology()
666 	BUG_ON(i >= ARRAY_SIZE(x86_topology)-1);  in build_sched_topology()
687 		c->booted_cores = 1;  in set_cpu_sibling_map()
719 	 * topology_sibling_cpumask links to be set-up.  in set_cpu_sibling_map()
737 					c->booted_cores++;  in set_cpu_sibling_map()
744 			} else if (i != cpu && !c->booted_cores)  in set_cpu_sibling_map()
745 				c->booted_cores = cpu_data(i).booted_cores;  in set_cpu_sibling_map()
750 /* maps the cpu to the sched domain representing multi-core */
778 	pr_debug("Before bogocount - setting activated=1\n");  in impress_friends()
784  * and de-asserting INIT, when starting a remote processor.
788  * Cmdline "init_cpu_udelay=" is available to over-ride this delay.
949 			if (current_node > (-1))  in announce_cpu()
954 			       node_width - num_digits(node), " ", node);  in announce_cpu()
962 		pr_cont("%*s#%d", width - num_digits(cpu), " ", cpu);  in announce_cpu()
991  * NOTE - on most systems this is a PHYSICAL apic ID, but on multiquad
994  * ->wakeup_secondary_cpu.
998 	unsigned long start_ip = real_mode_header->trampoline_start;  in do_boot_cpu()
1002 	/* If 64-bit wakeup method exists, use the 64-bit mode trampoline IP */  in do_boot_cpu()
1003 	if (apic->wakeup_secondary_cpu_64)  in do_boot_cpu()
1004 		start_ip = real_mode_header->trampoline_start64;  in do_boot_cpu()
1006 	idle->thread.sp = (unsigned long)task_pt_regs(idle);  in do_boot_cpu()
1011 		initial_stack  = idle->thread.sp;  in do_boot_cpu()
1044 	 * - Use a method from the APIC driver if one defined, with wakeup  in do_boot_cpu()
1045 	 *   straight to 64-bit mode preferred over wakeup to RM.  in do_boot_cpu()
1047 	 * - Use an INIT boot APIC message  in do_boot_cpu()
1049 	if (apic->wakeup_secondary_cpu_64)  in do_boot_cpu()
1050 		ret = apic->wakeup_secondary_cpu_64(apicid, start_ip);  in do_boot_cpu()
1051 	else if (apic->wakeup_secondary_cpu)  in do_boot_cpu()
1052 		ret = apic->wakeup_secondary_cpu(apicid, start_ip);  in do_boot_cpu()
1064 	u32 apicid = apic->cpu_present_to_apicid(cpu);  in native_kick_ap()
1069 	pr_debug("++++++++++++++++++++=_---CPU UP  %u\n", cpu);  in native_kick_ap()
1074 		return -EINVAL;  in native_kick_ap()
1125  * arch_disable_smp_support() - Disables SMP support for x86 at boottime
1135  * RED-PEN audit/test this more. I bet there is more state messed up here.
1163 		c->cpu_index = nr_cpu_ids;  in smp_cpu_index_default()
1292 static int __initdata setup_possible_cpus = -1;
1303  * are onlined, or offlined. The reason is per-cpu data-structures
1309  * - Ashok Raj
1312  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
1313  * - The user can overwrite it with possible_cpus=NUM
1314  * - Otherwise don't reserve additional CPUs.
1316  * -AK
1323 	if (setup_possible_cpus == -1) {  in prefill_possible_map()
1356 		possible, max_t(int, possible - num_processors, 0));  in prefill_possible_map()
1398 			cpu_data(sibling).booted_cores--;  in remove_siblinginfo()
1419 	c->topo.core_id = 0;  in remove_siblinginfo()
1420 	c->booted_cores = 0;  in remove_siblinginfo()
1494 	unsigned int eax, ebx, ecx, edx;  in mwait_play_dead()  local
1510 	ecx = 0;  in mwait_play_dead()
1511 	native_cpuid(&eax, &ebx, &ecx, &edx);  in mwait_play_dead()
1517 	if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED)) {  in mwait_play_dead()
1528 			(highest_subcstate - 1);  in mwait_play_dead()
1532 	md->status = CPUDEAD_MWAIT_WAIT;  in mwait_play_dead()
1533 	md->control = CPUDEAD_MWAIT_WAIT;  in mwait_play_dead()
1542 		 * The WBINVD is insufficient due to the spurious-wakeup  in mwait_play_dead()
1552 		if (READ_ONCE(md->control) == CPUDEAD_MWAIT_KEXEC_HLT) {  in mwait_play_dead()
1565 			WRITE_ONCE(md->status, CPUDEAD_MWAIT_KEXEC_HLT);  in mwait_play_dead()
1586 		if (READ_ONCE(md->status) != CPUDEAD_MWAIT_WAIT)  in smp_kick_mwait_play_dead()
1590 		for (i = 0; READ_ONCE(md->status) != newstate && i < 1000; i++) {  in smp_kick_mwait_play_dead()
1592 			WRITE_ONCE(md->control, newstate);  in smp_kick_mwait_play_dead()
1596 		if (READ_ONCE(md->status) != newstate)  in smp_kick_mwait_play_dead()
1630 	return -ENOSYS;  in native_cpu_disable()