1 // SPDX-License-Identifier: GPL-2.0-or-later
9  *	Much of the core SMP work is based on previous work by Thomas Radke, to
13  *	Pentium Pro and Pentium-II/Xeon MP machines.
19  *		Alan Cox	:	By repeated request 8) - Total BogoMIPS report.
26  *		Ingo Molnar	:	Added APIC timers, based on code
32  *		Martin J. Bligh	: 	Added support for multi-quad systems
86 #include <asm/intel-family.h>
88 #include <asm/spec-ctrl.h>
92 #include <asm/spec-ctrl.h>
164 	if (!--smpboot_warm_reset_vector_count) {  in smpboot_restore_warm_reset_vector()
242 	 * 32-bit specific. 64-bit reaches this code with the correct page  in start_secondary()
273 	 * synchronization state to ALIVE and spin-waits for the control CPU to  in start_secondary()
322 	int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in topology_same_node()
330 	int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in topology_sane()
333 		"sched: CPU #%d's %s-sibling CPU #%d is not on the same node! "  in topology_sane()
347 		int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in match_smt()
349 		if (c->topo.pkg_id == o->topo.pkg_id &&  in match_smt()
350 		    c->topo.die_id == o->topo.die_id &&  in match_smt()
351 		    c->topo.amd_node_id == o->topo.amd_node_id &&  in match_smt()
353 			if (c->topo.core_id == o->topo.core_id)  in match_smt()
356 			if ((c->topo.cu_id != 0xff) &&  in match_smt()
357 			    (o->topo.cu_id != 0xff) &&  in match_smt()
358 			    (c->topo.cu_id == o->topo.cu_id))  in match_smt()
362 	} else if (c->topo.pkg_id == o->topo.pkg_id &&  in match_smt()
363 		   c->topo.die_id == o->topo.die_id &&  in match_smt()
364 		   c->topo.core_id == o->topo.core_id) {  in match_smt()
373 	if (c->topo.pkg_id != o->topo.pkg_id || c->topo.die_id != o->topo.die_id)  in match_die()
377 		return c->topo.amd_node_id == o->topo.amd_node_id;  in match_die()
384 	int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in match_l2c()
404 	if (c->topo.pkg_id == o->topo.pkg_id)  in match_pkg()
410  * Define intel_cod_cpu[] for Intel COD (Cluster-on-Die) CPUs.
413  * match intel_cod_cpu[] has the SNC (Sub-NUMA Cluster) topology.
416  * by multiple NUMA nodes. The LLC is shared for off-package data
418  * on-package access. CPUID (the source of the information about
433 	int cpu1 = c->cpu_index, cpu2 = o->cpu_index;  in match_llc()
434 	bool intel_snc = id && id->driver_data;  in match_llc()
476  * AMD Magny-Cours, Intel Cluster-on-Die, and Intel
477  * Sub-NUMA Clustering have this.
499 	 * PKG domain since the NUMA domains will auto-magically create the  in build_sched_topology()
500 	 * right spanning domains based on the SLIT.  in build_sched_topology()
503 		unsigned int pkgdom = ARRAY_SIZE(x86_topology) - 2;  in build_sched_topology()
509 	 * Drop the SMT domains if there is only one thread per-core  in build_sched_topology()
534 		c->booted_cores = 1;  in set_cpu_sibling_map()
566 	 * topology_sibling_cpumask links to be set-up.  in set_cpu_sibling_map()
584 					c->booted_cores++;  in set_cpu_sibling_map()
591 			} else if (i != cpu && !c->booted_cores)  in set_cpu_sibling_map()
592 				c->booted_cores = cpu_data(i).booted_cores;  in set_cpu_sibling_map()
597 /* maps the cpu to the sched domain representing multi-core */
625 	pr_debug("Before bogocount - setting activated=1\n");  in impress_friends()
631  * and de-asserting INIT, when starting a remote processor.
709 	 * Determine this based on the APIC version.  in wakeup_secondary_cpu_via_init()
795 			if (current_node > (-1))  in announce_cpu()
800 			       node_width - num_digits(node), " ", node);  in announce_cpu()
808 		pr_cont("%*s#%d", width - num_digits(cpu), " ", cpu);  in announce_cpu()
837  * NOTE - on most systems this is a PHYSICAL apic ID, but on multiquad
840  * ->wakeup_secondary_cpu.
844 	unsigned long start_ip = real_mode_header->trampoline_start;  in do_boot_cpu()
848 	/* If 64-bit wakeup method exists, use the 64-bit mode trampoline IP */  in do_boot_cpu()
849 	if (apic->wakeup_secondary_cpu_64)  in do_boot_cpu()
850 		start_ip = real_mode_header->trampoline_start64;  in do_boot_cpu()
852 	idle->thread.sp = (unsigned long)task_pt_regs(idle);  in do_boot_cpu()
857 		initial_stack  = idle->thread.sp;  in do_boot_cpu()
890 	 * - Use a method from the APIC driver if one defined, with wakeup  in do_boot_cpu()
891 	 *   straight to 64-bit mode preferred over wakeup to RM.  in do_boot_cpu()
893 	 * - Use an INIT boot APIC message  in do_boot_cpu()
895 	if (apic->wakeup_secondary_cpu_64)  in do_boot_cpu()
896 		ret = apic->wakeup_secondary_cpu_64(apicid, start_ip, cpu);  in do_boot_cpu()
897 	else if (apic->wakeup_secondary_cpu)  in do_boot_cpu()
898 		ret = apic->wakeup_secondary_cpu(apicid, start_ip, cpu);  in do_boot_cpu()
910 	u32 apicid = apic->cpu_present_to_apicid(cpu);  in native_kick_ap()
915 	pr_debug("++++++++++++++++++++=_---CPU UP  %u\n", cpu);  in native_kick_ap()
919 		return -EINVAL;  in native_kick_ap()
924 		return -EINVAL;  in native_kick_ap()
929 	 * (e.g. by the ACPI SMI) to initialize new CPUs with MTRRs in sync:  in native_kick_ap()
975  * arch_disable_smp_support() - Disables SMP support for x86 at boottime
985  * RED-PEN audit/test this more. I bet there is more state messed up here.
1149 			cpu_data(sibling).booted_cores--;  in remove_siblinginfo()
1170 	c->topo.core_id = 0;  in remove_siblinginfo()
1171 	c->booted_cores = 0;  in remove_siblinginfo()
1189 	 * Stop allowing kernel-mode FPU. This is needed so that if the CPU is  in cpu_disable_common()
1214          * it. It still responds normally to INIT, NMI, SMI, and SIPI  in native_cpu_disable()
1253 	md->status = CPUDEAD_MWAIT_WAIT;  in mwait_play_dead()
1254 	md->control = CPUDEAD_MWAIT_WAIT;  in mwait_play_dead()
1263 		 * The WBINVD is insufficient due to the spurious-wakeup  in mwait_play_dead()
1273 		if (READ_ONCE(md->control) == CPUDEAD_MWAIT_KEXEC_HLT) {  in mwait_play_dead()
1282 			 * SMI. They will resume execution at the instruction  in mwait_play_dead()
1286 			WRITE_ONCE(md->status, CPUDEAD_MWAIT_KEXEC_HLT);  in mwait_play_dead()
1307 		if (READ_ONCE(md->status) != CPUDEAD_MWAIT_WAIT)  in smp_kick_mwait_play_dead()
1311 		for (i = 0; READ_ONCE(md->status) != newstate && i < 1000; i++) {  in smp_kick_mwait_play_dead()
1313 			WRITE_ONCE(md->control, newstate);  in smp_kick_mwait_play_dead()
1317 		if (READ_ONCE(md->status) != newstate)  in smp_kick_mwait_play_dead()
1351 	return -ENOSYS;  in native_cpu_disable()