/* * Default generic APIC driver. This handles up to 8 CPUs. * * Copyright 2003 Andi Kleen, SuSE Labs. * Subject to the GNU Public License, v.2 * * Generic x86 APIC driver probe layer. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_HOTPLUG_CPU #define DEFAULT_SEND_IPI (1) #else #define DEFAULT_SEND_IPI (0) #endif int no_broadcast = DEFAULT_SEND_IPI; static __init int no_ipi_broadcast(char *str) { get_option(&str, &no_broadcast); pr_info("Using %s mode\n", no_broadcast ? "No IPI Broadcast" : "IPI Broadcast"); return 1; } __setup("no_ipi_broadcast=", no_ipi_broadcast); static int __init print_ipi_mode(void) { pr_info("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" : "Shortcut"); return 0; } late_initcall(print_ipi_mode); void default_setup_apic_routing(void) { #ifdef CONFIG_X86_IO_APIC printk(KERN_INFO "Enabling APIC mode: Flat. Using %d I/O APICs\n", nr_ioapics); #endif } static void default_vector_allocation_domain(int cpu, struct cpumask *retmask) { /* * Careful. Some cpus do not strictly honor the set of cpus * specified in the interrupt destination when using lowest * priority interrupt delivery mode. * * In particular there was a hyperthreading cpu observed to * deliver interrupts to the wrong hyperthread when only one * hyperthread was specified in the interrupt desitination. */ *retmask = (cpumask_t) { { [0] = APIC_ALL_CPUS } }; } /* should be called last. */ static int probe_default(void) { return 1; } struct apic apic_default = { .name = "default", .probe = probe_default, .acpi_madt_oem_check = NULL, .apic_id_registered = default_apic_id_registered, .irq_delivery_mode = dest_LowestPrio, /* logical delivery broadcast to all CPUs: */ .irq_dest_mode = 1, .target_cpus = default_target_cpus, .disable_esr = 0, .dest_logical = APIC_DEST_LOGICAL, .check_apicid_used = default_check_apicid_used, .check_apicid_present = default_check_apicid_present, .vector_allocation_domain = default_vector_allocation_domain, .init_apic_ldr = default_init_apic_ldr, .ioapic_phys_id_map = default_ioapic_phys_id_map, .setup_apic_routing = default_setup_apic_routing, .multi_timer_check = NULL, .apicid_to_node = default_apicid_to_node, .cpu_to_logical_apicid = default_cpu_to_logical_apicid, .cpu_present_to_apicid = default_cpu_present_to_apicid, .apicid_to_cpu_present = default_apicid_to_cpu_present, .setup_portio_remap = NULL, .check_phys_apicid_present = default_check_phys_apicid_present, .enable_apic_mode = NULL, .phys_pkg_id = default_phys_pkg_id, .mps_oem_check = NULL, .get_apic_id = default_get_apic_id, .set_apic_id = NULL, .apic_id_mask = 0x0F << 24, .cpu_mask_to_apicid = default_cpu_mask_to_apicid, .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and, .send_IPI_mask = default_send_IPI_mask_logical, .send_IPI_mask_allbutself = default_send_IPI_mask_allbutself_logical, .send_IPI_allbutself = default_send_IPI_allbutself, .send_IPI_all = default_send_IPI_all, .send_IPI_self = default_send_IPI_self, .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW, .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH, .wait_for_init_deassert = default_wait_for_init_deassert, .smp_callin_clear_local_apic = NULL, .inquire_remote_apic = default_inquire_remote_apic, .read = native_apic_mem_read, .write = native_apic_mem_write, .icr_read = native_apic_icr_read, .icr_write = native_apic_icr_write, .wait_icr_idle = native_apic_wait_icr_idle, .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, }; extern struct apic apic_numaq; extern struct apic apic_summit; extern struct apic apic_bigsmp; extern struct apic apic_es7000; extern struct apic apic_es7000_cluster; extern struct apic apic_default; struct apic *apic = &apic_default; EXPORT_SYMBOL_GPL(apic); static struct apic *apic_probe[] __initdata = { #ifdef CONFIG_X86_NUMAQ &apic_numaq, #endif #ifdef CONFIG_X86_SUMMIT &apic_summit, #endif #ifdef CONFIG_X86_BIGSMP &apic_bigsmp, #endif #ifdef CONFIG_X86_ES7000 &apic_es7000, &apic_es7000_cluster, #endif &apic_default, /* must be last */ NULL, }; static int cmdline_apic __initdata; static int __init parse_apic(char *arg) { int i; if (!arg) return -EINVAL; for (i = 0; apic_probe[i]; i++) { if (!strcmp(apic_probe[i]->name, arg)) { apic = apic_probe[i]; cmdline_apic = 1; return 0; } } /* Parsed again by __setup for debug/verbose */ return 0; } early_param("apic", parse_apic); void __init generic_bigsmp_probe(void) { #ifdef CONFIG_X86_BIGSMP /* * This routine is used to switch to bigsmp mode when * - There is no apic= option specified by the user * - generic_apic_probe() has chosen apic_default as the sub_arch * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support */ if (!cmdline_apic && apic == &apic_default) { if (apic_bigsmp.probe()) { apic = &apic_bigsmp; printk(KERN_INFO "Overriding APIC driver with %s\n", apic->name); } } #endif } void __init generic_apic_probe(void) { if (!cmdline_apic) { int i; for (i = 0; apic_probe[i]; i++) { if (apic_probe[i]->probe()) { apic = apic_probe[i]; break; } } /* Not visible without early console */ if (!apic_probe[i]) panic("Didn't find an APIC driver"); } printk(KERN_INFO "Using APIC driver %s\n", apic->name); } /* These functions can switch the APIC even after the initial ->probe() */ int __init generic_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid) { int i; for (i = 0; apic_probe[i]; ++i) { if (!apic_probe[i]->mps_oem_check) continue; if (!apic_probe[i]->mps_oem_check(mpc, oem, productid)) continue; if (!cmdline_apic) { apic = apic_probe[i]; printk(KERN_INFO "Switched to APIC driver `%s'.\n", apic->name); } return 1; } return 0; } int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id) { int i; for (i = 0; apic_probe[i]; ++i) { if (!apic_probe[i]->acpi_madt_oem_check) continue; if (!apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) continue; if (!cmdline_apic) { apic = apic_probe[i]; printk(KERN_INFO "Switched to APIC driver `%s'.\n", apic->name); } return 1; } return 0; }