arch/x86/kernel/probe_32.c

   1 /*
   2  * Default generic APIC driver. This handles up to 8 CPUs.
   3  *
   4  * Copyright 2003 Andi Kleen, SuSE Labs.
   5  * Subject to the GNU Public License, v.2
   6  *
   7  * Generic x86 APIC driver probe layer.
   8  */
   9 #include <linux/threads.h>
  10 #include <linux/cpumask.h>
  11 #include <linux/string.h>
  12 #include <linux/kernel.h>
  13 #include <linux/ctype.h>
  14 #include <linux/init.h>
  15 #include <linux/errno.h>
  16 #include <asm/fixmap.h>
  17 #include <asm/mpspec.h>
  18 #include <asm/apicdef.h>
  19 #include <asm/genapic.h>
  20 #include <asm/setup.h>
  21
  22 #include <linux/threads.h>
  23 #include <linux/cpumask.h>
  24 #include <asm/mpspec.h>
  25 #include <asm/genapic.h>
  26 #include <asm/fixmap.h>
  27 #include <asm/apicdef.h>
  28 #include <linux/kernel.h>
  29 #include <linux/string.h>
  30 #include <linux/smp.h>
  31 #include <linux/init.h>
  32 #include <asm/genapic.h>
  33 #include <asm/ipi.h>
  34
  35 static void default_vector_allocation_domain(int cpu, struct cpumask *retmask)
  36 {
  37         /*
  38          * Careful. Some cpus do not strictly honor the set of cpus
  39          * specified in the interrupt destination when using lowest
  40          * priority interrupt delivery mode.
  41          *
  42          * In particular there was a hyperthreading cpu observed to
  43          * deliver interrupts to the wrong hyperthread when only one
  44          * hyperthread was specified in the interrupt desitination.
  45          */
  46         *retmask = (cpumask_t) { { [0] = APIC_ALL_CPUS } };
  47 }
  48
  49 /* should be called last. */
  50 static int probe_default(void)
  51 {
  52         return 1;
  53 }
  54
  55 struct genapic apic_default = {
  56
  57         .name                           = "default",
  58         .probe                          = probe_default,
  59         .acpi_madt_oem_check            = NULL,
  60         .apic_id_registered             = default_apic_id_registered,
  61
  62         .irq_delivery_mode              = dest_LowestPrio,
  63         /* logical delivery broadcast to all CPUs: */
  64         .irq_dest_mode                  = 1,
  65
  66         .target_cpus                    = default_target_cpus,
  67         .disable_esr                    = 0,
  68         .dest_logical                   = APIC_DEST_LOGICAL,
  69         .check_apicid_used              = default_check_apicid_used,
  70         .check_apicid_present           = default_check_apicid_present,
  71
  72         .vector_allocation_domain       = default_vector_allocation_domain,
  73         .init_apic_ldr                  = default_init_apic_ldr,
  74
  75         .ioapic_phys_id_map             = default_ioapic_phys_id_map,
  76         .setup_apic_routing             = default_setup_apic_routing,
  77         .multi_timer_check              = NULL,
  78         .apicid_to_node                 = default_apicid_to_node,
  79         .cpu_to_logical_apicid          = default_cpu_to_logical_apicid,
  80         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
  81         .apicid_to_cpu_present          = default_apicid_to_cpu_present,
  82         .setup_portio_remap             = NULL,
  83         .check_phys_apicid_present      = default_check_phys_apicid_present,
  84         .enable_apic_mode               = NULL,
  85         .phys_pkg_id                    = default_phys_pkg_id,
  86         .mps_oem_check                  = NULL,
  87
  88         .get_apic_id                    = default_get_apic_id,
  89         .set_apic_id                    = NULL,
  90         .apic_id_mask                   = 0x0F << 24,
  91
  92         .cpu_mask_to_apicid             = default_cpu_mask_to_apicid,
  93         .cpu_mask_to_apicid_and         = default_cpu_mask_to_apicid_and,
  94
  95         .send_IPI_mask                  = default_send_IPI_mask,
  96         .send_IPI_mask_allbutself       = NULL,
  97         .send_IPI_allbutself            = default_send_IPI_allbutself,
  98         .send_IPI_all                   = default_send_IPI_all,
  99         .send_IPI_self                  = NULL,
 100
 101         .wakeup_cpu                     = NULL,
 102         .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
 103         .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
 104
 105         .wait_for_init_deassert         = default_wait_for_init_deassert,
 106
 107         .smp_callin_clear_local_apic    = NULL,
 108         .store_NMI_vector               = NULL,
 109         .inquire_remote_apic            = default_inquire_remote_apic,
 110 };
 111
 112 extern struct genapic apic_numaq;
 113 extern struct genapic apic_summit;
 114 extern struct genapic apic_bigsmp;
 115 extern struct genapic apic_es7000;
 116 extern struct genapic apic_default;
 117
 118 struct genapic *apic = &apic_default;
 119
 120 static struct genapic *apic_probe[] __initdata = {
 121 #ifdef CONFIG_X86_NUMAQ
 122         &apic_numaq,
 123 #endif
 124 #ifdef CONFIG_X86_SUMMIT
 125         &apic_summit,
 126 #endif
 127 #ifdef CONFIG_X86_BIGSMP
 128         &apic_bigsmp,
 129 #endif
 130 #ifdef CONFIG_X86_ES7000
 131         &apic_es7000,
 132 #endif
 133         &apic_default,  /* must be last */
 134         NULL,
 135 };
 136
 137 static int cmdline_apic __initdata;
 138 static int __init parse_apic(char *arg)
 139 {
 140         int i;
 141
 142         if (!arg)
 143                 return -EINVAL;
 144
 145         for (i = 0; apic_probe[i]; i++) {
 146                 if (!strcmp(apic_probe[i]->name, arg)) {
 147                         apic = apic_probe[i];
 148                         cmdline_apic = 1;
 149                         return 0;
 150                 }
 151         }
 152
 153         if (x86_quirks->update_genapic)
 154                 x86_quirks->update_genapic();
 155
 156         /* Parsed again by __setup for debug/verbose */
 157         return 0;
 158 }
 159 early_param("apic", parse_apic);
 160
 161 void __init generic_bigsmp_probe(void)
 162 {
 163 #ifdef CONFIG_X86_BIGSMP
 164         /*
 165          * This routine is used to switch to bigsmp mode when
 166          * - There is no apic= option specified by the user
 167          * - generic_apic_probe() has chosen apic_default as the sub_arch
 168          * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
 169          */
 170
 171         if (!cmdline_apic && apic == &apic_default) {
 172                 if (apic_bigsmp.probe()) {
 173                         apic = &apic_bigsmp;
 174                         if (x86_quirks->update_genapic)
 175                                 x86_quirks->update_genapic();
 176                         printk(KERN_INFO "Overriding APIC driver with %s\n",
 177                                apic->name);
 178                 }
 179         }
 180 #endif
 181 }
 182
 183 void __init generic_apic_probe(void)
 184 {
 185         if (!cmdline_apic) {
 186                 int i;
 187                 for (i = 0; apic_probe[i]; i++) {
 188                         if (apic_probe[i]->probe()) {
 189                                 apic = apic_probe[i];
 190                                 break;
 191                         }
 192                 }
 193                 /* Not visible without early console */
 194                 if (!apic_probe[i])
 195                         panic("Didn't find an APIC driver");
 196
 197                 if (x86_quirks->update_genapic)
 198                         x86_quirks->update_genapic();
 199         }
 200         printk(KERN_INFO "Using APIC driver %s\n", apic->name);
 201 }
 202
 203 /* These functions can switch the APIC even after the initial ->probe() */
 204
 205 int __init
 206 generic_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
 207 {
 208         int i;
 209
 210         for (i = 0; apic_probe[i]; ++i) {
 211                 if (!apic_probe[i]->mps_oem_check)
 212                         continue;
 213                 if (!apic_probe[i]->mps_oem_check(mpc, oem, productid))
 214                         continue;
 215
 216                 if (!cmdline_apic) {
 217                         apic = apic_probe[i];
 218                         if (x86_quirks->update_genapic)
 219                                 x86_quirks->update_genapic();
 220                         printk(KERN_INFO "Switched to APIC driver `%s'.\n",
 221                                apic->name);
 222                 }
 223                 return 1;
 224         }
 225         return 0;
 226 }
 227
 228 int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 229 {
 230         int i;
 231
 232         for (i = 0; apic_probe[i]; ++i) {
 233                 if (!apic_probe[i]->acpi_madt_oem_check)
 234                         continue;
 235                 if (!apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id))
 236                         continue;
 237
 238                 if (!cmdline_apic) {
 239                         apic = apic_probe[i];
 240                         if (x86_quirks->update_genapic)
 241                                 x86_quirks->update_genapic();
 242                         printk(KERN_INFO "Switched to APIC driver `%s'.\n",
 243                                apic->name);
 244                 }
 245                 return 1;
 246         }
 247         return 0;
 248 }