Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / arch / x86 / kernel / apic / probe_64.c
1 /*
2  * Copyright 2004 James Cleverdon, IBM.
3  * Subject to the GNU Public License, v.2
4  *
5  * Generic APIC sub-arch probe layer.
6  *
7  * Hacked for x86-64 by James Cleverdon from i386 architecture code by
8  * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
9  * James Cleverdon.
10  */
11 #include <linux/threads.h>
12 #include <linux/cpumask.h>
13 #include <linux/string.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/ctype.h>
17 #include <linux/init.h>
18 #include <linux/hardirq.h>
19 #include <linux/dmar.h>
20
21 #include <asm/smp.h>
22 #include <asm/apic.h>
23 #include <asm/ipi.h>
24 #include <asm/setup.h>
25
26 extern struct apic apic_flat;
27 extern struct apic apic_physflat;
28 extern struct apic apic_x2xpic_uv_x;
29 extern struct apic apic_x2apic_phys;
30 extern struct apic apic_x2apic_cluster;
31
32 struct apic __read_mostly *apic = &apic_flat;
33 EXPORT_SYMBOL_GPL(apic);
34
35 static struct apic *apic_probe[] __initdata = {
36 #ifdef CONFIG_X86_UV
37         &apic_x2apic_uv_x,
38 #endif
39 #ifdef CONFIG_X86_X2APIC
40         &apic_x2apic_phys,
41         &apic_x2apic_cluster,
42 #endif
43         &apic_physflat,
44         NULL,
45 };
46
47 /*
48  * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
49  */
50 void __init default_setup_apic_routing(void)
51 {
52 #ifdef CONFIG_X86_X2APIC
53         if (x2apic && (apic != &apic_x2apic_phys &&
54 #ifdef CONFIG_X86_UV
55                        apic != &apic_x2apic_uv_x &&
56 #endif
57                        apic != &apic_x2apic_cluster)) {
58                 if (x2apic_phys)
59                         apic = &apic_x2apic_phys;
60                 else
61                         apic = &apic_x2apic_cluster;
62                 printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);
63         }
64 #endif
65
66         if (apic == &apic_flat) {
67                 if (max_physical_apicid >= 8)
68                         apic = &apic_physflat;
69                 printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);
70         }
71
72         /*
73          * Now that apic routing model is selected, configure the
74          * fault handling for intr remapping.
75          */
76         if (intr_remapping_enabled)
77                 enable_drhd_fault_handling();
78 }
79
80 /* Same for both flat and physical. */
81
82 void apic_send_IPI_self(int vector)
83 {
84         __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
85 }
86
87 int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
88 {
89         int i;
90
91         for (i = 0; apic_probe[i]; ++i) {
92                 if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) {
93                         apic = apic_probe[i];
94                         printk(KERN_INFO "Setting APIC routing to %s.\n",
95                                 apic->name);
96                         return 1;
97                 }
98         }
99         return 0;
100 }