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1da177e4 LT |
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 | */ | |
1da177e4 LT |
11 | #include <linux/threads.h> |
12 | #include <linux/cpumask.h> | |
13 | #include <linux/string.h> | |
07c7c474 | 14 | #include <linux/module.h> |
1da177e4 LT |
15 | #include <linux/kernel.h> |
16 | #include <linux/ctype.h> | |
17 | #include <linux/init.h> | |
ac23d4ee | 18 | #include <linux/hardirq.h> |
d25ae38b | 19 | #include <linux/dmar.h> |
1da177e4 LT |
20 | |
21 | #include <asm/smp.h> | |
7b6aa335 | 22 | #include <asm/apic.h> |
c1eeb2de | 23 | #include <asm/ipi.h> |
54ac14a8 | 24 | #include <asm/setup.h> |
1da177e4 | 25 | |
be163a15 IM |
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; | |
1da177e4 | 31 | |
be163a15 | 32 | struct apic __read_mostly *apic = &apic_flat; |
7d01d32d | 33 | EXPORT_SYMBOL_GPL(apic); |
1da177e4 | 34 | |
be163a15 | 35 | static struct apic *apic_probe[] __initdata = { |
03b48632 | 36 | #ifdef CONFIG_X86_UV |
1b9b89e7 | 37 | &apic_x2apic_uv_x, |
03b48632 | 38 | #endif |
06cd9a7d | 39 | #ifdef CONFIG_X86_X2APIC |
1b9b89e7 YL |
40 | &apic_x2apic_phys, |
41 | &apic_x2apic_cluster, | |
06cd9a7d | 42 | #endif |
1b9b89e7 YL |
43 | &apic_physflat, |
44 | NULL, | |
45 | }; | |
ae261868 | 46 | |
295594e9 YL |
47 | static int apicid_phys_pkg_id(int initial_apic_id, int index_msb) |
48 | { | |
49 | return hard_smp_processor_id() >> index_msb; | |
50 | } | |
51 | ||
1da177e4 LT |
52 | /* |
53 | * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode. | |
54 | */ | |
72ce0165 | 55 | void __init default_setup_apic_routing(void) |
1da177e4 | 56 | { |
06cd9a7d | 57 | #ifdef CONFIG_X86_X2APIC |
ce69a784 | 58 | if (x2apic_mode |
ef1f87aa | 59 | #ifdef CONFIG_X86_UV |
ce69a784 | 60 | && apic != &apic_x2apic_uv_x |
ef1f87aa | 61 | #endif |
ce69a784 | 62 | ) { |
ef1f87aa SS |
63 | if (x2apic_phys) |
64 | apic = &apic_x2apic_phys; | |
65 | else | |
66 | apic = &apic_x2apic_cluster; | |
d25ae38b | 67 | } |
06cd9a7d | 68 | #endif |
d25ae38b | 69 | |
c8d46cf0 | 70 | if (apic == &apic_flat) { |
2fbd07a5 SS |
71 | switch (boot_cpu_data.x86_vendor) { |
72 | case X86_VENDOR_INTEL: | |
73 | if (num_processors > 8) | |
74 | apic = &apic_physflat; | |
75 | break; | |
76 | case X86_VENDOR_AMD: | |
77 | if (max_physical_apicid >= 8) | |
78 | apic = &apic_physflat; | |
79 | } | |
1b9b89e7 | 80 | } |
9d783ba0 | 81 | |
2fbd07a5 SS |
82 | printk(KERN_INFO "Setting APIC routing to %s\n", apic->name); |
83 | ||
295594e9 YL |
84 | if (is_vsmp_box()) { |
85 | /* need to update phys_pkg_id */ | |
86 | apic->phys_pkg_id = apicid_phys_pkg_id; | |
87 | } | |
88 | ||
9d783ba0 SS |
89 | /* |
90 | * Now that apic routing model is selected, configure the | |
91 | * fault handling for intr remapping. | |
92 | */ | |
93 | if (intr_remapping_enabled) | |
94 | enable_drhd_fault_handling(); | |
1da177e4 LT |
95 | } |
96 | ||
07c7c474 | 97 | /* Same for both flat and physical. */ |
1da177e4 | 98 | |
cff73a6f | 99 | void apic_send_IPI_self(int vector) |
1da177e4 | 100 | { |
dac5f412 | 101 | __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); |
1da177e4 | 102 | } |
ae261868 | 103 | |
306db03b | 104 | int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id) |
ae261868 | 105 | { |
1b9b89e7 YL |
106 | int i; |
107 | ||
108 | for (i = 0; apic_probe[i]; ++i) { | |
109 | if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) { | |
c8d46cf0 | 110 | apic = apic_probe[i]; |
1b9b89e7 | 111 | printk(KERN_INFO "Setting APIC routing to %s.\n", |
c8d46cf0 | 112 | apic->name); |
1b9b89e7 YL |
113 | return 1; |
114 | } | |
ae261868 JS |
115 | } |
116 | return 0; | |
117 | } |