Commit | Line | Data |
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2d9579a1 SS |
1 | #include <linux/threads.h> |
2 | #include <linux/cpumask.h> | |
3 | #include <linux/string.h> | |
4 | #include <linux/kernel.h> | |
5 | #include <linux/ctype.h> | |
6 | #include <linux/init.h> | |
1b9b89e7 YL |
7 | #include <linux/dmar.h> |
8 | ||
2d9579a1 SS |
9 | #include <asm/smp.h> |
10 | #include <asm/ipi.h> | |
11 | #include <asm/genapic.h> | |
12 | ||
1b9b89e7 YL |
13 | static int x2apic_phys; |
14 | ||
15 | static int set_x2apic_phys_mode(char *arg) | |
16 | { | |
17 | x2apic_phys = 1; | |
18 | return 0; | |
19 | } | |
20 | early_param("x2apic_phys", set_x2apic_phys_mode); | |
21 | ||
3cfba089 | 22 | static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id) |
1b9b89e7 | 23 | { |
d25ae38b | 24 | if (cpu_has_x2apic && x2apic_phys) |
1b9b89e7 YL |
25 | return 1; |
26 | ||
27 | return 0; | |
28 | } | |
2d9579a1 SS |
29 | |
30 | /* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */ | |
31 | ||
32 | static cpumask_t x2apic_target_cpus(void) | |
33 | { | |
34 | return cpumask_of_cpu(0); | |
35 | } | |
36 | ||
37 | static cpumask_t x2apic_vector_allocation_domain(int cpu) | |
38 | { | |
39 | cpumask_t domain = CPU_MASK_NONE; | |
40 | cpu_set(cpu, domain); | |
41 | return domain; | |
42 | } | |
43 | ||
44 | static void __x2apic_send_IPI_dest(unsigned int apicid, int vector, | |
45 | unsigned int dest) | |
46 | { | |
47 | unsigned long cfg; | |
48 | ||
49 | cfg = __prepare_ICR(0, vector, dest); | |
50 | ||
51 | /* | |
52 | * send the IPI. | |
53 | */ | |
54 | x2apic_icr_write(cfg, apicid); | |
55 | } | |
56 | ||
57 | static void x2apic_send_IPI_mask(cpumask_t mask, int vector) | |
58 | { | |
59 | unsigned long flags; | |
60 | unsigned long query_cpu; | |
61 | ||
62 | local_irq_save(flags); | |
63 | for_each_cpu_mask(query_cpu, mask) { | |
64 | __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu), | |
65 | vector, APIC_DEST_PHYSICAL); | |
66 | } | |
67 | local_irq_restore(flags); | |
68 | } | |
69 | ||
70 | static void x2apic_send_IPI_allbutself(int vector) | |
71 | { | |
72 | cpumask_t mask = cpu_online_map; | |
73 | ||
74 | cpu_clear(smp_processor_id(), mask); | |
75 | ||
76 | if (!cpus_empty(mask)) | |
77 | x2apic_send_IPI_mask(mask, vector); | |
78 | } | |
79 | ||
80 | static void x2apic_send_IPI_all(int vector) | |
81 | { | |
82 | x2apic_send_IPI_mask(cpu_online_map, vector); | |
83 | } | |
84 | ||
85 | static int x2apic_apic_id_registered(void) | |
86 | { | |
87 | return 1; | |
88 | } | |
89 | ||
90 | static unsigned int x2apic_cpu_mask_to_apicid(cpumask_t cpumask) | |
91 | { | |
92 | int cpu; | |
93 | ||
94 | /* | |
95 | * We're using fixed IRQ delivery, can only return one phys APIC ID. | |
96 | * May as well be the first. | |
97 | */ | |
98 | cpu = first_cpu(cpumask); | |
99 | if ((unsigned)cpu < NR_CPUS) | |
100 | return per_cpu(x86_cpu_to_apicid, cpu); | |
101 | else | |
102 | return BAD_APICID; | |
103 | } | |
104 | ||
f910a9dc YL |
105 | static unsigned int get_apic_id(unsigned long x) |
106 | { | |
107 | unsigned int id; | |
108 | ||
109 | id = x; | |
110 | return id; | |
111 | } | |
112 | ||
113 | static unsigned long set_apic_id(unsigned int id) | |
114 | { | |
115 | unsigned long x; | |
116 | ||
117 | x = id; | |
118 | return x; | |
119 | } | |
120 | ||
2d9579a1 SS |
121 | static unsigned int phys_pkg_id(int index_msb) |
122 | { | |
e17941b0 | 123 | return current_cpu_data.initial_apicid >> index_msb; |
2d9579a1 SS |
124 | } |
125 | ||
126 | void x2apic_send_IPI_self(int vector) | |
127 | { | |
128 | apic_write(APIC_SELF_IPI, vector); | |
129 | } | |
130 | ||
131 | void init_x2apic_ldr(void) | |
132 | { | |
133 | return; | |
134 | } | |
135 | ||
136 | struct genapic apic_x2apic_phys = { | |
137 | .name = "physical x2apic", | |
1b9b89e7 | 138 | .acpi_madt_oem_check = x2apic_acpi_madt_oem_check, |
2d9579a1 SS |
139 | .int_delivery_mode = dest_Fixed, |
140 | .int_dest_mode = (APIC_DEST_PHYSICAL != 0), | |
141 | .target_cpus = x2apic_target_cpus, | |
142 | .vector_allocation_domain = x2apic_vector_allocation_domain, | |
143 | .apic_id_registered = x2apic_apic_id_registered, | |
144 | .init_apic_ldr = init_x2apic_ldr, | |
145 | .send_IPI_all = x2apic_send_IPI_all, | |
146 | .send_IPI_allbutself = x2apic_send_IPI_allbutself, | |
147 | .send_IPI_mask = x2apic_send_IPI_mask, | |
148 | .send_IPI_self = x2apic_send_IPI_self, | |
149 | .cpu_mask_to_apicid = x2apic_cpu_mask_to_apicid, | |
150 | .phys_pkg_id = phys_pkg_id, | |
f910a9dc YL |
151 | .get_apic_id = get_apic_id, |
152 | .set_apic_id = set_apic_id, | |
153 | .apic_id_mask = (0xFFFFFFFFu), | |
2d9579a1 | 154 | }; |