Commit | Line | Data |
---|---|---|
12a67cf6 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 | ||
12a67cf6 SS |
9 | #include <asm/smp.h> |
10 | #include <asm/ipi.h> | |
11 | #include <asm/genapic.h> | |
12 | ||
13 | DEFINE_PER_CPU(u32, x86_cpu_to_logical_apicid); | |
14 | ||
1b9b89e7 YL |
15 | static int __init x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id) |
16 | { | |
d25ae38b | 17 | if (cpu_has_x2apic) |
1b9b89e7 YL |
18 | return 1; |
19 | ||
20 | return 0; | |
21 | } | |
22 | ||
12a67cf6 SS |
23 | /* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */ |
24 | ||
25 | static cpumask_t x2apic_target_cpus(void) | |
26 | { | |
27 | return cpumask_of_cpu(0); | |
28 | } | |
29 | ||
30 | /* | |
31 | * for now each logical cpu is in its own vector allocation domain. | |
32 | */ | |
33 | static cpumask_t x2apic_vector_allocation_domain(int cpu) | |
34 | { | |
35 | cpumask_t domain = CPU_MASK_NONE; | |
36 | cpu_set(cpu, domain); | |
37 | return domain; | |
38 | } | |
39 | ||
40 | static void __x2apic_send_IPI_dest(unsigned int apicid, int vector, | |
41 | unsigned int dest) | |
42 | { | |
43 | unsigned long cfg; | |
44 | ||
45 | cfg = __prepare_ICR(0, vector, dest); | |
46 | ||
47 | /* | |
48 | * send the IPI. | |
49 | */ | |
50 | x2apic_icr_write(cfg, apicid); | |
51 | } | |
52 | ||
53 | /* | |
54 | * for now, we send the IPI's one by one in the cpumask. | |
55 | * TBD: Based on the cpu mask, we can send the IPI's to the cluster group | |
56 | * at once. We have 16 cpu's in a cluster. This will minimize IPI register | |
57 | * writes. | |
58 | */ | |
59 | static void x2apic_send_IPI_mask(cpumask_t mask, int vector) | |
60 | { | |
61 | unsigned long flags; | |
62 | unsigned long query_cpu; | |
63 | ||
64 | local_irq_save(flags); | |
65 | for_each_cpu_mask(query_cpu, mask) { | |
66 | __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_logical_apicid, query_cpu), | |
67 | vector, APIC_DEST_LOGICAL); | |
68 | } | |
69 | local_irq_restore(flags); | |
70 | } | |
71 | ||
72 | static void x2apic_send_IPI_allbutself(int vector) | |
73 | { | |
74 | cpumask_t mask = cpu_online_map; | |
75 | ||
76 | cpu_clear(smp_processor_id(), mask); | |
77 | ||
78 | if (!cpus_empty(mask)) | |
79 | x2apic_send_IPI_mask(mask, vector); | |
80 | } | |
81 | ||
82 | static void x2apic_send_IPI_all(int vector) | |
83 | { | |
84 | x2apic_send_IPI_mask(cpu_online_map, vector); | |
85 | } | |
86 | ||
87 | static int x2apic_apic_id_registered(void) | |
88 | { | |
89 | return 1; | |
90 | } | |
91 | ||
92 | static unsigned int x2apic_cpu_mask_to_apicid(cpumask_t cpumask) | |
93 | { | |
94 | int cpu; | |
95 | ||
96 | /* | |
97 | * We're using fixed IRQ delivery, can only return one phys APIC ID. | |
98 | * May as well be the first. | |
99 | */ | |
100 | cpu = first_cpu(cpumask); | |
101 | if ((unsigned)cpu < NR_CPUS) | |
102 | return per_cpu(x86_cpu_to_logical_apicid, cpu); | |
103 | else | |
104 | return BAD_APICID; | |
105 | } | |
106 | ||
f910a9dc YL |
107 | static unsigned int get_apic_id(unsigned long x) |
108 | { | |
109 | unsigned int id; | |
110 | ||
111 | id = x; | |
112 | return id; | |
113 | } | |
114 | ||
115 | static unsigned long set_apic_id(unsigned int id) | |
116 | { | |
117 | unsigned long x; | |
118 | ||
119 | x = id; | |
120 | return x; | |
121 | } | |
122 | ||
12a67cf6 SS |
123 | static unsigned int phys_pkg_id(int index_msb) |
124 | { | |
e17941b0 | 125 | return current_cpu_data.initial_apicid >> index_msb; |
12a67cf6 SS |
126 | } |
127 | ||
128 | static void x2apic_send_IPI_self(int vector) | |
129 | { | |
130 | apic_write(APIC_SELF_IPI, vector); | |
131 | } | |
132 | ||
133 | static void init_x2apic_ldr(void) | |
134 | { | |
135 | int cpu = smp_processor_id(); | |
136 | ||
137 | per_cpu(x86_cpu_to_logical_apicid, cpu) = apic_read(APIC_LDR); | |
138 | return; | |
139 | } | |
140 | ||
141 | struct genapic apic_x2apic_cluster = { | |
142 | .name = "cluster x2apic", | |
1b9b89e7 | 143 | .acpi_madt_oem_check = x2apic_acpi_madt_oem_check, |
12a67cf6 SS |
144 | .int_delivery_mode = dest_LowestPrio, |
145 | .int_dest_mode = (APIC_DEST_LOGICAL != 0), | |
146 | .target_cpus = x2apic_target_cpus, | |
147 | .vector_allocation_domain = x2apic_vector_allocation_domain, | |
148 | .apic_id_registered = x2apic_apic_id_registered, | |
149 | .init_apic_ldr = init_x2apic_ldr, | |
150 | .send_IPI_all = x2apic_send_IPI_all, | |
151 | .send_IPI_allbutself = x2apic_send_IPI_allbutself, | |
152 | .send_IPI_mask = x2apic_send_IPI_mask, | |
153 | .send_IPI_self = x2apic_send_IPI_self, | |
154 | .cpu_mask_to_apicid = x2apic_cpu_mask_to_apicid, | |
155 | .phys_pkg_id = phys_pkg_id, | |
f910a9dc YL |
156 | .get_apic_id = get_apic_id, |
157 | .set_apic_id = set_apic_id, | |
158 | .apic_id_mask = (0xFFFFFFFFu), | |
12a67cf6 | 159 | }; |