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>
7 #include <linux/dmar.h>
11 #include <asm/genapic.h>
13 DEFINE_PER_CPU(u32
, x86_cpu_to_logical_apicid
);
15 static int x2apic_acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
23 /* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */
25 static const struct cpumask
*x2apic_target_cpus(void)
31 * for now each logical cpu is in its own vector allocation domain.
33 static void x2apic_vector_allocation_domain(int cpu
, struct cpumask
*retmask
)
35 cpumask_clear(retmask
);
36 cpumask_set_cpu(cpu
, retmask
);
40 __x2apic_send_IPI_dest(unsigned int apicid
, int vector
, unsigned int dest
)
44 cfg
= __prepare_ICR(0, vector
, dest
);
49 x2apic_icr_write(cfg
, apicid
);
53 * for now, we send the IPI's one by one in the cpumask.
54 * TBD: Based on the cpu mask, we can send the IPI's to the cluster group
55 * at once. We have 16 cpu's in a cluster. This will minimize IPI register
58 static void x2apic_send_IPI_mask(const struct cpumask
*mask
, int vector
)
60 unsigned long query_cpu
;
63 local_irq_save(flags
);
64 for_each_cpu(query_cpu
, mask
) {
65 __x2apic_send_IPI_dest(
66 per_cpu(x86_cpu_to_logical_apicid
, query_cpu
),
67 vector
, apic
->dest_logical
);
69 local_irq_restore(flags
);
73 x2apic_send_IPI_mask_allbutself(const struct cpumask
*mask
, int vector
)
75 unsigned long this_cpu
= smp_processor_id();
76 unsigned long query_cpu
;
79 local_irq_save(flags
);
80 for_each_cpu(query_cpu
, mask
) {
81 if (query_cpu
== this_cpu
)
83 __x2apic_send_IPI_dest(
84 per_cpu(x86_cpu_to_logical_apicid
, query_cpu
),
85 vector
, apic
->dest_logical
);
87 local_irq_restore(flags
);
90 static void x2apic_send_IPI_allbutself(int vector
)
92 unsigned long this_cpu
= smp_processor_id();
93 unsigned long query_cpu
;
96 local_irq_save(flags
);
97 for_each_online_cpu(query_cpu
) {
98 if (query_cpu
== this_cpu
)
100 __x2apic_send_IPI_dest(
101 per_cpu(x86_cpu_to_logical_apicid
, query_cpu
),
102 vector
, apic
->dest_logical
);
104 local_irq_restore(flags
);
107 static void x2apic_send_IPI_all(int vector
)
109 x2apic_send_IPI_mask(cpu_online_mask
, vector
);
112 static int x2apic_apic_id_registered(void)
117 static unsigned int x2apic_cpu_mask_to_apicid(const struct cpumask
*cpumask
)
120 * We're using fixed IRQ delivery, can only return one logical APIC ID.
121 * May as well be the first.
123 int cpu
= cpumask_first(cpumask
);
125 if ((unsigned)cpu
< nr_cpu_ids
)
126 return per_cpu(x86_cpu_to_logical_apicid
, cpu
);
132 x2apic_cpu_mask_to_apicid_and(const struct cpumask
*cpumask
,
133 const struct cpumask
*andmask
)
138 * We're using fixed IRQ delivery, can only return one logical APIC ID.
139 * May as well be the first.
141 for_each_cpu_and(cpu
, cpumask
, andmask
) {
142 if (cpumask_test_cpu(cpu
, cpu_online_mask
))
146 if (cpu
< nr_cpu_ids
)
147 return per_cpu(x86_cpu_to_logical_apicid
, cpu
);
152 static unsigned int x2apic_cluster_phys_get_apic_id(unsigned long x
)
160 static unsigned long set_apic_id(unsigned int id
)
168 static int x2apic_cluster_phys_pkg_id(int initial_apicid
, int index_msb
)
170 return current_cpu_data
.initial_apicid
>> index_msb
;
173 static void x2apic_send_IPI_self(int vector
)
175 apic_write(APIC_SELF_IPI
, vector
);
178 static void init_x2apic_ldr(void)
180 int cpu
= smp_processor_id();
182 per_cpu(x86_cpu_to_logical_apicid
, cpu
) = apic_read(APIC_LDR
);
185 struct genapic apic_x2apic_cluster
= {
187 .name
= "cluster x2apic",
189 .acpi_madt_oem_check
= x2apic_acpi_madt_oem_check
,
190 .apic_id_registered
= x2apic_apic_id_registered
,
192 .irq_delivery_mode
= dest_LowestPrio
,
193 .irq_dest_mode
= 1, /* logical */
195 .target_cpus
= x2apic_target_cpus
,
197 .dest_logical
= APIC_DEST_LOGICAL
,
198 .check_apicid_used
= NULL
,
199 .check_apicid_present
= NULL
,
201 .vector_allocation_domain
= x2apic_vector_allocation_domain
,
202 .init_apic_ldr
= init_x2apic_ldr
,
204 .ioapic_phys_id_map
= NULL
,
205 .setup_apic_routing
= NULL
,
206 .multi_timer_check
= NULL
,
207 .apicid_to_node
= NULL
,
208 .cpu_to_logical_apicid
= NULL
,
209 .cpu_present_to_apicid
= default_cpu_present_to_apicid
,
210 .apicid_to_cpu_present
= NULL
,
211 .setup_portio_remap
= NULL
,
212 .check_phys_apicid_present
= default_check_phys_apicid_present
,
213 .enable_apic_mode
= NULL
,
214 .phys_pkg_id
= x2apic_cluster_phys_pkg_id
,
215 .mps_oem_check
= NULL
,
217 .get_apic_id
= x2apic_cluster_phys_get_apic_id
,
218 .set_apic_id
= set_apic_id
,
219 .apic_id_mask
= 0xFFFFFFFFu
,
221 .cpu_mask_to_apicid
= x2apic_cpu_mask_to_apicid
,
222 .cpu_mask_to_apicid_and
= x2apic_cpu_mask_to_apicid_and
,
224 .send_IPI_mask
= x2apic_send_IPI_mask
,
225 .send_IPI_mask_allbutself
= x2apic_send_IPI_mask_allbutself
,
226 .send_IPI_allbutself
= x2apic_send_IPI_allbutself
,
227 .send_IPI_all
= x2apic_send_IPI_all
,
228 .send_IPI_self
= x2apic_send_IPI_self
,
231 .trampoline_phys_low
= DEFAULT_TRAMPOLINE_PHYS_LOW
,
232 .trampoline_phys_high
= DEFAULT_TRAMPOLINE_PHYS_HIGH
,
233 .wait_for_init_deassert
= NULL
,
234 .smp_callin_clear_local_apic
= NULL
,
235 .store_NMI_vector
= NULL
,
236 .inquire_remote_apic
= NULL
,