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>
13 static DEFINE_PER_CPU(u32
, x86_cpu_to_logical_apicid
);
15 static int x2apic_acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
17 return x2apic_enabled();
21 * need to use more than cpu 0, because we need more vectors when
24 static const struct cpumask
*x2apic_target_cpus(void)
26 return cpu_online_mask
;
30 * for now each logical cpu is in its own vector allocation domain.
32 static void x2apic_vector_allocation_domain(int cpu
, struct cpumask
*retmask
)
34 cpumask_clear(retmask
);
35 cpumask_set_cpu(cpu
, retmask
);
39 __x2apic_send_IPI_dest(unsigned int apicid
, int vector
, unsigned int dest
)
43 cfg
= __prepare_ICR(0, vector
, dest
);
48 native_x2apic_icr_write(cfg
, apicid
);
52 * for now, we send the IPI's one by one in the cpumask.
53 * TBD: Based on the cpu mask, we can send the IPI's to the cluster group
54 * at once. We have 16 cpu's in a cluster. This will minimize IPI register
57 static void x2apic_send_IPI_mask(const struct cpumask
*mask
, int vector
)
59 unsigned long query_cpu
;
64 local_irq_save(flags
);
65 for_each_cpu(query_cpu
, mask
) {
66 __x2apic_send_IPI_dest(
67 per_cpu(x86_cpu_to_logical_apicid
, query_cpu
),
68 vector
, apic
->dest_logical
);
70 local_irq_restore(flags
);
74 x2apic_send_IPI_mask_allbutself(const struct cpumask
*mask
, int vector
)
76 unsigned long this_cpu
= smp_processor_id();
77 unsigned long query_cpu
;
82 local_irq_save(flags
);
83 for_each_cpu(query_cpu
, mask
) {
84 if (query_cpu
== this_cpu
)
86 __x2apic_send_IPI_dest(
87 per_cpu(x86_cpu_to_logical_apicid
, query_cpu
),
88 vector
, apic
->dest_logical
);
90 local_irq_restore(flags
);
93 static void x2apic_send_IPI_allbutself(int vector
)
95 unsigned long this_cpu
= smp_processor_id();
96 unsigned long query_cpu
;
101 local_irq_save(flags
);
102 for_each_online_cpu(query_cpu
) {
103 if (query_cpu
== this_cpu
)
105 __x2apic_send_IPI_dest(
106 per_cpu(x86_cpu_to_logical_apicid
, query_cpu
),
107 vector
, apic
->dest_logical
);
109 local_irq_restore(flags
);
112 static void x2apic_send_IPI_all(int vector
)
114 x2apic_send_IPI_mask(cpu_online_mask
, vector
);
117 static int x2apic_apic_id_registered(void)
122 static unsigned int x2apic_cpu_mask_to_apicid(const struct cpumask
*cpumask
)
125 * We're using fixed IRQ delivery, can only return one logical APIC ID.
126 * May as well be the first.
128 int cpu
= cpumask_first(cpumask
);
130 if ((unsigned)cpu
< nr_cpu_ids
)
131 return per_cpu(x86_cpu_to_logical_apicid
, cpu
);
137 x2apic_cpu_mask_to_apicid_and(const struct cpumask
*cpumask
,
138 const struct cpumask
*andmask
)
143 * We're using fixed IRQ delivery, can only return one logical APIC ID.
144 * May as well be the first.
146 for_each_cpu_and(cpu
, cpumask
, andmask
) {
147 if (cpumask_test_cpu(cpu
, cpu_online_mask
))
151 return per_cpu(x86_cpu_to_logical_apicid
, cpu
);
154 static unsigned int x2apic_cluster_phys_get_apic_id(unsigned long x
)
162 static unsigned long set_apic_id(unsigned int id
)
170 static int x2apic_cluster_phys_pkg_id(int initial_apicid
, int index_msb
)
172 return initial_apicid
>> index_msb
;
175 static void x2apic_send_IPI_self(int vector
)
177 apic_write(APIC_SELF_IPI
, vector
);
180 static void init_x2apic_ldr(void)
182 int cpu
= smp_processor_id();
184 per_cpu(x86_cpu_to_logical_apicid
, cpu
) = apic_read(APIC_LDR
);
187 struct apic apic_x2apic_cluster
= {
189 .name
= "cluster x2apic",
191 .acpi_madt_oem_check
= x2apic_acpi_madt_oem_check
,
192 .apic_id_registered
= x2apic_apic_id_registered
,
194 .irq_delivery_mode
= dest_LowestPrio
,
195 .irq_dest_mode
= 1, /* logical */
197 .target_cpus
= x2apic_target_cpus
,
199 .dest_logical
= APIC_DEST_LOGICAL
,
200 .check_apicid_used
= NULL
,
201 .check_apicid_present
= NULL
,
203 .vector_allocation_domain
= x2apic_vector_allocation_domain
,
204 .init_apic_ldr
= init_x2apic_ldr
,
206 .ioapic_phys_id_map
= NULL
,
207 .setup_apic_routing
= NULL
,
208 .multi_timer_check
= 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
,
230 .trampoline_phys_low
= DEFAULT_TRAMPOLINE_PHYS_LOW
,
231 .trampoline_phys_high
= DEFAULT_TRAMPOLINE_PHYS_HIGH
,
232 .wait_for_init_deassert
= NULL
,
233 .smp_callin_clear_local_apic
= NULL
,
234 .inquire_remote_apic
= NULL
,
236 .read
= native_apic_msr_read
,
237 .write
= native_apic_msr_write
,
238 .icr_read
= native_x2apic_icr_read
,
239 .icr_write
= native_x2apic_icr_write
,
240 .wait_icr_idle
= native_x2apic_wait_icr_idle
,
241 .safe_wait_icr_idle
= native_safe_x2apic_wait_icr_idle
,