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>
15 static int set_x2apic_phys_mode(char *arg
)
20 early_param("x2apic_phys", set_x2apic_phys_mode
);
22 static int x2apic_acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
25 return x2apic_enabled();
30 /* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */
32 static const struct cpumask
*x2apic_target_cpus(void)
37 static void x2apic_vector_allocation_domain(int cpu
, struct cpumask
*retmask
)
39 cpumask_clear(retmask
);
40 cpumask_set_cpu(cpu
, retmask
);
43 static void __x2apic_send_IPI_dest(unsigned int apicid
, int vector
,
48 cfg
= __prepare_ICR(0, vector
, dest
);
53 native_x2apic_icr_write(cfg
, apicid
);
56 static void x2apic_send_IPI_mask(const struct cpumask
*mask
, int vector
)
58 unsigned long query_cpu
;
61 local_irq_save(flags
);
62 for_each_cpu(query_cpu
, mask
) {
63 __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid
, query_cpu
),
64 vector
, APIC_DEST_PHYSICAL
);
66 local_irq_restore(flags
);
70 x2apic_send_IPI_mask_allbutself(const struct cpumask
*mask
, int vector
)
72 unsigned long this_cpu
= smp_processor_id();
73 unsigned long query_cpu
;
76 local_irq_save(flags
);
77 for_each_cpu(query_cpu
, mask
) {
78 if (query_cpu
!= this_cpu
)
79 __x2apic_send_IPI_dest(
80 per_cpu(x86_cpu_to_apicid
, query_cpu
),
81 vector
, APIC_DEST_PHYSICAL
);
83 local_irq_restore(flags
);
86 static void x2apic_send_IPI_allbutself(int vector
)
88 unsigned long this_cpu
= smp_processor_id();
89 unsigned long query_cpu
;
92 local_irq_save(flags
);
93 for_each_online_cpu(query_cpu
) {
94 if (query_cpu
== this_cpu
)
96 __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid
, query_cpu
),
97 vector
, APIC_DEST_PHYSICAL
);
99 local_irq_restore(flags
);
102 static void x2apic_send_IPI_all(int vector
)
104 x2apic_send_IPI_mask(cpu_online_mask
, vector
);
107 static int x2apic_apic_id_registered(void)
112 static unsigned int x2apic_cpu_mask_to_apicid(const struct cpumask
*cpumask
)
115 * We're using fixed IRQ delivery, can only return one phys APIC ID.
116 * May as well be the first.
118 int cpu
= cpumask_first(cpumask
);
120 if ((unsigned)cpu
< nr_cpu_ids
)
121 return per_cpu(x86_cpu_to_apicid
, cpu
);
127 x2apic_cpu_mask_to_apicid_and(const struct cpumask
*cpumask
,
128 const struct cpumask
*andmask
)
133 * We're using fixed IRQ delivery, can only return one phys APIC ID.
134 * May as well be the first.
136 for_each_cpu_and(cpu
, cpumask
, andmask
) {
137 if (cpumask_test_cpu(cpu
, cpu_online_mask
))
141 if (cpu
< nr_cpu_ids
)
142 return per_cpu(x86_cpu_to_apicid
, cpu
);
147 static unsigned int x2apic_phys_get_apic_id(unsigned long x
)
152 static unsigned long set_apic_id(unsigned int id
)
157 static int x2apic_phys_pkg_id(int initial_apicid
, int index_msb
)
159 return current_cpu_data
.initial_apicid
>> index_msb
;
162 static void x2apic_send_IPI_self(int vector
)
164 apic_write(APIC_SELF_IPI
, vector
);
167 static void init_x2apic_ldr(void)
171 struct apic apic_x2apic_phys
= {
173 .name
= "physical x2apic",
175 .acpi_madt_oem_check
= x2apic_acpi_madt_oem_check
,
176 .apic_id_registered
= x2apic_apic_id_registered
,
178 .irq_delivery_mode
= dest_Fixed
,
179 .irq_dest_mode
= 0, /* physical */
181 .target_cpus
= x2apic_target_cpus
,
184 .check_apicid_used
= NULL
,
185 .check_apicid_present
= NULL
,
187 .vector_allocation_domain
= x2apic_vector_allocation_domain
,
188 .init_apic_ldr
= init_x2apic_ldr
,
190 .ioapic_phys_id_map
= NULL
,
191 .setup_apic_routing
= NULL
,
192 .multi_timer_check
= NULL
,
193 .apicid_to_node
= NULL
,
194 .cpu_to_logical_apicid
= NULL
,
195 .cpu_present_to_apicid
= default_cpu_present_to_apicid
,
196 .apicid_to_cpu_present
= NULL
,
197 .setup_portio_remap
= NULL
,
198 .check_phys_apicid_present
= default_check_phys_apicid_present
,
199 .enable_apic_mode
= NULL
,
200 .phys_pkg_id
= x2apic_phys_pkg_id
,
201 .mps_oem_check
= NULL
,
203 .get_apic_id
= x2apic_phys_get_apic_id
,
204 .set_apic_id
= set_apic_id
,
205 .apic_id_mask
= 0xFFFFFFFFu
,
207 .cpu_mask_to_apicid
= x2apic_cpu_mask_to_apicid
,
208 .cpu_mask_to_apicid_and
= x2apic_cpu_mask_to_apicid_and
,
210 .send_IPI_mask
= x2apic_send_IPI_mask
,
211 .send_IPI_mask_allbutself
= x2apic_send_IPI_mask_allbutself
,
212 .send_IPI_allbutself
= x2apic_send_IPI_allbutself
,
213 .send_IPI_all
= x2apic_send_IPI_all
,
214 .send_IPI_self
= x2apic_send_IPI_self
,
216 .wakeup_cpu
= wakeup_secondary_cpu_via_init
,
217 .trampoline_phys_low
= DEFAULT_TRAMPOLINE_PHYS_LOW
,
218 .trampoline_phys_high
= DEFAULT_TRAMPOLINE_PHYS_HIGH
,
219 .wait_for_init_deassert
= NULL
,
220 .smp_callin_clear_local_apic
= NULL
,
221 .inquire_remote_apic
= NULL
,
223 .read
= native_apic_msr_read
,
224 .write
= native_apic_msr_write
,
225 .icr_read
= native_x2apic_icr_read
,
226 .icr_write
= native_x2apic_icr_write
,
227 .wait_icr_idle
= native_x2apic_wait_icr_idle
,
228 .safe_wait_icr_idle
= native_safe_x2apic_wait_icr_idle
,