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
);
39 static void __x2apic_send_IPI_dest(unsigned int apicid
, int vector
,
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
)
61 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
);
68 local_irq_restore(flags
);
71 static void x2apic_send_IPI_mask_allbutself(const struct cpumask
*mask
,
75 unsigned long query_cpu
;
76 unsigned long this_cpu
= smp_processor_id();
78 local_irq_save(flags
);
79 for_each_cpu(query_cpu
, mask
)
80 if (query_cpu
!= this_cpu
)
81 __x2apic_send_IPI_dest(
82 per_cpu(x86_cpu_to_logical_apicid
, query_cpu
),
83 vector
, APIC_DEST_LOGICAL
);
84 local_irq_restore(flags
);
87 static void x2apic_send_IPI_allbutself(int vector
)
90 unsigned long query_cpu
;
91 unsigned long this_cpu
= smp_processor_id();
93 local_irq_save(flags
);
94 for_each_online_cpu(query_cpu
)
95 if (query_cpu
!= this_cpu
)
96 __x2apic_send_IPI_dest(
97 per_cpu(x86_cpu_to_logical_apicid
, query_cpu
),
98 vector
, APIC_DEST_LOGICAL
);
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
)
117 * We're using fixed IRQ delivery, can only return one logical APIC ID.
118 * May as well be the first.
120 cpu
= cpumask_first(cpumask
);
121 if ((unsigned)cpu
< nr_cpu_ids
)
122 return per_cpu(x86_cpu_to_logical_apicid
, cpu
);
127 static unsigned int 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 logical 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
))
139 if (cpu
< nr_cpu_ids
)
140 return per_cpu(x86_cpu_to_logical_apicid
, cpu
);
144 static unsigned int get_apic_id(unsigned long x
)
152 static unsigned long set_apic_id(unsigned int id
)
160 static unsigned int phys_pkg_id(int index_msb
)
162 return current_cpu_data
.initial_apicid
>> index_msb
;
165 static void x2apic_send_IPI_self(int vector
)
167 apic_write(APIC_SELF_IPI
, vector
);
170 static void init_x2apic_ldr(void)
172 int cpu
= smp_processor_id();
174 per_cpu(x86_cpu_to_logical_apicid
, cpu
) = apic_read(APIC_LDR
);
178 struct genapic apic_x2apic_cluster
= {
179 .name
= "cluster x2apic",
180 .acpi_madt_oem_check
= x2apic_acpi_madt_oem_check
,
181 .int_delivery_mode
= dest_LowestPrio
,
182 .int_dest_mode
= (APIC_DEST_LOGICAL
!= 0),
183 .target_cpus
= x2apic_target_cpus
,
184 .vector_allocation_domain
= x2apic_vector_allocation_domain
,
185 .apic_id_registered
= x2apic_apic_id_registered
,
186 .init_apic_ldr
= init_x2apic_ldr
,
187 .send_IPI_all
= x2apic_send_IPI_all
,
188 .send_IPI_allbutself
= x2apic_send_IPI_allbutself
,
189 .send_IPI_mask
= x2apic_send_IPI_mask
,
190 .send_IPI_mask_allbutself
= x2apic_send_IPI_mask_allbutself
,
191 .send_IPI_self
= x2apic_send_IPI_self
,
192 .cpu_mask_to_apicid
= x2apic_cpu_mask_to_apicid
,
193 .cpu_mask_to_apicid_and
= x2apic_cpu_mask_to_apicid_and
,
194 .phys_pkg_id
= phys_pkg_id
,
195 .get_apic_id
= get_apic_id
,
196 .set_apic_id
= set_apic_id
,
197 .apic_id_mask
= (0xFFFFFFFFu
),