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/dmar.h>
9 #include <asm/x2apic.h>
13 static struct apic apic_x2apic_phys;
15 static int set_x2apic_phys_mode(char *arg)
20 early_param("x2apic_phys", set_x2apic_phys_mode);
22 static bool x2apic_fadt_phys(void)
25 if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) &&
26 (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
27 printk(KERN_DEBUG "System requires x2apic physical mode\n");
34 static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
36 return x2apic_enabled() && (x2apic_phys || x2apic_fadt_phys());
40 __x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest)
42 unsigned long query_cpu;
43 unsigned long this_cpu;
46 /* x2apic MSRs are special and need a special fence: */
49 local_irq_save(flags);
51 this_cpu = smp_processor_id();
52 for_each_cpu(query_cpu, mask) {
53 if (apic_dest == APIC_DEST_ALLBUT && this_cpu == query_cpu)
55 __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu),
56 vector, APIC_DEST_PHYSICAL);
58 local_irq_restore(flags);
61 static void x2apic_send_IPI_mask(const struct cpumask *mask, int vector)
63 __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLINC);
67 x2apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
69 __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLBUT);
72 static void x2apic_send_IPI_allbutself(int vector)
74 __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLBUT);
77 static void x2apic_send_IPI_all(int vector)
79 __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLINC);
82 static void init_x2apic_ldr(void)
86 static int x2apic_phys_probe(void)
88 if (x2apic_mode && (x2apic_phys || x2apic_fadt_phys()))
91 return apic == &apic_x2apic_phys;
94 static struct apic apic_x2apic_phys = {
96 .name = "physical x2apic",
97 .probe = x2apic_phys_probe,
98 .acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
99 .apic_id_valid = x2apic_apic_id_valid,
100 .apic_id_registered = x2apic_apic_id_registered,
102 .irq_delivery_mode = dest_Fixed,
103 .irq_dest_mode = 0, /* physical */
105 .target_cpus = online_target_cpus,
108 .check_apicid_used = NULL,
110 .vector_allocation_domain = default_vector_allocation_domain,
111 .init_apic_ldr = init_x2apic_ldr,
113 .ioapic_phys_id_map = NULL,
114 .setup_apic_routing = NULL,
115 .cpu_present_to_apicid = default_cpu_present_to_apicid,
116 .apicid_to_cpu_present = NULL,
117 .check_phys_apicid_present = default_check_phys_apicid_present,
118 .phys_pkg_id = x2apic_phys_pkg_id,
120 .get_apic_id = x2apic_get_apic_id,
121 .set_apic_id = x2apic_set_apic_id,
122 .apic_id_mask = 0xFFFFFFFFu,
124 .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and,
126 .send_IPI_mask = x2apic_send_IPI_mask,
127 .send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself,
128 .send_IPI_allbutself = x2apic_send_IPI_allbutself,
129 .send_IPI_all = x2apic_send_IPI_all,
130 .send_IPI_self = x2apic_send_IPI_self,
132 .inquire_remote_apic = NULL,
134 .read = native_apic_msr_read,
135 .write = native_apic_msr_write,
136 .eoi_write = native_apic_msr_eoi_write,
137 .icr_read = native_x2apic_icr_read,
138 .icr_write = native_x2apic_icr_write,
139 .wait_icr_idle = native_x2apic_wait_icr_idle,
140 .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
143 apic_driver(apic_x2apic_phys);