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());
39 static void x2apic_send_IPI(int cpu, int vector)
41 u32 dest = per_cpu(x86_cpu_to_apicid, cpu);
44 __x2apic_send_IPI_dest(dest, vector, APIC_DEST_PHYSICAL);
48 __x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest)
50 unsigned long query_cpu;
51 unsigned long this_cpu;
56 local_irq_save(flags);
58 this_cpu = smp_processor_id();
59 for_each_cpu(query_cpu, mask) {
60 if (apic_dest == APIC_DEST_ALLBUT && this_cpu == query_cpu)
62 __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu),
63 vector, APIC_DEST_PHYSICAL);
65 local_irq_restore(flags);
68 static void x2apic_send_IPI_mask(const struct cpumask *mask, int vector)
70 __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLINC);
74 x2apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
76 __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLBUT);
79 static void x2apic_send_IPI_allbutself(int vector)
81 __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLBUT);
84 static void x2apic_send_IPI_all(int vector)
86 __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLINC);
89 static void init_x2apic_ldr(void)
93 static int x2apic_phys_probe(void)
95 if (x2apic_mode && (x2apic_phys || x2apic_fadt_phys()))
98 return apic == &apic_x2apic_phys;
101 static struct apic apic_x2apic_phys __ro_after_init = {
103 .name = "physical x2apic",
104 .probe = x2apic_phys_probe,
105 .acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
106 .apic_id_valid = x2apic_apic_id_valid,
107 .apic_id_registered = x2apic_apic_id_registered,
109 .irq_delivery_mode = dest_Fixed,
110 .irq_dest_mode = 0, /* physical */
112 .target_cpus = online_target_cpus,
115 .check_apicid_used = NULL,
117 .vector_allocation_domain = default_vector_allocation_domain,
118 .init_apic_ldr = init_x2apic_ldr,
120 .ioapic_phys_id_map = NULL,
121 .setup_apic_routing = NULL,
122 .cpu_present_to_apicid = default_cpu_present_to_apicid,
123 .apicid_to_cpu_present = NULL,
124 .check_phys_apicid_present = default_check_phys_apicid_present,
125 .phys_pkg_id = x2apic_phys_pkg_id,
127 .get_apic_id = x2apic_get_apic_id,
128 .set_apic_id = x2apic_set_apic_id,
130 .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and,
132 .send_IPI = x2apic_send_IPI,
133 .send_IPI_mask = x2apic_send_IPI_mask,
134 .send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself,
135 .send_IPI_allbutself = x2apic_send_IPI_allbutself,
136 .send_IPI_all = x2apic_send_IPI_all,
137 .send_IPI_self = x2apic_send_IPI_self,
139 .inquire_remote_apic = NULL,
141 .read = native_apic_msr_read,
142 .write = native_apic_msr_write,
143 .eoi_write = native_apic_msr_eoi_write,
144 .icr_read = native_x2apic_icr_read,
145 .icr_write = native_x2apic_icr_write,
146 .wait_icr_idle = native_x2apic_wait_icr_idle,
147 .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
150 apic_driver(apic_x2apic_phys);