1 /* 2 * Common functions shared between the various APIC flavours 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 #include <linux/irq.h> 7 #include <asm/apic.h> 8 9 u32 apic_default_calc_apicid(unsigned int cpu) 10 { 11 return per_cpu(x86_cpu_to_apicid, cpu); 12 } 13 14 int default_cpu_mask_to_apicid(const struct cpumask *msk, struct irq_data *irqd, 15 unsigned int *apicid) 16 { 17 unsigned int cpu = cpumask_first(msk); 18 19 if (cpu >= nr_cpu_ids) 20 return -EINVAL; 21 *apicid = per_cpu(x86_cpu_to_apicid, cpu); 22 irq_data_update_effective_affinity(irqd, cpumask_of(cpu)); 23 return 0; 24 } 25 26 u32 apic_flat_calc_apicid(unsigned int cpu) 27 { 28 return 1U << cpu; 29 } 30 31 int flat_cpu_mask_to_apicid(const struct cpumask *mask, struct irq_data *irqd, 32 unsigned int *apicid) 33 34 { 35 struct cpumask *effmsk = irq_data_get_effective_affinity_mask(irqd); 36 unsigned long cpu_mask = cpumask_bits(mask)[0] & APIC_ALL_CPUS; 37 38 if (!cpu_mask) 39 return -EINVAL; 40 *apicid = (unsigned int)cpu_mask; 41 cpumask_bits(effmsk)[0] = cpu_mask; 42 return 0; 43 } 44 45 bool default_check_apicid_used(physid_mask_t *map, int apicid) 46 { 47 return physid_isset(apicid, *map); 48 } 49 50 void flat_vector_allocation_domain(int cpu, struct cpumask *retmask, 51 const struct cpumask *mask) 52 { 53 /* 54 * Careful. Some cpus do not strictly honor the set of cpus 55 * specified in the interrupt destination when using lowest 56 * priority interrupt delivery mode. 57 * 58 * In particular there was a hyperthreading cpu observed to 59 * deliver interrupts to the wrong hyperthread when only one 60 * hyperthread was specified in the interrupt desitination. 61 */ 62 cpumask_clear(retmask); 63 cpumask_bits(retmask)[0] = APIC_ALL_CPUS; 64 } 65 66 void default_vector_allocation_domain(int cpu, struct cpumask *retmask, 67 const struct cpumask *mask) 68 { 69 cpumask_copy(retmask, cpumask_of(cpu)); 70 } 71 72 void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) 73 { 74 *retmap = *phys_map; 75 } 76 77 int default_cpu_present_to_apicid(int mps_cpu) 78 { 79 if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu)) 80 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu); 81 else 82 return BAD_APICID; 83 } 84 EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid); 85 86 int default_check_phys_apicid_present(int phys_apicid) 87 { 88 return physid_isset(phys_apicid, phys_cpu_present_map); 89 } 90 91 int default_apic_id_valid(int apicid) 92 { 93 return (apicid < 255); 94 } 95