164063505SThomas Gleixner /* 264063505SThomas Gleixner * Common functions shared between the various APIC flavours 364063505SThomas Gleixner * 464063505SThomas Gleixner * SPDX-License-Identifier: GPL-2.0 564063505SThomas Gleixner */ 664063505SThomas Gleixner #include <linux/irq.h> 764063505SThomas Gleixner #include <asm/apic.h> 864063505SThomas Gleixner 983a10522SThomas Gleixner int default_cpu_mask_to_apicid(const struct cpumask *msk, struct irq_data *irqd, 1083a10522SThomas Gleixner unsigned int *apicid) 1183a10522SThomas Gleixner { 1283a10522SThomas Gleixner unsigned int cpu = cpumask_first(msk); 1383a10522SThomas Gleixner 1483a10522SThomas Gleixner if (cpu >= nr_cpu_ids) 1583a10522SThomas Gleixner return -EINVAL; 1683a10522SThomas Gleixner *apicid = per_cpu(x86_cpu_to_apicid, cpu); 1783a10522SThomas Gleixner irq_data_update_effective_affinity(irqd, cpumask_of(cpu)); 1883a10522SThomas Gleixner return 0; 1983a10522SThomas Gleixner } 2083a10522SThomas Gleixner 2183a10522SThomas Gleixner int flat_cpu_mask_to_apicid(const struct cpumask *mask, struct irq_data *irqd, 2283a10522SThomas Gleixner unsigned int *apicid) 2383a10522SThomas Gleixner 2483a10522SThomas Gleixner { 2583a10522SThomas Gleixner struct cpumask *effmsk = irq_data_get_effective_affinity_mask(irqd); 2683a10522SThomas Gleixner unsigned long cpu_mask = cpumask_bits(mask)[0] & APIC_ALL_CPUS; 2783a10522SThomas Gleixner 2883a10522SThomas Gleixner if (!cpu_mask) 2983a10522SThomas Gleixner return -EINVAL; 3083a10522SThomas Gleixner *apicid = (unsigned int)cpu_mask; 3183a10522SThomas Gleixner cpumask_bits(effmsk)[0] = cpu_mask; 3283a10522SThomas Gleixner return 0; 3383a10522SThomas Gleixner } 3483a10522SThomas Gleixner 3583a10522SThomas Gleixner bool default_check_apicid_used(physid_mask_t *map, int apicid) 3683a10522SThomas Gleixner { 3783a10522SThomas Gleixner return physid_isset(apicid, *map); 3883a10522SThomas Gleixner } 3983a10522SThomas Gleixner 4083a10522SThomas Gleixner void flat_vector_allocation_domain(int cpu, struct cpumask *retmask, 4183a10522SThomas Gleixner const struct cpumask *mask) 4283a10522SThomas Gleixner { 4383a10522SThomas Gleixner /* 4483a10522SThomas Gleixner * Careful. Some cpus do not strictly honor the set of cpus 4583a10522SThomas Gleixner * specified in the interrupt destination when using lowest 4683a10522SThomas Gleixner * priority interrupt delivery mode. 4783a10522SThomas Gleixner * 4883a10522SThomas Gleixner * In particular there was a hyperthreading cpu observed to 4983a10522SThomas Gleixner * deliver interrupts to the wrong hyperthread when only one 5083a10522SThomas Gleixner * hyperthread was specified in the interrupt desitination. 5183a10522SThomas Gleixner */ 5283a10522SThomas Gleixner cpumask_clear(retmask); 5383a10522SThomas Gleixner cpumask_bits(retmask)[0] = APIC_ALL_CPUS; 5483a10522SThomas Gleixner } 5583a10522SThomas Gleixner 5683a10522SThomas Gleixner void default_vector_allocation_domain(int cpu, struct cpumask *retmask, 5783a10522SThomas Gleixner const struct cpumask *mask) 5883a10522SThomas Gleixner { 5983a10522SThomas Gleixner cpumask_copy(retmask, cpumask_of(cpu)); 6083a10522SThomas Gleixner } 6183a10522SThomas Gleixner 6283a10522SThomas Gleixner void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) 6383a10522SThomas Gleixner { 6483a10522SThomas Gleixner *retmap = *phys_map; 6583a10522SThomas Gleixner } 6683a10522SThomas Gleixner 6764063505SThomas Gleixner int default_cpu_present_to_apicid(int mps_cpu) 6864063505SThomas Gleixner { 6964063505SThomas Gleixner if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu)) 7064063505SThomas Gleixner return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu); 7164063505SThomas Gleixner else 7264063505SThomas Gleixner return BAD_APICID; 7364063505SThomas Gleixner } 7483a10522SThomas Gleixner EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid); 7564063505SThomas Gleixner 7664063505SThomas Gleixner int default_check_phys_apicid_present(int phys_apicid) 7764063505SThomas Gleixner { 7864063505SThomas Gleixner return physid_isset(phys_apicid, phys_cpu_present_map); 7964063505SThomas Gleixner } 8083a10522SThomas Gleixner 8183a10522SThomas Gleixner const struct cpumask *default_target_cpus(void) 8283a10522SThomas Gleixner { 8383a10522SThomas Gleixner #ifdef CONFIG_SMP 8483a10522SThomas Gleixner return cpu_online_mask; 8583a10522SThomas Gleixner #else 8683a10522SThomas Gleixner return cpumask_of(0); 8783a10522SThomas Gleixner #endif 8883a10522SThomas Gleixner } 8983a10522SThomas Gleixner 9083a10522SThomas Gleixner const struct cpumask *online_target_cpus(void) 9183a10522SThomas Gleixner { 9283a10522SThomas Gleixner return cpu_online_mask; 9383a10522SThomas Gleixner } 9483a10522SThomas Gleixner 9583a10522SThomas Gleixner int default_apic_id_valid(int apicid) 9683a10522SThomas Gleixner { 9783a10522SThomas Gleixner return (apicid < 255); 9883a10522SThomas Gleixner } 99