95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
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* Common functions shared between the various APIC flavours
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <linux/irq.h>
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#include <asm/apic.h>
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u32 apic_default_calc_apicid(unsigned int cpu)
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{
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return per_cpu(x86_cpu_to_apicid, cpu);
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}
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int default_cpu_mask_to_apicid(const struct cpumask *msk, struct irq_data *irqd,
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unsigned int *apicid)
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{
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unsigned int cpu = cpumask_first(msk);
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if (cpu >= nr_cpu_ids)
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return -EINVAL;
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*apicid = per_cpu(x86_cpu_to_apicid, cpu);
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irq_data_update_effective_affinity(irqd, cpumask_of(cpu));
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return 0;
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}
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u32 apic_flat_calc_apicid(unsigned int cpu)
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{
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return 1U << cpu;
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}
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int flat_cpu_mask_to_apicid(const struct cpumask *mask, struct irq_data *irqd,
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unsigned int *apicid)
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{
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struct cpumask *effmsk = irq_data_get_effective_affinity_mask(irqd);
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unsigned long cpu_mask = cpumask_bits(mask)[0] & APIC_ALL_CPUS;
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if (!cpu_mask)
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return -EINVAL;
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*apicid = (unsigned int)cpu_mask;
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cpumask_bits(effmsk)[0] = cpu_mask;
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return 0;
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}
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bool default_check_apicid_used(physid_mask_t *map, int apicid)
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{
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return physid_isset(apicid, *map);
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}
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void flat_vector_allocation_domain(int cpu, struct cpumask *retmask,
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const struct cpumask *mask)
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{
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/*
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* Careful. Some cpus do not strictly honor the set of cpus
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* specified in the interrupt destination when using lowest
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* priority interrupt delivery mode.
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*
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* In particular there was a hyperthreading cpu observed to
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* deliver interrupts to the wrong hyperthread when only one
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* hyperthread was specified in the interrupt desitination.
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*/
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cpumask_clear(retmask);
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cpumask_bits(retmask)[0] = APIC_ALL_CPUS;
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}
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void default_vector_allocation_domain(int cpu, struct cpumask *retmask,
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const struct cpumask *mask)
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{
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cpumask_copy(retmask, cpumask_of(cpu));
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}
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void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
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{
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*retmap = *phys_map;
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}
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int default_cpu_present_to_apicid(int mps_cpu)
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{
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if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
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return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
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else
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return BAD_APICID;
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}
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EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
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int default_check_phys_apicid_present(int phys_apicid)
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{
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return physid_isset(phys_apicid, phys_cpu_present_map);
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}
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int default_apic_id_valid(int apicid)
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{
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return (apicid < 255);
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}
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