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