https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 6613476e225e090cc9aad49be7fa504e290dd33d authored by Linus Torvalds on 21 January 2024, 22:11:32 UTC
Linux 6.8-rc1
Linux 6.8-rc1
Tip revision: 6613476
apic_common.c
/*
* Common functions shared between the various APIC flavours
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <linux/irq.h>
#include <asm/apic.h>
#include "local.h"
u32 apic_default_calc_apicid(unsigned int cpu)
{
return per_cpu(x86_cpu_to_apicid, cpu);
}
u32 apic_flat_calc_apicid(unsigned int cpu)
{
return 1U << cpu;
}
bool default_check_apicid_used(physid_mask_t *map, u32 apicid)
{
return physid_isset(apicid, *map);
}
void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
{
*retmap = *phys_map;
}
u32 default_cpu_present_to_apicid(int mps_cpu)
{
if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
return (int)per_cpu(x86_cpu_to_apicid, mps_cpu);
else
return BAD_APICID;
}
EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
bool default_apic_id_registered(void)
{
return physid_isset(read_apic_id(), phys_cpu_present_map);
}
/*
* Set up the logical destination ID when the APIC operates in logical
* destination mode.
*/
void default_init_apic_ldr(void)
{
unsigned long val;
apic_write(APIC_DFR, APIC_DFR_FLAT);
val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
apic_write(APIC_LDR, val);
}