8aa2a4178d
APIC IDs are used with random data types u16, u32, int, unsigned int, unsigned long. Make it all consistently use u32 because that reflects the hardware register width and fixup a few related usage sites for consistency sake. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Juergen Gross <jgross@suse.com> Tested-by: Sohil Mehta <sohil.mehta@intel.com> Tested-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Zhang Rui <rui.zhang@intel.com> Reviewed-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20230814085113.054064391@linutronix.de
57 lines
1.2 KiB
C
57 lines
1.2 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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#include "local.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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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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bool default_check_apicid_used(physid_mask_t *map, u32 apicid)
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{
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return physid_isset(apicid, *map);
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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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u32 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_cpu_to_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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bool default_apic_id_registered(void)
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{
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return physid_isset(read_apic_id(), phys_cpu_present_map);
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}
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/*
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* Set up the logical destination ID when the APIC operates in logical
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* destination mode.
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*/
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void default_init_apic_ldr(void)
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{
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unsigned long val;
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apic_write(APIC_DFR, APIC_DFR_FLAT);
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val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
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val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
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apic_write(APIC_LDR, val);
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}
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