Release 4.14 arch/x86/kernel/apic/apic_noop.c

Directory: arch/x86/kernel/apic
// SPDX-License-Identifier: GPL-2.0
/*
 * NOOP APIC driver.
 *
 * Does almost nothing and should be substituted by a real apic driver via
 * probe routine.
 *
 * Though in case if apic is disabled (for some reason) we try
 * to not uglify the caller's code and allow to call (some) apic routines
 * like self-ipi, etc...
 */

#include <linux/threads.h>
#include <linux/cpumask.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/ctype.h>
#include <linux/errno.h>
#include <asm/fixmap.h>
#include <asm/mpspec.h>
#include <asm/apicdef.h>
#include <asm/apic.h>
#include <asm/setup.h>

#include <linux/smp.h>
#include <asm/ipi.h>

#include <linux/interrupt.h>
#include <asm/acpi.h>
#include <asm/e820/api.h>



static void noop_init_apic_ldr(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 7 100.00% 2 100.00%
Total 7 100.00% 2 100.00%



static void noop_send_IPI(int cpu, int vector) { }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%



static void noop_send_IPI_mask(const struct cpumask *cpumask, int vector) { }
Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 14 100.00% 2 100.00%
Total 14 100.00% 2 100.00%



static void noop_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vector) { }
Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 14 100.00% 2 100.00%
Total 14 100.00% 2 100.00%



static void noop_send_IPI_allbutself(int vector) { }
Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static void noop_send_IPI_all(int vector) { }
Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static void noop_send_IPI_self(int vector) { }
Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static void noop_apic_wait_icr_idle(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 7 100.00% 1 100.00%
Total 7 100.00% 1 100.00%



static void noop_apic_icr_write(u32 low, u32 id) { }

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%



static int noop_wakeup_secondary_cpu(int apicid, unsigned long start_eip)
{
	return -1;
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 17 100.00% 2 100.00%
Total 17 100.00% 2 100.00%



static u32 noop_safe_apic_wait_icr_idle(void)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 11 100.00% 2 100.00%
Total 11 100.00% 2 100.00%



static u64 noop_apic_icr_read(void)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 11 100.00% 2 100.00%
Total 11 100.00% 2 100.00%



static int noop_phys_pkg_id(int cpuid_apic, int index_msb)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 15 100.00% 2 100.00%
Total 15 100.00% 2 100.00%



static unsigned int noop_get_apic_id(unsigned long x)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 14 100.00% 2 100.00%
Total 14 100.00% 2 100.00%



static int noop_probe(void)
{
	/*
         * NOOP apic should not ever be
         * enabled via probe routine
         */
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 12 100.00% 2 100.00%
Total 12 100.00% 2 100.00%



static int noop_apic_id_registered(void)
{
	/*
         * if we would be really "pedantic"
         * we should pass read_apic_id() here
         * but since NOOP suppose APIC ID = 0
         * lets save a few cycles
         */
	return physid_isset(0, phys_cpu_present_map);
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 17 100.00% 2 100.00%
Total 17 100.00% 2 100.00%



static const struct cpumask *noop_target_cpus(void)
{
	/* only BSP here */
	return cpumask_of(0);
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 18 100.00% 1 100.00%
Total 18 100.00% 1 100.00%



static void noop_vector_allocation_domain(int cpu, struct cpumask *retmask,
					  const struct cpumask *mask)
{
	if (cpu != 0)
		pr_warning("APIC: Vector allocated for non-BSP cpu\n");
	cpumask_copy(retmask, cpumask_of(cpu));
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 30 73.17% 1 25.00%
Suresh B. Siddha 7 17.07% 2 50.00%
Alexander Gordeev 4 9.76% 1 25.00%
Total 41 100.00% 4 100.00%



static u32 noop_apic_read(u32 reg)
{
	WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !disable_apic);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 19 82.61% 1 50.00%
Borislav Petkov 4 17.39% 1 50.00%
Total 23 100.00% 2 100.00%



static void noop_apic_write(u32 reg, u32 v)
{
	WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !disable_apic);
}

Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 18 78.26% 1 33.33%
Borislav Petkov 4 17.39% 1 33.33%
Thomas Gleixner 1 4.35% 1 33.33%
Total 23 100.00% 3 100.00%


struct apic apic_noop __ro_after_init = {
	.name				= "noop",
	.probe				= noop_probe,
	.acpi_madt_oem_check		= NULL,

	.apic_id_valid			= default_apic_id_valid,
	.apic_id_registered		= noop_apic_id_registered,

	.irq_delivery_mode		= dest_LowestPrio,
	/* logical delivery broadcast to all CPUs: */
	.irq_dest_mode			= 1,

	.target_cpus			= noop_target_cpus,
	.disable_esr			= 0,
	.dest_logical			= APIC_DEST_LOGICAL,
	.check_apicid_used		= default_check_apicid_used,

	.vector_allocation_domain	= noop_vector_allocation_domain,
	.init_apic_ldr			= noop_init_apic_ldr,

	.ioapic_phys_id_map		= default_ioapic_phys_id_map,
	.setup_apic_routing		= NULL,

	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
	.apicid_to_cpu_present		= physid_set_mask_of_physid,

	.check_phys_apicid_present	= default_check_phys_apicid_present,

	.phys_pkg_id			= noop_phys_pkg_id,

	.get_apic_id			= noop_get_apic_id,
	.set_apic_id			= NULL,

	.cpu_mask_to_apicid		= flat_cpu_mask_to_apicid,

	.send_IPI			= noop_send_IPI,
	.send_IPI_mask			= noop_send_IPI_mask,
	.send_IPI_mask_allbutself	= noop_send_IPI_mask_allbutself,
	.send_IPI_allbutself		= noop_send_IPI_allbutself,
	.send_IPI_all			= noop_send_IPI_all,
	.send_IPI_self			= noop_send_IPI_self,

	.wakeup_secondary_cpu		= noop_wakeup_secondary_cpu,

	.inquire_remote_apic		= NULL,

	.read				= noop_apic_read,
	.write				= noop_apic_write,
	.eoi_write			= noop_apic_write,
	.icr_read			= noop_apic_icr_read,
	.icr_write			= noop_apic_icr_write,
	.wait_icr_idle			= noop_apic_wait_icr_idle,
	.safe_wait_icr_idle		= noop_safe_apic_wait_icr_idle,

#ifdef CONFIG_X86_32
	.x86_32_early_logical_apicid	= noop_x86_32_early_logical_apicid,
#endif
};
Overall Contributors
Person Tokens Prop Commits CommitProp
Cyrill V. Gorcunov 480 88.24% 4 22.22%
Thomas Gleixner 19 3.49% 3 16.67%
Tejun Heo 12 2.21% 1 5.56%
Borislav Petkov 8 1.47% 1 5.56%
Suresh B. Siddha 7 1.29% 2 11.11%
Daniel J Blueman 5 0.92% 1 5.56%
Michael S. Tsirkin 5 0.92% 1 5.56%
Alexander Gordeev 4 0.74% 1 5.56%
Greg Kroah-Hartman 1 0.18% 1 5.56%
Ingo Molnar 1 0.18% 1 5.56%
David Rientjes 1 0.18% 1 5.56%
Kees Cook 1 0.18% 1 5.56%
Total 544 100.00% 18 100.00%
Directory: arch/x86/kernel/apic

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Cyrill V. Gorcunov	7	100.00%	2	100.00%
Total	7	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 arch/x86/kernel/apic/apic_noop.c

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
