1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2004 James Cleverdon, IBM.
 
 4 *
 5 * Generic APIC sub-arch probe layer.
 6 *
 7 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
 8 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
 9 * James Cleverdon.
10 */
11#include <linux/thread_info.h>
12#include <asm/apic.h>
 
 
 
 
 
 
 
13
14#include "local.h"
 
 
 
15
16/* Select the appropriate APIC driver */
17void __init x86_64_probe_apic(void)
 
 
18{
19	struct apic **drv;
20
21	enable_IR_x2apic();
22
23	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
24		if ((*drv)->probe && (*drv)->probe()) {
25			apic_install_driver(*drv);
 
 
 
 
26			break;
27		}
28	}
 
 
 
 
 
 
 
 
 
 
29}
30
31int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
32{
33	struct apic **drv;
34
35	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
36		if ((*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) {
37			apic_install_driver(*drv);
 
 
 
 
38			return 1;
39		}
40	}
41	return 0;
42}

 
 1/*
 2 * Copyright 2004 James Cleverdon, IBM.
 3 * Subject to the GNU Public License, v.2
 4 *
 5 * Generic APIC sub-arch probe layer.
 6 *
 7 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
 8 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
 9 * James Cleverdon.
10 */
11#include <linux/threads.h>
12#include <linux/cpumask.h>
13#include <linux/string.h>
14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/ctype.h>
17#include <linux/init.h>
18#include <linux/hardirq.h>
19#include <linux/dmar.h>
20
21#include <asm/smp.h>
22#include <asm/apic.h>
23#include <asm/ipi.h>
24#include <asm/setup.h>
25
26/*
27 * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
28 */
29void __init default_setup_apic_routing(void)
30{
31	struct apic **drv;
32
33	enable_IR_x2apic();
34
35	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
36		if ((*drv)->probe && (*drv)->probe()) {
37			if (apic != *drv) {
38				apic = *drv;
39				pr_info("Switched APIC routing to %s.\n",
40					apic->name);
41			}
42			break;
43		}
44	}
45
46	if (x86_platform.apic_post_init)
47		x86_platform.apic_post_init();
48}
49
50/* Same for both flat and physical. */
51
52void apic_send_IPI_self(int vector)
53{
54	__default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
55}
56
57int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
58{
59	struct apic **drv;
60
61	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
62		if ((*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) {
63			if (apic != *drv) {
64				apic = *drv;
65				pr_info("Setting APIC routing to %s.\n",
66					apic->name);
67			}
68			return 1;
69		}
70	}
71	return 0;
72}