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// 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/*
17 * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
18 */
19void __init default_setup_apic_routing(void)
20{
21	struct apic **drv;
22
23	enable_IR_x2apic();
24
25	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
26		if ((*drv)->probe && (*drv)->probe()) {
27			if (apic != *drv) {
28				apic = *drv;
29				pr_info("Switched APIC routing to %s.\n",
30					apic->name);
31			}
32			break;
33		}
34	}
35}
36
37int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
38{
39	struct apic **drv;
40
41	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
42		if ((*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) {
43			if (apic != *drv) {
44				apic = *drv;
45				pr_info("Setting APIC routing to %s.\n",
46					apic->name);
47			}
48			return 1;
49		}
50	}
51	return 0;
52}