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
26static int apicid_phys_pkg_id(int initial_apic_id, int index_msb)
27{
28	return hard_smp_processor_id() >> index_msb;
29}
30
31/*
32 * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
33 */
34void __init default_setup_apic_routing(void)
35{
36	struct apic **drv;
37
38	enable_IR_x2apic();
39
40	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
41		if ((*drv)->probe && (*drv)->probe()) {
42			if (apic != *drv) {
43				apic = *drv;
44				pr_info("Switched APIC routing to %s.\n",
45					apic->name);
46			}
47			break;
48		}
49	}
50
51	if (is_vsmp_box()) {
52		/* need to update phys_pkg_id */
53		apic->phys_pkg_id = apicid_phys_pkg_id;
54	}
55}
56
57/* Same for both flat and physical. */
58
59void apic_send_IPI_self(int vector)
60{
61	__default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
62}
63
64int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
65{
66	struct apic **drv;
67
68	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
69		if ((*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) {
70			if (apic != *drv) {
71				apic = *drv;
72				pr_info("Setting APIC routing to %s.\n",
73					apic->name);
74			}
75			return 1;
76		}
77	}
78	return 0;
79}