1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
// 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/cpumask.h>
#include <asm/apic.h>
static void noop_init_apic_ldr(void) { }
static void noop_send_IPI(int cpu, int vector) { }
static void noop_send_IPI_mask(const struct cpumask *cpumask, int vector) { }
static void noop_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vector) { }
static void noop_send_IPI_allbutself(int vector) { }
static void noop_send_IPI_all(int vector) { }
static void noop_send_IPI_self(int vector) { }
static void noop_apic_wait_icr_idle(void) { }
static void noop_apic_icr_write(u32 low, u32 id) { }
static int noop_wakeup_secondary_cpu(int apicid, unsigned long start_eip)
{
return -1;
}
static u32 noop_safe_apic_wait_icr_idle(void)
{
return 0;
}
static u64 noop_apic_icr_read(void)
{
return 0;
}
static int noop_phys_pkg_id(int cpuid_apic, int index_msb)
{
return 0;
}
static unsigned int noop_get_apic_id(unsigned long x)
{
return 0;
}
static int noop_probe(void)
{
/*
* NOOP apic should not ever be
* enabled via probe routine
*/
return 0;
}
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);
}
static u32 noop_apic_read(u32 reg)
{
WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !disable_apic);
return 0;
}
static void noop_apic_write(u32 reg, u32 v)
{
WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !disable_apic);
}
#ifdef CONFIG_X86_32
static int noop_x86_32_early_logical_apicid(int cpu)
{
return BAD_APICID;
}
#endif
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_Fixed,
/* logical delivery broadcast to all CPUs: */
.irq_dest_mode = 1,
.disable_esr = 0,
.dest_logical = APIC_DEST_LOGICAL,
.check_apicid_used = default_check_apicid_used,
.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,
.calc_dest_apicid = apic_flat_calc_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
};
|
