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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
// SPDX-License-Identifier: GPL-2.0
/*
* APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
*
* Drives the local APIC in "clustered mode".
*/
#include <linux/cpumask.h>
#include <linux/dmi.h>
#include <linux/smp.h>
#include <asm/apic.h>
#include <asm/io_apic.h>
#include "local.h"
static unsigned bigsmp_get_apic_id(unsigned long x)
{
return (x >> 24) & 0xFF;
}
static int bigsmp_apic_id_registered(void)
{
return 1;
}
static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
{
return false;
}
static int bigsmp_early_logical_apicid(int cpu)
{
/* on bigsmp, logical apicid is the same as physical */
return early_per_cpu(x86_cpu_to_apicid, cpu);
}
/*
* bigsmp enables physical destination mode
* and doesn't use LDR and DFR
*/
static void bigsmp_init_apic_ldr(void)
{
}
static void bigsmp_setup_apic_routing(void)
{
printk(KERN_INFO
"Enabling APIC mode: Physflat. Using %d I/O APICs\n",
nr_ioapics);
}
static int bigsmp_cpu_present_to_apicid(int mps_cpu)
{
if (mps_cpu < nr_cpu_ids)
return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
return BAD_APICID;
}
static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
{
/* For clustered we don't have a good way to do this yet - hack */
physids_promote(0xFFL, retmap);
}
static int bigsmp_check_phys_apicid_present(int phys_apicid)
{
return 1;
}
static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
{
return cpuid_apic >> index_msb;
}
static void bigsmp_send_IPI_allbutself(int vector)
{
default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
}
static void bigsmp_send_IPI_all(int vector)
{
default_send_IPI_mask_sequence_phys(cpu_online_mask, vector);
}
static int dmi_bigsmp; /* can be set by dmi scanners */
static int hp_ht_bigsmp(const struct dmi_system_id *d)
{
printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
dmi_bigsmp = 1;
return 0;
}
static const struct dmi_system_id bigsmp_dmi_table[] = {
{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
}
},
{ hp_ht_bigsmp, "HP ProLiant DL740",
{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
}
},
{ } /* NULL entry stops DMI scanning */
};
static int probe_bigsmp(void)
{
if (def_to_bigsmp)
dmi_bigsmp = 1;
else
dmi_check_system(bigsmp_dmi_table);
return dmi_bigsmp;
}
static struct apic apic_bigsmp __ro_after_init = {
.name = "bigsmp",
.probe = probe_bigsmp,
.acpi_madt_oem_check = NULL,
.apic_id_valid = default_apic_id_valid,
.apic_id_registered = bigsmp_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
.disable_esr = 1,
.check_apicid_used = bigsmp_check_apicid_used,
.init_apic_ldr = bigsmp_init_apic_ldr,
.ioapic_phys_id_map = bigsmp_ioapic_phys_id_map,
.setup_apic_routing = bigsmp_setup_apic_routing,
.cpu_present_to_apicid = bigsmp_cpu_present_to_apicid,
.apicid_to_cpu_present = physid_set_mask_of_physid,
.check_phys_apicid_present = bigsmp_check_phys_apicid_present,
.phys_pkg_id = bigsmp_phys_pkg_id,
.get_apic_id = bigsmp_get_apic_id,
.set_apic_id = NULL,
.calc_dest_apicid = apic_default_calc_apicid,
.send_IPI = default_send_IPI_single_phys,
.send_IPI_mask = default_send_IPI_mask_sequence_phys,
.send_IPI_mask_allbutself = NULL,
.send_IPI_allbutself = bigsmp_send_IPI_allbutself,
.send_IPI_all = bigsmp_send_IPI_all,
.send_IPI_self = default_send_IPI_self,
.inquire_remote_apic = default_inquire_remote_apic,
.read = native_apic_mem_read,
.write = native_apic_mem_write,
.eoi_write = native_apic_mem_write,
.icr_read = native_apic_icr_read,
.icr_write = native_apic_icr_write,
.wait_icr_idle = native_apic_wait_icr_idle,
.safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
.x86_32_early_logical_apicid = bigsmp_early_logical_apicid,
};
void __init generic_bigsmp_probe(void)
{
unsigned int cpu;
if (!probe_bigsmp())
return;
apic = &apic_bigsmp;
for_each_possible_cpu(cpu) {
if (early_per_cpu(x86_cpu_to_logical_apicid,
cpu) == BAD_APICID)
continue;
early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
bigsmp_early_logical_apicid(cpu);
}
pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
}
apic_driver(apic_bigsmp);
|
