Loading...
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
4 *
5 * Drives the local APIC in "clustered mode".
6 */
7#include <linux/cpumask.h>
8#include <linux/dmi.h>
9#include <linux/smp.h>
10
11#include <asm/apic.h>
12
13#include "local.h"
14
15static unsigned bigsmp_get_apic_id(unsigned long x)
16{
17 return (x >> 24) & 0xFF;
18}
19
20static int bigsmp_apic_id_registered(void)
21{
22 return 1;
23}
24
25static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
26{
27 return false;
28}
29
30static int bigsmp_early_logical_apicid(int cpu)
31{
32 /* on bigsmp, logical apicid is the same as physical */
33 return early_per_cpu(x86_cpu_to_apicid, cpu);
34}
35
36/*
37 * bigsmp enables physical destination mode
38 * and doesn't use LDR and DFR
39 */
40static void bigsmp_init_apic_ldr(void)
41{
42}
43
44static void bigsmp_setup_apic_routing(void)
45{
46 printk(KERN_INFO
47 "Enabling APIC mode: Physflat. Using %d I/O APICs\n",
48 nr_ioapics);
49}
50
51static int bigsmp_cpu_present_to_apicid(int mps_cpu)
52{
53 if (mps_cpu < nr_cpu_ids)
54 return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
55
56 return BAD_APICID;
57}
58
59static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
60{
61 /* For clustered we don't have a good way to do this yet - hack */
62 physids_promote(0xFFL, retmap);
63}
64
65static int bigsmp_check_phys_apicid_present(int phys_apicid)
66{
67 return 1;
68}
69
70static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
71{
72 return cpuid_apic >> index_msb;
73}
74
75static void bigsmp_send_IPI_allbutself(int vector)
76{
77 default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
78}
79
80static void bigsmp_send_IPI_all(int vector)
81{
82 default_send_IPI_mask_sequence_phys(cpu_online_mask, vector);
83}
84
85static int dmi_bigsmp; /* can be set by dmi scanners */
86
87static int hp_ht_bigsmp(const struct dmi_system_id *d)
88{
89 printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
90 dmi_bigsmp = 1;
91
92 return 0;
93}
94
95
96static const struct dmi_system_id bigsmp_dmi_table[] = {
97 { hp_ht_bigsmp, "HP ProLiant DL760 G2",
98 { DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
99 DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
100 }
101 },
102
103 { hp_ht_bigsmp, "HP ProLiant DL740",
104 { DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
105 DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
106 }
107 },
108 { } /* NULL entry stops DMI scanning */
109};
110
111static int probe_bigsmp(void)
112{
113 if (def_to_bigsmp)
114 dmi_bigsmp = 1;
115 else
116 dmi_check_system(bigsmp_dmi_table);
117
118 return dmi_bigsmp;
119}
120
121static struct apic apic_bigsmp __ro_after_init = {
122
123 .name = "bigsmp",
124 .probe = probe_bigsmp,
125 .acpi_madt_oem_check = NULL,
126 .apic_id_valid = default_apic_id_valid,
127 .apic_id_registered = bigsmp_apic_id_registered,
128
129 .irq_delivery_mode = dest_Fixed,
130 /* phys delivery to target CPU: */
131 .irq_dest_mode = 0,
132
133 .disable_esr = 1,
134 .dest_logical = 0,
135 .check_apicid_used = bigsmp_check_apicid_used,
136
137 .init_apic_ldr = bigsmp_init_apic_ldr,
138
139 .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map,
140 .setup_apic_routing = bigsmp_setup_apic_routing,
141 .cpu_present_to_apicid = bigsmp_cpu_present_to_apicid,
142 .apicid_to_cpu_present = physid_set_mask_of_physid,
143 .check_phys_apicid_present = bigsmp_check_phys_apicid_present,
144 .phys_pkg_id = bigsmp_phys_pkg_id,
145
146 .get_apic_id = bigsmp_get_apic_id,
147 .set_apic_id = NULL,
148
149 .calc_dest_apicid = apic_default_calc_apicid,
150
151 .send_IPI = default_send_IPI_single_phys,
152 .send_IPI_mask = default_send_IPI_mask_sequence_phys,
153 .send_IPI_mask_allbutself = NULL,
154 .send_IPI_allbutself = bigsmp_send_IPI_allbutself,
155 .send_IPI_all = bigsmp_send_IPI_all,
156 .send_IPI_self = default_send_IPI_self,
157
158 .inquire_remote_apic = default_inquire_remote_apic,
159
160 .read = native_apic_mem_read,
161 .write = native_apic_mem_write,
162 .eoi_write = native_apic_mem_write,
163 .icr_read = native_apic_icr_read,
164 .icr_write = native_apic_icr_write,
165 .wait_icr_idle = native_apic_wait_icr_idle,
166 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
167
168 .x86_32_early_logical_apicid = bigsmp_early_logical_apicid,
169};
170
171void __init generic_bigsmp_probe(void)
172{
173 unsigned int cpu;
174
175 if (!probe_bigsmp())
176 return;
177
178 apic = &apic_bigsmp;
179
180 for_each_possible_cpu(cpu) {
181 if (early_per_cpu(x86_cpu_to_logical_apicid,
182 cpu) == BAD_APICID)
183 continue;
184 early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
185 bigsmp_early_logical_apicid(cpu);
186 }
187
188 pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
189}
190
191apic_driver(apic_bigsmp);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
4 *
5 * Drives the local APIC in "clustered mode".
6 */
7#include <linux/cpumask.h>
8#include <linux/dmi.h>
9#include <linux/smp.h>
10
11#include <asm/apic.h>
12#include <asm/io_apic.h>
13
14#include "local.h"
15
16static u32 bigsmp_get_apic_id(u32 x)
17{
18 return (x >> 24) & 0xFF;
19}
20
21static bool bigsmp_check_apicid_used(physid_mask_t *map, u32 apicid)
22{
23 return false;
24}
25
26static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
27{
28 /* For clustered we don't have a good way to do this yet - hack */
29 physids_promote(0xFFL, retmap);
30}
31
32static u32 bigsmp_phys_pkg_id(u32 cpuid_apic, int index_msb)
33{
34 return cpuid_apic >> index_msb;
35}
36
37static void bigsmp_send_IPI_allbutself(int vector)
38{
39 default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
40}
41
42static void bigsmp_send_IPI_all(int vector)
43{
44 default_send_IPI_mask_sequence_phys(cpu_online_mask, vector);
45}
46
47static int dmi_bigsmp; /* can be set by dmi scanners */
48
49static int hp_ht_bigsmp(const struct dmi_system_id *d)
50{
51 printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
52 dmi_bigsmp = 1;
53
54 return 0;
55}
56
57
58static const struct dmi_system_id bigsmp_dmi_table[] = {
59 { hp_ht_bigsmp, "HP ProLiant DL760 G2",
60 { DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
61 DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
62 }
63 },
64
65 { hp_ht_bigsmp, "HP ProLiant DL740",
66 { DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
67 DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
68 }
69 },
70 { } /* NULL entry stops DMI scanning */
71};
72
73static int probe_bigsmp(void)
74{
75 return dmi_check_system(bigsmp_dmi_table);
76}
77
78static struct apic apic_bigsmp __ro_after_init = {
79
80 .name = "bigsmp",
81 .probe = probe_bigsmp,
82
83 .dest_mode_logical = false,
84
85 .disable_esr = 1,
86
87 .check_apicid_used = bigsmp_check_apicid_used,
88 .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map,
89 .cpu_present_to_apicid = default_cpu_present_to_apicid,
90 .phys_pkg_id = bigsmp_phys_pkg_id,
91
92 .max_apic_id = 0xFE,
93 .get_apic_id = bigsmp_get_apic_id,
94 .set_apic_id = NULL,
95
96 .calc_dest_apicid = apic_default_calc_apicid,
97
98 .send_IPI = default_send_IPI_single_phys,
99 .send_IPI_mask = default_send_IPI_mask_sequence_phys,
100 .send_IPI_mask_allbutself = NULL,
101 .send_IPI_allbutself = bigsmp_send_IPI_allbutself,
102 .send_IPI_all = bigsmp_send_IPI_all,
103 .send_IPI_self = default_send_IPI_self,
104
105 .read = native_apic_mem_read,
106 .write = native_apic_mem_write,
107 .eoi = native_apic_mem_eoi,
108 .icr_read = native_apic_icr_read,
109 .icr_write = native_apic_icr_write,
110 .wait_icr_idle = apic_mem_wait_icr_idle,
111 .safe_wait_icr_idle = apic_mem_wait_icr_idle_timeout,
112};
113
114bool __init apic_bigsmp_possible(bool cmdline_override)
115{
116 return apic == &apic_bigsmp || !cmdline_override;
117}
118
119void __init apic_bigsmp_force(void)
120{
121 if (apic != &apic_bigsmp)
122 apic_install_driver(&apic_bigsmp);
123}
124
125apic_driver(apic_bigsmp);