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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
521b82fe | 2 | |
2d9579a1 | 3 | #include <linux/cpumask.h> |
521b82fe | 4 | #include <linux/acpi.h> |
1b9b89e7 | 5 | |
c94f0718 | 6 | #include "local.h" |
2d9579a1 | 7 | |
ef1f87aa | 8 | int x2apic_phys; |
1b9b89e7 | 9 | |
1a8880a1 | 10 | static struct apic apic_x2apic_phys; |
26573a97 DW |
11 | static u32 x2apic_max_apicid __ro_after_init; |
12 | ||
13 | void __init x2apic_set_max_apicid(u32 apicid) | |
14 | { | |
15 | x2apic_max_apicid = apicid; | |
16 | } | |
1a8880a1 | 17 | |
afed7d17 | 18 | static int __init set_x2apic_phys_mode(char *arg) |
1b9b89e7 YL |
19 | { |
20 | x2apic_phys = 1; | |
21 | return 0; | |
22 | } | |
23 | early_param("x2apic_phys", set_x2apic_phys_mode); | |
24 | ||
cb214ede | 25 | static bool x2apic_fadt_phys(void) |
1b9b89e7 | 26 | { |
781674fc | 27 | #ifdef CONFIG_ACPI |
cb214ede SW |
28 | if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) && |
29 | (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) { | |
ea0dcf90 | 30 | printk(KERN_DEBUG "System requires x2apic physical mode\n"); |
cb214ede | 31 | return true; |
ea0dcf90 | 32 | } |
781674fc | 33 | #endif |
cb214ede SW |
34 | return false; |
35 | } | |
36 | ||
37 | static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id) | |
38 | { | |
39 | return x2apic_enabled() && (x2apic_phys || x2apic_fadt_phys()); | |
1b9b89e7 | 40 | } |
2d9579a1 | 41 | |
f2bffe8a TG |
42 | static void x2apic_send_IPI(int cpu, int vector) |
43 | { | |
44 | u32 dest = per_cpu(x86_cpu_to_apicid, cpu); | |
45 | ||
25a068b8 DH |
46 | /* x2apic MSRs are special and need a special fence: */ |
47 | weak_wrmsr_fence(); | |
f2bffe8a TG |
48 | __x2apic_send_IPI_dest(dest, vector, APIC_DEST_PHYSICAL); |
49 | } | |
50 | ||
a27d0b5e SS |
51 | static void |
52 | __x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest) | |
2d9579a1 | 53 | { |
2d9579a1 | 54 | unsigned long query_cpu; |
a27d0b5e | 55 | unsigned long this_cpu; |
dac5f412 | 56 | unsigned long flags; |
2d9579a1 | 57 | |
25a068b8 DH |
58 | /* x2apic MSRs are special and need a special fence: */ |
59 | weak_wrmsr_fence(); | |
ce4e240c | 60 | |
2d9579a1 | 61 | local_irq_save(flags); |
a27d0b5e SS |
62 | |
63 | this_cpu = smp_processor_id(); | |
bcda016e | 64 | for_each_cpu(query_cpu, mask) { |
a27d0b5e SS |
65 | if (apic_dest == APIC_DEST_ALLBUT && this_cpu == query_cpu) |
66 | continue; | |
2d9579a1 SS |
67 | __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu), |
68 | vector, APIC_DEST_PHYSICAL); | |
69 | } | |
70 | local_irq_restore(flags); | |
71 | } | |
72 | ||
a27d0b5e SS |
73 | static void x2apic_send_IPI_mask(const struct cpumask *mask, int vector) |
74 | { | |
75 | __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLINC); | |
76 | } | |
77 | ||
dac5f412 IM |
78 | static void |
79 | x2apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector) | |
2d9579a1 | 80 | { |
a27d0b5e | 81 | __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLBUT); |
e7986739 | 82 | } |
2d9579a1 | 83 | |
e7986739 MT |
84 | static void x2apic_send_IPI_allbutself(int vector) |
85 | { | |
43931d35 | 86 | __x2apic_send_IPI_shorthand(vector, APIC_DEST_ALLBUT); |
2d9579a1 SS |
87 | } |
88 | ||
89 | static void x2apic_send_IPI_all(int vector) | |
90 | { | |
43931d35 | 91 | __x2apic_send_IPI_shorthand(vector, APIC_DEST_ALLINC); |
2d9579a1 SS |
92 | } |
93 | ||
4d08d97f | 94 | static void init_x2apic_ldr(void) |
2d9579a1 | 95 | { |
2d9579a1 SS |
96 | } |
97 | ||
9ebd680b SS |
98 | static int x2apic_phys_probe(void) |
99 | { | |
cb214ede | 100 | if (x2apic_mode && (x2apic_phys || x2apic_fadt_phys())) |
9ebd680b SS |
101 | return 1; |
102 | ||
103 | return apic == &apic_x2apic_phys; | |
104 | } | |
105 | ||
981c2eac | 106 | /* Common x2apic functions, also used by x2apic_cluster */ |
a774635d | 107 | int x2apic_apic_id_valid(u32 apicid) |
981c2eac | 108 | { |
26573a97 DW |
109 | if (x2apic_max_apicid && apicid > x2apic_max_apicid) |
110 | return 0; | |
111 | ||
981c2eac TG |
112 | return 1; |
113 | } | |
114 | ||
115 | int x2apic_apic_id_registered(void) | |
116 | { | |
117 | return 1; | |
118 | } | |
119 | ||
120 | void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest) | |
121 | { | |
122 | unsigned long cfg = __prepare_ICR(0, vector, dest); | |
123 | native_x2apic_icr_write(cfg, apicid); | |
124 | } | |
125 | ||
43931d35 TG |
126 | void __x2apic_send_IPI_shorthand(int vector, u32 which) |
127 | { | |
128 | unsigned long cfg = __prepare_ICR(which, vector, 0); | |
129 | ||
25a068b8 DH |
130 | /* x2apic MSRs are special and need a special fence: */ |
131 | weak_wrmsr_fence(); | |
43931d35 TG |
132 | native_x2apic_icr_write(cfg, 0); |
133 | } | |
134 | ||
981c2eac TG |
135 | unsigned int x2apic_get_apic_id(unsigned long id) |
136 | { | |
137 | return id; | |
138 | } | |
139 | ||
727657e6 | 140 | u32 x2apic_set_apic_id(unsigned int id) |
981c2eac TG |
141 | { |
142 | return id; | |
143 | } | |
144 | ||
145 | int x2apic_phys_pkg_id(int initial_apicid, int index_msb) | |
146 | { | |
147 | return initial_apicid >> index_msb; | |
148 | } | |
149 | ||
150 | void x2apic_send_IPI_self(int vector) | |
151 | { | |
152 | apic_write(APIC_SELF_IPI, vector); | |
153 | } | |
154 | ||
404f6aac | 155 | static struct apic apic_x2apic_phys __ro_after_init = { |
05c155c2 IM |
156 | |
157 | .name = "physical x2apic", | |
9ebd680b | 158 | .probe = x2apic_phys_probe, |
05c155c2 | 159 | .acpi_madt_oem_check = x2apic_acpi_madt_oem_check, |
b7157acf | 160 | .apic_id_valid = x2apic_apic_id_valid, |
05c155c2 IM |
161 | .apic_id_registered = x2apic_apic_id_registered, |
162 | ||
72161299 | 163 | .delivery_mode = APIC_DELIVERY_MODE_FIXED, |
8c44963b | 164 | .dest_mode_logical = false, |
05c155c2 | 165 | |
08125d3e | 166 | .disable_esr = 0, |
05c155c2 | 167 | |
e57d04e5 | 168 | .check_apicid_used = NULL, |
05c155c2 | 169 | .init_apic_ldr = init_x2apic_ldr, |
05c155c2 IM |
170 | .ioapic_phys_id_map = NULL, |
171 | .setup_apic_routing = NULL, | |
a21769a4 | 172 | .cpu_present_to_apicid = default_cpu_present_to_apicid, |
05c155c2 | 173 | .apicid_to_cpu_present = NULL, |
a27a6210 | 174 | .check_phys_apicid_present = default_check_phys_apicid_present, |
d4c9a9f3 | 175 | .phys_pkg_id = x2apic_phys_pkg_id, |
05c155c2 | 176 | |
79deb8e5 CG |
177 | .get_apic_id = x2apic_get_apic_id, |
178 | .set_apic_id = x2apic_set_apic_id, | |
05c155c2 | 179 | |
9f9e3bb1 | 180 | .calc_dest_apicid = apic_default_calc_apicid, |
05c155c2 | 181 | |
f2bffe8a | 182 | .send_IPI = x2apic_send_IPI, |
05c155c2 IM |
183 | .send_IPI_mask = x2apic_send_IPI_mask, |
184 | .send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself, | |
185 | .send_IPI_allbutself = x2apic_send_IPI_allbutself, | |
186 | .send_IPI_all = x2apic_send_IPI_all, | |
187 | .send_IPI_self = x2apic_send_IPI_self, | |
188 | ||
05c155c2 | 189 | .inquire_remote_apic = NULL, |
c1eeb2de YL |
190 | |
191 | .read = native_apic_msr_read, | |
192 | .write = native_apic_msr_write, | |
0ab711ae | 193 | .eoi_write = native_apic_msr_eoi_write, |
c1eeb2de YL |
194 | .icr_read = native_x2apic_icr_read, |
195 | .icr_write = native_x2apic_icr_write, | |
196 | .wait_icr_idle = native_x2apic_wait_icr_idle, | |
197 | .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle, | |
2d9579a1 | 198 | }; |
107e0e0c SS |
199 | |
200 | apic_driver(apic_x2apic_phys); |