Commit | Line | Data |
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644e9cbb | 1 | #include <asm/cpu_device_id.h> |
cd4d09ec | 2 | #include <asm/cpufeature.h> |
644e9cbb | 3 | #include <linux/cpu.h> |
186f4360 | 4 | #include <linux/export.h> |
fad12ac8 | 5 | #include <linux/slab.h> |
644e9cbb AK |
6 | |
7 | /** | |
8 | * x86_match_cpu - match current CPU again an array of x86_cpu_ids | |
9 | * @match: Pointer to array of x86_cpu_ids. Last entry terminated with | |
10 | * {}. | |
11 | * | |
12 | * Return the entry if the current CPU matches the entries in the | |
13 | * passed x86_cpu_id match table. Otherwise NULL. The match table | |
14 | * contains vendor (X86_VENDOR_*), family, model and feature bits or | |
15 | * respective wildcard entries. | |
16 | * | |
17 | * A typical table entry would be to match a specific CPU | |
18 | * { X86_VENDOR_INTEL, 6, 0x12 } | |
19 | * or to match a specific CPU feature | |
20 | * { X86_FEATURE_MATCH(X86_FEATURE_FOOBAR) } | |
21 | * | |
22 | * Fields can be wildcarded with %X86_VENDOR_ANY, %X86_FAMILY_ANY, | |
23 | * %X86_MODEL_ANY, %X86_FEATURE_ANY or 0 (except for vendor) | |
24 | * | |
25 | * Arrays used to match for this should also be declared using | |
a7e0e4e9 | 26 | * MODULE_DEVICE_TABLE(x86cpu, ...) |
644e9cbb AK |
27 | * |
28 | * This always matches against the boot cpu, assuming models and features are | |
29 | * consistent over all CPUs. | |
30 | */ | |
31 | const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match) | |
32 | { | |
33 | const struct x86_cpu_id *m; | |
34 | struct cpuinfo_x86 *c = &boot_cpu_data; | |
35 | ||
36 | for (m = match; m->vendor | m->family | m->model | m->feature; m++) { | |
37 | if (m->vendor != X86_VENDOR_ANY && c->x86_vendor != m->vendor) | |
38 | continue; | |
39 | if (m->family != X86_FAMILY_ANY && c->x86 != m->family) | |
40 | continue; | |
41 | if (m->model != X86_MODEL_ANY && c->x86_model != m->model) | |
42 | continue; | |
43 | if (m->feature != X86_FEATURE_ANY && !cpu_has(c, m->feature)) | |
44 | continue; | |
45 | return m; | |
46 | } | |
47 | return NULL; | |
48 | } | |
49 | EXPORT_SYMBOL(x86_match_cpu); |