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1 | #ifndef LTTNG_CPUHOTPLUG_H |
2 | #define LTTNG_CPUHOTPLUG_H | |
3 | ||
4 | /* | |
5 | * lttng-cpuhotplug.h | |
6 | * | |
7 | * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; only | |
12 | * version 2.1 of the License. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
23 | ||
24 | #include <linux/cpuhotplug.h> | |
25 | ||
26 | struct lttng_cpuhp_node; | |
27 | ||
28 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) | |
29 | enum lttng_cpuhp_component { | |
30 | LTTNG_RING_BUFFER_FRONTEND, | |
31 | LTTNG_RING_BUFFER_BACKEND, | |
32 | LTTNG_RING_BUFFER_ITER, | |
33 | LTTNG_CONTEXT_PERF_COUNTERS, | |
34 | }; | |
35 | ||
36 | struct lttng_cpuhp_node { | |
37 | enum lttng_cpuhp_component component; | |
38 | struct hlist_node node; | |
39 | }; | |
40 | ||
41 | extern enum cpuhp_state lttng_hp_prepare; | |
42 | extern enum cpuhp_state lttng_hp_online; | |
43 | ||
44 | int lttng_cpuhp_rb_backend_prepare(unsigned int cpu, | |
45 | struct lttng_cpuhp_node *node); | |
46 | int lttng_cpuhp_rb_frontend_dead(unsigned int cpu, | |
47 | struct lttng_cpuhp_node *node); | |
48 | int lttng_cpuhp_rb_frontend_online(unsigned int cpu, | |
49 | struct lttng_cpuhp_node *node); | |
50 | int lttng_cpuhp_rb_frontend_offline(unsigned int cpu, | |
51 | struct lttng_cpuhp_node *node); | |
52 | int lttng_cpuhp_rb_iter_online(unsigned int cpu, | |
53 | struct lttng_cpuhp_node *node); | |
54 | ||
55 | /* Ring buffer is a separate library. */ | |
56 | void lttng_rb_set_hp_prepare(enum cpuhp_state val); | |
57 | void lttng_rb_set_hp_online(enum cpuhp_state val); | |
58 | ||
59 | extern enum cpuhp_state lttng_rb_hp_prepare; | |
60 | extern enum cpuhp_state lttng_rb_hp_online; | |
61 | ||
62 | #endif | |
63 | ||
64 | #endif /* LTTNG_CPUHOTPLUG_H */ |