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54cb65d8 EC |
1 | /* |
2 | * Plugin Shared Internal Functions | |
3 | * | |
4 | * Copyright (C) 2019, Linaro | |
5 | * | |
6 | * License: GNU GPL, version 2 or later. | |
7 | * See the COPYING file in the top-level directory. | |
8 | * | |
9 | * SPDX-License-Identifier: GPL-2.0-or-later | |
10 | */ | |
11 | ||
52581c71 MA |
12 | #ifndef PLUGIN_H |
13 | #define PLUGIN_H | |
54cb65d8 EC |
14 | |
15 | #include <gmodule.h> | |
824f4bac | 16 | #include "qemu/qht.h" |
54cb65d8 | 17 | |
3fb356cc AB |
18 | #define QEMU_PLUGIN_MIN_VERSION 0 |
19 | ||
54cb65d8 EC |
20 | /* global state */ |
21 | struct qemu_plugin_state { | |
22 | QTAILQ_HEAD(, qemu_plugin_ctx) ctxs; | |
23 | QLIST_HEAD(, qemu_plugin_cb) cb_lists[QEMU_PLUGIN_EV_MAX]; | |
24 | /* | |
25 | * Use the HT as a hash map by inserting k == v, which saves memory as | |
26 | * documented by GLib. The parent struct is obtained with container_of(). | |
27 | */ | |
28 | GHashTable *id_ht; | |
29 | /* | |
30 | * Use the HT as a hash map. Note that we could use a list here, | |
31 | * but with the HT we avoid adding a field to CPUState. | |
32 | */ | |
33 | GHashTable *cpu_ht; | |
34 | DECLARE_BITMAP(mask, QEMU_PLUGIN_EV_MAX); | |
35 | /* | |
36 | * @lock protects the struct as well as ctx->uninstalling. | |
37 | * The lock must be acquired by all API ops. | |
38 | * The lock is recursive, which greatly simplifies things, e.g. | |
39 | * callback registration from qemu_plugin_vcpu_for_each(). | |
40 | */ | |
41 | QemuRecMutex lock; | |
42 | /* | |
43 | * HT of callbacks invoked from helpers. All entries are freed when | |
44 | * the code cache is flushed. | |
45 | */ | |
46 | struct qht dyn_cb_arr_ht; | |
47 | }; | |
48 | ||
49 | ||
50 | struct qemu_plugin_ctx { | |
51 | GModule *handle; | |
52 | qemu_plugin_id_t id; | |
53 | struct qemu_plugin_cb *callbacks[QEMU_PLUGIN_EV_MAX]; | |
54 | QTAILQ_ENTRY(qemu_plugin_ctx) entry; | |
55 | /* | |
56 | * keep a reference to @desc until uninstall, so that plugins do not have | |
57 | * to strdup plugin args. | |
58 | */ | |
59 | struct qemu_plugin_desc *desc; | |
60 | bool installing; | |
61 | bool uninstalling; | |
62 | bool resetting; | |
63 | }; | |
64 | ||
65 | struct qemu_plugin_ctx *plugin_id_to_ctx_locked(qemu_plugin_id_t id); | |
66 | ||
67 | void plugin_register_inline_op(GArray **arr, | |
68 | enum qemu_plugin_mem_rw rw, | |
69 | enum qemu_plugin_op op, void *ptr, | |
70 | uint64_t imm); | |
71 | ||
72 | void plugin_reset_uninstall(qemu_plugin_id_t id, | |
73 | qemu_plugin_simple_cb_t cb, | |
74 | bool reset); | |
75 | ||
76 | void plugin_register_cb(qemu_plugin_id_t id, enum qemu_plugin_event ev, | |
77 | void *func); | |
78 | ||
79 | void plugin_unregister_cb__locked(struct qemu_plugin_ctx *ctx, | |
80 | enum qemu_plugin_event ev); | |
81 | ||
82 | void | |
83 | plugin_register_cb_udata(qemu_plugin_id_t id, enum qemu_plugin_event ev, | |
84 | void *func, void *udata); | |
85 | ||
86 | void | |
87 | plugin_register_dyn_cb__udata(GArray **arr, | |
88 | qemu_plugin_vcpu_udata_cb_t cb, | |
89 | enum qemu_plugin_cb_flags flags, void *udata); | |
90 | ||
91 | ||
92 | void plugin_register_vcpu_mem_cb(GArray **arr, | |
93 | void *cb, | |
94 | enum qemu_plugin_cb_flags flags, | |
95 | enum qemu_plugin_mem_rw rw, | |
96 | void *udata); | |
97 | ||
98 | void exec_inline_op(struct qemu_plugin_dyn_cb *cb); | |
99 | ||
52581c71 | 100 | #endif /* PLUGIN_H */ |