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