4a448b148c
We now keep track of how many vcpus were started. This way, a plugin can easily query number of any vcpus at any point of execution, which unifies user and system mode workflows. Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240213094009.150349-3-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-17-alex.bennee@linaro.org>
105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/*
|
|
* Plugin Shared Internal Functions
|
|
*
|
|
* Copyright (C) 2019, Linaro
|
|
*
|
|
* License: GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#ifndef PLUGIN_H
|
|
#define PLUGIN_H
|
|
|
|
#include <gmodule.h>
|
|
#include "qemu/qht.h"
|
|
|
|
#define QEMU_PLUGIN_MIN_VERSION 2
|
|
|
|
/* global state */
|
|
struct qemu_plugin_state {
|
|
QTAILQ_HEAD(, qemu_plugin_ctx) ctxs;
|
|
QLIST_HEAD(, qemu_plugin_cb) cb_lists[QEMU_PLUGIN_EV_MAX];
|
|
/*
|
|
* Use the HT as a hash map by inserting k == v, which saves memory as
|
|
* documented by GLib. The parent struct is obtained with container_of().
|
|
*/
|
|
GHashTable *id_ht;
|
|
/*
|
|
* Use the HT as a hash map. Note that we could use a list here,
|
|
* but with the HT we avoid adding a field to CPUState.
|
|
*/
|
|
GHashTable *cpu_ht;
|
|
DECLARE_BITMAP(mask, QEMU_PLUGIN_EV_MAX);
|
|
/*
|
|
* @lock protects the struct as well as ctx->uninstalling.
|
|
* The lock must be acquired by all API ops.
|
|
* The lock is recursive, which greatly simplifies things, e.g.
|
|
* callback registration from qemu_plugin_vcpu_for_each().
|
|
*/
|
|
QemuRecMutex lock;
|
|
/*
|
|
* HT of callbacks invoked from helpers. All entries are freed when
|
|
* the code cache is flushed.
|
|
*/
|
|
struct qht dyn_cb_arr_ht;
|
|
/* How many vcpus were started */
|
|
int num_vcpus;
|
|
};
|
|
|
|
|
|
struct qemu_plugin_ctx {
|
|
GModule *handle;
|
|
qemu_plugin_id_t id;
|
|
struct qemu_plugin_cb *callbacks[QEMU_PLUGIN_EV_MAX];
|
|
QTAILQ_ENTRY(qemu_plugin_ctx) entry;
|
|
/*
|
|
* keep a reference to @desc until uninstall, so that plugins do not have
|
|
* to strdup plugin args.
|
|
*/
|
|
struct qemu_plugin_desc *desc;
|
|
bool installing;
|
|
bool uninstalling;
|
|
bool resetting;
|
|
};
|
|
|
|
struct qemu_plugin_ctx *plugin_id_to_ctx_locked(qemu_plugin_id_t id);
|
|
|
|
void plugin_register_inline_op(GArray **arr,
|
|
enum qemu_plugin_mem_rw rw,
|
|
enum qemu_plugin_op op, void *ptr,
|
|
uint64_t imm);
|
|
|
|
void plugin_reset_uninstall(qemu_plugin_id_t id,
|
|
qemu_plugin_simple_cb_t cb,
|
|
bool reset);
|
|
|
|
void plugin_register_cb(qemu_plugin_id_t id, enum qemu_plugin_event ev,
|
|
void *func);
|
|
|
|
void plugin_unregister_cb__locked(struct qemu_plugin_ctx *ctx,
|
|
enum qemu_plugin_event ev);
|
|
|
|
void
|
|
plugin_register_cb_udata(qemu_plugin_id_t id, enum qemu_plugin_event ev,
|
|
void *func, void *udata);
|
|
|
|
void
|
|
plugin_register_dyn_cb__udata(GArray **arr,
|
|
qemu_plugin_vcpu_udata_cb_t cb,
|
|
enum qemu_plugin_cb_flags flags, void *udata);
|
|
|
|
|
|
void plugin_register_vcpu_mem_cb(GArray **arr,
|
|
void *cb,
|
|
enum qemu_plugin_cb_flags flags,
|
|
enum qemu_plugin_mem_rw rw,
|
|
void *udata);
|
|
|
|
void exec_inline_op(struct qemu_plugin_dyn_cb *cb);
|
|
|
|
int plugin_num_vcpus(void);
|
|
|
|
#endif /* PLUGIN_H */
|