cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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plugin.h (3085B)

      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#include "qemu/qht.h"
     17
     18#define QEMU_PLUGIN_MIN_VERSION 0
     19
     20/* global state */
     21struct 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
     50struct 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
     65struct qemu_plugin_ctx *plugin_id_to_ctx_locked(qemu_plugin_id_t id);
     66
     67void 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
     72void plugin_reset_uninstall(qemu_plugin_id_t id,
     73                            qemu_plugin_simple_cb_t cb,
     74                            bool reset);
     75
     76void plugin_register_cb(qemu_plugin_id_t id, enum qemu_plugin_event ev,
     77                        void *func);
     78
     79void plugin_unregister_cb__locked(struct qemu_plugin_ctx *ctx,
     80                                  enum qemu_plugin_event ev);
     81
     82void
     83plugin_register_cb_udata(qemu_plugin_id_t id, enum qemu_plugin_event ev,
     84                         void *func, void *udata);
     85
     86void
     87plugin_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
     92void 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
     98void exec_inline_op(struct qemu_plugin_dyn_cb *cb);
     99
    100#endif /* _PLUGIN_INTERNAL_H_ */