jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1/*
2 * QEMU device hotplug helpers
3 *
4 * Copyright (c) 2004 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25#include "qemu/osdep.h"
26#include "hw/hw.h"
27#include "hw/boards.h"
28#include "sysemu/block-backend.h"
29#include "sysemu/blockdev.h"
30#include "qapi/qmp/qdict.h"
31#include "qemu/config-file.h"
32#include "qemu/option.h"
33#include "sysemu/sysemu.h"
34#include "monitor/monitor.h"
35#include "block/block_int.h"
36
37static DriveInfo *add_init_drive(const char *optstr)
38{
39 DriveInfo *dinfo;
40 QemuOpts *opts;
41 MachineClass *mc;
42
43 opts = drive_def(optstr);
44 if (!opts)
45 return NULL;
46
47 mc = MACHINE_GET_CLASS(current_machine);
48 dinfo = drive_new(opts, mc->block_default_type);
49 if (!dinfo) {
50 qemu_opts_del(opts);
51 return NULL;
52 }
53
54 return dinfo;
55}
56
57void hmp_drive_add(Monitor *mon, const QDict *qdict)
58{
59 DriveInfo *dinfo = NULL;
60 const char *opts = qdict_get_str(qdict, "opts");
61 bool node = qdict_get_try_bool(qdict, "node", false);
62
63 if (node) {
64 hmp_drive_add_node(mon, opts);
65 return;
66 }
67
68 dinfo = add_init_drive(opts);
69 if (!dinfo) {
70 goto err;
71 }
72 if (dinfo->devaddr) {
73 monitor_printf(mon, "Parameter addr not supported\n");
74 goto err;
75 }
76
77 switch (dinfo->type) {
78 case IF_NONE:
79 monitor_printf(mon, "OK\n");
80 break;
81 default:
82 monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
83 goto err;
84 }
85 return;
86
87err:
88 if (dinfo) {
89 BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
90 monitor_remove_blk(blk);
91 blk_unref(blk);
92 }
93}