tests/qtest/device-plug-test.c

   1 /*
   2  * QEMU device plug/unplug handling
   3  *
   4  * Copyright (C) 2019 Red Hat Inc.
   5  *
   6  * Authors:
   7  *  David Hildenbrand <david@redhat.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "libqtest.h"
  15 #include "qapi/qmp/qdict.h"
  16 #include "qapi/qmp/qstring.h"
  17
  18 static void system_reset(QTestState *qtest)
  19 {
  20     QDict *resp;
  21
  22     resp = qtest_qmp(qtest, "{'execute': 'system_reset'}");
  23     g_assert(qdict_haskey(resp, "return"));
  24     qobject_unref(resp);
  25 }
  26
  27 static void wait_device_deleted_event(QTestState *qtest, const char *id)
  28 {
  29     QDict *resp, *data;
  30     QString *qstr;
  31
  32     /*
  33      * Other devices might get removed along with the removed device. Skip
  34      * these. The device of interest will be the last one.
  35      */
  36     for (;;) {
  37         resp = qtest_qmp_eventwait_ref(qtest, "DEVICE_DELETED");
  38         data = qdict_get_qdict(resp, "data");
  39         if (!data || !qdict_get(data, "device")) {
  40             qobject_unref(resp);
  41             continue;
  42         }
  43         qstr = qobject_to(QString, qdict_get(data, "device"));
  44         g_assert(qstr);
  45         if (!strcmp(qstring_get_str(qstr), id)) {
  46             qobject_unref(resp);
  47             break;
  48         }
  49         qobject_unref(resp);
  50     }
  51 }
  52
  53 static void process_device_remove(QTestState *qtest, const char *id)
  54 {
  55     /*
  56      * Request device removal. As the guest is not running, the request won't
  57      * be processed. However during system reset, the removal will be
  58      * handled, removing the device.
  59      */
  60     qtest_qmp_device_del_send(qtest, id);
  61     system_reset(qtest);
  62     wait_device_deleted_event(qtest, id);
  63 }
  64
  65 static void test_pci_unplug_request(void)
  66 {
  67     const char *arch = qtest_get_arch();
  68     const char *machine_addition = "";
  69
  70     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
  71         machine_addition = "-machine pc";
  72     }
  73
  74     QTestState *qtest = qtest_initf("%s -device virtio-mouse-pci,id=dev0",
  75                                     machine_addition);
  76
  77     process_device_remove(qtest, "dev0");
  78
  79     qtest_quit(qtest);
  80 }
  81
  82 static void test_q35_pci_unplug_request(void)
  83 {
  84
  85     QTestState *qtest = qtest_initf("-machine q35 "
  86                                     "-device pcie-root-port,id=p1 "
  87                                     "-device pcie-pci-bridge,bus=p1,id=b1 "
  88                                     "-device virtio-mouse-pci,bus=b1,id=dev0");
  89
  90     process_device_remove(qtest, "dev0");
  91
  92     qtest_quit(qtest);
  93 }
  94
  95 static void test_pci_unplug_json_request(void)
  96 {
  97     const char *arch = qtest_get_arch();
  98     const char *machine_addition = "";
  99
 100     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 101         machine_addition = "-machine pc";
 102     }
 103
 104     QTestState *qtest = qtest_initf(
 105         "%s -device \"{'driver': 'virtio-mouse-pci', 'id': 'dev0'}\"",
 106         machine_addition);
 107
 108     process_device_remove(qtest, "dev0");
 109
 110     qtest_quit(qtest);
 111 }
 112
 113 static void test_q35_pci_unplug_json_request(void)
 114 {
 115     const char *port = "-device \"{'driver': 'pcie-root-port', "
 116                                   "'id': 'p1'}\"";
 117
 118     const char *bridge = "-device \"{'driver': 'pcie-pci-bridge', "
 119                                     "'id': 'b1', "
 120                                     "'bus': 'p1'}\"";
 121
 122     const char *device = "-device \"{'driver': 'virtio-mouse-pci', "
 123                                     "'bus': 'b1', "
 124                                     "'id': 'dev0'}\"";
 125
 126     QTestState *qtest = qtest_initf("-machine q35 %s %s %s",
 127                                     port, bridge, device);
 128
 129     process_device_remove(qtest, "dev0");
 130
 131     qtest_quit(qtest);
 132 }
 133
 134 static void test_ccw_unplug(void)
 135 {
 136     QTestState *qtest = qtest_initf("-device virtio-balloon-ccw,id=dev0");
 137
 138     qtest_qmp_device_del_send(qtest, "dev0");
 139     wait_device_deleted_event(qtest, "dev0");
 140
 141     qtest_quit(qtest);
 142 }
 143
 144 static void test_spapr_cpu_unplug_request(void)
 145 {
 146     QTestState *qtest;
 147
 148     qtest = qtest_initf("-cpu power9_v2.0 -smp 1,maxcpus=2 "
 149                         "-device power9_v2.0-spapr-cpu-core,core-id=1,id=dev0");
 150
 151     /* similar to test_pci_unplug_request */
 152     process_device_remove(qtest, "dev0");
 153
 154     qtest_quit(qtest);
 155 }
 156
 157 static void test_spapr_memory_unplug_request(void)
 158 {
 159     QTestState *qtest;
 160
 161     qtest = qtest_initf("-m 256M,slots=1,maxmem=768M "
 162                         "-object memory-backend-ram,id=mem0,size=512M "
 163                         "-device pc-dimm,id=dev0,memdev=mem0");
 164
 165     /* similar to test_pci_unplug_request */
 166     process_device_remove(qtest, "dev0");
 167
 168     qtest_quit(qtest);
 169 }
 170
 171 static void test_spapr_phb_unplug_request(void)
 172 {
 173     QTestState *qtest;
 174
 175     qtest = qtest_initf("-device spapr-pci-host-bridge,index=1,id=dev0");
 176
 177     /* similar to test_pci_unplug_request */
 178     process_device_remove(qtest, "dev0");
 179
 180     qtest_quit(qtest);
 181 }
 182
 183 int main(int argc, char **argv)
 184 {
 185     const char *arch = qtest_get_arch();
 186
 187     g_test_init(&argc, &argv, NULL);
 188
 189     /*
 190      * We need a system that will process unplug requests during system resets
 191      * and does not do PCI surprise removal. This holds for x86 ACPI,
 192      * s390x and spapr.
 193      */
 194     qtest_add_func("/device-plug/pci-unplug-request",
 195                    test_pci_unplug_request);
 196     qtest_add_func("/device-plug/pci-unplug-json-request",
 197                    test_pci_unplug_json_request);
 198
 199     if (!strcmp(arch, "s390x")) {
 200         qtest_add_func("/device-plug/ccw-unplug",
 201                        test_ccw_unplug);
 202     }
 203
 204     if (!strcmp(arch, "ppc64")) {
 205         qtest_add_func("/device-plug/spapr-cpu-unplug-request",
 206                        test_spapr_cpu_unplug_request);
 207         qtest_add_func("/device-plug/spapr-memory-unplug-request",
 208                        test_spapr_memory_unplug_request);
 209         qtest_add_func("/device-plug/spapr-phb-unplug-request",
 210                        test_spapr_phb_unplug_request);
 211     }
 212
 213     if (!strcmp(arch, "x86_64") && qtest_has_machine("q35")) {
 214         qtest_add_func("/device-plug/q35-pci-unplug-request",
 215                    test_q35_pci_unplug_request);
 216         qtest_add_func("/device-plug/q35-pci-unplug-json-request",
 217                    test_q35_pci_unplug_json_request);
 218     }
 219
 220     return g_test_run();
 221 }