tests/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 <[email protected]>
   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 device_del_start(QTestState *qtest, const char *id)
  19 {
  20     qtest_qmp_send(qtest,
  21                    "{'execute': 'device_del', 'arguments': { 'id': %s } }", id);
  22 }
  23
  24 static void device_del_finish(QTestState *qtest)
  25 {
  26     QDict *resp = qtest_qmp_receive(qtest);
  27
  28     g_assert(qdict_haskey(resp, "return"));
  29     qobject_unref(resp);
  30 }
  31
  32 static void device_del_request(QTestState *qtest, const char *id)
  33 {
  34     device_del_start(qtest, id);
  35     device_del_finish(qtest);
  36 }
  37
  38 static void system_reset(QTestState *qtest)
  39 {
  40     QDict *resp;
  41
  42     resp = qtest_qmp(qtest, "{'execute': 'system_reset'}");
  43     g_assert(qdict_haskey(resp, "return"));
  44     qobject_unref(resp);
  45 }
  46
  47 static void wait_device_deleted_event(QTestState *qtest, const char *id)
  48 {
  49     QDict *resp, *data;
  50     QString *qstr;
  51
  52     /*
  53      * Other devices might get removed along with the removed device. Skip
  54      * these. The device of interest will be the last one.
  55      */
  56     for (;;) {
  57         resp = qtest_qmp_eventwait_ref(qtest, "DEVICE_DELETED");
  58         data = qdict_get_qdict(resp, "data");
  59         if (!data || !qdict_get(data, "device")) {
  60             qobject_unref(resp);
  61             continue;
  62         }
  63         qstr = qobject_to(QString, qdict_get(data, "device"));
  64         g_assert(qstr);
  65         if (!strcmp(qstring_get_str(qstr), id)) {
  66             qobject_unref(resp);
  67             break;
  68         }
  69         qobject_unref(resp);
  70     }
  71 }
  72
  73 static void test_pci_unplug_request(void)
  74 {
  75     QTestState *qtest = qtest_initf("-device virtio-mouse-pci,id=dev0");
  76
  77     /*
  78      * Request device removal. As the guest is not running, the request won't
  79      * be processed. However during system reset, the removal will be
  80      * handled, removing the device.
  81      */
  82     device_del_request(qtest, "dev0");
  83     system_reset(qtest);
  84     wait_device_deleted_event(qtest, "dev0");
  85
  86     qtest_quit(qtest);
  87 }
  88
  89 static void test_ccw_unplug(void)
  90 {
  91     QTestState *qtest = qtest_initf("-device virtio-balloon-ccw,id=dev0");
  92
  93     /*
  94      * The DEVICE_DELETED events will be sent before the command
  95      * completes.
  96      */
  97     device_del_start(qtest, "dev0");
  98     wait_device_deleted_event(qtest, "dev0");
  99     device_del_finish(qtest);
 100
 101     qtest_quit(qtest);
 102 }
 103
 104 static void test_spapr_cpu_unplug_request(void)
 105 {
 106     QTestState *qtest;
 107
 108     qtest = qtest_initf("-cpu power9_v2.0 -smp 1,maxcpus=2 "
 109                         "-device power9_v2.0-spapr-cpu-core,core-id=1,id=dev0");
 110
 111     /* similar to test_pci_unplug_request */
 112     device_del_request(qtest, "dev0");
 113     system_reset(qtest);
 114     wait_device_deleted_event(qtest, "dev0");
 115
 116     qtest_quit(qtest);
 117 }
 118
 119 static void test_spapr_memory_unplug_request(void)
 120 {
 121     QTestState *qtest;
 122
 123     qtest = qtest_initf("-m 256M,slots=1,maxmem=768M "
 124                         "-object memory-backend-ram,id=mem0,size=512M "
 125                         "-device pc-dimm,id=dev0,memdev=mem0");
 126
 127     /* similar to test_pci_unplug_request */
 128     device_del_request(qtest, "dev0");
 129     system_reset(qtest);
 130     wait_device_deleted_event(qtest, "dev0");
 131
 132     qtest_quit(qtest);
 133 }
 134
 135 static void test_spapr_phb_unplug_request(void)
 136 {
 137     QTestState *qtest;
 138
 139     qtest = qtest_initf("-device spapr-pci-host-bridge,index=1,id=dev0");
 140
 141     /* similar to test_pci_unplug_request */
 142     device_del_request(qtest, "dev0");
 143     system_reset(qtest);
 144     wait_device_deleted_event(qtest, "dev0");
 145
 146     qtest_quit(qtest);
 147 }
 148
 149 int main(int argc, char **argv)
 150 {
 151     const char *arch = qtest_get_arch();
 152
 153     g_test_init(&argc, &argv, NULL);
 154
 155     /*
 156      * We need a system that will process unplug requests during system resets
 157      * and does not do PCI surprise removal. This holds for x86 ACPI,
 158      * s390x and spapr.
 159      */
 160     qtest_add_func("/device-plug/pci-unplug-request",
 161                    test_pci_unplug_request);
 162
 163     if (!strcmp(arch, "s390x")) {
 164         qtest_add_func("/device-plug/ccw-unplug",
 165                        test_ccw_unplug);
 166     }
 167
 168     if (!strcmp(arch, "ppc64")) {
 169         qtest_add_func("/device-plug/spapr-cpu-unplug-request",
 170                        test_spapr_cpu_unplug_request);
 171         qtest_add_func("/device-plug/spapr-memory-unplug-request",
 172                        test_spapr_memory_unplug_request);
 173         qtest_add_func("/device-plug/spapr-phb-unplug-request",
 174                        test_spapr_phb_unplug_request);
 175     }
 176
 177     return g_test_run();
 178 }