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 "libqos/libqtest.h" 15 #include "qapi/qmp/qdict.h" 16 #include "qapi/qmp/qstring.h" 17 18 static void device_del(QTestState *qtest, const char *id) 19 { 20 QDict *resp; 21 22 resp = qtest_qmp(qtest, 23 "{'execute': 'device_del', 'arguments': { 'id': %s } }", id); 24 25 g_assert(qdict_haskey(resp, "return")); 26 qobject_unref(resp); 27 } 28 29 static void system_reset(QTestState *qtest) 30 { 31 QDict *resp; 32 33 resp = qtest_qmp(qtest, "{'execute': 'system_reset'}"); 34 g_assert(qdict_haskey(resp, "return")); 35 qobject_unref(resp); 36 } 37 38 static void wait_device_deleted_event(QTestState *qtest, const char *id) 39 { 40 QDict *resp, *data; 41 QString *qstr; 42 43 /* 44 * Other devices might get removed along with the removed device. Skip 45 * these. The device of interest will be the last one. 46 */ 47 for (;;) { 48 resp = qtest_qmp_eventwait_ref(qtest, "DEVICE_DELETED"); 49 data = qdict_get_qdict(resp, "data"); 50 if (!data || !qdict_get(data, "device")) { 51 qobject_unref(resp); 52 continue; 53 } 54 qstr = qobject_to(QString, qdict_get(data, "device")); 55 g_assert(qstr); 56 if (!strcmp(qstring_get_str(qstr), id)) { 57 qobject_unref(resp); 58 break; 59 } 60 qobject_unref(resp); 61 } 62 } 63 64 static void test_pci_unplug_request(void) 65 { 66 QTestState *qtest = qtest_initf("-device virtio-mouse-pci,id=dev0"); 67 68 /* 69 * Request device removal. As the guest is not running, the request won't 70 * be processed. However during system reset, the removal will be 71 * handled, removing the device. 72 */ 73 device_del(qtest, "dev0"); 74 system_reset(qtest); 75 wait_device_deleted_event(qtest, "dev0"); 76 77 qtest_quit(qtest); 78 } 79 80 static void test_pci_unplug_json_request(void) 81 { 82 QTestState *qtest = qtest_initf( 83 "-device '{\"driver\": \"virtio-mouse-pci\", \"id\": \"dev0\"}'"); 84 85 /* 86 * Request device removal. As the guest is not running, the request won't 87 * be processed. However during system reset, the removal will be 88 * handled, removing the device. 89 */ 90 device_del(qtest, "dev0"); 91 system_reset(qtest); 92 wait_device_deleted_event(qtest, "dev0"); 93 94 qtest_quit(qtest); 95 } 96 97 static void test_ccw_unplug(void) 98 { 99 QTestState *qtest = qtest_initf("-device virtio-balloon-ccw,id=dev0"); 100 101 device_del(qtest, "dev0"); 102 wait_device_deleted_event(qtest, "dev0"); 103 104 qtest_quit(qtest); 105 } 106 107 static void test_spapr_cpu_unplug_request(void) 108 { 109 QTestState *qtest; 110 111 qtest = qtest_initf("-cpu power9_v2.0 -smp 1,maxcpus=2 " 112 "-device power9_v2.0-spapr-cpu-core,core-id=1,id=dev0"); 113 114 /* similar to test_pci_unplug_request */ 115 device_del(qtest, "dev0"); 116 system_reset(qtest); 117 wait_device_deleted_event(qtest, "dev0"); 118 119 qtest_quit(qtest); 120 } 121 122 static void test_spapr_memory_unplug_request(void) 123 { 124 QTestState *qtest; 125 126 qtest = qtest_initf("-m 256M,slots=1,maxmem=768M " 127 "-object memory-backend-ram,id=mem0,size=512M " 128 "-device pc-dimm,id=dev0,memdev=mem0"); 129 130 /* similar to test_pci_unplug_request */ 131 device_del(qtest, "dev0"); 132 system_reset(qtest); 133 wait_device_deleted_event(qtest, "dev0"); 134 135 qtest_quit(qtest); 136 } 137 138 static void test_spapr_phb_unplug_request(void) 139 { 140 QTestState *qtest; 141 142 qtest = qtest_initf("-device spapr-pci-host-bridge,index=1,id=dev0"); 143 144 /* similar to test_pci_unplug_request */ 145 device_del(qtest, "dev0"); 146 system_reset(qtest); 147 wait_device_deleted_event(qtest, "dev0"); 148 149 qtest_quit(qtest); 150 } 151 152 int main(int argc, char **argv) 153 { 154 const char *arch = qtest_get_arch(); 155 156 g_test_init(&argc, &argv, NULL); 157 158 /* 159 * We need a system that will process unplug requests during system resets 160 * and does not do PCI surprise removal. This holds for x86 ACPI, 161 * s390x and spapr. 162 */ 163 qtest_add_func("/device-plug/pci-unplug-request", 164 test_pci_unplug_request); 165 qtest_add_func("/device-plug/pci-unplug-json-request", 166 test_pci_unplug_json_request); 167 168 if (!strcmp(arch, "s390x")) { 169 qtest_add_func("/device-plug/ccw-unplug", 170 test_ccw_unplug); 171 } 172 173 if (!strcmp(arch, "ppc64")) { 174 qtest_add_func("/device-plug/spapr-cpu-unplug-request", 175 test_spapr_cpu_unplug_request); 176 qtest_add_func("/device-plug/spapr-memory-unplug-request", 177 test_spapr_memory_unplug_request); 178 qtest_add_func("/device-plug/spapr-phb-unplug-request", 179 test_spapr_phb_unplug_request); 180 } 181 182 return g_test_run(); 183 } 184