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 } 222