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 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 process_device_remove(QTestState *qtest, const char *id) 65 { 66 /* 67 * Request device removal. As the guest is not running, the request won't 68 * be processed. However during system reset, the removal will be 69 * handled, removing the device. 70 */ 71 device_del(qtest, id); 72 system_reset(qtest); 73 wait_device_deleted_event(qtest, id); 74 } 75 76 static void test_pci_unplug_request(void) 77 { 78 const char *arch = qtest_get_arch(); 79 const char *machine_addition = ""; 80 81 if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) { 82 machine_addition = "-machine pc"; 83 } 84 85 QTestState *qtest = qtest_initf("%s -device virtio-mouse-pci,id=dev0", 86 machine_addition); 87 88 process_device_remove(qtest, "dev0"); 89 90 qtest_quit(qtest); 91 } 92 93 static void test_pci_unplug_json_request(void) 94 { 95 const char *arch = qtest_get_arch(); 96 const char *machine_addition = ""; 97 98 if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) { 99 machine_addition = "-machine pc"; 100 } 101 102 QTestState *qtest = qtest_initf( 103 "%s -device \"{'driver': 'virtio-mouse-pci', 'id': 'dev0'}\"", 104 machine_addition); 105 106 process_device_remove(qtest, "dev0"); 107 108 qtest_quit(qtest); 109 } 110 111 static void test_ccw_unplug(void) 112 { 113 QTestState *qtest = qtest_initf("-device virtio-balloon-ccw,id=dev0"); 114 115 device_del(qtest, "dev0"); 116 wait_device_deleted_event(qtest, "dev0"); 117 118 qtest_quit(qtest); 119 } 120 121 static void test_spapr_cpu_unplug_request(void) 122 { 123 QTestState *qtest; 124 125 qtest = qtest_initf("-cpu power9_v2.0 -smp 1,maxcpus=2 " 126 "-device power9_v2.0-spapr-cpu-core,core-id=1,id=dev0"); 127 128 /* similar to test_pci_unplug_request */ 129 process_device_remove(qtest, "dev0"); 130 131 qtest_quit(qtest); 132 } 133 134 static void test_spapr_memory_unplug_request(void) 135 { 136 QTestState *qtest; 137 138 qtest = qtest_initf("-m 256M,slots=1,maxmem=768M " 139 "-object memory-backend-ram,id=mem0,size=512M " 140 "-device pc-dimm,id=dev0,memdev=mem0"); 141 142 /* similar to test_pci_unplug_request */ 143 process_device_remove(qtest, "dev0"); 144 145 qtest_quit(qtest); 146 } 147 148 static void test_spapr_phb_unplug_request(void) 149 { 150 QTestState *qtest; 151 152 qtest = qtest_initf("-device spapr-pci-host-bridge,index=1,id=dev0"); 153 154 /* similar to test_pci_unplug_request */ 155 process_device_remove(qtest, "dev0"); 156 157 qtest_quit(qtest); 158 } 159 160 int main(int argc, char **argv) 161 { 162 const char *arch = qtest_get_arch(); 163 164 g_test_init(&argc, &argv, NULL); 165 166 /* 167 * We need a system that will process unplug requests during system resets 168 * and does not do PCI surprise removal. This holds for x86 ACPI, 169 * s390x and spapr. 170 */ 171 qtest_add_func("/device-plug/pci-unplug-request", 172 test_pci_unplug_request); 173 qtest_add_func("/device-plug/pci-unplug-json-request", 174 test_pci_unplug_json_request); 175 176 if (!strcmp(arch, "s390x")) { 177 qtest_add_func("/device-plug/ccw-unplug", 178 test_ccw_unplug); 179 } 180 181 if (!strcmp(arch, "ppc64")) { 182 qtest_add_func("/device-plug/spapr-cpu-unplug-request", 183 test_spapr_cpu_unplug_request); 184 qtest_add_func("/device-plug/spapr-memory-unplug-request", 185 test_spapr_memory_unplug_request); 186 qtest_add_func("/device-plug/spapr-phb-unplug-request", 187 test_spapr_phb_unplug_request); 188 } 189 190 return g_test_run(); 191 } 192