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_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 } 179