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_ccw_unplug(void) 81 { 82 QTestState *qtest = qtest_initf("-device virtio-balloon-ccw,id=dev0"); 83 84 device_del(qtest, "dev0"); 85 wait_device_deleted_event(qtest, "dev0"); 86 87 qtest_quit(qtest); 88 } 89 90 static void test_spapr_cpu_unplug_request(void) 91 { 92 QTestState *qtest; 93 94 qtest = qtest_initf("-cpu power9_v2.0 -smp 1,maxcpus=2 " 95 "-device power9_v2.0-spapr-cpu-core,core-id=1,id=dev0"); 96 97 /* similar to test_pci_unplug_request */ 98 device_del(qtest, "dev0"); 99 system_reset(qtest); 100 wait_device_deleted_event(qtest, "dev0"); 101 102 qtest_quit(qtest); 103 } 104 105 static void test_spapr_memory_unplug_request(void) 106 { 107 QTestState *qtest; 108 109 qtest = qtest_initf("-m 256M,slots=1,maxmem=768M " 110 "-object memory-backend-ram,id=mem0,size=512M " 111 "-device pc-dimm,id=dev0,memdev=mem0"); 112 113 /* similar to test_pci_unplug_request */ 114 device_del(qtest, "dev0"); 115 system_reset(qtest); 116 wait_device_deleted_event(qtest, "dev0"); 117 118 qtest_quit(qtest); 119 } 120 121 static void test_spapr_phb_unplug_request(void) 122 { 123 QTestState *qtest; 124 125 qtest = qtest_initf("-device spapr-pci-host-bridge,index=1,id=dev0"); 126 127 /* similar to test_pci_unplug_request */ 128 device_del(qtest, "dev0"); 129 system_reset(qtest); 130 wait_device_deleted_event(qtest, "dev0"); 131 132 qtest_quit(qtest); 133 } 134 135 int main(int argc, char **argv) 136 { 137 const char *arch = qtest_get_arch(); 138 139 g_test_init(&argc, &argv, NULL); 140 141 /* 142 * We need a system that will process unplug requests during system resets 143 * and does not do PCI surprise removal. This holds for x86 ACPI, 144 * s390x and spapr. 145 */ 146 qtest_add_func("/device-plug/pci-unplug-request", 147 test_pci_unplug_request); 148 149 if (!strcmp(arch, "s390x")) { 150 qtest_add_func("/device-plug/ccw-unplug", 151 test_ccw_unplug); 152 } 153 154 if (!strcmp(arch, "ppc64")) { 155 qtest_add_func("/device-plug/spapr-cpu-unplug-request", 156 test_spapr_cpu_unplug_request); 157 qtest_add_func("/device-plug/spapr-memory-unplug-request", 158 test_spapr_memory_unplug_request); 159 qtest_add_func("/device-plug/spapr-phb-unplug-request", 160 test_spapr_phb_unplug_request); 161 } 162 163 return g_test_run(); 164 } 165