/* * QEMU device plug/unplug handling * * Copyright (C) 2019 Red Hat Inc. * * Authors: * David Hildenbrand <david@redhat.com> * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "libqos/libqtest.h" #include "qapi/qmp/qdict.h" #include "qapi/qmp/qstring.h" static void device_del(QTestState *qtest, const char *id) { QDict *resp; resp = qtest_qmp(qtest, "{'execute': 'device_del', 'arguments': { 'id': %s } }", id); g_assert(qdict_haskey(resp, "return")); qobject_unref(resp); } static void system_reset(QTestState *qtest) { QDict *resp; resp = qtest_qmp(qtest, "{'execute': 'system_reset'}"); g_assert(qdict_haskey(resp, "return")); qobject_unref(resp); } static void wait_device_deleted_event(QTestState *qtest, const char *id) { QDict *resp, *data; QString *qstr; /* * Other devices might get removed along with the removed device. Skip * these. The device of interest will be the last one. */ for (;;) { resp = qtest_qmp_eventwait_ref(qtest, "DEVICE_DELETED"); data = qdict_get_qdict(resp, "data"); if (!data || !qdict_get(data, "device")) { qobject_unref(resp); continue; } qstr = qobject_to(QString, qdict_get(data, "device")); g_assert(qstr); if (!strcmp(qstring_get_str(qstr), id)) { qobject_unref(resp); break; } qobject_unref(resp); } } static void test_pci_unplug_request(void) { QTestState *qtest = qtest_initf("-device virtio-mouse-pci,id=dev0"); /* * Request device removal. As the guest is not running, the request won't * be processed. However during system reset, the removal will be * handled, removing the device. */ device_del(qtest, "dev0"); system_reset(qtest); wait_device_deleted_event(qtest, "dev0"); qtest_quit(qtest); } static void test_ccw_unplug(void) { QTestState *qtest = qtest_initf("-device virtio-balloon-ccw,id=dev0"); device_del(qtest, "dev0"); wait_device_deleted_event(qtest, "dev0"); qtest_quit(qtest); } static void test_spapr_cpu_unplug_request(void) { QTestState *qtest; qtest = qtest_initf("-cpu power9_v2.0 -smp 1,maxcpus=2 " "-device power9_v2.0-spapr-cpu-core,core-id=1,id=dev0"); /* similar to test_pci_unplug_request */ device_del(qtest, "dev0"); system_reset(qtest); wait_device_deleted_event(qtest, "dev0"); qtest_quit(qtest); } static void test_spapr_memory_unplug_request(void) { QTestState *qtest; qtest = qtest_initf("-m 256M,slots=1,maxmem=768M " "-object memory-backend-ram,id=mem0,size=512M " "-device pc-dimm,id=dev0,memdev=mem0"); /* similar to test_pci_unplug_request */ device_del(qtest, "dev0"); system_reset(qtest); wait_device_deleted_event(qtest, "dev0"); qtest_quit(qtest); } static void test_spapr_phb_unplug_request(void) { QTestState *qtest; qtest = qtest_initf("-device spapr-pci-host-bridge,index=1,id=dev0"); /* similar to test_pci_unplug_request */ device_del(qtest, "dev0"); system_reset(qtest); wait_device_deleted_event(qtest, "dev0"); qtest_quit(qtest); } int main(int argc, char **argv) { const char *arch = qtest_get_arch(); g_test_init(&argc, &argv, NULL); /* * We need a system that will process unplug requests during system resets * and does not do PCI surprise removal. This holds for x86 ACPI, * s390x and spapr. */ qtest_add_func("/device-plug/pci-unplug-request", test_pci_unplug_request); if (!strcmp(arch, "s390x")) { qtest_add_func("/device-plug/ccw-unplug", test_ccw_unplug); } if (!strcmp(arch, "ppc64")) { qtest_add_func("/device-plug/spapr-cpu-unplug-request", test_spapr_cpu_unplug_request); qtest_add_func("/device-plug/spapr-memory-unplug-request", test_spapr_memory_unplug_request); qtest_add_func("/device-plug/spapr-phb-unplug-request", test_spapr_phb_unplug_request); } return g_test_run(); }