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/*
* 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 "libqtest.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qstring.h"
static void device_del_start(QTestState *qtest, const char *id)
{
qtest_qmp_send(qtest,
"{'execute': 'device_del', 'arguments': { 'id': %s } }", id);
}
static void device_del_finish(QTestState *qtest)
{
QDict *resp = qtest_qmp_receive(qtest);
g_assert(qdict_haskey(resp, "return"));
qobject_unref(resp);
}
static void device_del_request(QTestState *qtest, const char *id)
{
device_del_start(qtest, id);
device_del_finish(qtest);
}
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_request(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");
/*
* The DEVICE_DELETED events will be sent before the command
* completes.
*/
device_del_start(qtest, "dev0");
wait_device_deleted_event(qtest, "dev0");
device_del_finish(qtest);
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_request(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_request(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_request(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();
}
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