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tests/device-plug: Add a simple PCI unplug request test 

The issue with testing asynchronous unplug requests it that they usually
require a running guest to handle the request. However, to test if
unplug of PCI devices works, we can apply a nice little trick on some
architectures:

On system reset, x86 ACPI, s390x and spapr will perform the unplug,
resulting in the device of interest to get deleted and a DEVICE_DELETED
event getting sent.

On s390x, we still get a warning
    qemu-system-s390x: -device virtio-mouse-pci,id=dev0:
    warning: Plugging a PCI/zPCI device without the 'zpci' CPU feature
    enabled; the guest will not be able to see/use this device

This will be fixed soon, when we enable the zpci CPU feature always
(Conny already has a patch for this queued).

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190218092202.26683-4-david@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Hildenbrand 2019-02-18 10:21:59 +01:00 committed by David Gibson
parent b8165118f5
commit 0d9d4872e5
2 changed files with 97 additions and 0 deletions
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4
tests/Makefile.include
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@ -192,6 +192,7 @@ check-qtest-i386-$(CONFIG_ISA_IPMI_KCS) += tests/ipmi-kcs-test$(EXESUF)
# check-qtest-i386-$(CONFIG_ISA_IPMI_BT) += tests/ipmi-bt-test$(EXESUF)
check-qtest-i386-y += tests/i440fx-test$(EXESUF)
check-qtest-i386-y += tests/fw_cfg-test$(EXESUF)
check-qtest-i386-y += tests/device-plug-test$(EXESUF)
check-qtest-i386-y += tests/drive_del-test$(EXESUF)
check-qtest-i386-$(CONFIG_WDT_IB700) += tests/wdt_ib700-test$(EXESUF)
check-qtest-i386-y += tests/tco-test$(EXESUF)
@ -256,6 +257,7 @@ check-qtest-ppc-$(CONFIG_M48T59) += tests/m48t59-test$(EXESUF)
check-qtest-ppc64-y += $(check-qtest-ppc-y)
check-qtest-ppc64-$(CONFIG_PSERIES) += tests/spapr-phb-test$(EXESUF)
check-qtest-ppc64-$(CONFIG_PSERIES) += tests/device-plug-test$(EXESUF)
check-qtest-ppc64-$(CONFIG_POWERNV) += tests/pnv-xscom-test$(EXESUF)
check-qtest-ppc64-y += tests/migration-test$(EXESUF)
check-qtest-ppc64-$(CONFIG_PSERIES) += tests/rtas-test$(EXESUF)
@ -310,6 +312,7 @@ check-qtest-s390x-$(CONFIG_SLIRP) += tests/test-netfilter$(EXESUF)
check-qtest-s390x-$(CONFIG_POSIX) += tests/test-filter-mirror$(EXESUF)
check-qtest-s390x-$(CONFIG_POSIX) += tests/test-filter-redirector$(EXESUF)
check-qtest-s390x-y += tests/drive_del-test$(EXESUF)
check-qtest-s390x-y += tests/device-plug-test$(EXESUF)
check-qtest-s390x-y += tests/virtio-ccw-test$(EXESUF)
check-qtest-s390x-y += tests/cpu-plug-test$(EXESUF)
check-qtest-s390x-y += tests/migration-test$(EXESUF)
@ -750,6 +753,7 @@ tests/ipoctal232-test$(EXESUF): tests/ipoctal232-test.o
tests/qom-test$(EXESUF): tests/qom-test.o
tests/test-hmp$(EXESUF): tests/test-hmp.o
tests/machine-none-test$(EXESUF): tests/machine-none-test.o
tests/device-plug-test$(EXESUF): tests/device-plug-test.o
tests/drive_del-test$(EXESUF): tests/drive_del-test.o $(libqos-virtio-obj-y)
tests/nvme-test$(EXESUF): tests/nvme-test.o $(libqos-pc-obj-y)
tests/pvpanic-test$(EXESUF): tests/pvpanic-test.o

93
tests/device-plug-test.c Normal file
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@ -0,0 +1,93 @@
/*
* 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_request(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_request(qtest, "dev0");
system_reset(qtest);
wait_device_deleted_event(qtest, "dev0");
qtest_quit(qtest);
}
int main(int argc, char **argv)
{
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);
return g_test_run();
}