diff options
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | hw/virtio/virtio-balloon.c | 30 | ||||
| -rw-r--r-- | include/hw/virtio/virtio-balloon.h | 4 | ||||
| -rw-r--r-- | tests/functional/meson.build | 2 | ||||
| -rwxr-xr-x | tests/functional/test_virtio_balloon.py | 161 |
5 files changed, 197 insertions, 1 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index a928ce3e41..013a57d5bf 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2246,6 +2246,7 @@ F: include/hw/virtio/virtio-balloon.h F: system/balloon.c F: include/system/balloon.h F: tests/qtest/virtio-balloon-test.c +F: tests/functional/test_virtio_balloon.py virtio-9p M: Greg Kurz <groug@kaod.org> diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c index ad05768ded..2eb5a14fa2 100644 --- a/hw/virtio/virtio-balloon.c +++ b/hw/virtio/virtio-balloon.c @@ -31,7 +31,7 @@ #include "trace.h" #include "qemu/error-report.h" #include "migration/misc.h" - +#include "system/reset.h" #include "hw/virtio/virtio-bus.h" #include "hw/virtio/virtio-access.h" @@ -910,6 +910,8 @@ static void virtio_balloon_device_realize(DeviceState *dev, Error **errp) } reset_stats(s); + s->stats_last_update = 0; + qemu_register_resettable(OBJECT(dev)); } static void virtio_balloon_device_unrealize(DeviceState *dev) @@ -917,6 +919,7 @@ static void virtio_balloon_device_unrealize(DeviceState *dev) VirtIODevice *vdev = VIRTIO_DEVICE(dev); VirtIOBalloon *s = VIRTIO_BALLOON(dev); + qemu_unregister_resettable(OBJECT(dev)); if (s->free_page_bh) { qemu_bh_delete(s->free_page_bh); object_unref(OBJECT(s->iothread)); @@ -987,6 +990,27 @@ static void virtio_balloon_set_status(VirtIODevice *vdev, uint8_t status) } } +static ResettableState *virtio_balloon_get_reset_state(Object *obj) +{ + VirtIOBalloon *s = VIRTIO_BALLOON(obj); + return &s->reset_state; +} + +static void virtio_balloon_reset_enter(Object *obj, ResetType type) +{ + VirtIOBalloon *s = VIRTIO_BALLOON(obj); + + /* + * When waking up from standby/suspend-to-ram, do not reset stats. + */ + if (type == RESET_TYPE_WAKEUP) { + return; + } + + reset_stats(s); + s->stats_last_update = 0; +} + static void virtio_balloon_instance_init(Object *obj) { VirtIOBalloon *s = VIRTIO_BALLOON(obj); @@ -1038,6 +1062,7 @@ static void virtio_balloon_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + ResettableClass *rc = RESETTABLE_CLASS(klass); device_class_set_props(dc, virtio_balloon_properties); dc->vmsd = &vmstate_virtio_balloon; @@ -1050,6 +1075,9 @@ static void virtio_balloon_class_init(ObjectClass *klass, void *data) vdc->get_features = virtio_balloon_get_features; vdc->set_status = virtio_balloon_set_status; vdc->vmsd = &vmstate_virtio_balloon_device; + + rc->get_state = virtio_balloon_get_reset_state; + rc->phases.enter = virtio_balloon_reset_enter; } static const TypeInfo virtio_balloon_info = { diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h index b12c18a43b..0456c211c6 100644 --- a/include/hw/virtio/virtio-balloon.h +++ b/include/hw/virtio/virtio-balloon.h @@ -16,6 +16,7 @@ #define QEMU_VIRTIO_BALLOON_H #include "standard-headers/linux/virtio_balloon.h" +#include "hw/resettable.h" #include "hw/virtio/virtio.h" #include "system/iothread.h" #include "qom/object.h" @@ -71,6 +72,9 @@ struct VirtIOBalloon { bool qemu_4_0_config_size; uint32_t poison_val; + + /* State of the resettable container */ + ResettableState reset_state; }; #endif diff --git a/tests/functional/meson.build b/tests/functional/meson.build index cf80924ddc..2d399cc464 100644 --- a/tests/functional/meson.build +++ b/tests/functional/meson.build @@ -44,6 +44,7 @@ test_timeouts = { 'riscv64_tuxrun' : 120, 's390x_ccw_virtio' : 420, 'sh4_tuxrun' : 240, + 'virtio_balloon': 120, } tests_generic_system = [ @@ -242,6 +243,7 @@ tests_x86_64_system_thorough = [ 'linux_initrd', 'multiprocess', 'netdev_ethtool', + 'virtio_balloon', 'virtio_gpu', 'x86_64_hotplug_cpu', 'x86_64_tuxrun', diff --git a/tests/functional/test_virtio_balloon.py b/tests/functional/test_virtio_balloon.py new file mode 100755 index 0000000000..67b48e1b4e --- /dev/null +++ b/tests/functional/test_virtio_balloon.py @@ -0,0 +1,161 @@ +#!/usr/bin/env python3 +# +# virtio-balloon tests +# +# This work is licensed under the terms of the GNU GPL, version 2 or +# later. See the COPYING file in the top-level directory. + +import time + +from qemu_test import QemuSystemTest, Asset +from qemu_test import wait_for_console_pattern +from qemu_test import exec_command_and_wait_for_pattern + +UNSET_STATS_VALUE = 18446744073709551615 + + +class VirtioBalloonx86(QemuSystemTest): + + ASSET_KERNEL = Asset( + ('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases' + '/31/Server/x86_64/os/images/pxeboot/vmlinuz'), + 'd4738d03dbbe083ca610d0821d0a8f1488bebbdccef54ce33e3adb35fda00129') + + ASSET_INITRD = Asset( + ('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases' + '/31/Server/x86_64/os/images/pxeboot/initrd.img'), + '277cd6c7adf77c7e63d73bbb2cded8ef9e2d3a2f100000e92ff1f8396513cd8b') + + ASSET_DISKIMAGE = Asset( + ('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases' + '/31/Cloud/x86_64/images/Fedora-Cloud-Base-31-1.9.x86_64.qcow2'), + 'e3c1b309d9203604922d6e255c2c5d098a309c2d46215d8fc026954f3c5c27a0') + + DEFAULT_KERNEL_PARAMS = ('root=/dev/vda1 console=ttyS0 net.ifnames=0 ' + 'rd.rescue') + + def wait_for_console_pattern(self, success_message, vm=None): + wait_for_console_pattern( + self, + success_message, + failure_message="Kernel panic - not syncing", + vm=vm, + ) + + def mount_root(self): + self.wait_for_console_pattern('Entering emergency mode.') + prompt = '# ' + self.wait_for_console_pattern(prompt) + + exec_command_and_wait_for_pattern(self, 'mount /dev/vda1 /sysroot', + prompt) + exec_command_and_wait_for_pattern(self, 'chroot /sysroot', + prompt) + exec_command_and_wait_for_pattern(self, "modprobe virtio-balloon", + prompt) + + def assert_initial_stats(self): + ret = self.vm.qmp('qom-get', + {'path': '/machine/peripheral/balloon', + 'property': 'guest-stats'})['return'] + when = ret.get('last-update') + assert when == 0 + stats = ret.get('stats') + for name, val in stats.items(): + assert val == UNSET_STATS_VALUE + + def assert_running_stats(self, then): + ret = self.vm.qmp('qom-get', + {'path': '/machine/peripheral/balloon', + 'property': 'guest-stats'})['return'] + when = ret.get('last-update') + now = time.time() + + assert when > then and when < now + stats = ret.get('stats') + # Stat we expect this particular Kernel to have set + expectData = [ + "stat-available-memory", + "stat-disk-caches", + "stat-free-memory", + "stat-htlb-pgalloc", + "stat-htlb-pgfail", + "stat-major-faults", + "stat-minor-faults", + "stat-swap-in", + "stat-swap-out", + "stat-total-memory", + ] + for name, val in stats.items(): + if name in expectData: + assert val != UNSET_STATS_VALUE + else: + assert val == UNSET_STATS_VALUE + + def test_virtio_balloon_stats(self): + self.set_machine('q35') + kernel_path = self.ASSET_KERNEL.fetch() + initrd_path = self.ASSET_INITRD.fetch() + diskimage_path = self.ASSET_DISKIMAGE.fetch() + + self.vm.set_console() + self.vm.add_args("-S") + self.vm.add_args("-cpu", "max") + self.vm.add_args("-m", "2G") + # Slow down BIOS phase with boot menu, so that after a system + # reset, we can reliably catch the clean stats again in BIOS + # phase before the guest OS launches + self.vm.add_args("-boot", "menu=on") + self.vm.add_args("-machine", "q35,accel=kvm:tcg") + self.vm.add_args("-device", "virtio-balloon,id=balloon") + self.vm.add_args('-drive', + f'file={diskimage_path},if=none,id=drv0,snapshot=on') + self.vm.add_args('-device', 'virtio-blk-pci,bus=pcie.0,' + + 'drive=drv0,id=virtio-disk0,bootindex=1') + + self.vm.add_args( + "-kernel", + kernel_path, + "-initrd", + initrd_path, + "-append", + self.DEFAULT_KERNEL_PARAMS + ) + self.vm.launch() + + # Poll stats at 100ms + self.vm.qmp('qom-set', + {'path': '/machine/peripheral/balloon', + 'property': 'guest-stats-polling-interval', + 'value': 100 }) + + # We've not run any guest code yet, neither BIOS or guest, + # so stats should be all default values + self.assert_initial_stats() + + self.vm.qmp('cont') + + then = time.time() + self.mount_root() + self.assert_running_stats(then) + + # Race window between these two commands, where we + # rely on '-boot menu=on' to (hopefully) ensure we're + # still executing the BIOS when QEMU processes the + # 'stop', and thus have not loaded the virtio-balloon + # driver in the guest + self.vm.qmp('system_reset') + self.vm.qmp('stop') + + # If the above assumption held, we're in BIOS now and + # stats should be all back at their default values + self.assert_initial_stats() + self.vm.qmp('cont') + + then = time.time() + self.mount_root() + self.assert_running_stats(then) + + +if __name__ == '__main__': + QemuSystemTest.main() |