*
*/
+#include "qemu/osdep.h"
#include "qemu/iov.h"
#include "qemu/timer.h"
#include "qemu-common.h"
#include "hw/virtio/virtio.h"
-#include "hw/i386/pc.h"
-#include "cpu.h"
+#include "hw/mem/pc-dimm.h"
#include "sysemu/balloon.h"
#include "hw/virtio/virtio-balloon.h"
#include "sysemu/kvm.h"
#include "exec/address-spaces.h"
+#include "qapi/error.h"
+#include "qapi/qapi-events-misc.h"
#include "qapi/visitor.h"
-#include "qapi-event.h"
#include "trace.h"
-
-#if defined(__linux__)
-#include <sys/mman.h>
-#endif
+#include "qemu/error-report.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-access.h"
+#define BALLOON_PAGE_SIZE (1 << VIRTIO_BALLOON_PFN_SHIFT)
+
static void balloon_page(void *addr, int deflate)
{
-#if defined(__linux__)
if (!qemu_balloon_is_inhibited() && (!kvm_enabled() ||
kvm_has_sync_mmu())) {
- qemu_madvise(addr, TARGET_PAGE_SIZE,
+ qemu_madvise(addr, BALLOON_PAGE_SIZE,
deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED);
}
-#endif
}
static const char *balloon_stat_names[] = {
[VIRTIO_BALLOON_S_MINFLT] = "stat-minor-faults",
[VIRTIO_BALLOON_S_MEMFREE] = "stat-free-memory",
[VIRTIO_BALLOON_S_MEMTOT] = "stat-total-memory",
+ [VIRTIO_BALLOON_S_AVAIL] = "stat-available-memory",
+ [VIRTIO_BALLOON_S_CACHES] = "stat-disk-caches",
+ [VIRTIO_BALLOON_S_HTLB_PGALLOC] = "stat-htlb-pgalloc",
+ [VIRTIO_BALLOON_S_HTLB_PGFAIL] = "stat-htlb-pgfail",
[VIRTIO_BALLOON_S_NR] = NULL
};
VirtIOBalloon *s = opaque;
VirtIODevice *vdev = VIRTIO_DEVICE(s);
- if (!balloon_stats_supported(s)) {
+ if (s->stats_vq_elem == NULL || !balloon_stats_supported(s)) {
/* re-schedule */
balloon_stats_change_timer(s, s->stats_poll_interval);
return;
}
- virtqueue_push(s->svq, &s->stats_vq_elem, s->stats_vq_offset);
+ virtqueue_push(s->svq, s->stats_vq_elem, s->stats_vq_offset);
virtio_notify(vdev, s->svq);
+ g_free(s->stats_vq_elem);
+ s->stats_vq_elem = NULL;
}
-static void balloon_stats_get_all(Object *obj, struct Visitor *v,
- void *opaque, const char *name, Error **errp)
+static void balloon_stats_get_all(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
{
Error *err = NULL;
VirtIOBalloon *s = opaque;
int i;
- visit_start_struct(v, NULL, "guest-stats", name, 0, &err);
+ visit_start_struct(v, name, NULL, 0, &err);
if (err) {
goto out;
}
- visit_type_int(v, &s->stats_last_update, "last-update", &err);
+ visit_type_int(v, "last-update", &s->stats_last_update, &err);
if (err) {
goto out_end;
}
- visit_start_struct(v, NULL, NULL, "stats", 0, &err);
+ visit_start_struct(v, "stats", NULL, 0, &err);
if (err) {
goto out_end;
}
- for (i = 0; !err && i < VIRTIO_BALLOON_S_NR; i++) {
- visit_type_int64(v, (int64_t *) &s->stats[i], balloon_stat_names[i],
- &err);
+ for (i = 0; i < VIRTIO_BALLOON_S_NR; i++) {
+ visit_type_uint64(v, balloon_stat_names[i], &s->stats[i], &err);
+ if (err) {
+ goto out_nested;
+ }
}
- error_propagate(errp, err);
- err = NULL;
- visit_end_struct(v, &err);
+ visit_check_struct(v, &err);
+out_nested:
+ visit_end_struct(v, NULL);
+ if (!err) {
+ visit_check_struct(v, &err);
+ }
out_end:
- error_propagate(errp, err);
- err = NULL;
- visit_end_struct(v, &err);
+ visit_end_struct(v, NULL);
out:
error_propagate(errp, err);
}
-static void balloon_stats_get_poll_interval(Object *obj, struct Visitor *v,
- void *opaque, const char *name,
+static void balloon_stats_get_poll_interval(Object *obj, Visitor *v,
+ const char *name, void *opaque,
Error **errp)
{
VirtIOBalloon *s = opaque;
- visit_type_int(v, &s->stats_poll_interval, name, errp);
+ visit_type_int(v, name, &s->stats_poll_interval, errp);
}
-static void balloon_stats_set_poll_interval(Object *obj, struct Visitor *v,
- void *opaque, const char *name,
+static void balloon_stats_set_poll_interval(Object *obj, Visitor *v,
+ const char *name, void *opaque,
Error **errp)
{
VirtIOBalloon *s = opaque;
Error *local_err = NULL;
int64_t value;
- visit_type_int(v, &value, name, &local_err);
+ visit_type_int(v, name, &value, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
static void virtio_balloon_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
- VirtQueueElement elem;
+ VirtQueueElement *elem;
MemoryRegionSection section;
- while (virtqueue_pop(vq, &elem)) {
+ for (;;) {
size_t offset = 0;
uint32_t pfn;
+ elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
+ if (!elem) {
+ return;
+ }
- while (iov_to_buf(elem.out_sg, elem.out_num, offset, &pfn, 4) == 4) {
+ while (iov_to_buf(elem->out_sg, elem->out_num, offset, &pfn, 4) == 4) {
ram_addr_t pa;
ram_addr_t addr;
int p = virtio_ldl_p(vdev, &pfn);
/* FIXME: remove get_system_memory(), but how? */
section = memory_region_find(get_system_memory(), pa, 1);
- if (!int128_nz(section.size) || !memory_region_is_ram(section.mr))
+ if (!int128_nz(section.size) ||
+ !memory_region_is_ram(section.mr) ||
+ memory_region_is_rom(section.mr) ||
+ memory_region_is_romd(section.mr)) {
+ trace_virtio_balloon_bad_addr(pa);
+ memory_region_unref(section.mr);
continue;
+ }
trace_virtio_balloon_handle_output(memory_region_name(section.mr),
pa);
memory_region_unref(section.mr);
}
- virtqueue_push(vq, &elem, offset);
+ virtqueue_push(vq, elem, offset);
virtio_notify(vdev, vq);
+ g_free(elem);
}
}
static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
- VirtQueueElement *elem = &s->stats_vq_elem;
+ VirtQueueElement *elem;
VirtIOBalloonStat stat;
size_t offset = 0;
qemu_timeval tv;
- if (!virtqueue_pop(vq, elem)) {
+ elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
+ if (!elem) {
goto out;
}
+ if (s->stats_vq_elem != NULL) {
+ /* This should never happen if the driver follows the spec. */
+ virtqueue_push(vq, s->stats_vq_elem, 0);
+ virtio_notify(vdev, vq);
+ g_free(s->stats_vq_elem);
+ }
+
+ s->stats_vq_elem = elem;
+
/* Initialize the stats to get rid of any stale values. This is only
* needed to handle the case where a guest supports fewer stats than it
* used to (ie. it has booted into an old kernel).
s->stats_vq_offset = offset;
if (qemu_gettimeofday(&tv) < 0) {
- fprintf(stderr, "warning: %s: failed to get time of day\n", __func__);
+ warn_report("%s: failed to get time of day", __func__);
goto out;
}
memcpy(config_data, &config, sizeof(struct virtio_balloon_config));
}
+static int build_dimm_list(Object *obj, void *opaque)
+{
+ GSList **list = opaque;
+
+ if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
+ DeviceState *dev = DEVICE(obj);
+ if (dev->realized) { /* only realized DIMMs matter */
+ *list = g_slist_prepend(*list, dev);
+ }
+ }
+
+ object_child_foreach(obj, build_dimm_list, opaque);
+ return 0;
+}
+
+static ram_addr_t get_current_ram_size(void)
+{
+ GSList *list = NULL, *item;
+ ram_addr_t size = ram_size;
+
+ build_dimm_list(qdev_get_machine(), &list);
+ for (item = list; item; item = g_slist_next(item)) {
+ Object *obj = OBJECT(item->data);
+ if (!strcmp(object_get_typename(obj), TYPE_PC_DIMM)) {
+ size += object_property_get_int(obj, PC_DIMM_SIZE_PROP,
+ &error_abort);
+ }
+ }
+ g_slist_free(list);
+
+ return size;
+}
+
static void virtio_balloon_set_config(VirtIODevice *vdev,
const uint8_t *config_data)
{
trace_virtio_balloon_to_target(target, dev->num_pages);
}
-static void virtio_balloon_save(QEMUFile *f, void *opaque)
-{
- virtio_save(VIRTIO_DEVICE(opaque), f);
-}
-
-static void virtio_balloon_save_device(VirtIODevice *vdev, QEMUFile *f)
-{
- VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
-
- qemu_put_be32(f, s->num_pages);
- qemu_put_be32(f, s->actual);
-}
-
-static int virtio_balloon_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_balloon_post_load_device(void *opaque, int version_id)
{
- if (version_id != 1)
- return -EINVAL;
+ VirtIOBalloon *s = VIRTIO_BALLOON(opaque);
- return virtio_load(VIRTIO_DEVICE(opaque), f, version_id);
-}
-
-static int virtio_balloon_load_device(VirtIODevice *vdev, QEMUFile *f,
- int version_id)
-{
- VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
-
- s->num_pages = qemu_get_be32(f);
- s->actual = qemu_get_be32(f);
+ if (balloon_stats_enabled(s)) {
+ balloon_stats_change_timer(s, s->stats_poll_interval);
+ }
return 0;
}
+static const VMStateDescription vmstate_virtio_balloon_device = {
+ .name = "virtio-balloon-device",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .post_load = virtio_balloon_post_load_device,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(num_pages, VirtIOBalloon),
+ VMSTATE_UINT32(actual, VirtIOBalloon),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
s->svq = virtio_add_queue(vdev, 128, virtio_balloon_receive_stats);
reset_stats(s);
-
- register_savevm(dev, "virtio-balloon", -1, 1,
- virtio_balloon_save, virtio_balloon_load, s);
}
static void virtio_balloon_device_unrealize(DeviceState *dev, Error **errp)
balloon_stats_destroy_timer(s);
qemu_remove_balloon_handler(s);
- unregister_savevm(dev, "virtio-balloon", s);
virtio_cleanup(vdev);
}
+static void virtio_balloon_device_reset(VirtIODevice *vdev)
+{
+ VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
+
+ if (s->stats_vq_elem != NULL) {
+ virtqueue_unpop(s->svq, s->stats_vq_elem, 0);
+ g_free(s->stats_vq_elem);
+ s->stats_vq_elem = NULL;
+ }
+}
+
+static void virtio_balloon_set_status(VirtIODevice *vdev, uint8_t status)
+{
+ VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
+
+ if (!s->stats_vq_elem && vdev->vm_running &&
+ (status & VIRTIO_CONFIG_S_DRIVER_OK) && virtqueue_rewind(s->svq, 1)) {
+ /* poll stats queue for the element we have discarded when the VM
+ * was stopped */
+ virtio_balloon_receive_stats(vdev, s->svq);
+ }
+}
+
static void virtio_balloon_instance_init(Object *obj)
{
VirtIOBalloon *s = VIRTIO_BALLOON(obj);
NULL, s, NULL);
}
+static const VMStateDescription vmstate_virtio_balloon = {
+ .name = "virtio-balloon",
+ .minimum_version_id = 1,
+ .version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_VIRTIO_DEVICE,
+ VMSTATE_END_OF_LIST()
+ },
+};
+
static Property virtio_balloon_properties[] = {
DEFINE_PROP_BIT("deflate-on-oom", VirtIOBalloon, host_features,
VIRTIO_BALLOON_F_DEFLATE_ON_OOM, false),
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
dc->props = virtio_balloon_properties;
+ dc->vmsd = &vmstate_virtio_balloon;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
vdc->realize = virtio_balloon_device_realize;
vdc->unrealize = virtio_balloon_device_unrealize;
+ vdc->reset = virtio_balloon_device_reset;
vdc->get_config = virtio_balloon_get_config;
vdc->set_config = virtio_balloon_set_config;
vdc->get_features = virtio_balloon_get_features;
- vdc->save = virtio_balloon_save_device;
- vdc->load = virtio_balloon_load_device;
+ vdc->set_status = virtio_balloon_set_status;
+ vdc->vmsd = &vmstate_virtio_balloon_device;
}
static const TypeInfo virtio_balloon_info = {
projects / qemu.git / blobdiff