*
*/
+#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 "sysemu/balloon.h"
#include "hw/virtio/virtio-balloon.h"
#include "sysemu/kvm.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 (!kvm_enabled() || kvm_has_sync_mmu())
- qemu_madvise(addr, TARGET_PAGE_SIZE,
+ if (!qemu_balloon_is_inhibited() && (!kvm_enabled() ||
+ kvm_has_sync_mmu())) {
+ qemu_madvise(addr, BALLOON_PAGE_SIZE,
deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED);
+ }
#endif
}
[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_NR] = NULL
};
static bool balloon_stats_supported(const VirtIOBalloon *s)
{
VirtIODevice *vdev = VIRTIO_DEVICE(s);
- return virtio_has_feature(vdev, VIRTIO_BALLOON_F_STATS_VQ);
+ return virtio_vdev_has_feature(vdev, VIRTIO_BALLOON_F_STATS_VQ);
}
static bool balloon_stats_enabled(const VirtIOBalloon *s)
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) {
+ break;
+ }
}
error_propagate(errp, err);
err = NULL;
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);
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).
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)
{
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;
}
virtio_cleanup(vdev);
}
+static void virtio_balloon_device_reset(VirtIODevice *vdev)
+{
+ VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
+
+ if (s->stats_vq_elem != NULL) {
+ g_free(s->stats_vq_elem);
+ s->stats_vq_elem = NULL;
+ }
+}
+
static void virtio_balloon_instance_init(Object *obj)
{
VirtIOBalloon *s = VIRTIO_BALLOON(obj);
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;
Code Review / kvmfornfv.git / blobdiff