aboutsummaryrefslogtreecommitdiff
path: root/hw/virtio/vhost.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/virtio/vhost.c')
-rw-r--r--hw/virtio/vhost.c90
1 files changed, 56 insertions, 34 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index f62cfaf38e..c1b1aad6cf 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -13,7 +13,6 @@
* GNU GPL, version 2 or (at your option) any later version.
*/
-#include <sys/ioctl.h>
#include "hw/virtio/vhost.h"
#include "hw/hw.h"
#include "qemu/atomic.h"
@@ -289,15 +288,13 @@ static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size)
log = g_malloc0(size * sizeof *log);
log_base = (uint64_t)(unsigned long)log;
- r = ioctl(dev->control, VHOST_SET_LOG_BASE, &log_base);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base);
assert(r >= 0);
/* Sync only the range covered by the old log */
if (dev->log_size) {
vhost_log_sync_range(dev, 0, dev->log_size * VHOST_LOG_CHUNK - 1);
}
- if (dev->log) {
- g_free(dev->log);
- }
+ g_free(dev->log);
dev->log = log;
dev->log_size = size;
}
@@ -458,7 +455,7 @@ static void vhost_commit(MemoryListener *listener)
}
if (!dev->log_enabled) {
- r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_MEM_TABLE, dev->mem);
assert(r >= 0);
dev->memory_changed = false;
return;
@@ -471,7 +468,7 @@ static void vhost_commit(MemoryListener *listener)
if (dev->log_size < log_size) {
vhost_dev_log_resize(dev, log_size + VHOST_LOG_BUFFER);
}
- r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_MEM_TABLE, dev->mem);
assert(r >= 0);
/* To log less, can only decrease log size after table update. */
if (dev->log_size > log_size + VHOST_LOG_BUFFER) {
@@ -539,7 +536,7 @@ static int vhost_virtqueue_set_addr(struct vhost_dev *dev,
.log_guest_addr = vq->used_phys,
.flags = enable_log ? (1 << VHOST_VRING_F_LOG) : 0,
};
- int r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
+ int r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_ADDR, &addr);
if (r < 0) {
return -errno;
}
@@ -553,7 +550,7 @@ static int vhost_dev_set_features(struct vhost_dev *dev, bool enable_log)
if (enable_log) {
features |= 0x1 << VHOST_F_LOG_ALL;
}
- r = ioctl(dev->control, VHOST_SET_FEATURES, &features);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_FEATURES, &features);
return r < 0 ? -errno : 0;
}
@@ -601,9 +598,7 @@ static int vhost_migration_log(MemoryListener *listener, int enable)
if (r < 0) {
return r;
}
- if (dev->log) {
- g_free(dev->log);
- }
+ g_free(dev->log);
dev->log = NULL;
dev->log_size = 0;
} else {
@@ -668,13 +663,13 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
vq->num = state.num = virtio_queue_get_num(vdev, idx);
- r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_NUM, &state);
if (r) {
return -errno;
}
state.num = virtio_queue_get_last_avail_idx(vdev, idx);
- r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_BASE, &state);
if (r) {
return -errno;
}
@@ -716,7 +711,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
}
file.fd = event_notifier_get_fd(virtio_queue_get_host_notifier(vvq));
- r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_KICK, &file);
if (r) {
r = -errno;
goto fail_kick;
@@ -754,7 +749,7 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
};
int r;
assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
- r = ioctl(dev->control, VHOST_GET_VRING_BASE, &state);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_GET_VRING_BASE, &state);
if (r < 0) {
fprintf(stderr, "vhost VQ %d ring restore failed: %d\n", idx, r);
fflush(stderr);
@@ -796,7 +791,7 @@ static int vhost_virtqueue_init(struct vhost_dev *dev,
}
file.fd = event_notifier_get_fd(&vq->masked_notifier);
- r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file);
+ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_CALL, &file);
if (r) {
r = -errno;
goto fail_call;
@@ -812,25 +807,26 @@ static void vhost_virtqueue_cleanup(struct vhost_virtqueue *vq)
event_notifier_cleanup(&vq->masked_notifier);
}
-int vhost_dev_init(struct vhost_dev *hdev, int devfd, const char *devpath,
- bool force)
+int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
+ VhostBackendType backend_type, bool force)
{
uint64_t features;
int i, r;
- if (devfd >= 0) {
- hdev->control = devfd;
- } else {
- hdev->control = open(devpath, O_RDWR);
- if (hdev->control < 0) {
- return -errno;
- }
+
+ if (vhost_set_backend_type(hdev, backend_type) < 0) {
+ return -1;
}
- r = ioctl(hdev->control, VHOST_SET_OWNER, NULL);
+
+ if (hdev->vhost_ops->vhost_backend_init(hdev, opaque) < 0) {
+ return -errno;
+ }
+
+ r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_OWNER, NULL);
if (r < 0) {
goto fail;
}
- r = ioctl(hdev->control, VHOST_GET_FEATURES, &features);
+ r = hdev->vhost_ops->vhost_call(hdev, VHOST_GET_FEATURES, &features);
if (r < 0) {
goto fail;
}
@@ -875,7 +871,7 @@ fail_vq:
}
fail:
r = -errno;
- close(hdev->control);
+ hdev->vhost_ops->vhost_backend_cleanup(hdev);
return r;
}
@@ -888,7 +884,7 @@ void vhost_dev_cleanup(struct vhost_dev *hdev)
memory_listener_unregister(&hdev->memory_listener);
g_free(hdev->mem);
g_free(hdev->mem_sections);
- close(hdev->control);
+ hdev->vhost_ops->vhost_backend_cleanup(hdev);
}
bool vhost_dev_query(struct vhost_dev *hdev, VirtIODevice *vdev)
@@ -990,10 +986,37 @@ void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
} else {
file.fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vvq));
}
- r = ioctl(hdev->control, VHOST_SET_VRING_CALL, &file);
+ r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_VRING_CALL, &file);
assert(r >= 0);
}
+unsigned vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
+ unsigned features)
+{
+ const int *bit = feature_bits;
+ while (*bit != VHOST_INVALID_FEATURE_BIT) {
+ unsigned bit_mask = (1 << *bit);
+ if (!(hdev->features & bit_mask)) {
+ features &= ~bit_mask;
+ }
+ bit++;
+ }
+ return features;
+}
+
+void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
+ unsigned features)
+{
+ const int *bit = feature_bits;
+ while (*bit != VHOST_INVALID_FEATURE_BIT) {
+ unsigned bit_mask = (1 << *bit);
+ if (features & bit_mask) {
+ hdev->acked_features |= bit_mask;
+ }
+ bit++;
+ }
+}
+
/* Host notifiers must be enabled at this point. */
int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
{
@@ -1005,7 +1028,7 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
if (r < 0) {
goto fail_features;
}
- r = ioctl(hdev->control, VHOST_SET_MEM_TABLE, hdev->mem);
+ r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_MEM_TABLE, hdev->mem);
if (r < 0) {
r = -errno;
goto fail_mem;
@@ -1024,8 +1047,7 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
hdev->log_size = vhost_get_log_size(hdev);
hdev->log = hdev->log_size ?
g_malloc0(hdev->log_size * sizeof *hdev->log) : NULL;
- r = ioctl(hdev->control, VHOST_SET_LOG_BASE,
- (uint64_t)(unsigned long)hdev->log);
+ r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_LOG_BASE, hdev->log);
if (r < 0) {
r = -errno;
goto fail_log;
generated by cgit v1.2.3 (git 2.26.2) at 2025-02-05 12:15:58 +0000