Displaying 20 results from an estimated 142 matches for "vring_avail_ev".
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vring_avail_t
2014 Dec 11
0
[PATCH RFC v6 04/20] virtio: add feature checking helpers
...+114,7 @@ void vring_disable_notification(VirtIODevice *vdev, Vring *vring)
*/
bool vring_enable_notification(VirtIODevice *vdev, Vring *vring)
{
- if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
+ if (virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) {
vring_avail_event(&vring->vr) = vring->vr.avail->idx;
} else {
vring->vr.used->flags &= ~VRING_USED_F_NO_NOTIFY;
@@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
* interrupts. */
smp_mb();
- if ((vdev->guest_features & VIR...
2014 Dec 11
0
[PATCH RFC v6 04/20] virtio: add feature checking helpers
...+114,7 @@ void vring_disable_notification(VirtIODevice *vdev, Vring *vring)
*/
bool vring_enable_notification(VirtIODevice *vdev, Vring *vring)
{
- if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
+ if (virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) {
vring_avail_event(&vring->vr) = vring->vr.avail->idx;
} else {
vring->vr.used->flags &= ~VRING_USED_F_NO_NOTIFY;
@@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
* interrupts. */
smp_mb();
- if ((vdev->guest_features & VIR...
2017 Oct 27
1
[PATCH] virtio/ringtest: virtio_ring: fix up need_event math
...fd3fbc 100644
--- a/tools/virtio/ringtest/virtio_ring_0_9.c
+++ b/tools/virtio/ringtest/virtio_ring_0_9.c
@@ -225,16 +225,18 @@ bool enable_call()
void kick_available(void)
{
+ bool need;
+
/* Flush in previous flags write */
/* Barrier C (for pairing) */
smp_mb();
- if (!vring_need_event(vring_avail_event(&ring),
- guest.avail_idx,
- guest.kicked_avail_idx))
- return;
+ need = vring_need_event(vring_avail_event(&ring),
+ guest.avail_idx,
+ guest.kicked_avail_idx);
guest.kicked_avail_idx = guest.avail_idx;
- kick();
+ if (need)
+ kick();
}
/* host side */
@@...
2019 Sep 06
0
[PATCH] virtio: add VIRTIO_RING_NO_LEGACY
....h b/include/uapi/linux/virtio_ring.h
> index 4c4e24c291a5..496db2f33830 100644
> --- a/include/uapi/linux/virtio_ring.h
> +++ b/include/uapi/linux/virtio_ring.h
> @@ -164,6 +164,8 @@ struct vring {
> #define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
> #define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])
>
> +#ifndef VIRTIO_RING_NO_LEGACY
> +
> static inline void vring_init(struct vring *vr, unsigned int num, void *p,
> unsigned long align)
> {
> @@ -181,6 +183,8 @@ static inline unsigned vring_size...
2017 Oct 27
1
[PATCH] virtio/ringtest: virtio_ring: fix up need_event math
...fd3fbc 100644
--- a/tools/virtio/ringtest/virtio_ring_0_9.c
+++ b/tools/virtio/ringtest/virtio_ring_0_9.c
@@ -225,16 +225,18 @@ bool enable_call()
void kick_available(void)
{
+ bool need;
+
/* Flush in previous flags write */
/* Barrier C (for pairing) */
smp_mb();
- if (!vring_need_event(vring_avail_event(&ring),
- guest.avail_idx,
- guest.kicked_avail_idx))
- return;
+ need = vring_need_event(vring_avail_event(&ring),
+ guest.avail_idx,
+ guest.kicked_avail_idx);
guest.kicked_avail_idx = guest.avail_idx;
- kick();
+ if (need)
+ kick();
}
/* host side */
@@...
2011 Nov 03
2
[PATCH 3 of 5] virtio: support unlocked queue kick
...Descriptors and available array need to be set before we expose the
* new available array entries. */
@@ -253,13 +255,30 @@ void virtqueue_kick(struct virtqueue *_v
/* Need to update avail index before checking if we should notify */
virtio_mb();
- if (vq->event ?
- vring_need_event(vring_avail_event(&vq->vring), new, old) :
- !(vq->vring.used->flags & VRING_USED_F_NO_NOTIFY))
- /* Prod other side to tell it about changes. */
- vq->notify(&vq->vq);
+ if (vq->event) {
+ needs_kick = vring_need_event(vring_avail_event(&vq->vring),
+ new, ol...
2011 Nov 03
2
[PATCH 3 of 5] virtio: support unlocked queue kick
...Descriptors and available array need to be set before we expose the
* new available array entries. */
@@ -253,13 +255,30 @@ void virtqueue_kick(struct virtqueue *_v
/* Need to update avail index before checking if we should notify */
virtio_mb();
- if (vq->event ?
- vring_need_event(vring_avail_event(&vq->vring), new, old) :
- !(vq->vring.used->flags & VRING_USED_F_NO_NOTIFY))
- /* Prod other side to tell it about changes. */
- vq->notify(&vq->vq);
+ if (vq->event) {
+ needs_kick = vring_need_event(vring_avail_event(&vq->vring),
+ new, ol...
2020 Apr 06
2
[PATCH] vhost: force spec specified alignment on types
...c;
-
- struct vring_avail *avail;
-
- struct vring_used *used;
-};
-
/* Alignment requirements for vring elements.
* When using pre-virtio 1.0 layout, these fall out naturally.
*/
@@ -164,6 +154,37 @@ struct vring {
#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
#define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])
+/*
+ * The ring element addresses are passed between components with different
+ * alignments assumptions. Thus, we might need to decrease the compiler-selected
+ * alignment, and so must use a typedef to make sure the __aligned a...
2020 Apr 06
2
[PATCH] vhost: force spec specified alignment on types
...c;
-
- struct vring_avail *avail;
-
- struct vring_used *used;
-};
-
/* Alignment requirements for vring elements.
* When using pre-virtio 1.0 layout, these fall out naturally.
*/
@@ -164,6 +154,37 @@ struct vring {
#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
#define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])
+/*
+ * The ring element addresses are passed between components with different
+ * alignments assumptions. Thus, we might need to decrease the compiler-selected
+ * alignment, and so must use a typedef to make sure the __aligned a...
2020 Apr 06
2
[PATCH] vhost: force spec specified alignment on types
...; -
> > /* Alignment requirements for vring elements.
> > * When using pre-virtio 1.0 layout, these fall out naturally.
> > */
> > @@ -164,6 +154,37 @@ struct vring {
> > #define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
> > #define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])
> > +/*
> > + * The ring element addresses are passed between components with different
> > + * alignments assumptions. Thus, we might need to decrease the compiler-selected
> > + * alignment, and so must use...
2020 Apr 06
2
[PATCH] vhost: force spec specified alignment on types
...; -
> > /* Alignment requirements for vring elements.
> > * When using pre-virtio 1.0 layout, these fall out naturally.
> > */
> > @@ -164,6 +154,37 @@ struct vring {
> > #define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
> > #define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])
> > +/*
> > + * The ring element addresses are passed between components with different
> > + * alignments assumptions. Thus, we might need to decrease the compiler-selected
> > + * alignment, and so must use...
2014 Oct 07
1
[PATCH RFC 03/11] virtio: support more feature bits
..._disable_notification(VirtIODevice *vdev, Vring *vring)
*/
bool vring_enable_notification(VirtIODevice *vdev, Vring *vring)
{
- if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
+ if (vdev->guest_features[0] & (1 << VIRTIO_RING_F_EVENT_IDX)) {
vring_avail_event(&vring->vr) = vring->vr.avail->idx;
} else {
vring->vr.used->flags &= ~VRING_USED_F_NO_NOTIFY;
@@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
* interrupts. */
smp_mb();
- if ((vdev->guest_features & VIR...
2014 Oct 07
1
[PATCH RFC 03/11] virtio: support more feature bits
..._disable_notification(VirtIODevice *vdev, Vring *vring)
*/
bool vring_enable_notification(VirtIODevice *vdev, Vring *vring)
{
- if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
+ if (vdev->guest_features[0] & (1 << VIRTIO_RING_F_EVENT_IDX)) {
vring_avail_event(&vring->vr) = vring->vr.avail->idx;
} else {
vring->vr.used->flags &= ~VRING_USED_F_NO_NOTIFY;
@@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
* interrupts. */
smp_mb();
- if ((vdev->guest_features & VIR...
2011 Nov 03
2
[PATCH 5 of 5] virtio: expose added descriptors immediately
...avail->idx = old + vq->num_added;
+ old = vq->vring.avail->idx - vq->num_added;
+ new = vq->vring.avail->idx;
vq->num_added = 0;
- /* Need to update avail index before checking if we should notify */
- virtio_mb();
-
if (vq->event) {
needs_kick = vring_need_event(vring_avail_event(&vq->vring),
new, old);
2011 Nov 03
2
[PATCH 5 of 5] virtio: expose added descriptors immediately
...avail->idx = old + vq->num_added;
+ old = vq->vring.avail->idx - vq->num_added;
+ new = vq->vring.avail->idx;
vq->num_added = 0;
- /* Need to update avail index before checking if we should notify */
- virtio_mb();
-
if (vq->event) {
needs_kick = vring_need_event(vring_avail_event(&vq->vring),
new, old);
2014 Nov 27
1
[PATCH RFC v4 03/16] virtio: support more feature bits
..._disable_notification(VirtIODevice *vdev, Vring *vring)
*/
bool vring_enable_notification(VirtIODevice *vdev, Vring *vring)
{
- if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
+ if (vdev->guest_features[0] & (1 << VIRTIO_RING_F_EVENT_IDX)) {
vring_avail_event(&vring->vr) = vring->vr.avail->idx;
} else {
vring->vr.used->flags &= ~VRING_USED_F_NO_NOTIFY;
@@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
* interrupts. */
smp_mb();
- if ((vdev->guest_features & VIR...
2014 Nov 27
1
[PATCH RFC v4 03/16] virtio: support more feature bits
..._disable_notification(VirtIODevice *vdev, Vring *vring)
*/
bool vring_enable_notification(VirtIODevice *vdev, Vring *vring)
{
- if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
+ if (vdev->guest_features[0] & (1 << VIRTIO_RING_F_EVENT_IDX)) {
vring_avail_event(&vring->vr) = vring->vr.avail->idx;
} else {
vring->vr.used->flags &= ~VRING_USED_F_NO_NOTIFY;
@@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
* interrupts. */
smp_mb();
- if ((vdev->guest_features & VIR...
2011 Sep 07
3
[RFC v2 0/2] virtio: Support releasing lock during kick
This patch allows virtio-blk to release its block queue lock while kicking the
host. This improves scalability on SMP guests who would otherwise spin on the
lock while another vCPU is kicking the host.
This approach can be used for other virtio devices too. It simply splits the
virtqueue_kick() operation into a prepare step which requires that the lock be
held and the actual notify step which
2011 Sep 07
3
[RFC v2 0/2] virtio: Support releasing lock during kick
This patch allows virtio-blk to release its block queue lock while kicking the
host. This improves scalability on SMP guests who would otherwise spin on the
lock while another vCPU is kicking the host.
This approach can be used for other virtio devices too. It simply splits the
virtqueue_kick() operation into a prepare step which requires that the lock be
held and the actual notify step which
2014 Oct 21
2
[PATCH RFC] virtio 1.0 vring endian-ness
...d[num];
- * __u16 avail_event_idx;
+ * __virtio16 avail_event_idx;
* };
*/
/* We publish the used event index at the end of the available ring, and vice
* versa. They are at the end for backwards compatibility. */
#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
-#define vring_avail_event(vr) (*(__u16 *)&(vr)->used->ring[(vr)->num])
+#define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])
static inline void vring_init(struct vring *vr, unsigned int num, void *p,
unsigned long align)
@@ -135,29 +139,29 @@ static inline voi...