Displaying 20 results from an estimated 102 matches for "vhost_addr_us".
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vhost_addr_used
2018 Apr 11
3
[PATCH] vhost: Fix vhost_copy_to_user()
vhost_copy_to_user is used to copy vring used elements to userspace.
We should use VHOST_ADDR_USED instead of VHOST_ADDR_DESC.
Fixes: f88949138058 ("vhost: introduce O(1) vq metadata cache")
Signed-off-by: Eric Auger <eric.auger at redhat.com>
---
This fixes a stall observed when running an aarch64 guest with
virtual smmu
---
drivers/vhost/vhost.c | 2 +-
1 file changed, 1...
2018 Apr 11
3
[PATCH] vhost: Fix vhost_copy_to_user()
vhost_copy_to_user is used to copy vring used elements to userspace.
We should use VHOST_ADDR_USED instead of VHOST_ADDR_DESC.
Fixes: f88949138058 ("vhost: introduce O(1) vq metadata cache")
Signed-off-by: Eric Auger <eric.auger at redhat.com>
---
This fixes a stall observed when running an aarch64 guest with
virtual smmu
---
drivers/vhost/vhost.c | 2 +-
1 file changed, 1...
2019 Aug 07
0
[PATCH V4 7/9] vhost: do not use RCU to synchronize MMU notifier with worker
...by dev->worker so we are serialized with all
* readers.
@@ -1216,18 +1249,18 @@ static inline int vhost_put_avail_event(struct vhost_virtqueue *vq)
struct vring_used *used;
if (!vq->iotlb) {
- rcu_read_lock();
+ vhost_vq_access_map_begin(vq);
- map = rcu_dereference(vq->maps[VHOST_ADDR_USED]);
+ map = vq->maps[VHOST_ADDR_USED];
if (likely(map)) {
used = map->addr;
*((__virtio16 *)&used->ring[vq->num]) =
cpu_to_vhost16(vq, vq->avail_idx);
- rcu_read_unlock();
+ vhost_vq_access_map_end(vq);
return 0;
}
- rcu_read_unlock();
+ vhost_vq_...
2019 Jul 31
0
[PATCH V2 7/9] vhost: do not use RCU to synchronize MMU notifier with worker
...by dev->worker so we are serialized with all
* readers.
@@ -1216,18 +1253,18 @@ static inline int vhost_put_avail_event(struct vhost_virtqueue *vq)
struct vring_used *used;
if (!vq->iotlb) {
- rcu_read_lock();
+ vhost_vq_access_map_begin(vq);
- map = rcu_dereference(vq->maps[VHOST_ADDR_USED]);
+ map = vq->maps[VHOST_ADDR_USED];
if (likely(map)) {
used = map->addr;
*((__virtio16 *)&used->ring[vq->num]) =
cpu_to_vhost16(vq, vq->avail_idx);
- rcu_read_unlock();
+ vhost_vq_access_map_end(vq);
return 0;
}
- rcu_read_unlock();
+ vhost_vq_...
2019 Jul 31
2
[PATCH V2 7/9] vhost: do not use RCU to synchronize MMU notifier with worker
...all
> * readers.
> @@ -1216,18 +1253,18 @@ static inline int vhost_put_avail_event(struct vhost_virtqueue *vq)
> struct vring_used *used;
>
> if (!vq->iotlb) {
> - rcu_read_lock();
> + vhost_vq_access_map_begin(vq);
>
> - map = rcu_dereference(vq->maps[VHOST_ADDR_USED]);
> + map = vq->maps[VHOST_ADDR_USED];
> if (likely(map)) {
> used = map->addr;
> *((__virtio16 *)&used->ring[vq->num]) =
> cpu_to_vhost16(vq, vq->avail_idx);
> - rcu_read_unlock();
> + vhost_vq_access_map_end(vq);
> return 0;
&...
2019 Jul 31
2
[PATCH V2 7/9] vhost: do not use RCU to synchronize MMU notifier with worker
...all
> * readers.
> @@ -1216,18 +1253,18 @@ static inline int vhost_put_avail_event(struct vhost_virtqueue *vq)
> struct vring_used *used;
>
> if (!vq->iotlb) {
> - rcu_read_lock();
> + vhost_vq_access_map_begin(vq);
>
> - map = rcu_dereference(vq->maps[VHOST_ADDR_USED]);
> + map = vq->maps[VHOST_ADDR_USED];
> if (likely(map)) {
> used = map->addr;
> *((__virtio16 *)&used->ring[vq->num]) =
> cpu_to_vhost16(vq, vq->avail_idx);
> - rcu_read_unlock();
> + vhost_vq_access_map_end(vq);
> return 0;
&...
2019 Jul 31
14
[PATCH V2 0/9] Fixes for metadata accelreation
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V1:
- Try not use RCU to syncrhonize MMU notifier with vhost worker
- set dirty pages after no readers
- return -EAGAIN only when we find the range is overlapped with
metadata
Jason Wang (9):
vhost: don't set uaddr for invalid address
vhost: validate MMU notifier
2019 Aug 03
1
[PATCH V2 7/9] vhost: do not use RCU to synchronize MMU notifier with worker
...ne int vhost_put_avail_event(struct vhost_virtqueue *vq)
> >> struct vring_used *used;
> >>
> >> if (!vq->iotlb) {
> >> - rcu_read_lock();
> >> + vhost_vq_access_map_begin(vq);
> >>
> >> - map = rcu_dereference(vq->maps[VHOST_ADDR_USED]);
> >> + map = vq->maps[VHOST_ADDR_USED];
> >> if (likely(map)) {
> >> used = map->addr;
> >> *((__virtio16 *)&used->ring[vq->num]) =
> >> cpu_to_vhost16(vq, vq->avail_idx);
> >> - rcu_read_unlock();
>...
2019 Aug 01
0
[PATCH V2 7/9] vhost: do not use RCU to synchronize MMU notifier with worker
...@@ -1216,18 +1253,18 @@ static inline int vhost_put_avail_event(struct vhost_virtqueue *vq)
>> struct vring_used *used;
>>
>> if (!vq->iotlb) {
>> - rcu_read_lock();
>> + vhost_vq_access_map_begin(vq);
>>
>> - map = rcu_dereference(vq->maps[VHOST_ADDR_USED]);
>> + map = vq->maps[VHOST_ADDR_USED];
>> if (likely(map)) {
>> used = map->addr;
>> *((__virtio16 *)&used->ring[vq->num]) =
>> cpu_to_vhost16(vq, vq->avail_idx);
>> - rcu_read_unlock();
>> + vhost_vq_access_map_e...
2019 Aug 07
12
[PATCH V4 0/9] Fixes for metadata accelreation
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V3:
- remove the unnecessary patch
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost worker
- set dirty pages after no readers
- return -EAGAIN only when we find the
2019 Aug 07
12
[PATCH V4 0/9] Fixes for metadata accelreation
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V3:
- remove the unnecessary patch
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost worker
- set dirty pages after no readers
- return -EAGAIN only when we find the
2019 Aug 07
11
[PATCH V3 00/10] Fixes for metadata accelreation
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost worker
- set dirty pages after no readers
- return -EAGAIN only when we find the range is overlapped with
metadata
Jason Wang (9):
2019 Aug 09
11
[PATCH V5 0/9] Fixes for vhost metadata acceleration
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V4:
- switch to use spinlock synchronize MMU notifier with accessors
Changes from V3:
- remove the unnecessary patch
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost
2019 Aug 09
11
[PATCH V5 0/9] Fixes for vhost metadata acceleration
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V4:
- switch to use spinlock synchronize MMU notifier with accessors
Changes from V3:
- remove the unnecessary patch
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost
2019 Sep 06
1
[PATCH 1/2] Revert "vhost: access vq metadata through kernel virtual address"
...DDR_DESC,
> - (unsigned long)vq->desc,
> - vhost_get_desc_size(vq, vq->num),
> - false);
> - vhost_setup_uaddr(vq, VHOST_ADDR_AVAIL,
> - (unsigned long)vq->avail,
> - vhost_get_avail_size(vq, vq->num),
> - false);
> - vhost_setup_uaddr(vq, VHOST_ADDR_USED,
> - (unsigned long)vq->used,
> - vhost_get_used_size(vq, vq->num),
> - true);
> -}
> -
> -static int vhost_map_prefetch(struct vhost_virtqueue *vq,
> - int index)
> -{
> - struct vhost_map *map;
> - struct vhost_uaddr *uaddr = &vq->...
2019 Sep 05
8
[PATCH 0/2] Revert and rework on the metadata accelreation
Hi:
Per request from Michael and Jason, the metadata accelreation is
reverted in this version and rework in next version.
Please review.
Thanks
Jason Wang (2):
Revert "vhost: access vq metadata through kernel virtual address"
vhost: re-introducing metadata acceleration through kernel virtual
address
drivers/vhost/vhost.c | 202 +++++++++++++++++++++++++-----------------
2019 Sep 05
8
[PATCH 0/2] Revert and rework on the metadata accelreation
Hi:
Per request from Michael and Jason, the metadata accelreation is
reverted in this version and rework in next version.
Please review.
Thanks
Jason Wang (2):
Revert "vhost: access vq metadata through kernel virtual address"
vhost: re-introducing metadata acceleration through kernel virtual
address
drivers/vhost/vhost.c | 202 +++++++++++++++++++++++++-----------------
2019 Sep 08
3
[PATCH 2/2] vhost: re-introducing metadata acceleration through kernel virtual address
...DDR_DESC,
> + (unsigned long)vq->desc,
> + vhost_get_desc_size(vq, vq->num),
> + false);
> + vhost_setup_uaddr(vq, VHOST_ADDR_AVAIL,
> + (unsigned long)vq->avail,
> + vhost_get_avail_size(vq, vq->num),
> + false);
> + vhost_setup_uaddr(vq, VHOST_ADDR_USED,
> + (unsigned long)vq->used,
> + vhost_get_used_size(vq, vq->num),
> + true);
> +}
> +
> +static int vhost_map_prefetch(struct vhost_virtqueue *vq,
> + int index)
> +{
> + struct vhost_map *map;
> + struct vhost_uaddr *uaddr = &vq->...
2019 Sep 08
3
[PATCH 2/2] vhost: re-introducing metadata acceleration through kernel virtual address
...DDR_DESC,
> + (unsigned long)vq->desc,
> + vhost_get_desc_size(vq, vq->num),
> + false);
> + vhost_setup_uaddr(vq, VHOST_ADDR_AVAIL,
> + (unsigned long)vq->avail,
> + vhost_get_avail_size(vq, vq->num),
> + false);
> + vhost_setup_uaddr(vq, VHOST_ADDR_USED,
> + (unsigned long)vq->used,
> + vhost_get_used_size(vq, vq->num),
> + true);
> +}
> +
> +static int vhost_map_prefetch(struct vhost_virtqueue *vq,
> + int index)
> +{
> + struct vhost_map *map;
> + struct vhost_uaddr *uaddr = &vq->...
2019 Sep 05
0
[PATCH 1/2] Revert "vhost: access vq metadata through kernel virtual address"
...*vq)
-{
- vhost_setup_uaddr(vq, VHOST_ADDR_DESC,
- (unsigned long)vq->desc,
- vhost_get_desc_size(vq, vq->num),
- false);
- vhost_setup_uaddr(vq, VHOST_ADDR_AVAIL,
- (unsigned long)vq->avail,
- vhost_get_avail_size(vq, vq->num),
- false);
- vhost_setup_uaddr(vq, VHOST_ADDR_USED,
- (unsigned long)vq->used,
- vhost_get_used_size(vq, vq->num),
- true);
-}
-
-static int vhost_map_prefetch(struct vhost_virtqueue *vq,
- int index)
-{
- struct vhost_map *map;
- struct vhost_uaddr *uaddr = &vq->uaddrs[index];
- struct page **pages;
- int npages...