Displaying 20 results from an estimated 27 matches for "vhost_desc_flags".
2019 Oct 12
2
[PATCH RFC v1 2/2] vhost: batching fetches
...h_descs = dev->iov_limit - UIO_MAXIOV;
> vq->descs = kmalloc_array(vq->max_descs,
> sizeof(*vq->descs),
> GFP_KERNEL);
> @@ -2366,6 +2368,8 @@ static void pop_split_desc(struct vhost_virtqueue *vq)
> --vq->ndescs;
> }
>
> +#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
> + VRING_DESC_F_NEXT)
> static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
> {
> struct vhost_desc *h;
> @@ -2375,7 +2379,7 @@ static int push_split_desc(struct vhost_virtqueue *vq, struc...
2019 Oct 12
2
[PATCH RFC v1 2/2] vhost: batching fetches
...h_descs = dev->iov_limit - UIO_MAXIOV;
> vq->descs = kmalloc_array(vq->max_descs,
> sizeof(*vq->descs),
> GFP_KERNEL);
> @@ -2366,6 +2368,8 @@ static void pop_split_desc(struct vhost_virtqueue *vq)
> --vq->ndescs;
> }
>
> +#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
> + VRING_DESC_F_NEXT)
> static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
> {
> struct vhost_desc *h;
> @@ -2375,7 +2379,7 @@ static int push_split_desc(struct vhost_virtqueue *vq, struc...
2020 Feb 06
0
vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot
...--git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
> index 27ae5b4872a0..56c5253056ee 100644
> --- a/drivers/vhost/vhost.c
> +++ b/drivers/vhost/vhost.c
> @@ -2125,6 +2125,8 @@ static void pop_split_desc(struct vhost_virtqueue *vq)
> --vq->ndescs;
> }
>
> +#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
> + VRING_DESC_F_NEXT)
> static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
> {
> struct vhost_desc *h;
> @@ -2134,7 +2136,7 @@ static int push_split_desc(struct vhost_virtqueue *vq, struct v...
2019 Oct 11
0
[PATCH RFC v1 2/2] vhost: batching fetches
...;max_descs = dev->iov_limit;
+ vq->batch_descs = dev->iov_limit - UIO_MAXIOV;
vq->descs = kmalloc_array(vq->max_descs,
sizeof(*vq->descs),
GFP_KERNEL);
@@ -2366,6 +2368,8 @@ static void pop_split_desc(struct vhost_virtqueue *vq)
--vq->ndescs;
}
+#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
+ VRING_DESC_F_NEXT)
static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
{
struct vhost_desc *h;
@@ -2375,7 +2379,7 @@ static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc,
h = &a...
2019 Oct 12
0
[PATCH RFC v1 2/2] vhost: batching fetches
...- UIO_MAXIOV;
> > vq->descs = kmalloc_array(vq->max_descs,
> > sizeof(*vq->descs),
> > GFP_KERNEL);
> > @@ -2366,6 +2368,8 @@ static void pop_split_desc(struct vhost_virtqueue *vq)
> > --vq->ndescs;
> > }
> > +#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
> > + VRING_DESC_F_NEXT)
> > static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
> > {
> > struct vhost_desc *h;
> > @@ -2375,7 +2379,7 @@ static int push_split_desc(struct v...
2020 Jun 03
2
[PATCH RFC 01/13] vhost: option to fetch descriptors through an independent struct
...k_split_desc(struct vhost_virtqueue *vq)
> +{
> + BUG_ON(!vq->ndescs);
> + return &vq->descs[vq->ndescs - 1];
> +}
> +
> +static void pop_split_desc(struct vhost_virtqueue *vq)
> +{
> + BUG_ON(!vq->ndescs);
> + --vq->ndescs;
> +}
> +
> +#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
> + VRING_DESC_F_NEXT)
> +static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
> +{
> + struct vhost_desc *h;
> +
> + if (unlikely(vq->ndescs >= vq->max_descs))
> + return -EINVAL;...
2020 Jun 03
2
[PATCH RFC 01/13] vhost: option to fetch descriptors through an independent struct
...k_split_desc(struct vhost_virtqueue *vq)
> +{
> + BUG_ON(!vq->ndescs);
> + return &vq->descs[vq->ndescs - 1];
> +}
> +
> +static void pop_split_desc(struct vhost_virtqueue *vq)
> +{
> + BUG_ON(!vq->ndescs);
> + --vq->ndescs;
> +}
> +
> +#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
> + VRING_DESC_F_NEXT)
> +static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
> +{
> + struct vhost_desc *h;
> +
> + if (unlikely(vq->ndescs >= vq->max_descs))
> + return -EINVAL;...
2020 Jun 02
0
[PATCH RFC 01/13] vhost: option to fetch descriptors through an independent struct
...BOL_GPL(vhost_get_vq_desc);
+static struct vhost_desc *peek_split_desc(struct vhost_virtqueue *vq)
+{
+ BUG_ON(!vq->ndescs);
+ return &vq->descs[vq->ndescs - 1];
+}
+
+static void pop_split_desc(struct vhost_virtqueue *vq)
+{
+ BUG_ON(!vq->ndescs);
+ --vq->ndescs;
+}
+
+#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
+ VRING_DESC_F_NEXT)
+static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
+{
+ struct vhost_desc *h;
+
+ if (unlikely(vq->ndescs >= vq->max_descs))
+ return -EINVAL;
+ h = &vq->descs[vq->ndes...
2020 Apr 07
0
[PATCH v7 17/19] vhost: option to fetch descriptors through an independent struct
...BOL_GPL(vhost_get_vq_desc);
+static struct vhost_desc *peek_split_desc(struct vhost_virtqueue *vq)
+{
+ BUG_ON(!vq->ndescs);
+ return &vq->descs[vq->ndescs - 1];
+}
+
+static void pop_split_desc(struct vhost_virtqueue *vq)
+{
+ BUG_ON(!vq->ndescs);
+ --vq->ndescs;
+}
+
+#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
+ VRING_DESC_F_NEXT)
+static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
+{
+ struct vhost_desc *h;
+
+ if (unlikely(vq->ndescs >= vq->max_descs))
+ return -EINVAL;
+ h = &vq->descs[vq->ndes...
2020 Apr 07
0
[PATCH v8 17/19] vhost: option to fetch descriptors through an independent struct
...BOL_GPL(vhost_get_vq_desc);
+static struct vhost_desc *peek_split_desc(struct vhost_virtqueue *vq)
+{
+ BUG_ON(!vq->ndescs);
+ return &vq->descs[vq->ndescs - 1];
+}
+
+static void pop_split_desc(struct vhost_virtqueue *vq)
+{
+ BUG_ON(!vq->ndescs);
+ --vq->ndescs;
+}
+
+#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
+ VRING_DESC_F_NEXT)
+static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
+{
+ struct vhost_desc *h;
+
+ if (unlikely(vq->ndescs >= vq->max_descs))
+ return -EINVAL;
+ h = &vq->descs[vq->ndes...
2020 Jun 03
0
[PATCH RFC 01/13] vhost: option to fetch descriptors through an independent struct
...gt; + BUG_ON(!vq->ndescs);
> > + return &vq->descs[vq->ndescs - 1];
> > +}
> > +
> > +static void pop_split_desc(struct vhost_virtqueue *vq)
> > +{
> > + BUG_ON(!vq->ndescs);
> > + --vq->ndescs;
> > +}
> > +
> > +#define VHOST_DESC_FLAGS (VRING_DESC_F_INDIRECT | VRING_DESC_F_WRITE | \
> > + VRING_DESC_F_NEXT)
> > +static int push_split_desc(struct vhost_virtqueue *vq, struct vring_desc *desc, u16 id)
> > +{
> > + struct vhost_desc *h;
> > +
> > + if (unlikely(vq->ndescs >= vq->max_de...
2019 Oct 11
8
[PATCH RFC v1 0/2] vhost: ring format independence
So the idea is as follows: we convert descriptors to an
independent format first, and process that converting to
iov later.
The point is that we have a tight loop that fetches
descriptors, which is good for cache utilization.
This will also allow all kind of batching tricks -
e.g. it seems possible to keep SMAP disabled while
we are fetching multiple descriptors.
And perhaps more importantly,
2019 Oct 11
8
[PATCH RFC v1 0/2] vhost: ring format independence
So the idea is as follows: we convert descriptors to an
independent format first, and process that converting to
iov later.
The point is that we have a tight loop that fetches
descriptors, which is good for cache utilization.
This will also allow all kind of batching tricks -
e.g. it seems possible to keep SMAP disabled while
we are fetching multiple descriptors.
And perhaps more importantly,
2020 Jan 07
6
vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot
On 07.01.20 10:39, Michael S. Tsirkin wrote:
> On Tue, Jan 07, 2020 at 09:59:16AM +0100, Christian Borntraeger wrote:
>>
>>
>> On 06.01.20 11:50, Michael S. Tsirkin wrote:
>>> On Wed, Dec 18, 2019 at 04:59:02PM +0100, Christian Borntraeger wrote:
>>>> On 18.12.19 16:10, Michael S. Tsirkin wrote:
>>>>> On Wed, Dec 18, 2019 at 03:43:43PM
2020 Jan 07
6
vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot
On 07.01.20 10:39, Michael S. Tsirkin wrote:
> On Tue, Jan 07, 2020 at 09:59:16AM +0100, Christian Borntraeger wrote:
>>
>>
>> On 06.01.20 11:50, Michael S. Tsirkin wrote:
>>> On Wed, Dec 18, 2019 at 04:59:02PM +0100, Christian Borntraeger wrote:
>>>> On 18.12.19 16:10, Michael S. Tsirkin wrote:
>>>>> On Wed, Dec 18, 2019 at 03:43:43PM
2019 Oct 12
2
[PATCH RFC v2 0/2] vhost: ring format independence
This adds infrastructure required for supporting
multiple ring formats.
The idea is as follows: we convert descriptors to an
independent format first, and process that converting to
iov later.
The point is that we have a tight loop that fetches
descriptors, which is good for cache utilization.
This will also allow all kind of batching tricks -
e.g. it seems possible to keep SMAP disabled while
2019 Oct 13
4
[PATCH RFC v3 0/4] vhost: ring format independence
This adds infrastructure required for supporting
multiple ring formats.
The idea is as follows: we convert descriptors to an
independent format first, and process that converting to
iov later.
The point is that we have a tight loop that fetches
descriptors, which is good for cache utilization.
This will also allow all kind of batching tricks -
e.g. it seems possible to keep SMAP disabled while
2019 Oct 13
6
[PATCH RFC v4 0/5] vhost: ring format independence
This adds infrastructure required for supporting
multiple ring formats.
The idea is as follows: we convert descriptors to an
independent format first, and process that converting to
iov later.
The point is that we have a tight loop that fetches
descriptors, which is good for cache utilization.
This will also allow all kind of batching tricks -
e.g. it seems possible to keep SMAP disabled while
2019 Oct 11
0
[vhost:vhost 6/6] drivers/vhost/vhost.c:2672:9: error: 'desc' undeclared; did you mean 'rdtsc'?
...= 0;
2612 if (unlikely(log))
2613 *log_num = 0;
2614
2615 for (i = vq->first_desc; i < vq->ndescs; ++i) {
2616 unsigned iov_count = *in_num + *out_num;
2617 struct vhost_desc *desc = &vq->descs[i];
2618 int access;
2619
2620 if (desc->flags & ~VHOST_DESC_FLAGS) {
2621 vq_err(vq, "Unexpected flags: 0x%x at descriptor id 0x%x\n",
2622 desc->flags, desc->id);
2623 ret = -EINVAL;
2624 goto err;
2625 }
2626 if (desc->flags & VRING_DESC_F_WRITE)
2627 access = VHOST_ACCESS_WO;
2628 else
2629...
2019 Oct 11
0
[vhost:vhost 6/6] drivers/vhost/vhost.c:2672:9: error: 'desc' undeclared
...= 0;
2612 if (unlikely(log))
2613 *log_num = 0;
2614
2615 for (i = vq->first_desc; i < vq->ndescs; ++i) {
2616 unsigned iov_count = *in_num + *out_num;
2617 struct vhost_desc *desc = &vq->descs[i];
2618 int access;
2619
2620 if (desc->flags & ~VHOST_DESC_FLAGS) {
2621 vq_err(vq, "Unexpected flags: 0x%x at descriptor id 0x%x\n",
2622 desc->flags, desc->id);
2623 ret = -EINVAL;
2624 goto err;
2625 }
2626 if (desc->flags & VRING_DESC_F_WRITE)
2627 access = VHOST_ACCESS_WO;
2628 else
2629...