linux-toradex.git/drivers/vhost/vhost.h, branch v5.16

vhost: fix up vhost_work coding style

2021-07-03T08:50:55+00:00

Switch from a mix of tabs and spaces to just tabs.

Signed-off-by: Mike Christie 
Link: https://lore.kernel.org/r/20210525174733.6212-6-michael.christie@oracle.com
Reviewed-by: Stefano Garzarella 
Signed-off-by: Michael S. Tsirkin

vhost: fix poll coding style

2021-07-03T08:50:55+00:00

We use 3 coding styles in this struct. Switch to just tabs.

Signed-off-by: Mike Christie 
Reviewed-by: Chaitanya Kulkarni 
Reviewed-by: Stefan Hajnoczi 
Acked-by: Jason Wang 
Link: https://lore.kernel.org/r/20210525174733.6212-5-michael.christie@oracle.com
Signed-off-by: Michael S. Tsirkin

vhost: remove work arg from vhost_work_flush

2021-07-03T08:50:54+00:00

vhost_work_flush doesn't do anything with the work arg. This patch drops
it and then renames vhost_work_flush to vhost_work_dev_flush to reflect
that the function flushes all the works in the dev and not just a
specific queue or work item.

Signed-off-by: Mike Christie 
Acked-by: Jason Wang 
Reviewed-by: Chaitanya Kulkarni 
Link: https://lore.kernel.org/r/20210525174733.6212-2-michael.christie@oracle.com
Reviewed-by: Stefano Garzarella 
Signed-off-by: Michael S. Tsirkin

vhost: Remove the repeated declaration

2021-07-03T08:50:53+00:00

Function 'vhost_vring_ioctl' is declared twice, remove the repeated
declaration.

Cc: "Michael S. Tsirkin" 
Cc: Jason Wang 
Signed-off-by: Shaokun Zhang 
Link: https://lore.kernel.org/r/1621857884-19964-1-git-send-email-zhangshaokun@hisilicon.com
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin

vhost: add helper to check if a vq has been setup

2020-11-15T22:30:54+00:00

This adds a helper check if a vq has been setup. The next patches
will use this when we move the vhost scsi cmd preallocation from per
session to per vq. In the per vq case, we only want to allocate cmds
for vqs that have actually been setup and not for all the possible
vqs.

Signed-off-by: Mike Christie 
Link: https://lore.kernel.org/r/1604986403-4931-2-git-send-email-michael.christie@oracle.com
Signed-off-by: Michael S. Tsirkin 
Acked-by: Jason Wang 
Acked-by: Stefan Hajnoczi

vhost_vdpa: remove unnecessary spin_lock in vhost_vring_call

2020-10-21T14:48:10+00:00

This commit removed unnecessary spin_locks in vhost_vring_call
and related operations. Because we manipulate irq offloading
contents in vhost_vdpa ioctl code path which is already
protected by dev mutex and vq mutex.

Signed-off-by: Zhu Lingshan 
Link: https://lore.kernel.org/r/20200909065234.3313-1-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin 
Acked-by: Jason Wang

vhost: reduce stack usage in log_used

2020-10-21T14:34:10+00:00

Fix the warning: [-Werror=-Wframe-larger-than=]

drivers/vhost/vhost.c: In function log_used:
drivers/vhost/vhost.c:1906:1:
warning: the frame size of 1040 bytes is larger than 1024 bytes

Signed-off-by: Li Wang 
Link: https://lore.kernel.org/r/1600106889-25013-1-git-send-email-li.wang@windriver.com
Signed-off-by: Michael S. Tsirkin 
Acked-by: Jason Wang

vhost: generialize backend features setting/getting

2020-08-05T22:39:18+00:00

Move the backend features setting/getting from net.c to vhost.c to be
reused by vhost-vdpa.

Signed-off-by: Jason Wang 
Link: https://lore.kernel.org/r/20200804162048.22587-3-eli@mellanox.com
Signed-off-by: Michael S. Tsirkin

vhost: introduce vhost_vring_call

2020-08-05T15:08:42+00:00

This commit introduces struct vhost_vring_call which replaced
raw struct eventfd_ctx *call_ctx in struct vhost_virtqueue.
Besides eventfd_ctx, it contains a spin lock and an
irq_bypass_producer in its structure.

Signed-off-by: Zhu Lingshan 
Suggested-by: Jason Wang 
Link: https://lore.kernel.org/r/20200731065533.4144-2-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin

vhost: allow device that does not depend on vhost worker

2020-06-04T19:36:51+00:00

vDPA device currently relays the eventfd via vhost worker. This is
inefficient due the latency of wakeup and scheduling, so this patch
tries to introduce a use_worker attribute for the vhost device. When
use_worker is not set with vhost_dev_init(), vhost won't try to
allocate a worker thread and the vhost_poll will be processed directly
in the wakeup function.

This help for vDPA since it reduces the latency caused by vhost worker.

In my testing, it saves 0.2 ms in pings between VMs on a mutual host.

Signed-off-by: Zhu Lingshan 
Signed-off-by: Jason Wang 
Link: https://lore.kernel.org/r/20200529080303.15449-2-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin