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vhost: add vhost_set_log_base op 

Split VHOST_SET_LOG_BASE call in a seperate function callback, so that
type safety works and more arguments can be added in the next patches.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
This commit is contained in:
Marc-André Lureau 2015-10-09 17:17:23 +02:00 committed by Michael S. Tsirkin
parent 636f4dddfe
commit c2bea314f6
4 changed files with 27 additions and 4 deletions
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6
hw/virtio/vhost-backend.c
View File

@ -67,6 +67,11 @@ static int vhost_kernel_memslots_limit(struct vhost_dev *dev)
return limit;
}
static int vhost_set_log_base(struct vhost_dev *dev, uint64_t base)
{
return vhost_kernel_call(dev, VHOST_SET_LOG_BASE, &base);
}
static const VhostOps kernel_ops = {
.backend_type = VHOST_BACKEND_TYPE_KERNEL,
.vhost_call = vhost_kernel_call,
@ -74,6 +79,7 @@ static const VhostOps kernel_ops = {
.vhost_backend_cleanup = vhost_kernel_cleanup,
.vhost_backend_get_vq_index = vhost_kernel_get_vq_index,
.vhost_backend_memslots_limit = vhost_kernel_memslots_limit,
.vhost_set_log_base = vhost_set_log_base,
};
int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type)

16
hw/virtio/vhost-user.c
View File

@ -242,7 +242,6 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
break;
case VHOST_USER_SET_FEATURES:
case VHOST_USER_SET_LOG_BASE:
case VHOST_USER_SET_PROTOCOL_FEATURES:
msg.u64 = *((__u64 *) arg);
msg.size = sizeof(m.u64);
@ -367,6 +366,20 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
return 0;
}
static int vhost_set_log_base(struct vhost_dev *dev, uint64_t base)
{
VhostUserMsg msg = {
.request = VHOST_USER_SET_LOG_BASE,
.flags = VHOST_USER_VERSION,
.u64 = base,
.size = sizeof(m.u64),
};
vhost_user_write(dev, &msg, NULL, 0);
return 0;
}
static int vhost_user_init(struct vhost_dev *dev, void *opaque)
{
unsigned long long features;
@ -453,4 +466,5 @@ const VhostOps user_ops = {
.vhost_backend_get_vq_index = vhost_user_get_vq_index,
.vhost_backend_set_vring_enable = vhost_user_set_vring_enable,
.vhost_backend_memslots_limit = vhost_user_memslots_limit,
.vhost_set_log_base = vhost_set_log_base,
};

6
hw/virtio/vhost.c
View File

@ -352,7 +352,7 @@ static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size)
/* inform backend of log switching, this must be done before
releasing the current log, to ensure no logging is lost */
r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base);
r = dev->vhost_ops->vhost_set_log_base(dev, log_base);
assert(r >= 0);
vhost_log_put(dev, true);
dev->log = log;
@ -1167,8 +1167,8 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
hdev->log_size = vhost_get_log_size(hdev);
hdev->log = vhost_log_get(hdev->log_size);
log_base = (uintptr_t)hdev->log->log;
r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_LOG_BASE,
hdev->log_size ? &log_base : NULL);
r = hdev->vhost_ops->vhost_set_log_base(hdev,
hdev->log_size ? log_base : 0);
if (r < 0) {
r = -errno;
goto fail_log;

3
include/hw/virtio/vhost-backend.h
View File

@ -28,6 +28,8 @@ typedef int (*vhost_backend_get_vq_index)(struct vhost_dev *dev, int idx);
typedef int (*vhost_backend_set_vring_enable)(struct vhost_dev *dev, int enable);
typedef int (*vhost_backend_memslots_limit)(struct vhost_dev *dev);
typedef int (*vhost_set_log_base_op)(struct vhost_dev *dev, uint64_t base);
typedef struct VhostOps {
VhostBackendType backend_type;
vhost_call vhost_call;
@ -36,6 +38,7 @@ typedef struct VhostOps {
vhost_backend_get_vq_index vhost_backend_get_vq_index;
vhost_backend_set_vring_enable vhost_backend_set_vring_enable;
vhost_backend_memslots_limit vhost_backend_memslots_limit;
vhost_set_log_base_op vhost_set_log_base;
} VhostOps;
extern const VhostOps user_ops;