diff options
author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/hw/virtio/vhost-backend.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/hw/virtio/vhost-backend.c')
-rw-r--r-- | qemu/hw/virtio/vhost-backend.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/qemu/hw/virtio/vhost-backend.c b/qemu/hw/virtio/vhost-backend.c new file mode 100644 index 000000000..4d68a2765 --- /dev/null +++ b/qemu/hw/virtio/vhost-backend.c @@ -0,0 +1,69 @@ +/* + * vhost-backend + * + * Copyright (c) 2013 Virtual Open Systems Sarl. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-backend.h" +#include "qemu/error-report.h" + +#include <sys/ioctl.h> + +static int vhost_kernel_call(struct vhost_dev *dev, unsigned long int request, + void *arg) +{ + int fd = (uintptr_t) dev->opaque; + + assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_KERNEL); + + return ioctl(fd, request, arg); +} + +static int vhost_kernel_init(struct vhost_dev *dev, void *opaque) +{ + assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_KERNEL); + + dev->opaque = opaque; + + return 0; +} + +static int vhost_kernel_cleanup(struct vhost_dev *dev) +{ + int fd = (uintptr_t) dev->opaque; + + assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_KERNEL); + + return close(fd); +} + +static const VhostOps kernel_ops = { + .backend_type = VHOST_BACKEND_TYPE_KERNEL, + .vhost_call = vhost_kernel_call, + .vhost_backend_init = vhost_kernel_init, + .vhost_backend_cleanup = vhost_kernel_cleanup +}; + +int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type) +{ + int r = 0; + + switch (backend_type) { + case VHOST_BACKEND_TYPE_KERNEL: + dev->vhost_ops = &kernel_ops; + break; + case VHOST_BACKEND_TYPE_USER: + dev->vhost_ops = &user_ops; + break; + default: + error_report("Unknown vhost backend type"); + r = -1; + } + + return r; +} |