diff options
Diffstat (limited to 'qemu/hw/virtio/vhost-backend.c')
| -rw-r--r-- | qemu/hw/virtio/vhost-backend.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/qemu/hw/virtio/vhost-backend.c b/qemu/hw/virtio/vhost-backend.c deleted file mode 100644 index b35890289..000000000 --- a/qemu/hw/virtio/vhost-backend.c +++ /dev/null @@ -1,212 +0,0 @@ -/* - * 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 "qemu/osdep.h" -#include "hw/virtio/vhost.h" -#include "hw/virtio/vhost-backend.h" -#include "qemu/error-report.h" -#include "linux/vhost.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 int vhost_kernel_memslots_limit(struct vhost_dev *dev) -{ - int limit = 64; - char *s; - - if (g_file_get_contents("/sys/module/vhost/parameters/max_mem_regions", - &s, NULL, NULL)) { - uint64_t val = g_ascii_strtoull(s, NULL, 10); - if (!((val == G_MAXUINT64 || !val) && errno)) { - return val; - } - error_report("ignoring invalid max_mem_regions value in vhost module:" - " %s", s); - } - return limit; -} - -static int vhost_kernel_net_set_backend(struct vhost_dev *dev, - struct vhost_vring_file *file) -{ - return vhost_kernel_call(dev, VHOST_NET_SET_BACKEND, file); -} - -static int vhost_kernel_scsi_set_endpoint(struct vhost_dev *dev, - struct vhost_scsi_target *target) -{ - return vhost_kernel_call(dev, VHOST_SCSI_SET_ENDPOINT, target); -} - -static int vhost_kernel_scsi_clear_endpoint(struct vhost_dev *dev, - struct vhost_scsi_target *target) -{ - return vhost_kernel_call(dev, VHOST_SCSI_CLEAR_ENDPOINT, target); -} - -static int vhost_kernel_scsi_get_abi_version(struct vhost_dev *dev, int *version) -{ - return vhost_kernel_call(dev, VHOST_SCSI_GET_ABI_VERSION, version); -} - -static int vhost_kernel_set_log_base(struct vhost_dev *dev, uint64_t base, - struct vhost_log *log) -{ - return vhost_kernel_call(dev, VHOST_SET_LOG_BASE, &base); -} - -static int vhost_kernel_set_mem_table(struct vhost_dev *dev, - struct vhost_memory *mem) -{ - return vhost_kernel_call(dev, VHOST_SET_MEM_TABLE, mem); -} - -static int vhost_kernel_set_vring_addr(struct vhost_dev *dev, - struct vhost_vring_addr *addr) -{ - return vhost_kernel_call(dev, VHOST_SET_VRING_ADDR, addr); -} - -static int vhost_kernel_set_vring_endian(struct vhost_dev *dev, - struct vhost_vring_state *ring) -{ - return vhost_kernel_call(dev, VHOST_SET_VRING_ENDIAN, ring); -} - -static int vhost_kernel_set_vring_num(struct vhost_dev *dev, - struct vhost_vring_state *ring) -{ - return vhost_kernel_call(dev, VHOST_SET_VRING_NUM, ring); -} - -static int vhost_kernel_set_vring_base(struct vhost_dev *dev, - struct vhost_vring_state *ring) -{ - return vhost_kernel_call(dev, VHOST_SET_VRING_BASE, ring); -} - -static int vhost_kernel_get_vring_base(struct vhost_dev *dev, - struct vhost_vring_state *ring) -{ - return vhost_kernel_call(dev, VHOST_GET_VRING_BASE, ring); -} - -static int vhost_kernel_set_vring_kick(struct vhost_dev *dev, - struct vhost_vring_file *file) -{ - return vhost_kernel_call(dev, VHOST_SET_VRING_KICK, file); -} - -static int vhost_kernel_set_vring_call(struct vhost_dev *dev, - struct vhost_vring_file *file) -{ - return vhost_kernel_call(dev, VHOST_SET_VRING_CALL, file); -} - -static int vhost_kernel_set_features(struct vhost_dev *dev, - uint64_t features) -{ - return vhost_kernel_call(dev, VHOST_SET_FEATURES, &features); -} - -static int vhost_kernel_get_features(struct vhost_dev *dev, - uint64_t *features) -{ - return vhost_kernel_call(dev, VHOST_GET_FEATURES, features); -} - -static int vhost_kernel_set_owner(struct vhost_dev *dev) -{ - return vhost_kernel_call(dev, VHOST_SET_OWNER, NULL); -} - -static int vhost_kernel_reset_device(struct vhost_dev *dev) -{ - return vhost_kernel_call(dev, VHOST_RESET_OWNER, NULL); -} - -static int vhost_kernel_get_vq_index(struct vhost_dev *dev, int idx) -{ - assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); - - return idx - dev->vq_index; -} - -static const VhostOps kernel_ops = { - .backend_type = VHOST_BACKEND_TYPE_KERNEL, - .vhost_backend_init = vhost_kernel_init, - .vhost_backend_cleanup = vhost_kernel_cleanup, - .vhost_backend_memslots_limit = vhost_kernel_memslots_limit, - .vhost_net_set_backend = vhost_kernel_net_set_backend, - .vhost_scsi_set_endpoint = vhost_kernel_scsi_set_endpoint, - .vhost_scsi_clear_endpoint = vhost_kernel_scsi_clear_endpoint, - .vhost_scsi_get_abi_version = vhost_kernel_scsi_get_abi_version, - .vhost_set_log_base = vhost_kernel_set_log_base, - .vhost_set_mem_table = vhost_kernel_set_mem_table, - .vhost_set_vring_addr = vhost_kernel_set_vring_addr, - .vhost_set_vring_endian = vhost_kernel_set_vring_endian, - .vhost_set_vring_num = vhost_kernel_set_vring_num, - .vhost_set_vring_base = vhost_kernel_set_vring_base, - .vhost_get_vring_base = vhost_kernel_get_vring_base, - .vhost_set_vring_kick = vhost_kernel_set_vring_kick, - .vhost_set_vring_call = vhost_kernel_set_vring_call, - .vhost_set_features = vhost_kernel_set_features, - .vhost_get_features = vhost_kernel_get_features, - .vhost_set_owner = vhost_kernel_set_owner, - .vhost_reset_device = vhost_kernel_reset_device, - .vhost_get_vq_index = vhost_kernel_get_vq_index, -}; - -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; -} |