b37556edec
This patch tries to switch to use new kernel IOTLB format V2. Previous
version may have inconsistent ABI between 32bit and 64bit machines
because of the hole after type field. Refer kernel commit
("429711aec282 vhost: switch to use new message format") for more
information.
To enable this feature, qemu need to use a new ioctl
VHOST_SET_BACKEND_FEATURE with VHOST_BACKEND_F_IOTLB_MSG_V2 bit. A new
vhost setting backend features ops was introduced. And when we try to
set features for vhost dev, we will examine the support of new IOTLB
format and enable it. This process is total transparent to guest,
which means we can have different IOTLB message type in src and dst
during migration.
The conversion of IOTLB message is straightforward, just check the
type and behave accordingly.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20200907104903.31551-3-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
195 lines
9.0 KiB
C
195 lines
9.0 KiB
C
/*
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* vhost-backend
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*
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* Copyright (c) 2013 Virtual Open Systems Sarl.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef VHOST_BACKEND_H
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#define VHOST_BACKEND_H
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#include "exec/memory.h"
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typedef enum VhostBackendType {
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VHOST_BACKEND_TYPE_NONE = 0,
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VHOST_BACKEND_TYPE_KERNEL = 1,
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VHOST_BACKEND_TYPE_USER = 2,
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VHOST_BACKEND_TYPE_VDPA = 3,
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VHOST_BACKEND_TYPE_MAX = 4,
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} VhostBackendType;
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typedef enum VhostSetConfigType {
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VHOST_SET_CONFIG_TYPE_MASTER = 0,
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VHOST_SET_CONFIG_TYPE_MIGRATION = 1,
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} VhostSetConfigType;
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struct vhost_inflight;
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struct vhost_dev;
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struct vhost_log;
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struct vhost_memory;
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struct vhost_vring_file;
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struct vhost_vring_state;
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struct vhost_vring_addr;
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struct vhost_scsi_target;
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struct vhost_iotlb_msg;
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struct vhost_virtqueue;
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typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque);
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typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev);
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typedef int (*vhost_backend_memslots_limit)(struct vhost_dev *dev);
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typedef int (*vhost_net_set_backend_op)(struct vhost_dev *dev,
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struct vhost_vring_file *file);
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typedef int (*vhost_net_set_mtu_op)(struct vhost_dev *dev, uint16_t mtu);
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typedef int (*vhost_scsi_set_endpoint_op)(struct vhost_dev *dev,
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struct vhost_scsi_target *target);
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typedef int (*vhost_scsi_clear_endpoint_op)(struct vhost_dev *dev,
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struct vhost_scsi_target *target);
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typedef int (*vhost_scsi_get_abi_version_op)(struct vhost_dev *dev,
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int *version);
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typedef int (*vhost_set_log_base_op)(struct vhost_dev *dev, uint64_t base,
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struct vhost_log *log);
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typedef int (*vhost_set_mem_table_op)(struct vhost_dev *dev,
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struct vhost_memory *mem);
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typedef int (*vhost_set_vring_addr_op)(struct vhost_dev *dev,
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struct vhost_vring_addr *addr);
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typedef int (*vhost_set_vring_endian_op)(struct vhost_dev *dev,
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struct vhost_vring_state *ring);
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typedef int (*vhost_set_vring_num_op)(struct vhost_dev *dev,
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struct vhost_vring_state *ring);
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typedef int (*vhost_set_vring_base_op)(struct vhost_dev *dev,
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struct vhost_vring_state *ring);
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typedef int (*vhost_get_vring_base_op)(struct vhost_dev *dev,
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struct vhost_vring_state *ring);
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typedef int (*vhost_set_vring_kick_op)(struct vhost_dev *dev,
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struct vhost_vring_file *file);
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typedef int (*vhost_set_vring_call_op)(struct vhost_dev *dev,
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struct vhost_vring_file *file);
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typedef int (*vhost_set_vring_busyloop_timeout_op)(struct vhost_dev *dev,
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struct vhost_vring_state *r);
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typedef int (*vhost_set_features_op)(struct vhost_dev *dev,
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uint64_t features);
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typedef int (*vhost_get_features_op)(struct vhost_dev *dev,
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uint64_t *features);
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typedef int (*vhost_set_backend_cap_op)(struct vhost_dev *dev);
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typedef int (*vhost_set_owner_op)(struct vhost_dev *dev);
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typedef int (*vhost_reset_device_op)(struct vhost_dev *dev);
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typedef int (*vhost_get_vq_index_op)(struct vhost_dev *dev, int idx);
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typedef int (*vhost_set_vring_enable_op)(struct vhost_dev *dev,
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int enable);
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typedef bool (*vhost_requires_shm_log_op)(struct vhost_dev *dev);
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typedef int (*vhost_migration_done_op)(struct vhost_dev *dev,
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char *mac_addr);
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typedef bool (*vhost_backend_can_merge_op)(struct vhost_dev *dev,
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uint64_t start1, uint64_t size1,
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uint64_t start2, uint64_t size2);
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typedef int (*vhost_vsock_set_guest_cid_op)(struct vhost_dev *dev,
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uint64_t guest_cid);
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typedef int (*vhost_vsock_set_running_op)(struct vhost_dev *dev, int start);
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typedef void (*vhost_set_iotlb_callback_op)(struct vhost_dev *dev,
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int enabled);
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typedef int (*vhost_send_device_iotlb_msg_op)(struct vhost_dev *dev,
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struct vhost_iotlb_msg *imsg);
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typedef int (*vhost_set_config_op)(struct vhost_dev *dev, const uint8_t *data,
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uint32_t offset, uint32_t size,
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uint32_t flags);
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typedef int (*vhost_get_config_op)(struct vhost_dev *dev, uint8_t *config,
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uint32_t config_len);
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typedef int (*vhost_crypto_create_session_op)(struct vhost_dev *dev,
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void *session_info,
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uint64_t *session_id);
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typedef int (*vhost_crypto_close_session_op)(struct vhost_dev *dev,
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uint64_t session_id);
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typedef bool (*vhost_backend_mem_section_filter_op)(struct vhost_dev *dev,
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MemoryRegionSection *section);
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typedef int (*vhost_get_inflight_fd_op)(struct vhost_dev *dev,
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uint16_t queue_size,
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struct vhost_inflight *inflight);
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typedef int (*vhost_set_inflight_fd_op)(struct vhost_dev *dev,
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struct vhost_inflight *inflight);
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typedef int (*vhost_dev_start_op)(struct vhost_dev *dev, bool started);
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typedef int (*vhost_vq_get_addr_op)(struct vhost_dev *dev,
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struct vhost_vring_addr *addr,
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struct vhost_virtqueue *vq);
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typedef int (*vhost_get_device_id_op)(struct vhost_dev *dev, uint32_t *dev_id);
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typedef bool (*vhost_force_iommu_op)(struct vhost_dev *dev);
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typedef struct VhostOps {
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VhostBackendType backend_type;
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vhost_backend_init vhost_backend_init;
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vhost_backend_cleanup vhost_backend_cleanup;
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vhost_backend_memslots_limit vhost_backend_memslots_limit;
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vhost_net_set_backend_op vhost_net_set_backend;
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vhost_net_set_mtu_op vhost_net_set_mtu;
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vhost_scsi_set_endpoint_op vhost_scsi_set_endpoint;
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vhost_scsi_clear_endpoint_op vhost_scsi_clear_endpoint;
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vhost_scsi_get_abi_version_op vhost_scsi_get_abi_version;
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vhost_set_log_base_op vhost_set_log_base;
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vhost_set_mem_table_op vhost_set_mem_table;
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vhost_set_vring_addr_op vhost_set_vring_addr;
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vhost_set_vring_endian_op vhost_set_vring_endian;
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vhost_set_vring_num_op vhost_set_vring_num;
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vhost_set_vring_base_op vhost_set_vring_base;
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vhost_get_vring_base_op vhost_get_vring_base;
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vhost_set_vring_kick_op vhost_set_vring_kick;
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vhost_set_vring_call_op vhost_set_vring_call;
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vhost_set_vring_busyloop_timeout_op vhost_set_vring_busyloop_timeout;
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vhost_set_features_op vhost_set_features;
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vhost_get_features_op vhost_get_features;
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vhost_set_backend_cap_op vhost_set_backend_cap;
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vhost_set_owner_op vhost_set_owner;
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vhost_reset_device_op vhost_reset_device;
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vhost_get_vq_index_op vhost_get_vq_index;
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vhost_set_vring_enable_op vhost_set_vring_enable;
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vhost_requires_shm_log_op vhost_requires_shm_log;
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vhost_migration_done_op vhost_migration_done;
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vhost_backend_can_merge_op vhost_backend_can_merge;
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vhost_vsock_set_guest_cid_op vhost_vsock_set_guest_cid;
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vhost_vsock_set_running_op vhost_vsock_set_running;
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vhost_set_iotlb_callback_op vhost_set_iotlb_callback;
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vhost_send_device_iotlb_msg_op vhost_send_device_iotlb_msg;
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vhost_get_config_op vhost_get_config;
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vhost_set_config_op vhost_set_config;
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vhost_crypto_create_session_op vhost_crypto_create_session;
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vhost_crypto_close_session_op vhost_crypto_close_session;
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vhost_backend_mem_section_filter_op vhost_backend_mem_section_filter;
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vhost_get_inflight_fd_op vhost_get_inflight_fd;
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vhost_set_inflight_fd_op vhost_set_inflight_fd;
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vhost_dev_start_op vhost_dev_start;
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vhost_vq_get_addr_op vhost_vq_get_addr;
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vhost_get_device_id_op vhost_get_device_id;
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vhost_force_iommu_op vhost_force_iommu;
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} VhostOps;
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extern const VhostOps user_ops;
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extern const VhostOps vdpa_ops;
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int vhost_set_backend_type(struct vhost_dev *dev,
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VhostBackendType backend_type);
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int vhost_backend_update_device_iotlb(struct vhost_dev *dev,
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uint64_t iova, uint64_t uaddr,
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uint64_t len,
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IOMMUAccessFlags perm);
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int vhost_backend_invalidate_device_iotlb(struct vhost_dev *dev,
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uint64_t iova, uint64_t len);
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int vhost_backend_handle_iotlb_msg(struct vhost_dev *dev,
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struct vhost_iotlb_msg *imsg);
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int vhost_user_gpu_set_socket(struct vhost_dev *dev, int fd);
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#endif /* VHOST_BACKEND_H */
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