diff options
Diffstat (limited to 'usr.sbin/bhyve/virtio.c')
| -rw-r--r-- | usr.sbin/bhyve/virtio.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/usr.sbin/bhyve/virtio.c b/usr.sbin/bhyve/virtio.c index d899a57795703..f3deb72b081c4 100644 --- a/usr.sbin/bhyve/virtio.c +++ b/usr.sbin/bhyve/virtio.c @@ -34,6 +34,7 @@ __FBSDID("$FreeBSD$"); #include <sys/uio.h> #include <machine/atomic.h> +#include <machine/vmm_snapshot.h> #include <stdio.h> #include <stdint.h> @@ -806,3 +807,150 @@ done: if (vs->vs_mtx) pthread_mutex_unlock(vs->vs_mtx); } + +#ifdef BHYVE_SNAPSHOT +int +vi_pci_pause(struct vmctx *ctx, struct pci_devinst *pi) +{ + struct virtio_softc *vs; + struct virtio_consts *vc; + + vs = pi->pi_arg; + vc = vs->vs_vc; + + vc = vs->vs_vc; + assert(vc->vc_pause != NULL); + (*vc->vc_pause)(DEV_SOFTC(vs)); + + return (0); +} + +int +vi_pci_resume(struct vmctx *ctx, struct pci_devinst *pi) +{ + struct virtio_softc *vs; + struct virtio_consts *vc; + + vs = pi->pi_arg; + vc = vs->vs_vc; + + vc = vs->vs_vc; + assert(vc->vc_resume != NULL); + (*vc->vc_resume)(DEV_SOFTC(vs)); + + return (0); +} + +static int +vi_pci_snapshot_softc(struct virtio_softc *vs, struct vm_snapshot_meta *meta) +{ + int ret; + + SNAPSHOT_VAR_OR_LEAVE(vs->vs_flags, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vs->vs_negotiated_caps, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vs->vs_curq, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vs->vs_status, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vs->vs_isr, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vs->vs_msix_cfg_idx, meta, ret, done); + +done: + return (ret); +} + +static int +vi_pci_snapshot_consts(struct virtio_consts *vc, struct vm_snapshot_meta *meta) +{ + int ret; + + SNAPSHOT_VAR_CMP_OR_LEAVE(vc->vc_nvq, meta, ret, done); + SNAPSHOT_VAR_CMP_OR_LEAVE(vc->vc_cfgsize, meta, ret, done); + SNAPSHOT_VAR_CMP_OR_LEAVE(vc->vc_hv_caps, meta, ret, done); + +done: + return (ret); +} + +static int +vi_pci_snapshot_queues(struct virtio_softc *vs, struct vm_snapshot_meta *meta) +{ + int i; + int ret; + struct virtio_consts *vc; + struct vqueue_info *vq; + uint64_t addr_size; + + vc = vs->vs_vc; + + /* Save virtio queue info */ + for (i = 0; i < vc->vc_nvq; i++) { + vq = &vs->vs_queues[i]; + + SNAPSHOT_VAR_CMP_OR_LEAVE(vq->vq_qsize, meta, ret, done); + SNAPSHOT_VAR_CMP_OR_LEAVE(vq->vq_num, meta, ret, done); + + SNAPSHOT_VAR_OR_LEAVE(vq->vq_flags, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vq->vq_last_avail, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vq->vq_next_used, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vq->vq_save_used, meta, ret, done); + SNAPSHOT_VAR_OR_LEAVE(vq->vq_msix_idx, meta, ret, done); + + SNAPSHOT_VAR_OR_LEAVE(vq->vq_pfn, meta, ret, done); + + addr_size = vq->vq_qsize * sizeof(struct virtio_desc); + SNAPSHOT_GUEST2HOST_ADDR_OR_LEAVE(vq->vq_desc, addr_size, + false, meta, ret, done); + + addr_size = (2 + vq->vq_qsize + 1) * sizeof(uint16_t); + SNAPSHOT_GUEST2HOST_ADDR_OR_LEAVE(vq->vq_avail, addr_size, + false, meta, ret, done); + + addr_size = (2 + 2 * vq->vq_qsize + 1) * sizeof(uint16_t); + SNAPSHOT_GUEST2HOST_ADDR_OR_LEAVE(vq->vq_used, addr_size, + false, meta, ret, done); + + SNAPSHOT_BUF_OR_LEAVE(vq->vq_desc, vring_size(vq->vq_qsize), + meta, ret, done); + } + +done: + return (ret); +} + +int +vi_pci_snapshot(struct vm_snapshot_meta *meta) +{ + int ret; + struct pci_devinst *pi; + struct virtio_softc *vs; + struct virtio_consts *vc; + + pi = meta->dev_data; + vs = pi->pi_arg; + vc = vs->vs_vc; + + /* Save virtio softc */ + ret = vi_pci_snapshot_softc(vs, meta); + if (ret != 0) + goto done; + + /* Save virtio consts */ + ret = vi_pci_snapshot_consts(vc, meta); + if (ret != 0) + goto done; + + /* Save virtio queue info */ + ret = vi_pci_snapshot_queues(vs, meta); + if (ret != 0) + goto done; + + /* Save device softc, if needed */ + if (vc->vc_snapshot != NULL) { + ret = (*vc->vc_snapshot)(DEV_SOFTC(vs), meta); + if (ret != 0) + goto done; + } + +done: + return (ret); +} +#endif |