diff options
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/trace-events | 1 | ||||
| -rw-r--r-- | hw/virtio/vhost-backend.c | 4 | ||||
| -rw-r--r-- | hw/virtio/vhost-user-fs.c | 6 | ||||
| -rw-r--r-- | hw/virtio/vhost-user.c | 401 | ||||
| -rw-r--r-- | hw/virtio/vhost-vdpa.c | 44 | ||||
| -rw-r--r-- | hw/virtio/vhost-vsock-common.c | 6 | ||||
| -rw-r--r-- | hw/virtio/vhost-vsock.c | 11 | ||||
| -rw-r--r-- | hw/virtio/vhost.c | 174 | ||||
| -rw-r--r-- | hw/virtio/virtio-crypto.c | 6 | ||||
| -rw-r--r-- | hw/virtio/virtio-mem.c | 105 | ||||
| -rw-r--r-- | hw/virtio/virtio-mmio.c | 27 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.c | 269 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.h | 4 | ||||
| -rw-r--r-- | hw/virtio/virtio.c | 30 |
14 files changed, 749 insertions, 339 deletions
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events index f7ad6be5fb..595ce015ff 100644 --- a/hw/virtio/trace-events +++ b/hw/virtio/trace-events @@ -53,6 +53,7 @@ vhost_vdpa_get_features(void *dev, uint64_t features) "dev: %p features: 0x%"PRI vhost_vdpa_set_owner(void *dev) "dev: %p" vhost_vdpa_vq_get_addr(void *dev, void *vq, uint64_t desc_user_addr, uint64_t avail_user_addr, uint64_t used_user_addr) "dev: %p vq: %p desc_user_addr: 0x%"PRIx64" avail_user_addr: 0x%"PRIx64" used_user_addr: 0x%"PRIx64 vhost_vdpa_get_iova_range(void *dev, uint64_t first, uint64_t last) "dev: %p first: 0x%"PRIx64" last: 0x%"PRIx64 +vhost_vdpa_set_config_call(void *dev, int fd)"dev: %p fd: %d" # virtio.c virtqueue_alloc_element(void *elem, size_t sz, unsigned in_num, unsigned out_num) "elem %p size %zd in_num %u out_num %u" diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c index b65f8f7e97..e409a865ae 100644 --- a/hw/virtio/vhost-backend.c +++ b/hw/virtio/vhost-backend.c @@ -47,7 +47,7 @@ static int vhost_kernel_cleanup(struct vhost_dev *dev) assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_KERNEL); - return close(fd); + return close(fd) < 0 ? -errno : 0; } static int vhost_kernel_memslots_limit(struct vhost_dev *dev) @@ -58,7 +58,7 @@ static int vhost_kernel_memslots_limit(struct vhost_dev *dev) 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)) { + if (val < INT_MAX && val > 0) { g_free(s); return val; } diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c index c595957983..9b0349922e 100644 --- a/hw/virtio/vhost-user-fs.c +++ b/hw/virtio/vhost-user-fs.c @@ -161,6 +161,9 @@ static void vuf_guest_notifier_mask(VirtIODevice *vdev, int idx, { VHostUserFS *fs = VHOST_USER_FS(vdev); + if (idx == VIRTIO_CONFIG_IRQ_IDX) { + return; + } vhost_virtqueue_mask(&fs->vhost_dev, vdev, idx, mask); } @@ -168,6 +171,9 @@ static bool vuf_guest_notifier_pending(VirtIODevice *vdev, int idx) { VHostUserFS *fs = VHOST_USER_FS(vdev); + if (idx == VIRTIO_CONFIG_IRQ_IDX) { + return false; + } return vhost_virtqueue_pending(&fs->vhost_dev, idx); } diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index bf6e50223c..662853513e 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -280,9 +280,10 @@ static int vhost_user_read_header(struct vhost_dev *dev, VhostUserMsg *msg) r = qemu_chr_fe_read_all(chr, p, size); if (r != size) { + int saved_errno = errno; error_report("Failed to read msg header. Read %d instead of %d." " Original request %d.", r, size, msg->hdr.request); - return -1; + return r < 0 ? -saved_errno : -EIO; } /* validate received flags */ @@ -290,7 +291,7 @@ static int vhost_user_read_header(struct vhost_dev *dev, VhostUserMsg *msg) error_report("Failed to read msg header." " Flags 0x%x instead of 0x%x.", msg->hdr.flags, VHOST_USER_REPLY_MASK | VHOST_USER_VERSION); - return -1; + return -EPROTO; } return 0; @@ -314,8 +315,9 @@ static gboolean vhost_user_read_cb(void *do_not_use, GIOCondition condition, uint8_t *p = (uint8_t *) msg; int r, size; - if (vhost_user_read_header(dev, msg) < 0) { - data->ret = -1; + r = vhost_user_read_header(dev, msg); + if (r < 0) { + data->ret = r; goto end; } @@ -324,7 +326,7 @@ static gboolean vhost_user_read_cb(void *do_not_use, GIOCondition condition, error_report("Failed to read msg header." " Size %d exceeds the maximum %zu.", msg->hdr.size, VHOST_USER_PAYLOAD_SIZE); - data->ret = -1; + data->ret = -EPROTO; goto end; } @@ -333,9 +335,10 @@ static gboolean vhost_user_read_cb(void *do_not_use, GIOCondition condition, size = msg->hdr.size; r = qemu_chr_fe_read_all(chr, p, size); if (r != size) { + int saved_errno = errno; error_report("Failed to read msg payload." " Read %d instead of %d.", r, msg->hdr.size); - data->ret = -1; + data->ret = r < 0 ? -saved_errno : -EIO; goto end; } } @@ -418,24 +421,26 @@ static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg) static int process_message_reply(struct vhost_dev *dev, const VhostUserMsg *msg) { + int ret; VhostUserMsg msg_reply; if ((msg->hdr.flags & VHOST_USER_NEED_REPLY_MASK) == 0) { return 0; } - if (vhost_user_read(dev, &msg_reply) < 0) { - return -1; + ret = vhost_user_read(dev, &msg_reply); + if (ret < 0) { + return ret; } if (msg_reply.hdr.request != msg->hdr.request) { error_report("Received unexpected msg type. " "Expected %d received %d", msg->hdr.request, msg_reply.hdr.request); - return -1; + return -EPROTO; } - return msg_reply.payload.u64 ? -1 : 0; + return msg_reply.payload.u64 ? -EIO : 0; } static bool vhost_user_one_time_request(VhostUserRequest request) @@ -472,14 +477,15 @@ static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg, if (qemu_chr_fe_set_msgfds(chr, fds, fd_num) < 0) { error_report("Failed to set msg fds."); - return -1; + return -EINVAL; } ret = qemu_chr_fe_write_all(chr, (const uint8_t *) msg, size); if (ret != size) { + int saved_errno = errno; error_report("Failed to write msg." " Wrote %d instead of %d.", ret, size); - return -1; + return ret < 0 ? -saved_errno : -EIO; } return 0; @@ -502,6 +508,7 @@ static int vhost_user_set_log_base(struct vhost_dev *dev, uint64_t base, size_t fd_num = 0; bool shmfd = virtio_has_feature(dev->protocol_features, VHOST_USER_PROTOCOL_F_LOG_SHMFD); + int ret; VhostUserMsg msg = { .hdr.request = VHOST_USER_SET_LOG_BASE, .hdr.flags = VHOST_USER_VERSION, @@ -514,21 +521,23 @@ static int vhost_user_set_log_base(struct vhost_dev *dev, uint64_t base, fds[fd_num++] = log->fd; } - if (vhost_user_write(dev, &msg, fds, fd_num) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, fds, fd_num); + if (ret < 0) { + return ret; } if (shmfd) { msg.hdr.size = 0; - if (vhost_user_read(dev, &msg) < 0) { - return -1; + ret = vhost_user_read(dev, &msg); + if (ret < 0) { + return ret; } if (msg.hdr.request != VHOST_USER_SET_LOG_BASE) { error_report("Received unexpected msg type. " "Expected %d received %d", VHOST_USER_SET_LOG_BASE, msg.hdr.request); - return -1; + return -EPROTO; } } @@ -588,7 +597,7 @@ static int vhost_user_fill_set_mem_table_msg(struct vhost_user *u, u->region_rb[i] = mr->ram_block; } else if (*fd_num == VHOST_MEMORY_BASELINE_NREGIONS) { error_report("Failed preparing vhost-user memory table msg"); - return -1; + return -ENOBUFS; } vhost_user_fill_msg_region(®ion_buffer, reg, offset); msg->payload.memory.regions[*fd_num] = region_buffer; @@ -604,14 +613,14 @@ static int vhost_user_fill_set_mem_table_msg(struct vhost_user *u, if (!*fd_num) { error_report("Failed initializing vhost-user memory map, " "consider using -object memory-backend-file share=on"); - return -1; + return -EINVAL; } msg->hdr.size = sizeof(msg->payload.memory.nregions); msg->hdr.size += sizeof(msg->payload.memory.padding); msg->hdr.size += *fd_num * sizeof(VhostUserMemoryRegion); - return 1; + return 0; } static inline bool reg_equal(struct vhost_memory_region *shadow_reg, @@ -741,8 +750,9 @@ static int send_remove_regions(struct vhost_dev *dev, vhost_user_fill_msg_region(®ion_buffer, shadow_reg, 0); msg->payload.mem_reg.region = region_buffer; - if (vhost_user_write(dev, msg, &fd, 1) < 0) { - return -1; + ret = vhost_user_write(dev, msg, &fd, 1); + if (ret < 0) { + return ret; } if (reply_supported) { @@ -801,15 +811,17 @@ static int send_add_regions(struct vhost_dev *dev, vhost_user_fill_msg_region(®ion_buffer, reg, offset); msg->payload.mem_reg.region = region_buffer; - if (vhost_user_write(dev, msg, &fd, 1) < 0) { - return -1; + ret = vhost_user_write(dev, msg, &fd, 1); + if (ret < 0) { + return ret; } if (track_ramblocks) { uint64_t reply_gpa; - if (vhost_user_read(dev, &msg_reply) < 0) { - return -1; + ret = vhost_user_read(dev, &msg_reply); + if (ret < 0) { + return ret; } reply_gpa = msg_reply.payload.mem_reg.region.guest_phys_addr; @@ -819,7 +831,7 @@ static int send_add_regions(struct vhost_dev *dev, "Expected %d received %d", __func__, VHOST_USER_ADD_MEM_REG, msg_reply.hdr.request); - return -1; + return -EPROTO; } /* @@ -830,7 +842,7 @@ static int send_add_regions(struct vhost_dev *dev, error_report("%s: Unexpected size for postcopy reply " "%d vs %d", __func__, msg_reply.hdr.size, msg->hdr.size); - return -1; + return -EPROTO; } /* Get the postcopy client base from the backend's reply. */ @@ -846,7 +858,7 @@ static int send_add_regions(struct vhost_dev *dev, "Got guest physical address %" PRIX64 ", expected " "%" PRIX64, __func__, reply_gpa, dev->mem->regions[reg_idx].guest_phys_addr); - return -1; + return -EPROTO; } } else if (reply_supported) { ret = process_message_reply(dev, msg); @@ -887,6 +899,7 @@ static int vhost_user_add_remove_regions(struct vhost_dev *dev, struct scrub_regions rem_reg[VHOST_USER_MAX_RAM_SLOTS]; uint64_t shadow_pcb[VHOST_USER_MAX_RAM_SLOTS] = {}; int nr_add_reg, nr_rem_reg; + int ret; msg->hdr.size = sizeof(msg->payload.mem_reg); @@ -894,16 +907,20 @@ static int vhost_user_add_remove_regions(struct vhost_dev *dev, scrub_shadow_regions(dev, add_reg, &nr_add_reg, rem_reg, &nr_rem_reg, shadow_pcb, track_ramblocks); - if (nr_rem_reg && send_remove_regions(dev, rem_reg, nr_rem_reg, msg, - reply_supported) < 0) - { - goto err; + if (nr_rem_reg) { + ret = send_remove_regions(dev, rem_reg, nr_rem_reg, msg, + reply_supported); + if (ret < 0) { + goto err; + } } - if (nr_add_reg && send_add_regions(dev, add_reg, nr_add_reg, msg, - shadow_pcb, reply_supported, track_ramblocks) < 0) - { - goto err; + if (nr_add_reg) { + ret = send_add_regions(dev, add_reg, nr_add_reg, msg, shadow_pcb, + reply_supported, track_ramblocks); + if (ret < 0) { + goto err; + } } if (track_ramblocks) { @@ -918,8 +935,9 @@ static int vhost_user_add_remove_regions(struct vhost_dev *dev, msg->hdr.size = sizeof(msg->payload.u64); msg->payload.u64 = 0; /* OK */ - if (vhost_user_write(dev, msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, msg, NULL, 0); + if (ret < 0) { + return ret; } } @@ -931,7 +949,7 @@ err: sizeof(uint64_t) * VHOST_USER_MAX_RAM_SLOTS); } - return -1; + return ret; } static int vhost_user_set_mem_table_postcopy(struct vhost_dev *dev, @@ -944,6 +962,7 @@ static int vhost_user_set_mem_table_postcopy(struct vhost_dev *dev, size_t fd_num = 0; VhostUserMsg msg_reply; int region_i, msg_i; + int ret; VhostUserMsg msg = { .hdr.flags = VHOST_USER_VERSION, @@ -961,29 +980,32 @@ static int vhost_user_set_mem_table_postcopy(struct vhost_dev *dev, } if (config_mem_slots) { - if (vhost_user_add_remove_regions(dev, &msg, reply_supported, - true) < 0) { - return -1; + ret = vhost_user_add_remove_regions(dev, &msg, reply_supported, true); + if (ret < 0) { + return ret; } } else { - if (vhost_user_fill_set_mem_table_msg(u, dev, &msg, fds, &fd_num, - true) < 0) { - return -1; + ret = vhost_user_fill_set_mem_table_msg(u, dev, &msg, fds, &fd_num, + true); + if (ret < 0) { + return ret; } - if (vhost_user_write(dev, &msg, fds, fd_num) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, fds, fd_num); + if (ret < 0) { + return ret; } - if (vhost_user_read(dev, &msg_reply) < 0) { - return -1; + ret = vhost_user_read(dev, &msg_reply); + if (ret < 0) { + return ret; } if (msg_reply.hdr.request != VHOST_USER_SET_MEM_TABLE) { error_report("%s: Received unexpected msg type." "Expected %d received %d", __func__, VHOST_USER_SET_MEM_TABLE, msg_reply.hdr.request); - return -1; + return -EPROTO; } /* @@ -994,7 +1016,7 @@ static int vhost_user_set_mem_table_postcopy(struct vhost_dev *dev, error_report("%s: Unexpected size for postcopy reply " "%d vs %d", __func__, msg_reply.hdr.size, msg.hdr.size); - return -1; + return -EPROTO; } memset(u->postcopy_client_bases, 0, @@ -1024,7 +1046,7 @@ static int vhost_user_set_mem_table_postcopy(struct vhost_dev *dev, error_report("%s: postcopy reply not fully consumed " "%d vs %zd", __func__, msg_i, fd_num); - return -1; + return -EIO; } /* @@ -1035,8 +1057,9 @@ static int vhost_user_set_mem_table_postcopy(struct vhost_dev *dev, /* TODO: Use this for failure cases as well with a bad value. */ msg.hdr.size = sizeof(msg.payload.u64); msg.payload.u64 = 0; /* OK */ - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } } @@ -1055,6 +1078,7 @@ static int vhost_user_set_mem_table(struct vhost_dev *dev, bool config_mem_slots = virtio_has_feature(dev->protocol_features, VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS); + int ret; if (do_postcopy) { /* @@ -1074,17 +1098,20 @@ static int vhost_user_set_mem_table(struct vhost_dev *dev, } if (config_mem_slots) { - if (vhost_user_add_remove_regions(dev, &msg, reply_supported, - false) < 0) { - return -1; + ret = vhost_user_add_remove_regions(dev, &msg, reply_supported, false); + if (ret < 0) { + return ret; } } else { - if (vhost_user_fill_set_mem_table_msg(u, dev, &msg, fds, &fd_num, - false) < 0) { - return -1; + ret = vhost_user_fill_set_mem_table_msg(u, dev, &msg, fds, &fd_num, + false); + if (ret < 0) { + return ret; } - if (vhost_user_write(dev, &msg, fds, fd_num) < 0) { - return -1; + + ret = vhost_user_write(dev, &msg, fds, fd_num); + if (ret < 0) { + return ret; } if (reply_supported) { @@ -1109,14 +1136,10 @@ static int vhost_user_set_vring_endian(struct vhost_dev *dev, if (!cross_endian) { error_report("vhost-user trying to send unhandled ioctl"); - return -1; + return -ENOTSUP; } - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; - } - - return 0; + return vhost_user_write(dev, &msg, NULL, 0); } static int vhost_set_vring(struct vhost_dev *dev, @@ -1130,11 +1153,7 @@ static int vhost_set_vring(struct vhost_dev *dev, .hdr.size = sizeof(msg.payload.state), }; - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; - } - - return 0; + return vhost_user_write(dev, &msg, NULL, 0); } static int vhost_user_set_vring_num(struct vhost_dev *dev, @@ -1182,16 +1201,25 @@ static int vhost_user_set_vring_enable(struct vhost_dev *dev, int enable) int i; if (!virtio_has_feature(dev->features, VHOST_USER_F_PROTOCOL_FEATURES)) { - return -1; + return -EINVAL; } for (i = 0; i < dev->nvqs; ++i) { + int ret; struct vhost_vring_state state = { .index = dev->vq_index + i, .num = enable, }; - vhost_set_vring(dev, VHOST_USER_SET_VRING_ENABLE, &state); + ret = vhost_set_vring(dev, VHOST_USER_SET_VRING_ENABLE, &state); + if (ret < 0) { + /* + * Restoring the previous state is likely infeasible, as well as + * proceeding regardless the error, so just bail out and hope for + * the device-level recovery. + */ + return ret; + } } return 0; @@ -1200,6 +1228,7 @@ static int vhost_user_set_vring_enable(struct vhost_dev *dev, int enable) static int vhost_user_get_vring_base(struct vhost_dev *dev, struct vhost_vring_state *ring) { + int ret; VhostUserMsg msg = { .hdr.request = VHOST_USER_GET_VRING_BASE, .hdr.flags = VHOST_USER_VERSION, @@ -1209,23 +1238,25 @@ static int vhost_user_get_vring_base(struct vhost_dev *dev, vhost_user_host_notifier_remove(dev, ring->index); - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } - if (vhost_user_read(dev, &msg) < 0) { - return -1; + ret = vhost_user_read(dev, &msg); + if (ret < 0) { + return ret; } if (msg.hdr.request != VHOST_USER_GET_VRING_BASE) { error_report("Received unexpected msg type. Expected %d received %d", VHOST_USER_GET_VRING_BASE, msg.hdr.request); - return -1; + return -EPROTO; } if (msg.hdr.size != sizeof(msg.payload.state)) { error_report("Received bad msg size."); - return -1; + return -EPROTO; } *ring = msg.payload.state; @@ -1252,11 +1283,7 @@ static int vhost_set_vring_file(struct vhost_dev *dev, msg.payload.u64 |= VHOST_USER_VRING_NOFD_MASK; } - if (vhost_user_write(dev, &msg, fds, fd_num) < 0) { - return -1; - } - - return 0; + return vhost_user_write(dev, &msg, fds, fd_num); } static int vhost_user_set_vring_kick(struct vhost_dev *dev, @@ -1274,6 +1301,7 @@ static int vhost_user_set_vring_call(struct vhost_dev *dev, static int vhost_user_get_u64(struct vhost_dev *dev, int request, uint64_t *u64) { + int ret; VhostUserMsg msg = { .hdr.request = request, .hdr.flags = VHOST_USER_VERSION, @@ -1283,23 +1311,25 @@ static int vhost_user_get_u64(struct vhost_dev *dev, int request, uint64_t *u64) return 0; } - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } - if (vhost_user_read(dev, &msg) < 0) { - return -1; + ret = vhost_user_read(dev, &msg); + if (ret < 0) { + return ret; } if (msg.hdr.request != request) { error_report("Received unexpected msg type. Expected %d received %d", request, msg.hdr.request); - return -1; + return -EPROTO; } if (msg.hdr.size != sizeof(msg.payload.u64)) { error_report("Received bad msg size."); - return -1; + return -EPROTO; } *u64 = msg.payload.u64; @@ -1337,6 +1367,7 @@ static int enforce_reply(struct vhost_dev *dev, static int vhost_user_set_vring_addr(struct vhost_dev *dev, struct vhost_vring_addr *addr) { + int ret; VhostUserMsg msg = { .hdr.request = VHOST_USER_SET_VRING_ADDR, .hdr.flags = VHOST_USER_VERSION, @@ -1357,8 +1388,9 @@ static int vhost_user_set_vring_addr(struct vhost_dev *dev, msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; } - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } if (wait_for_reply) { @@ -1377,6 +1409,7 @@ static int vhost_user_set_u64(struct vhost_dev *dev, int request, uint64_t u64, .payload.u64 = u64, .hdr.size = sizeof(msg.payload.u64), }; + int ret; if (wait_for_reply) { bool reply_supported = virtio_has_feature(dev->protocol_features, @@ -1386,8 +1419,9 @@ static int vhost_user_set_u64(struct vhost_dev *dev, int request, uint64_t u64, } } - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } if (wait_for_reply) { @@ -1424,11 +1458,7 @@ static int vhost_user_set_owner(struct vhost_dev *dev) .hdr.flags = VHOST_USER_VERSION, }; - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -EPROTO; - } - - return 0; + return vhost_user_write(dev, &msg, NULL, 0); } static int vhost_user_get_max_memslots(struct vhost_dev *dev, @@ -1459,26 +1489,16 @@ static int vhost_user_reset_device(struct vhost_dev *dev) ? VHOST_USER_RESET_DEVICE : VHOST_USER_RESET_OWNER; - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; - } - - return 0; + return vhost_user_write(dev, &msg, NULL, 0); } static int vhost_user_slave_handle_config_change(struct vhost_dev *dev) { - int ret = -1; - - if (!dev->config_ops) { - return -1; + if (!dev->config_ops || !dev->config_ops->vhost_dev_config_notifier) { + return -ENOSYS; } - if (dev->config_ops->vhost_dev_config_notifier) { - ret = dev->config_ops->vhost_dev_config_notifier(dev); - } - - return ret; + return dev->config_ops->vhost_dev_config_notifier(dev); } static int vhost_user_slave_handle_vring_host_notifier(struct vhost_dev *dev, @@ -1497,7 +1517,7 @@ static int vhost_user_slave_handle_vring_host_notifier(struct vhost_dev *dev, if (!virtio_has_feature(dev->protocol_features, VHOST_USER_PROTOCOL_F_HOST_NOTIFIER) || vdev == NULL || queue_idx >= virtio_get_num_queues(vdev)) { - return -1; + return -EINVAL; } n = &user->notifier[queue_idx]; @@ -1515,13 +1535,13 @@ static int vhost_user_slave_handle_vring_host_notifier(struct vhost_dev *dev, /* Sanity check. */ if (area->size != page_size) { - return -1; + return -EINVAL; } addr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, area->offset); if (addr == MAP_FAILED) { - return -1; + return -EFAULT; } name = g_strdup_printf("vhost-user/host-notifier@%p mmaps[%d]", @@ -1534,7 +1554,7 @@ static int vhost_user_slave_handle_vring_host_notifier(struct vhost_dev *dev, if (virtio_queue_set_host_notifier_mr(vdev, queue_idx, &n->mr, true)) { object_unparent(OBJECT(&n->mr)); munmap(addr, page_size); - return -1; + return -ENXIO; } n->addr = addr; @@ -1664,14 +1684,15 @@ static int vhost_setup_slave_channel(struct vhost_dev *dev) } if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) { + int saved_errno = errno; error_report("socketpair() failed"); - return -1; + return -saved_errno; } ioc = QIO_CHANNEL(qio_channel_socket_new_fd(sv[0], &local_err)); if (!ioc) { error_report_err(local_err); - return -1; + return -ECONNREFUSED; } u->slave_ioc = ioc; slave_update_read_handler(dev, NULL); @@ -1778,35 +1799,38 @@ static int vhost_user_postcopy_advise(struct vhost_dev *dev, Error **errp) struct vhost_user *u = dev->opaque; CharBackend *chr = u->user->chr; int ufd; + int ret; VhostUserMsg msg = { .hdr.request = VHOST_USER_POSTCOPY_ADVISE, .hdr.flags = VHOST_USER_VERSION, }; - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { error_setg(errp, "Failed to send postcopy_advise to vhost"); - return -1; + return ret; } - if (vhost_user_read(dev, &msg) < 0) { + ret = vhost_user_read(dev, &msg); + if (ret < 0) { error_setg(errp, "Failed to get postcopy_advise reply from vhost"); - return -1; + return ret; } if (msg.hdr.request != VHOST_USER_POSTCOPY_ADVISE) { error_setg(errp, "Unexpected msg type. Expected %d received %d", VHOST_USER_POSTCOPY_ADVISE, msg.hdr.request); - return -1; + return -EPROTO; } if (msg.hdr.size) { error_setg(errp, "Received bad msg size."); - return -1; + return -EPROTO; } ufd = qemu_chr_fe_get_msgfd(chr); if (ufd < 0) { error_setg(errp, "%s: Failed to get ufd", __func__); - return -1; + return -EIO; } qemu_set_nonblock(ufd); @@ -1820,7 +1844,7 @@ static int vhost_user_postcopy_advise(struct vhost_dev *dev, Error **errp) return 0; #else error_setg(errp, "Postcopy not supported on non-Linux systems"); - return -1; + return -ENOSYS; #endif } @@ -1836,10 +1860,13 @@ static int vhost_user_postcopy_listen(struct vhost_dev *dev, Error **errp) .hdr.flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK, }; u->postcopy_listen = true; + trace_vhost_user_postcopy_listen(); - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { + + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { error_setg(errp, "Failed to send postcopy_listen to vhost"); - return -1; + return ret; } ret = process_message_reply(dev, &msg); @@ -1864,9 +1891,11 @@ static int vhost_user_postcopy_end(struct vhost_dev *dev, Error **errp) struct vhost_user *u = dev->opaque; trace_vhost_user_postcopy_end_entry(); - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { + + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { error_setg(errp, "Failed to send postcopy_end to vhost"); - return -1; + return ret; } ret = process_message_reply(dev, &msg); @@ -2115,7 +2144,7 @@ static int vhost_user_migration_done(struct vhost_dev *dev, char* mac_addr) return vhost_user_write(dev, &msg, NULL, 0); } - return -1; + return -ENOTSUP; } static bool vhost_user_can_merge(struct vhost_dev *dev, @@ -2136,6 +2165,7 @@ static int vhost_user_net_set_mtu(struct vhost_dev *dev, uint16_t mtu) VhostUserMsg msg; bool reply_supported = virtio_has_feature(dev->protocol_features, VHOST_USER_PROTOCOL_F_REPLY_ACK); + int ret; if (!(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_NET_MTU))) { return 0; @@ -2149,8 +2179,9 @@ static int vhost_user_net_set_mtu(struct vhost_dev *dev, uint16_t mtu) msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; } - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } /* If reply_ack supported, slave has to ack specified MTU is valid */ @@ -2164,6 +2195,7 @@ static int vhost_user_net_set_mtu(struct vhost_dev *dev, uint16_t mtu) static int vhost_user_send_device_iotlb_msg(struct vhost_dev *dev, struct vhost_iotlb_msg *imsg) { + int ret; VhostUserMsg msg = { .hdr.request = VHOST_USER_IOTLB_MSG, .hdr.size = sizeof(msg.payload.iotlb), @@ -2171,8 +2203,9 @@ static int vhost_user_send_device_iotlb_msg(struct vhost_dev *dev, .payload.iotlb = *imsg, }; - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -EFAULT; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } return process_message_reply(dev, &msg); @@ -2187,6 +2220,7 @@ static void vhost_user_set_iotlb_callback(struct vhost_dev *dev, int enabled) static int vhost_user_get_config(struct vhost_dev *dev, uint8_t *config, uint32_t config_len, Error **errp) { + int ret; VhostUserMsg msg = { .hdr.request = VHOST_USER_GET_CONFIG, .hdr.flags = VHOST_USER_VERSION, @@ -2203,26 +2237,28 @@ static int vhost_user_get_config(struct vhost_dev *dev, uint8_t *config, msg.payload.config.offset = 0; msg.payload.config.size = config_len; - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - error_setg_errno(errp, EPROTO, "vhost_get_config failed"); - return -EPROTO; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "vhost_get_config failed"); + return ret; } - if (vhost_user_read(dev, &msg) < 0) { - error_setg_errno(errp, EPROTO, "vhost_get_config failed"); - return -EPROTO; + ret = vhost_user_read(dev, &msg); + if (ret < 0) { + error_setg_errno(errp, -ret, "vhost_get_config failed"); + return ret; } if (msg.hdr.request != VHOST_USER_GET_CONFIG) { error_setg(errp, "Received unexpected msg type. Expected %d received %d", VHOST_USER_GET_CONFIG, msg.hdr.request); - return -EINVAL; + return -EPROTO; } if (msg.hdr.size != VHOST_USER_CONFIG_HDR_SIZE + config_len) { error_setg(errp, "Received bad msg size."); - return -EINVAL; + return -EPROTO; } memcpy(config, msg.payload.config.region, config_len); @@ -2233,6 +2269,7 @@ static int vhost_user_get_config(struct vhost_dev *dev, uint8_t *config, static int vhost_user_set_config(struct vhost_dev *dev, const uint8_t *data, uint32_t offset, uint32_t size, uint32_t flags) { + int ret; uint8_t *p; bool reply_supported = virtio_has_feature(dev->protocol_features, VHOST_USER_PROTOCOL_F_REPLY_ACK); @@ -2245,7 +2282,7 @@ static int vhost_user_set_config(struct vhost_dev *dev, const uint8_t *data, if (!virtio_has_feature(dev->protocol_features, VHOST_USER_PROTOCOL_F_CONFIG)) { - return -1; + return -ENOTSUP; } if (reply_supported) { @@ -2253,7 +2290,7 @@ static int vhost_user_set_config(struct vhost_dev *dev, const uint8_t *data, } if (size > VHOST_USER_MAX_CONFIG_SIZE) { - return -1; + return -EINVAL; } msg.payload.config.offset = offset, @@ -2262,8 +2299,9 @@ static int vhost_user_set_config(struct vhost_dev *dev, const uint8_t *data, p = msg.payload.config.region; memcpy(p, data, size); - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } if (reply_supported) { @@ -2277,6 +2315,7 @@ static int vhost_user_crypto_create_session(struct vhost_dev *dev, void *session_info, uint64_t *session_id) { + int ret; bool crypto_session = virtio_has_feature(dev->protocol_features, VHOST_USER_PROTOCOL_F_CRYPTO_SESSION); CryptoDevBackendSymSessionInfo *sess_info = session_info; @@ -2290,7 +2329,7 @@ static int vhost_user_crypto_create_session(struct vhost_dev *dev, if (!crypto_session) { error_report("vhost-user trying to send unhandled ioctl"); - return -1; + return -ENOTSUP; } memcpy(&msg.payload.session.session_setup_data, sess_info, @@ -2303,31 +2342,35 @@ static int vhost_user_crypto_create_session(struct vhost_dev *dev, memcpy(&msg.payload.session.auth_key, sess_info->auth_key, sess_info->auth_key_len); } - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - error_report("vhost_user_write() return -1, create session failed"); - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + error_report("vhost_user_write() return %d, create session failed", + ret); + return ret; } - if (vhost_user_read(dev, &msg) < 0) { - error_report("vhost_user_read() return -1, create session failed"); - return -1; + ret = vhost_user_read(dev, &msg); + if (ret < 0) { + error_report("vhost_user_read() return %d, create session failed", + ret); + return ret; } if (msg.hdr.request != VHOST_USER_CREATE_CRYPTO_SESSION) { error_report("Received unexpected msg type. Expected %d received %d", VHOST_USER_CREATE_CRYPTO_SESSION, msg.hdr.request); - return -1; + return -EPROTO; } if (msg.hdr.size != sizeof(msg.payload.session)) { error_report("Received bad msg size."); - return -1; + return -EPROTO; } if (msg.payload.session.session_id < 0) { error_report("Bad session id: %" PRId64 "", msg.payload.session.session_id); - return -1; + return -EINVAL; } *session_id = msg.payload.session.session_id; @@ -2337,6 +2380,7 @@ static int vhost_user_crypto_create_session(struct vhost_dev *dev, static int vhost_user_crypto_close_session(struct vhost_dev *dev, uint64_t session_id) { + int ret; bool crypto_session = virtio_has_feature(dev->protocol_features, VHOST_USER_PROTOCOL_F_CRYPTO_SESSION); VhostUserMsg msg = { @@ -2348,12 +2392,14 @@ vhost_user_crypto_close_session(struct vhost_dev *dev, uint64_t session_id) if (!crypto_session) { error_report("vhost-user trying to send unhandled ioctl"); - return -1; + return -ENOTSUP; } - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - error_report("vhost_user_write() return -1, close session failed"); - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + error_report("vhost_user_write() return %d, close session failed", + ret); + return ret; } return 0; @@ -2375,6 +2421,7 @@ static int vhost_user_get_inflight_fd(struct vhost_dev *dev, { void *addr; int fd; + int ret; struct vhost_user *u = dev->opaque; CharBackend *chr = u->user->chr; VhostUserMsg msg = { @@ -2390,24 +2437,26 @@ static int vhost_user_get_inflight_fd(struct vhost_dev *dev, return 0; } - if (vhost_user_write(dev, &msg, NULL, 0) < 0) { - return -1; + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; } - if (vhost_user_read(dev, &msg) < 0) { - return -1; + ret = vhost_user_read(dev, &msg); + if (ret < 0) { + return ret; } if (msg.hdr.request != VHOST_USER_GET_INFLIGHT_FD) { error_report("Received unexpected msg type. " "Expected %d received %d", VHOST_USER_GET_INFLIGHT_FD, msg.hdr.request); - return -1; + return -EPROTO; } if (msg.hdr.size != sizeof(msg.payload.inflight)) { error_report("Received bad msg size."); - return -1; + return -EPROTO; } if (!msg.payload.inflight.mmap_size) { @@ -2417,7 +2466,7 @@ static int vhost_user_get_inflight_fd(struct vhost_dev *dev, fd = qemu_chr_fe_get_msgfd(chr); if (fd < 0) { error_report("Failed to get mem fd"); - return -1; + return -EIO; } addr = mmap(0, msg.payload.inflight.mmap_size, PROT_READ | PROT_WRITE, @@ -2426,7 +2475,7 @@ static int vhost_user_get_inflight_fd(struct vhost_dev *dev, if (addr == MAP_FAILED) { error_report("Failed to mmap mem fd"); close(fd); - return -1; + return -EFAULT; } inflight->addr = addr; @@ -2456,11 +2505,7 @@ static int vhost_user_set_inflight_fd(struct vhost_dev *dev, return 0; } - if (vhost_user_write(dev, &msg, &inflight->fd, 1) < 0) { - return -1; - } - - return 0; + return vhost_user_write(dev, &msg, &inflight->fd, 1); } bool vhost_user_init(VhostUserState *user, CharBackend *chr, Error **errp) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index bcaf00e09f..ac0cb575fb 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -292,18 +292,34 @@ static int vhost_vdpa_call(struct vhost_dev *dev, unsigned long int request, return ret < 0 ? -errno : ret; } -static void vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status) +static int vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status) { uint8_t s; + int ret; trace_vhost_vdpa_add_status(dev, status); - if (vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &s)) { - return; + ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &s); + if (ret < 0) { + return ret; } s |= status; - vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &s); + ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &s); + if (ret < 0) { + return ret; + } + + ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &s); + if (ret < 0) { + return ret; + } + + if (!(s & status)) { + return -EIO; + } + + return 0; } static void vhost_vdpa_get_iova_range(struct vhost_vdpa *v) @@ -484,7 +500,7 @@ static int vhost_vdpa_set_mem_table(struct vhost_dev *dev, } } if (mem->padding) { - return -1; + return -EINVAL; } return 0; @@ -501,14 +517,11 @@ static int vhost_vdpa_set_features(struct vhost_dev *dev, trace_vhost_vdpa_set_features(dev, features); ret = vhost_vdpa_call(dev, VHOST_SET_FEATURES, &features); - uint8_t status = 0; if (ret) { return ret; } - vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK); - vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &status); - return !(status & VIRTIO_CONFIG_S_FEATURES_OK); + return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK); } static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev) @@ -650,12 +663,8 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) } if (started) { - uint8_t status = 0; memory_listener_register(&v->listener, &address_space_memory); - vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK); - vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &status); - - return !(status & VIRTIO_CONFIG_S_DRIVER_OK); + return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK); } else { vhost_vdpa_reset_device(dev); vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | @@ -725,6 +734,12 @@ static int vhost_vdpa_set_vring_call(struct vhost_dev *dev, trace_vhost_vdpa_set_vring_call(dev, file->index, file->fd); return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file); } +static int vhost_vdpa_set_config_call(struct vhost_dev *dev, + int fd) +{ + trace_vhost_vdpa_set_config_call(dev, fd); + return vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG_CALL, &fd); +} static int vhost_vdpa_get_features(struct vhost_dev *dev, uint64_t *features) @@ -795,4 +810,5 @@ const VhostOps vdpa_ops = { .vhost_get_device_id = vhost_vdpa_get_device_id, .vhost_vq_get_addr = vhost_vdpa_vq_get_addr, .vhost_force_iommu = vhost_vdpa_force_iommu, + .vhost_set_config_call = vhost_vdpa_set_config_call, }; diff --git a/hw/virtio/vhost-vsock-common.c b/hw/virtio/vhost-vsock-common.c index 3f3771274e..d1b9c027b6 100644 --- a/hw/virtio/vhost-vsock-common.c +++ b/hw/virtio/vhost-vsock-common.c @@ -125,6 +125,9 @@ static void vhost_vsock_common_guest_notifier_mask(VirtIODevice *vdev, int idx, { VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev); + if (idx == VIRTIO_CONFIG_IRQ_IDX) { + return; + } vhost_virtqueue_mask(&vvc->vhost_dev, vdev, idx, mask); } @@ -133,6 +136,9 @@ static bool vhost_vsock_common_guest_notifier_pending(VirtIODevice *vdev, { VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev); + if (idx == VIRTIO_CONFIG_IRQ_IDX) { + return false; + } return vhost_virtqueue_pending(&vvc->vhost_dev, idx); } diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c index 478c0c9a87..433d42d897 100644 --- a/hw/virtio/vhost-vsock.c +++ b/hw/virtio/vhost-vsock.c @@ -171,6 +171,10 @@ static void vhost_vsock_device_realize(DeviceState *dev, Error **errp) ret = vhost_dev_init(&vvc->vhost_dev, (void *)(uintptr_t)vhostfd, VHOST_BACKEND_TYPE_KERNEL, 0, errp); if (ret < 0) { + /* + * vhostfd is closed by vhost_dev_cleanup, which is called + * by vhost_dev_init on initialization error. + */ goto err_virtio; } @@ -183,15 +187,10 @@ static void vhost_vsock_device_realize(DeviceState *dev, Error **errp) return; err_vhost_dev: - vhost_dev_cleanup(&vvc->vhost_dev); /* vhost_dev_cleanup() closes the vhostfd passed to vhost_dev_init() */ - vhostfd = -1; + vhost_dev_cleanup(&vvc->vhost_dev); err_virtio: vhost_vsock_common_unrealize(vdev); - if (vhostfd >= 0) { - close(vhostfd); - } - return; } static void vhost_vsock_device_unrealize(DeviceState *dev) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 20913cf8fb..cbf3b792da 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -33,11 +33,13 @@ #define _VHOST_DEBUG 1 #ifdef _VHOST_DEBUG -#define VHOST_OPS_DEBUG(fmt, ...) \ - do { error_report(fmt ": %s (%d)", ## __VA_ARGS__, \ - strerror(errno), errno); } while (0) +#define VHOST_OPS_DEBUG(retval, fmt, ...) \ + do { \ + error_report(fmt ": %s (%d)", ## __VA_ARGS__, \ + strerror(-retval), -retval); \ + } while (0) #else -#define VHOST_OPS_DEBUG(fmt, ...) \ +#define VHOST_OPS_DEBUG(retval, fmt, ...) \ do { } while (0) #endif @@ -297,7 +299,7 @@ static inline void vhost_dev_log_resize(struct vhost_dev *dev, uint64_t size) releasing the current log, to ensure no logging is lost */ r = dev->vhost_ops->vhost_set_log_base(dev, log_base, log); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_log_base failed"); + VHOST_OPS_DEBUG(r, "vhost_set_log_base failed"); } vhost_log_put(dev, true); @@ -550,7 +552,7 @@ static void vhost_commit(MemoryListener *listener) if (!dev->log_enabled) { r = dev->vhost_ops->vhost_set_mem_table(dev, dev->mem); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_mem_table failed"); + VHOST_OPS_DEBUG(r, "vhost_set_mem_table failed"); } goto out; } @@ -564,7 +566,7 @@ static void vhost_commit(MemoryListener *listener) } r = dev->vhost_ops->vhost_set_mem_table(dev, dev->mem); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_mem_table failed"); + VHOST_OPS_DEBUG(r, "vhost_set_mem_table failed"); } /* To log less, can only decrease log size after table update. */ if (dev->log_size > log_size + VHOST_LOG_BUFFER) { @@ -803,8 +805,8 @@ static int vhost_virtqueue_set_addr(struct vhost_dev *dev, if (dev->vhost_ops->vhost_vq_get_addr) { r = dev->vhost_ops->vhost_vq_get_addr(dev, &addr, vq); if (r < 0) { - VHOST_OPS_DEBUG("vhost_vq_get_addr failed"); - return -errno; + VHOST_OPS_DEBUG(r, "vhost_vq_get_addr failed"); + return r; } } else { addr.desc_user_addr = (uint64_t)(unsigned long)vq->desc; @@ -816,10 +818,9 @@ static int vhost_virtqueue_set_addr(struct vhost_dev *dev, addr.flags = enable_log ? (1 << VHOST_VRING_F_LOG) : 0; r = dev->vhost_ops->vhost_set_vring_addr(dev, &addr); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_vring_addr failed"); - return -errno; + VHOST_OPS_DEBUG(r, "vhost_set_vring_addr failed"); } - return 0; + return r; } static int vhost_dev_set_features(struct vhost_dev *dev, @@ -840,19 +841,19 @@ static int vhost_dev_set_features(struct vhost_dev *dev, } r = dev->vhost_ops->vhost_set_features(dev, features); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_features failed"); + VHOST_OPS_DEBUG(r, "vhost_set_features failed"); goto out; } if (dev->vhost_ops->vhost_set_backend_cap) { r = dev->vhost_ops->vhost_set_backend_cap(dev); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_backend_cap failed"); + VHOST_OPS_DEBUG(r, "vhost_set_backend_cap failed"); goto out; } } out: - return r < 0 ? -errno : 0; + return r; } static int vhost_dev_set_log(struct vhost_dev *dev, bool enable_log) @@ -999,22 +1000,17 @@ static int vhost_virtqueue_set_vring_endian_legacy(struct vhost_dev *dev, bool is_big_endian, int vhost_vq_index) { + int r; struct vhost_vring_state s = { .index = vhost_vq_index, .num = is_big_endian }; - if (!dev->vhost_ops->vhost_set_vring_endian(dev, &s)) { - return 0; - } - - VHOST_OPS_DEBUG("vhost_set_vring_endian failed"); - if (errno == ENOTTY) { - error_report("vhost does not support cross-endian"); - return -ENOSYS; + r = dev->vhost_ops->vhost_set_vring_endian(dev, &s); + if (r < 0) { + VHOST_OPS_DEBUG(r, "vhost_set_vring_endian failed"); } - - return -errno; + return r; } static int vhost_memory_region_lookup(struct vhost_dev *hdev, @@ -1106,15 +1102,15 @@ static int vhost_virtqueue_start(struct vhost_dev *dev, vq->num = state.num = virtio_queue_get_num(vdev, idx); r = dev->vhost_ops->vhost_set_vring_num(dev, &state); if (r) { - VHOST_OPS_DEBUG("vhost_set_vring_num failed"); - return -errno; + VHOST_OPS_DEBUG(r, "vhost_set_vring_num failed"); + return r; } state.num = virtio_queue_get_last_avail_idx(vdev, idx); r = dev->vhost_ops->vhost_set_vring_base(dev, &state); if (r) { - VHOST_OPS_DEBUG("vhost_set_vring_base failed"); - return -errno; + VHOST_OPS_DEBUG(r, "vhost_set_vring_base failed"); + return r; } if (vhost_needs_vring_endian(vdev)) { @@ -1122,7 +1118,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev, virtio_is_big_endian(vdev), vhost_vq_index); if (r) { - return -errno; + return r; } } @@ -1150,15 +1146,13 @@ static int vhost_virtqueue_start(struct vhost_dev *dev, r = vhost_virtqueue_set_addr(dev, vq, vhost_vq_index, dev->log_enabled); if (r < 0) { - r = -errno; goto fail_alloc; } file.fd = event_notifier_get_fd(virtio_queue_get_host_notifier(vvq)); r = dev->vhost_ops->vhost_set_vring_kick(dev, &file); if (r) { - VHOST_OPS_DEBUG("vhost_set_vring_kick failed"); - r = -errno; + VHOST_OPS_DEBUG(r, "vhost_set_vring_kick failed"); goto fail_kick; } @@ -1218,7 +1212,7 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev, r = dev->vhost_ops->vhost_get_vring_base(dev, &state); if (r < 0) { - VHOST_OPS_DEBUG("vhost VQ %u ring restore failed: %d", idx, r); + VHOST_OPS_DEBUG(r, "vhost VQ %u ring restore failed: %d", idx, r); /* Connection to the backend is broken, so let's sync internal * last avail idx to the device used idx. */ @@ -1274,7 +1268,7 @@ static int vhost_virtqueue_set_busyloop_timeout(struct vhost_dev *dev, r = dev->vhost_ops->vhost_set_vring_busyloop_timeout(dev, &state); if (r) { - VHOST_OPS_DEBUG("vhost_set_vring_busyloop_timeout failed"); + VHOST_OPS_DEBUG(r, "vhost_set_vring_busyloop_timeout failed"); return r; } @@ -1296,8 +1290,7 @@ static int vhost_virtqueue_init(struct vhost_dev *dev, file.fd = event_notifier_get_fd(&vq->masked_notifier); r = dev->vhost_ops->vhost_set_vring_call(dev, &file); if (r) { - VHOST_OPS_DEBUG("vhost_set_vring_call failed"); - r = -errno; + VHOST_OPS_DEBUG(r, "vhost_set_vring_call failed"); goto fail_call; } @@ -1557,7 +1550,68 @@ void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n, file.index = hdev->vhost_ops->vhost_get_vq_index(hdev, n); r = hdev->vhost_ops->vhost_set_vring_call(hdev, &file); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_vring_call failed"); + VHOST_OPS_DEBUG(r, "vhost_set_vring_call failed"); + } +} + +bool vhost_config_pending(struct vhost_dev *hdev) +{ + assert(hdev->vhost_ops); + if ((hdev->started == false) || + (hdev->vhost_ops->vhost_set_config_call == NULL)) { + return false; + } + + EventNotifier *notifier = + &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier; + return event_notifier_test_and_clear(notifier); +} + +void vhost_config_mask(struct vhost_dev *hdev, VirtIODevice *vdev, bool mask) +{ + int fd; + int r; + EventNotifier *notifier = + &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier; + EventNotifier *config_notifier = &vdev->config_notifier; + assert(hdev->vhost_ops); + + if ((hdev->started == false) || + (hdev->vhost_ops->vhost_set_config_call == NULL)) { + return; + } + if (mask) { + assert(vdev->use_guest_notifier_mask); + fd = event_notifier_get_fd(notifier); + } else { + fd = event_notifier_get_fd(config_notifier); + } + r = hdev->vhost_ops->vhost_set_config_call(hdev, fd); + if (r < 0) { + VHOST_OPS_DEBUG(r, "vhost_set_config_call failed"); + } +} + +static void vhost_stop_config_intr(struct vhost_dev *dev) +{ + int fd = -1; + assert(dev->vhost_ops); + if (dev->vhost_ops->vhost_set_config_call) { + dev->vhost_ops->vhost_set_config_call(dev, fd); + } +} + +static void vhost_start_config_intr(struct vhost_dev *dev) +{ + int r; + + assert(dev->vhost_ops); + int fd = event_notifier_get_fd(&dev->vdev->config_notifier); + if (dev->vhost_ops->vhost_set_config_call) { + r = dev->vhost_ops->vhost_set_config_call(dev, fd); + if (!r) { + event_notifier_set(&dev->vdev->config_notifier); + } } } @@ -1599,7 +1653,7 @@ int vhost_dev_get_config(struct vhost_dev *hdev, uint8_t *config, } error_setg(errp, "vhost_get_config not implemented"); - return -ENOTSUP; + return -ENOSYS; } int vhost_dev_set_config(struct vhost_dev *hdev, const uint8_t *data, @@ -1612,7 +1666,7 @@ int vhost_dev_set_config(struct vhost_dev *hdev, const uint8_t *data, size, flags); } - return -1; + return -ENOSYS; } void vhost_dev_set_config_notifier(struct vhost_dev *hdev, @@ -1641,7 +1695,7 @@ static int vhost_dev_resize_inflight(struct vhost_inflight *inflight, if (err) { error_report_err(err); - return -1; + return -ENOMEM; } vhost_dev_free_inflight(inflight); @@ -1674,8 +1728,9 @@ int vhost_dev_load_inflight(struct vhost_inflight *inflight, QEMUFile *f) } if (inflight->size != size) { - if (vhost_dev_resize_inflight(inflight, size)) { - return -1; + int ret = vhost_dev_resize_inflight(inflight, size); + if (ret < 0) { + return ret; } } inflight->queue_size = qemu_get_be16(f); @@ -1698,7 +1753,7 @@ int vhost_dev_prepare_inflight(struct vhost_dev *hdev, VirtIODevice *vdev) r = vhost_dev_set_features(hdev, hdev->log_enabled); if (r < 0) { - VHOST_OPS_DEBUG("vhost_dev_prepare_inflight failed"); + VHOST_OPS_DEBUG(r, "vhost_dev_prepare_inflight failed"); return r; } @@ -1713,8 +1768,8 @@ int vhost_dev_set_inflight(struct vhost_dev *dev, if (dev->vhost_ops->vhost_set_inflight_fd && inflight->addr) { r = dev->vhost_ops->vhost_set_inflight_fd(dev, inflight); if (r) { - VHOST_OPS_DEBUG("vhost_set_inflight_fd failed"); - return -errno; + VHOST_OPS_DEBUG(r, "vhost_set_inflight_fd failed"); + return r; } } @@ -1729,8 +1784,8 @@ int vhost_dev_get_inflight(struct vhost_dev *dev, uint16_t queue_size, if (dev->vhost_ops->vhost_get_inflight_fd) { r = dev->vhost_ops->vhost_get_inflight_fd(dev, queue_size, inflight); if (r) { - VHOST_OPS_DEBUG("vhost_get_inflight_fd failed"); - return -errno; + VHOST_OPS_DEBUG(r, "vhost_get_inflight_fd failed"); + return r; } } @@ -1759,8 +1814,7 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) r = hdev->vhost_ops->vhost_set_mem_table(hdev, hdev->mem); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_mem_table failed"); - r = -errno; + VHOST_OPS_DEBUG(r, "vhost_set_mem_table failed"); goto fail_mem; } for (i = 0; i < hdev->nvqs; ++i) { @@ -1773,6 +1827,16 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) } } + r = event_notifier_init( + &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier, 0); + if (r < 0) { + return r; + } + event_notifier_test_and_clear( + &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier); + if (!vdev->use_guest_notifier_mask) { + vhost_config_mask(hdev, vdev, true); + } if (hdev->log_enabled) { uint64_t log_base; @@ -1784,8 +1848,7 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) hdev->log_size ? log_base : 0, hdev->log); if (r < 0) { - VHOST_OPS_DEBUG("vhost_set_log_base failed"); - r = -errno; + VHOST_OPS_DEBUG(r, "vhost_set_log_base failed"); goto fail_log; } } @@ -1806,6 +1869,7 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) vhost_device_iotlb_miss(hdev, vq->used_phys, true); } } + vhost_start_config_intr(hdev); return 0; fail_log: vhost_log_put(hdev, false); @@ -1831,6 +1895,9 @@ void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev) /* should only be called after backend is connected */ assert(hdev->vhost_ops); + event_notifier_test_and_clear( + &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier); + event_notifier_test_and_clear(&vdev->config_notifier); if (hdev->vhost_ops->vhost_dev_start) { hdev->vhost_ops->vhost_dev_start(hdev, false); @@ -1848,6 +1915,7 @@ void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev) } memory_listener_unregister(&hdev->iommu_listener); } + vhost_stop_config_intr(hdev); vhost_log_put(hdev, true); hdev->started = false; hdev->vdev = NULL; @@ -1860,5 +1928,5 @@ int vhost_net_set_backend(struct vhost_dev *hdev, return hdev->vhost_ops->vhost_net_set_backend(hdev, file); } - return -1; + return -ENOSYS; } diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c index 54f9bbb789..1d5192f8b4 100644 --- a/hw/virtio/virtio-crypto.c +++ b/hw/virtio/virtio-crypto.c @@ -948,6 +948,9 @@ static void virtio_crypto_guest_notifier_mask(VirtIODevice *vdev, int idx, assert(vcrypto->vhost_started); + if (idx == VIRTIO_CONFIG_IRQ_IDX) { + return; + } cryptodev_vhost_virtqueue_mask(vdev, queue, idx, mask); } @@ -958,6 +961,9 @@ static bool virtio_crypto_guest_notifier_pending(VirtIODevice *vdev, int idx) assert(vcrypto->vhost_started); + if (idx == VIRTIO_CONFIG_IRQ_IDX) { + return false; + } return cryptodev_vhost_virtqueue_pending(vdev, queue, idx); } diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c index d5a578142b..04c223b0c9 100644 --- a/hw/virtio/virtio-mem.c +++ b/hw/virtio/virtio-mem.c @@ -33,6 +33,14 @@ #include "trace.h" /* + * We only had legacy x86 guests that did not support + * VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE. Other targets don't have legacy guests. + */ +#if defined(TARGET_X86_64) || defined(TARGET_I386) +#define VIRTIO_MEM_HAS_LEGACY_GUESTS +#endif + +/* * Let's not allow blocks smaller than 1 MiB, for example, to keep the tracking * bitmap small. */ @@ -110,6 +118,19 @@ static uint64_t virtio_mem_default_block_size(RAMBlock *rb) return MAX(page_size, VIRTIO_MEM_MIN_BLOCK_SIZE); } +#if defined(VIRTIO_MEM_HAS_LEGACY_GUESTS) +static bool virtio_mem_has_shared_zeropage(RAMBlock *rb) +{ + /* + * We only have a guaranteed shared zeropage on ordinary MAP_PRIVATE + * anonymous RAM. In any other case, reading unplugged *can* populate a + * fresh page, consuming actual memory. + */ + return !qemu_ram_is_shared(rb) && rb->fd < 0 && + qemu_ram_pagesize(rb) == qemu_real_host_page_size; +} +#endif /* VIRTIO_MEM_HAS_LEGACY_GUESTS */ + /* * Size the usable region bigger than the requested size if possible. Esp. * Linux guests will only add (aligned) memory blocks in case they fully @@ -429,10 +450,40 @@ static int virtio_mem_set_block_state(VirtIOMEM *vmem, uint64_t start_gpa, return -EBUSY; } virtio_mem_notify_unplug(vmem, offset, size); - } else if (virtio_mem_notify_plug(vmem, offset, size)) { - /* Could be a mapping attempt resulted in memory getting populated. */ - ram_block_discard_range(vmem->memdev->mr.ram_block, offset, size); - return -EBUSY; + } else { + int ret = 0; + + if (vmem->prealloc) { + void *area = memory_region_get_ram_ptr(&vmem->memdev->mr) + offset; + int fd = memory_region_get_fd(&vmem->memdev->mr); + Error *local_err = NULL; + + os_mem_prealloc(fd, area, size, 1, &local_err); + if (local_err) { + static bool warned; + + /* + * Warn only once, we don't want to fill the log with these + * warnings. + */ + if (!warned) { + warn_report_err(local_err); + warned = true; + } else { + error_free(local_err); + } + ret = -EBUSY; + } + } + if (!ret) { + ret = virtio_mem_notify_plug(vmem, offset, size); + } + + if (ret) { + /* Could be preallocation or a notifier populated memory. */ + ram_block_discard_range(vmem->memdev->mr.ram_block, offset, size); + return -EBUSY; + } } virtio_mem_set_bitmap(vmem, start_gpa, size, plug); return 0; @@ -653,15 +704,29 @@ static uint64_t virtio_mem_get_features(VirtIODevice *vdev, uint64_t features, Error **errp) { MachineState *ms = MACHINE(qdev_get_machine()); + VirtIOMEM *vmem = VIRTIO_MEM(vdev); if (ms->numa_state) { #if defined(CONFIG_ACPI) virtio_add_feature(&features, VIRTIO_MEM_F_ACPI_PXM); #endif } + assert(vmem->unplugged_inaccessible != ON_OFF_AUTO_AUTO); + if (vmem->unplugged_inaccessible == ON_OFF_AUTO_ON) { + virtio_add_feature(&features, VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE); + } return features; } +static int virtio_mem_validate_features(VirtIODevice *vdev) +{ + if (virtio_host_has_feature(vdev, VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE) && + !virtio_vdev_has_feature(vdev, VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE)) { + return -EFAULT; + } + return 0; +} + static void virtio_mem_system_reset(void *opaque) { VirtIOMEM *vmem = VIRTIO_MEM(opaque); @@ -716,6 +781,29 @@ static void virtio_mem_device_realize(DeviceState *dev, Error **errp) rb = vmem->memdev->mr.ram_block; page_size = qemu_ram_pagesize(rb); +#if defined(VIRTIO_MEM_HAS_LEGACY_GUESTS) + switch (vmem->unplugged_inaccessible) { + case ON_OFF_AUTO_AUTO: + if (virtio_mem_has_shared_zeropage(rb)) { + vmem->unplugged_inaccessible = ON_OFF_AUTO_OFF; + } else { + vmem->unplugged_inaccessible = ON_OFF_AUTO_ON; + } + break; + case ON_OFF_AUTO_OFF: + if (!virtio_mem_has_shared_zeropage(rb)) { + warn_report("'%s' property set to 'off' with a memdev that does" + " not support the shared zeropage.", + VIRTIO_MEM_UNPLUGGED_INACCESSIBLE_PROP); + } + break; + default: + break; + } +#else /* VIRTIO_MEM_HAS_LEGACY_GUESTS */ + vmem->unplugged_inaccessible = ON_OFF_AUTO_ON; +#endif /* VIRTIO_MEM_HAS_LEGACY_GUESTS */ + /* * If the block size wasn't configured by the user, use a sane default. This * allows using hugetlbfs backends of any page size without manual @@ -733,7 +821,8 @@ static void virtio_mem_device_realize(DeviceState *dev, Error **errp) warn_report("'%s' property is smaller than the default block size (%" PRIx64 " MiB)", VIRTIO_MEM_BLOCK_SIZE_PROP, virtio_mem_default_block_size(rb) / MiB); - } else if (!QEMU_IS_ALIGNED(vmem->requested_size, vmem->block_size)) { + } + if (!QEMU_IS_ALIGNED(vmem->requested_size, vmem->block_size)) { error_setg(errp, "'%s' property has to be multiples of '%s' (0x%" PRIx64 ")", VIRTIO_MEM_REQUESTED_SIZE_PROP, VIRTIO_MEM_BLOCK_SIZE_PROP, vmem->block_size); @@ -1107,8 +1196,13 @@ static void virtio_mem_instance_init(Object *obj) static Property virtio_mem_properties[] = { DEFINE_PROP_UINT64(VIRTIO_MEM_ADDR_PROP, VirtIOMEM, addr, 0), DEFINE_PROP_UINT32(VIRTIO_MEM_NODE_PROP, VirtIOMEM, node, 0), + DEFINE_PROP_BOOL(VIRTIO_MEM_PREALLOC_PROP, VirtIOMEM, prealloc, false), DEFINE_PROP_LINK(VIRTIO_MEM_MEMDEV_PROP, VirtIOMEM, memdev, TYPE_MEMORY_BACKEND, HostMemoryBackend *), +#if defined(VIRTIO_MEM_HAS_LEGACY_GUESTS) + DEFINE_PROP_ON_OFF_AUTO(VIRTIO_MEM_UNPLUGGED_INACCESSIBLE_PROP, VirtIOMEM, + unplugged_inaccessible, ON_OFF_AUTO_AUTO), +#endif DEFINE_PROP_END_OF_LIST(), }; @@ -1247,6 +1341,7 @@ static void virtio_mem_class_init(ObjectClass *klass, void *data) vdc->unrealize = virtio_mem_device_unrealize; vdc->get_config = virtio_mem_get_config; vdc->get_features = virtio_mem_get_features; + vdc->validate_features = virtio_mem_validate_features; vdc->vmsd = &vmstate_virtio_mem_device; vmc->fill_device_info = virtio_mem_fill_device_info; diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index 72da12fea5..809132018b 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -673,7 +673,30 @@ static int virtio_mmio_set_guest_notifier(DeviceState *d, int n, bool assign, return 0; } +static int virtio_mmio_set_config_guest_notifier(DeviceState *d, bool assign) +{ + VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d); + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); + bool with_irqfd = false; + EventNotifier *notifier = virtio_config_get_guest_notifier(vdev); + int r = 0; + if (assign) { + r = event_notifier_init(notifier, 0); + if (r < 0) { + return r; + } + virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd); + } else { + virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd); + event_notifier_cleanup(notifier); + } + if (vdc->guest_notifier_mask && vdev->use_guest_notifier_mask) { + vdc->guest_notifier_mask(vdev, VIRTIO_CONFIG_IRQ_IDX, !assign); + } + return r; +} static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) { @@ -695,6 +718,10 @@ static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs, goto assign_error; } } + r = virtio_mmio_set_config_guest_notifier(d, assign); + if (r < 0) { + goto assign_error; + } return 0; diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 750aa47ec1..98fb5493ae 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -677,7 +677,6 @@ static uint32_t virtio_read_config(PCIDevice *pci_dev, } static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, - unsigned int queue_no, unsigned int vector) { VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; @@ -704,112 +703,160 @@ static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, } static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, - unsigned int queue_no, + EventNotifier *n, unsigned int vector) { VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; - VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); - VirtQueue *vq = virtio_get_queue(vdev, queue_no); - EventNotifier *n = virtio_queue_get_guest_notifier(vq); return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq); } static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, - unsigned int queue_no, + EventNotifier *n , unsigned int vector) { - VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); - VirtQueue *vq = virtio_get_queue(vdev, queue_no); - EventNotifier *n = virtio_queue_get_guest_notifier(vq); VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; int ret; ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq); assert(ret == 0); } +static int virtio_pci_get_notifier(VirtIOPCIProxy *proxy, int queue_no, + EventNotifier **n, unsigned int *vector) +{ + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + VirtQueue *vq; -static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) + if (queue_no == VIRTIO_CONFIG_IRQ_IDX) { + *n = virtio_config_get_guest_notifier(vdev); + *vector = vdev->config_vector; + } else { + if (!virtio_queue_get_num(vdev, queue_no)) { + return -1; + } + *vector = virtio_queue_vector(vdev, queue_no); + vq = virtio_get_queue(vdev, queue_no); + *n = virtio_queue_get_guest_notifier(vq); + } + return 0; +} + +static int kvm_virtio_pci_vector_use_one(VirtIOPCIProxy *proxy, int queue_no) { + unsigned int vector; + int ret; + EventNotifier *n; PCIDevice *dev = &proxy->pci_dev; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); - unsigned int vector; - int ret, queue_no; - for (queue_no = 0; queue_no < nvqs; queue_no++) { - if (!virtio_queue_get_num(vdev, queue_no)) { - break; - } - vector = virtio_queue_vector(vdev, queue_no); - if (vector >= msix_nr_vectors_allocated(dev)) { - continue; - } - ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector); + ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector); + if (ret < 0) { + return ret; + } + if (vector >= msix_nr_vectors_allocated(dev)) { + return 0; + } + ret = kvm_virtio_pci_vq_vector_use(proxy, vector); + if (ret < 0) { + goto undo; + } + /* + * If guest supports masking, set up irqfd now. + * Otherwise, delay until unmasked in the frontend. + */ + if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { + ret = kvm_virtio_pci_irqfd_use(proxy, n, vector); if (ret < 0) { + kvm_virtio_pci_vq_vector_release(proxy, vector); goto undo; } - /* If guest supports masking, set up irqfd now. - * Otherwise, delay until unmasked in the frontend. - */ - if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { - ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); - if (ret < 0) { - kvm_virtio_pci_vq_vector_release(proxy, vector); - goto undo; - } - } } - return 0; + return 0; undo: - while (--queue_no >= 0) { - vector = virtio_queue_vector(vdev, queue_no); - if (vector >= msix_nr_vectors_allocated(dev)) { - continue; + + vector = virtio_queue_vector(vdev, queue_no); + if (vector >= msix_nr_vectors_allocated(dev)) { + return ret; + } + if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { + ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector); + if (ret < 0) { + return ret; } - if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { - kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); + kvm_virtio_pci_irqfd_release(proxy, n, vector); + } + return ret; +} +static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) +{ + int queue_no; + int ret = 0; + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + + for (queue_no = 0; queue_no < nvqs; queue_no++) { + if (!virtio_queue_get_num(vdev, queue_no)) { + return -1; } - kvm_virtio_pci_vq_vector_release(proxy, vector); + ret = kvm_virtio_pci_vector_use_one(proxy, queue_no); } return ret; } -static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) +static int kvm_virtio_pci_vector_config_use(VirtIOPCIProxy *proxy) +{ + return kvm_virtio_pci_vector_use_one(proxy, VIRTIO_CONFIG_IRQ_IDX); +} + +static void kvm_virtio_pci_vector_release_one(VirtIOPCIProxy *proxy, + int queue_no) { - PCIDevice *dev = &proxy->pci_dev; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); unsigned int vector; - int queue_no; + EventNotifier *n; + int ret; VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); + PCIDevice *dev = &proxy->pci_dev; + + ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector); + if (ret < 0) { + return; + } + if (vector >= msix_nr_vectors_allocated(dev)) { + return; + } + if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { + kvm_virtio_pci_irqfd_release(proxy, n, vector); + } + kvm_virtio_pci_vq_vector_release(proxy, vector); +} + +static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) +{ + int queue_no; + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); for (queue_no = 0; queue_no < nvqs; queue_no++) { if (!virtio_queue_get_num(vdev, queue_no)) { break; } - vector = virtio_queue_vector(vdev, queue_no); - if (vector >= msix_nr_vectors_allocated(dev)) { - continue; - } - /* If guest supports masking, clean up irqfd now. - * Otherwise, it was cleaned when masked in the frontend. - */ - if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { - kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); - } - kvm_virtio_pci_vq_vector_release(proxy, vector); + kvm_virtio_pci_vector_release_one(proxy, queue_no); } } -static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, +static void kvm_virtio_pci_vector_config_release(VirtIOPCIProxy *proxy) +{ + kvm_virtio_pci_vector_release_one(proxy, VIRTIO_CONFIG_IRQ_IDX); +} + +static int virtio_pci_one_vector_unmask(VirtIOPCIProxy *proxy, unsigned int queue_no, unsigned int vector, - MSIMessage msg) + MSIMessage msg, + EventNotifier *n) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); - VirtQueue *vq = virtio_get_queue(vdev, queue_no); - EventNotifier *n = virtio_queue_get_guest_notifier(vq); VirtIOIRQFD *irqfd; int ret = 0; @@ -836,14 +883,15 @@ static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, event_notifier_set(n); } } else { - ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); + ret = kvm_virtio_pci_irqfd_use(proxy, n, vector); } return ret; } -static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, +static void virtio_pci_one_vector_mask(VirtIOPCIProxy *proxy, unsigned int queue_no, - unsigned int vector) + unsigned int vector, + EventNotifier *n) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); @@ -854,7 +902,7 @@ static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { k->guest_notifier_mask(vdev, queue_no, true); } else { - kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); + kvm_virtio_pci_irqfd_release(proxy, n, vector); } } @@ -864,6 +912,7 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_vector_first_queue(vdev, vector); + EventNotifier *n; int ret, index, unmasked = 0; while (vq) { @@ -872,7 +921,8 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, break; } if (index < proxy->nvqs_with_notifiers) { - ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg); + n = virtio_queue_get_guest_notifier(vq); + ret = virtio_pci_one_vector_unmask(proxy, index, vector, msg, n); if (ret < 0) { goto undo; } @@ -880,15 +930,24 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, } vq = virtio_vector_next_queue(vq); } - + /* unmask config intr */ + n = virtio_config_get_guest_notifier(vdev); + ret = virtio_pci_one_vector_unmask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, + msg, n); + if (ret < 0) { + goto undo_config; + } return 0; - +undo_config: + n = virtio_config_get_guest_notifier(vdev); + virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n); undo: vq = virtio_vector_first_queue(vdev, vector); while (vq && unmasked >= 0) { index = virtio_get_queue_index(vq); if (index < proxy->nvqs_with_notifiers) { - virtio_pci_vq_vector_mask(proxy, index, vector); + n = virtio_queue_get_guest_notifier(vq); + virtio_pci_one_vector_mask(proxy, index, vector, n); --unmasked; } vq = virtio_vector_next_queue(vq); @@ -901,18 +960,22 @@ static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_vector_first_queue(vdev, vector); + EventNotifier *n; int index; while (vq) { index = virtio_get_queue_index(vq); + n = virtio_queue_get_guest_notifier(vq); if (!virtio_queue_get_num(vdev, index)) { break; } if (index < proxy->nvqs_with_notifiers) { - virtio_pci_vq_vector_mask(proxy, index, vector); + virtio_pci_one_vector_mask(proxy, index, vector, n); } vq = virtio_vector_next_queue(vq); } + n = virtio_config_get_guest_notifier(vdev); + virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n); } static void virtio_pci_vector_poll(PCIDevice *dev, @@ -925,19 +988,17 @@ static void virtio_pci_vector_poll(PCIDevice *dev, int queue_no; unsigned int vector; EventNotifier *notifier; - VirtQueue *vq; + int ret; for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { - if (!virtio_queue_get_num(vdev, queue_no)) { + ret = virtio_pci_get_notifier(proxy, queue_no, ¬ifier, &vector); + if (ret < 0) { break; } - vector = virtio_queue_vector(vdev, queue_no); if (vector < vector_start || vector >= vector_end || !msix_is_masked(dev, vector)) { continue; } - vq = virtio_get_queue(vdev, queue_no); - notifier = virtio_queue_get_guest_notifier(vq); if (k->guest_notifier_pending) { if (k->guest_notifier_pending(vdev, queue_no)) { msix_set_pending(dev, vector); @@ -946,6 +1007,34 @@ static void virtio_pci_vector_poll(PCIDevice *dev, msix_set_pending(dev, vector); } } + /* poll the config intr */ + ret = virtio_pci_get_notifier(proxy, VIRTIO_CONFIG_IRQ_IDX, ¬ifier, + &vector); + if (ret < 0) { + return; + } + if (vector < vector_start || vector >= vector_end || + !msix_is_masked(dev, vector)) { + return; + } + if (k->guest_notifier_pending) { + if (k->guest_notifier_pending(vdev, VIRTIO_CONFIG_IRQ_IDX)) { + msix_set_pending(dev, vector); + } + } else if (event_notifier_test_and_clear(notifier)) { + msix_set_pending(dev, vector); + } +} + +void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue *vq, + int n, bool assign, + bool with_irqfd) +{ + if (n == VIRTIO_CONFIG_IRQ_IDX) { + virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd); + } else { + virtio_queue_set_guest_notifier_fd_handler(vq, assign, with_irqfd); + } } static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, @@ -954,17 +1043,25 @@ static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); - VirtQueue *vq = virtio_get_queue(vdev, n); - EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); + VirtQueue *vq = NULL; + EventNotifier *notifier = NULL; + + if (n == VIRTIO_CONFIG_IRQ_IDX) { + notifier = virtio_config_get_guest_notifier(vdev); + } else { + vq = virtio_get_queue(vdev, n); + notifier = virtio_queue_get_guest_notifier(vq); + } if (assign) { int r = event_notifier_init(notifier, 0); if (r < 0) { return r; } - virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); + virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, true, with_irqfd); } else { - virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); + virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, false, + with_irqfd); event_notifier_cleanup(notifier); } @@ -1006,6 +1103,7 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) msix_unset_vector_notifiers(&proxy->pci_dev); if (proxy->vector_irqfd) { kvm_virtio_pci_vector_release(proxy, nvqs); + kvm_virtio_pci_vector_config_release(proxy); g_free(proxy->vector_irqfd); proxy->vector_irqfd = NULL; } @@ -1021,7 +1119,11 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) goto assign_error; } } - + r = virtio_pci_set_guest_notifier(d, VIRTIO_CONFIG_IRQ_IDX, assign, + with_irqfd); + if (r < 0) { + goto config_assign_error; + } /* Must set vector notifier after guest notifier has been assigned */ if ((with_irqfd || k->guest_notifier_mask) && assign) { if (with_irqfd) { @@ -1030,11 +1132,14 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) msix_nr_vectors_allocated(&proxy->pci_dev)); r = kvm_virtio_pci_vector_use(proxy, nvqs); if (r < 0) { - goto assign_error; + goto config_assign_error; } } - r = msix_set_vector_notifiers(&proxy->pci_dev, - virtio_pci_vector_unmask, + r = kvm_virtio_pci_vector_config_use(proxy); + if (r < 0) { + goto config_error; + } + r = msix_set_vector_notifiers(&proxy->pci_dev, virtio_pci_vector_unmask, virtio_pci_vector_mask, virtio_pci_vector_poll); if (r < 0) { @@ -1049,7 +1154,11 @@ notifiers_error: assert(assign); kvm_virtio_pci_vector_release(proxy, nvqs); } - +config_error: + kvm_virtio_pci_vector_config_release(proxy); +config_assign_error: + virtio_pci_set_guest_notifier(d, VIRTIO_CONFIG_IRQ_IDX, !assign, + with_irqfd); assign_error: /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ assert(assign); diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index 2446dcd9ae..b704acc5a8 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -251,5 +251,7 @@ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t); * @fixed_queues. */ unsigned virtio_pci_optimal_num_queues(unsigned fixed_queues); - +void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue *vq, + int n, bool assign, + bool with_irqfd); #endif diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index e11a8a0dba..971e59a663 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -885,6 +885,7 @@ static void virtqueue_packed_flush(VirtQueue *vq, unsigned int count) if (vq->used_idx >= vq->vring.num) { vq->used_idx -= vq->vring.num; vq->used_wrap_counter ^= 1; + vq->signalled_used_valid = false; } } @@ -3493,7 +3494,14 @@ static void virtio_queue_guest_notifier_read(EventNotifier *n) virtio_irq(vq); } } +static void virtio_config_guest_notifier_read(EventNotifier *n) +{ + VirtIODevice *vdev = container_of(n, VirtIODevice, config_notifier); + if (event_notifier_test_and_clear(n)) { + virtio_notify_config(vdev); + } +} void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, bool with_irqfd) { @@ -3510,6 +3518,23 @@ void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, } } +void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev, + bool assign, bool with_irqfd) +{ + EventNotifier *n; + n = &vdev->config_notifier; + if (assign && !with_irqfd) { + event_notifier_set_handler(n, virtio_config_guest_notifier_read); + } else { + event_notifier_set_handler(n, NULL); + } + if (!assign) { + /* Test and clear notifier before closing it,*/ + /* in case poll callback didn't have time to run. */ + virtio_config_guest_notifier_read(n); + } +} + EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq) { return &vq->guest_notifier; @@ -3583,6 +3608,11 @@ EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq) return &vq->host_notifier; } +EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev) +{ + return &vdev->config_notifier; +} + void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled) { vq->host_notifier_enabled = enabled; |