[PATCH 5/9] vhost: add ASID support to VDUSE IOTLB operations
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From: Eugenio Pérez <eperezma@redhat.com>
Date: 2026-09-24 10:15:45
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
Revision v1 of 3 in this series.
Revisions (3)
- v1 current
- v2 [diff vs current]
- v3 [diff vs current]
From: Maxime Coquelin <redacted> Make use of the newly introduced address space ID when calling Vhost IOTLB API. Signed-off-by: Maxime Coquelin <redacted> Signed-off-by: Eugenio Pérez <eperezma@redhat.com> --- lib/vhost/vduse.c | 39 +++++++++++++++++++++++++++++++++------ 1 file changed, 33 insertions(+), 6 deletions(-)
diff --git a/lib/vhost/vduse.c b/lib/vhost/vduse.c
index 22256fdc6700..bd1ff8a42f57 100644
--- a/lib/vhost/vduse.c
+++ b/lib/vhost/vduse.c@@ -71,7 +71,7 @@ vduse_iotlb_remove_notify(uint64_t addr, uint64_t offset, uint64_t size) static int vduse_iotlb_miss(struct virtio_net *dev, int asid, uint64_t iova, uint8_t perm __rte_unused) { - struct vduse_iotlb_entry entry; + struct vduse_iotlb_entry_v2 entry = {}; uint64_t size, page_size; struct stat stat; void *mmap_addr;
@@ -79,8 +79,13 @@ vduse_iotlb_miss(struct virtio_net *dev, int asid, uint64_t iova, uint8_t perm _ entry.start = iova; entry.last = iova + 1; + entry.asid = asid; - ret = ioctl(dev->vduse_dev_fd, VDUSE_IOTLB_GET_FD, &entry); + if (dev->vduse_api_ver < 1) { + ret = ioctl(dev->vduse_dev_fd, VDUSE_IOTLB_GET_FD, &entry); + } else { + ret = ioctl(dev->vduse_dev_fd, VDUSE_IOTLB_GET_FD2, &entry); + } if (ret < 0) { VHOST_CONFIG_LOG(dev->ifname, ERR, "Failed to get IOTLB entry for 0x%" PRIx64, iova);
@@ -90,6 +95,7 @@ vduse_iotlb_miss(struct virtio_net *dev, int asid, uint64_t iova, uint8_t perm _ fd = ret; VHOST_CONFIG_LOG(dev->ifname, DEBUG, "New IOTLB entry:"); + VHOST_CONFIG_LOG(dev->ifname, DEBUG, "\tASID: %d", entry.asid); VHOST_CONFIG_LOG(dev->ifname, DEBUG, "\tIOVA: %" PRIx64 " - %" PRIx64, (uint64_t)entry.start, (uint64_t)entry.last); VHOST_CONFIG_LOG(dev->ifname, DEBUG, "\toffset: %" PRIx64, (uint64_t)entry.offset);
@@ -458,10 +464,31 @@ vduse_events_handler(int fd, void *arg, int *close __rte_unused) resp.result = VDUSE_REQ_RESULT_OK; break; case VDUSE_UPDATE_IOTLB: - VHOST_CONFIG_LOG(dev->ifname, INFO, "\tIOVA range: %" PRIx64 " - %" PRIx64, - (uint64_t)req.iova.start, (uint64_t)req.iova.last); - vhost_user_iotlb_cache_remove(dev, 0, req.iova.start, - req.iova.last - req.iova.start + 1); + { + uint64_t start, last; + uint32_t asid; + + if (dev->vduse_api_ver < 1) { + start = req.iova.start; + last = req.iova.last; + asid = 0; + } else { + start = req.iova_v2.start; + last = req.iova_v2.last; + asid = req.iova_v2.asid; + } + + if (asid >= RTE_DIM(dev->iotlb)) { + VHOST_CONFIG_LOG(dev->ifname, ERR, + "Invalid ASID %u in IOTLB update", asid); + resp.result = VDUSE_REQ_RESULT_FAILED; + break; + } + + VHOST_CONFIG_LOG(dev->ifname, INFO, "\t(ASID %d) IOVA range: %" PRIx64 " - %" PRIx64, + asid, start, last); + vhost_user_iotlb_cache_remove(dev, asid, start, last - start + 1); + } resp.result = VDUSE_REQ_RESULT_OK; break; case VDUSE_SET_VQ_GROUP_ASID:
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2.55.0