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Tsirkin " Cc: Cindy Lu , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Yongji Xie , Stefano Garzarella , virtualization@lists.linux.dev, Laurent Vivier , linux-kernel@vger.kernel.org, Xuan Zhuo , jasowang@redhat.com, Maxime Coquelin Subject: [RFC v2 5/7] vduse: add vq group asid support Date: Thu, 7 Aug 2025 13:57:50 +0200 Message-ID: <20250807115752.1663383-6-eperezma@redhat.com> In-Reply-To: <20250807115752.1663383-1-eperezma@redhat.com> References: <20250807115752.1663383-1-eperezma@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Add support for assigning Address Space Identifiers (ASIDs) to each VQ group. This enables mapping each group into a distinct memory space. Signed-off-by: Eugenio P=C3=A9rez --- v2: Make iotlb entry the last one of vduse_iotlb_entry_v2 so the first part of the struct is the same. --- drivers/vdpa/vdpa_user/vduse_dev.c | 259 ++++++++++++++++++++++------- include/uapi/linux/vduse.h | 36 +++- 2 files changed, 230 insertions(+), 65 deletions(-) diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vd= use_dev.c index a7a2749f5818..145147c49930 100644 --- a/drivers/vdpa/vdpa_user/vduse_dev.c +++ b/drivers/vdpa/vdpa_user/vduse_dev.c @@ -51,6 +51,12 @@ */ #define VDUSE_MAX_VQ_GROUPS 3 =20 +/* + * We can do ASID thanks to (ab)using the vduse device and the vdpa one. S= o no + * more than 2. + */ +#define VDUSE_MAX_ASID 2 + #define IRQ_UNBOUND -1 =20 struct vduse_virtqueue { @@ -91,6 +97,7 @@ struct vduse_umem { }; =20 struct vduse_vq_group_int { + struct vduse_iova_domain *domain; struct vduse_dev *dev; }; =20 @@ -98,7 +105,7 @@ struct vduse_dev { struct vduse_vdpa *vdev; struct device *dev; struct vduse_virtqueue **vqs; - struct vduse_iova_domain *domain; + struct vduse_iova_domain *domain[VDUSE_MAX_ASID]; char *name; struct mutex lock; spinlock_t msg_lock; @@ -126,7 +133,8 @@ struct vduse_dev { u32 vq_num; u32 vq_align; u32 ngroups; - struct vduse_umem *umem; + u32 nas; + struct vduse_umem *umem[VDUSE_MAX_ASID]; struct vduse_vq_group_int groups[VDUSE_MAX_VQ_GROUPS]; struct mutex mem_lock; unsigned int bounce_size; @@ -440,14 +448,28 @@ static __poll_t vduse_dev_poll(struct file *file, pol= l_table *wait) return mask; } =20 +/* Force set the asid to a vq group without a message to the VDUSE device = */ +static void vduse_set_group_asid_nomsg(struct vduse_dev *dev, + unsigned int group, unsigned int asid) +{ + guard(mutex)(&dev->domain_lock); + dev->groups[group].domain =3D dev->domain[asid]; +} + static void vduse_dev_reset(struct vduse_dev *dev) { int i; - struct vduse_iova_domain *domain =3D dev->domain; =20 /* The coherent mappings are handled in vduse_dev_free_coherent() */ - if (domain && domain->bounce_map) - vduse_domain_reset_bounce_map(domain); + for (i =3D 0; i < dev->nas; i++) { + struct vduse_iova_domain *domain =3D dev->domain[i]; + + if (domain && domain->bounce_map) + vduse_domain_reset_bounce_map(domain); + } + + for (i =3D 0; i < dev->ngroups; i++) + vduse_set_group_asid_nomsg(dev, i, 0); =20 down_write(&dev->rwsem); =20 @@ -619,6 +641,29 @@ static u32 vduse_get_vq_desc_group(struct vdpa_device = *vdpa, u16 idx) return dev->vqs[idx]->vq_desc_group; } =20 +static int vduse_set_group_asid(struct vdpa_device *vdpa, unsigned int gro= up, + unsigned int asid) +{ + struct vduse_dev *dev =3D vdpa_to_vduse(vdpa); + struct vduse_dev_msg msg =3D { 0 }; + int r; + + if (dev->api_version < VDUSE_API_VERSION_1 || + group > dev->ngroups || asid > dev->nas) + return -EINVAL; + + msg.req.type =3D VDUSE_SET_VQ_GROUP_ASID; + msg.req.vq_group_asid.group =3D group; + msg.req.vq_group_asid.asid =3D asid; + + r =3D vduse_dev_msg_sync(dev, &msg); + if (r < 0) + return r; + + vduse_set_group_asid_nomsg(dev, group, asid); + return 0; +} + static void *vduse_get_vq_map_token(struct vdpa_device *vdpa, u16 idx) { struct vduse_dev *dev =3D vdpa_to_vduse(vdpa); @@ -833,13 +878,13 @@ static int vduse_vdpa_set_map(struct vdpa_device *vdp= a, struct vduse_dev *dev =3D vdpa_to_vduse(vdpa); int ret; =20 - ret =3D vduse_domain_set_map(dev->domain, iotlb); + ret =3D vduse_domain_set_map(dev->domain[asid], iotlb); if (ret) return ret; =20 ret =3D vduse_dev_update_iotlb(dev, 0ULL, ULLONG_MAX); if (ret) { - vduse_domain_clear_map(dev->domain, iotlb); + vduse_domain_clear_map(dev->domain[asid], iotlb); return ret; } =20 @@ -883,6 +928,7 @@ static const struct vdpa_config_ops vduse_vdpa_config_o= ps =3D { .get_vq_affinity =3D vduse_vdpa_get_vq_affinity, .reset =3D vduse_vdpa_reset, .set_map =3D vduse_vdpa_set_map, + .set_group_asid =3D vduse_set_group_asid, .get_vq_map_token =3D vduse_get_vq_map_token, .free =3D vduse_vdpa_free, }; @@ -893,8 +939,10 @@ static void vduse_dev_sync_single_for_device(void *tok= en, { struct vduse_vq_group_int *group =3D token; struct vduse_dev *vdev =3D group->dev; - struct vduse_iova_domain *domain =3D vdev->domain; + struct vduse_iova_domain *domain; =20 + guard(mutex)(&vdev->domain_lock); + domain =3D group->domain; vduse_domain_sync_single_for_device(domain, dma_addr, size, dir); } =20 @@ -904,8 +952,10 @@ static void vduse_dev_sync_single_for_cpu(void *token, { struct vduse_vq_group_int *group =3D token; struct vduse_dev *vdev =3D group->dev; - struct vduse_iova_domain *domain =3D vdev->domain; + struct vduse_iova_domain *domain; =20 + guard(mutex)(&vdev->domain_lock); + domain =3D group->domain; vduse_domain_sync_single_for_cpu(domain, dma_addr, size, dir); } =20 @@ -916,8 +966,10 @@ static dma_addr_t vduse_dev_map_page(void *token, stru= ct page *page, { struct vduse_vq_group_int *group =3D token; struct vduse_dev *vdev =3D group->dev; - struct vduse_iova_domain *domain =3D vdev->domain; + struct vduse_iova_domain *domain; =20 + guard(mutex)(&vdev->domain_lock); + domain =3D group->domain; return vduse_domain_map_page(domain, page, offset, size, dir, attrs); } =20 @@ -927,8 +979,10 @@ static void vduse_dev_unmap_page(void *token, dma_addr= _t dma_addr, { struct vduse_vq_group_int *group =3D token; struct vduse_dev *vdev =3D group->dev; - struct vduse_iova_domain *domain =3D vdev->domain; + struct vduse_iova_domain *domain; =20 + guard(mutex)(&vdev->domain_lock); + domain =3D group->domain; return vduse_domain_unmap_page(domain, dma_addr, size, dir, attrs); } =20 @@ -937,11 +991,13 @@ static void *vduse_dev_alloc_coherent(void *token, si= ze_t size, { struct vduse_vq_group_int *group =3D token; struct vduse_dev *vdev =3D group->dev; - struct vduse_iova_domain *domain =3D vdev->domain; + struct vduse_iova_domain *domain; unsigned long iova; void *addr; =20 *dma_addr =3D DMA_MAPPING_ERROR; + guard(mutex)(&vdev->domain_lock); + domain =3D group->domain; addr =3D vduse_domain_alloc_coherent(domain, size, (dma_addr_t *)&iova, flag); if (!addr) @@ -958,8 +1014,10 @@ static void vduse_dev_free_coherent(void *token, size= _t size, { struct vduse_vq_group_int *group =3D token; struct vduse_dev *vdev =3D group->dev; - struct vduse_iova_domain *domain =3D vdev->domain; + struct vduse_iova_domain *domain; =20 + guard(mutex)(&vdev->domain_lock); + domain =3D group->domain; vduse_domain_free_coherent(domain, size, vaddr, dma_addr, attrs); } =20 @@ -967,8 +1025,10 @@ static size_t vduse_dev_max_mapping_size(void *token) { struct vduse_vq_group_int *group =3D token; struct vduse_dev *vdev =3D group->dev; - struct vduse_iova_domain *domain =3D vdev->domain; + struct vduse_iova_domain *domain; =20 + guard(mutex)(&vdev->domain_lock); + domain =3D group->domain; return domain->bounce_size; } =20 @@ -1107,31 +1167,32 @@ static int vduse_dev_queue_irq_work(struct vduse_de= v *dev, return ret; } =20 -static int vduse_dev_dereg_umem(struct vduse_dev *dev, +static int vduse_dev_dereg_umem(struct vduse_dev *dev, u32 asid, u64 iova, u64 size) { int ret; =20 mutex_lock(&dev->mem_lock); ret =3D -ENOENT; - if (!dev->umem) + if (!dev->umem[asid]) goto unlock; =20 ret =3D -EINVAL; - if (!dev->domain) + if (!dev->domain[asid]) goto unlock; =20 - if (dev->umem->iova !=3D iova || size !=3D dev->domain->bounce_size) + if (dev->umem[asid]->iova !=3D iova || + size !=3D dev->domain[asid]->bounce_size) goto unlock; =20 - vduse_domain_remove_user_bounce_pages(dev->domain); - unpin_user_pages_dirty_lock(dev->umem->pages, - dev->umem->npages, true); - atomic64_sub(dev->umem->npages, &dev->umem->mm->pinned_vm); - mmdrop(dev->umem->mm); - vfree(dev->umem->pages); - kfree(dev->umem); - dev->umem =3D NULL; + vduse_domain_remove_user_bounce_pages(dev->domain[asid]); + unpin_user_pages_dirty_lock(dev->umem[asid]->pages, + dev->umem[asid]->npages, true); + atomic64_sub(dev->umem[asid]->npages, &dev->umem[asid]->mm->pinned_vm); + mmdrop(dev->umem[asid]->mm); + vfree(dev->umem[asid]->pages); + kfree(dev->umem[asid]); + dev->umem[asid] =3D NULL; ret =3D 0; unlock: mutex_unlock(&dev->mem_lock); @@ -1139,7 +1200,7 @@ static int vduse_dev_dereg_umem(struct vduse_dev *dev, } =20 static int vduse_dev_reg_umem(struct vduse_dev *dev, - u64 iova, u64 uaddr, u64 size) + u32 asid, u64 iova, u64 uaddr, u64 size) { struct page **page_list =3D NULL; struct vduse_umem *umem =3D NULL; @@ -1147,14 +1208,14 @@ static int vduse_dev_reg_umem(struct vduse_dev *dev, unsigned long npages, lock_limit; int ret; =20 - if (!dev->domain || !dev->domain->bounce_map || - size !=3D dev->domain->bounce_size || + if (!dev->domain[asid] || !dev->domain[asid]->bounce_map || + size !=3D dev->domain[asid]->bounce_size || iova !=3D 0 || uaddr & ~PAGE_MASK) return -EINVAL; =20 mutex_lock(&dev->mem_lock); ret =3D -EEXIST; - if (dev->umem) + if (dev->umem[asid]) goto unlock; =20 ret =3D -ENOMEM; @@ -1178,7 +1239,7 @@ static int vduse_dev_reg_umem(struct vduse_dev *dev, goto out; } =20 - ret =3D vduse_domain_add_user_bounce_pages(dev->domain, + ret =3D vduse_domain_add_user_bounce_pages(dev->domain[asid], page_list, pinned); if (ret) goto out; @@ -1191,7 +1252,7 @@ static int vduse_dev_reg_umem(struct vduse_dev *dev, umem->mm =3D current->mm; mmgrab(current->mm); =20 - dev->umem =3D umem; + dev->umem[asid] =3D umem; out: if (ret && pinned > 0) unpin_user_pages(page_list, pinned); @@ -1234,26 +1295,43 @@ static long vduse_dev_ioctl(struct file *file, unsi= gned int cmd, =20 switch (cmd) { case VDUSE_IOTLB_GET_FD: { - struct vduse_iotlb_entry entry; + struct vduse_iotlb_entry_v2 entry; + struct vduse_iotlb_entry entry_old; struct vhost_iotlb_map *map; struct vdpa_map_file *map_file; struct file *f =3D NULL; =20 ret =3D -EFAULT; - if (copy_from_user(&entry, argp, sizeof(entry))) - break; + if (dev->api_version >=3D VDUSE_API_VERSION_1) { + if (copy_from_user(&entry, argp, sizeof(entry))) + break; + } else { + if (copy_from_user(&entry_old, argp, + sizeof(entry_old))) + break; + + entry.offset =3D entry_old.offset; + entry.start =3D entry_old.start; + entry.last =3D entry_old.last; + entry.asid =3D 0; + entry.perm =3D entry_old.perm; + } =20 ret =3D -EINVAL; if (entry.start > entry.last) break; =20 + if (entry.asid > dev->nas) + break; + mutex_lock(&dev->domain_lock); - if (!dev->domain) { + /* TODO accessing an array with idx from userspace, mitigations? */ + if (!dev->domain[entry.asid]) { mutex_unlock(&dev->domain_lock); break; } - spin_lock(&dev->domain->iotlb_lock); - map =3D vhost_iotlb_itree_first(dev->domain->iotlb, + spin_lock(&dev->domain[entry.asid]->iotlb_lock); + map =3D vhost_iotlb_itree_first(dev->domain[entry.asid]->iotlb, entry.start, entry.last); if (map) { map_file =3D (struct vdpa_map_file *)map->opaque; @@ -1263,7 +1341,7 @@ static long vduse_dev_ioctl(struct file *file, unsign= ed int cmd, entry.last =3D map->last; entry.perm =3D map->perm; } - spin_unlock(&dev->domain->iotlb_lock); + spin_unlock(&dev->domain[entry.asid]->iotlb_lock); mutex_unlock(&dev->domain_lock); ret =3D -EINVAL; if (!f) @@ -1413,12 +1491,16 @@ static long vduse_dev_ioctl(struct file *file, unsi= gned int cmd, break; =20 ret =3D -EINVAL; + /* TODO: Using asid from userspace, need to mitigate? */ if (!is_mem_zero((const char *)umem.reserved, - sizeof(umem.reserved))) + sizeof(umem.reserved)) || + (dev->api_version < VDUSE_API_VERSION_1 && + umem.asid !=3D 0) || + umem.asid > dev->nas) break; =20 mutex_lock(&dev->domain_lock); - ret =3D vduse_dev_reg_umem(dev, umem.iova, + ret =3D vduse_dev_reg_umem(dev, umem.asid, umem.iova, umem.uaddr, umem.size); mutex_unlock(&dev->domain_lock); break; @@ -1431,15 +1513,24 @@ static long vduse_dev_ioctl(struct file *file, unsi= gned int cmd, break; =20 ret =3D -EINVAL; + /* TODO: Using asid from userspace, need to mitigate? */ if (!is_mem_zero((const char *)umem.reserved, - sizeof(umem.reserved))) + sizeof(umem.reserved)) || + (dev->api_version < VDUSE_API_VERSION_1 && + umem.asid !=3D 0) || + umem.asid > dev->nas) + break; + + + if (umem.asid > dev->nas) break; mutex_lock(&dev->domain_lock); - ret =3D vduse_dev_dereg_umem(dev, umem.iova, + ret =3D vduse_dev_dereg_umem(dev, umem.asid, umem.iova, umem.size); mutex_unlock(&dev->domain_lock); break; } + /* TODO can we merge this with GET_FD? */ case VDUSE_IOTLB_GET_INFO: { struct vduse_iova_info info; struct vhost_iotlb_map *map; @@ -1452,27 +1543,32 @@ static long vduse_dev_ioctl(struct file *file, unsi= gned int cmd, if (info.start > info.last) break; =20 + if (info.asid > dev->nas) + break; + if (!is_mem_zero((const char *)info.reserved, sizeof(info.reserved))) break; =20 mutex_lock(&dev->domain_lock); - if (!dev->domain) { + /* TODO asid comes from userspace. mitigations? */ + if (!dev->domain[info.asid]) { mutex_unlock(&dev->domain_lock); break; } - spin_lock(&dev->domain->iotlb_lock); - map =3D vhost_iotlb_itree_first(dev->domain->iotlb, + spin_lock(&dev->domain[info.asid]->iotlb_lock); + map =3D vhost_iotlb_itree_first(dev->domain[info.asid]->iotlb, info.start, info.last); if (map) { info.start =3D map->start; info.last =3D map->last; info.capability =3D 0; - if (dev->domain->bounce_map && map->start =3D=3D 0 && - map->last =3D=3D dev->domain->bounce_size - 1) + if (dev->domain[info.asid]->bounce_map && + map->start =3D=3D 0 && + map->last =3D=3D dev->domain[info.asid]->bounce_size - 1) info.capability |=3D VDUSE_IOVA_CAP_UMEM; } - spin_unlock(&dev->domain->iotlb_lock); + spin_unlock(&dev->domain[info.asid]->iotlb_lock); mutex_unlock(&dev->domain_lock); if (!map) break; @@ -1497,8 +1593,13 @@ static int vduse_dev_release(struct inode *inode, st= ruct file *file) struct vduse_dev *dev =3D file->private_data; =20 mutex_lock(&dev->domain_lock); - if (dev->domain) - vduse_dev_dereg_umem(dev, 0, dev->domain->bounce_size); + for (int i =3D 0; i < dev->nas; i++) { + if (dev->domain[i]) { + vduse_dev_dereg_umem(dev, i, 0, + dev->domain[i]->bounce_size); + dev->domain[i] =3D NULL; + } + } mutex_unlock(&dev->domain_lock); spin_lock(&dev->msg_lock); /* Make sure the inflight messages can processed after reconncection */ @@ -1768,9 +1869,12 @@ static int vduse_destroy_dev(char *name) idr_remove(&vduse_idr, dev->minor); kvfree(dev->config); vduse_dev_deinit_vqs(dev); - if (dev->domain) - vduse_domain_destroy(dev->domain); + for (int i =3D 0; i < dev->nas; i++) { + if (dev->domain[i]) + vduse_domain_destroy(dev->domain[i]); + } kfree(dev->name); + kfree(dev->umem); vduse_dev_destroy(dev); module_put(THIS_MODULE); =20 @@ -1877,7 +1981,8 @@ static ssize_t bounce_size_store(struct device *devic= e, =20 ret =3D -EPERM; mutex_lock(&dev->domain_lock); - if (dev->domain) + /* Assuming that if the first domain is allocated, all are allocated */ + if (dev->domain[0]) goto unlock; =20 ret =3D kstrtouint(buf, 10, &bounce_size); @@ -1933,11 +2038,20 @@ static int vduse_create_dev(struct vduse_dev_config= *config, if (config->ngroups > VDUSE_MAX_VQ_GROUPS) { pr_err("Not creating a VDUSE device with %u vq groups. Max: %u", config->ngroups, VDUSE_MAX_VQ_GROUPS); + /* TODO: Need to destroy dev here too! */ goto err; } + if (config->nas > VDUSE_MAX_ASID) { + pr_err("Not creating a VDUSE device with %u asid. Max: %u", + config->nas, VDUSE_MAX_ASID); + goto err_nas; + } + dev->ngroups =3D config->ngroups ?: 1; + dev->nas =3D config->nas ?: 1; } else { dev->ngroups =3D 1; + dev->nas =3D 1; } for (u32 i =3D 0; i < dev->ngroups; ++i) dev->groups[i].dev =3D dev; @@ -1977,6 +2091,7 @@ static int vduse_create_dev(struct vduse_dev_config *= config, err_idr: kfree(dev->name); err_str: +err_nas: vduse_dev_destroy(dev); err: return ret; @@ -2069,7 +2184,6 @@ static int vduse_open(struct inode *inode, struct fil= e *file) if (!control) return -ENOMEM; =20 - control->api_version =3D VDUSE_API_VERSION; file->private_data =3D control; =20 return 0; @@ -2101,7 +2215,7 @@ static int vduse_dev_init_vdpa(struct vduse_dev *dev,= const char *name) =20 vdev =3D vdpa_alloc_device(struct vduse_vdpa, vdpa, dev->dev, &vduse_vdpa_config_ops, &vduse_map_ops, - dev->ngroups, 1, name, true); + dev->ngroups, dev->nas, name, true); if (IS_ERR(vdev)) return PTR_ERR(vdev); =20 @@ -2137,11 +2251,23 @@ static int vdpa_dev_add(struct vdpa_mgmt_dev *mdev,= const char *name, return ret; =20 mutex_lock(&dev->domain_lock); - if (!dev->domain) - dev->domain =3D vduse_domain_create(VDUSE_IOVA_SIZE - 1, - dev->bounce_size); + ret =3D 0; + + /* TODO we could delay the creation of the domain */ + for (int i =3D 0; i < dev->nas; ++i) { + if (!dev->domain[i]) + dev->domain[i] =3D vduse_domain_create(VDUSE_IOVA_SIZE - 1, + dev->bounce_size); + if (!dev->domain[i]) { + ret =3D -ENOMEM; + for (int j =3D 0; j < i; ++j) + vduse_domain_destroy(dev->domain[j]); + goto err_domain; + } + } + mutex_unlock(&dev->domain_lock); - if (!dev->domain) { + if (ret =3D=3D -ENOMEM) { put_device(&dev->vdev->vdpa.dev); return -ENOMEM; } @@ -2150,13 +2276,22 @@ static int vdpa_dev_add(struct vdpa_mgmt_dev *mdev,= const char *name, if (ret) { put_device(&dev->vdev->vdpa.dev); mutex_lock(&dev->domain_lock); - vduse_domain_destroy(dev->domain); - dev->domain =3D NULL; + for (int i =3D 0; i < dev->nas; i++) { + if (dev->domain[i]) { + vduse_domain_destroy(dev->domain[i]); + dev->domain[i] =3D NULL; + } + } mutex_unlock(&dev->domain_lock); return ret; } =20 return 0; + +err_domain: + /* TODO do I need to call put_device? */ + mutex_unlock(&dev->domain_lock); + return ret; } =20 static void vdpa_dev_del(struct vdpa_mgmt_dev *mdev, struct vdpa_device *d= ev) diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h index b4b139dc76bb..d300fd5f867f 100644 --- a/include/uapi/linux/vduse.h +++ b/include/uapi/linux/vduse.h @@ -47,7 +47,8 @@ struct vduse_dev_config { __u32 vq_num; __u32 vq_align; __u32 ngroups; /* if VDUSE_API_VERSION >=3D 1 */ - __u32 reserved[12]; + __u32 nas; /* if VDUSE_API_VERSION >=3D 1 */ + __u32 reserved[11]; __u32 config_size; __u8 config[]; }; @@ -82,6 +83,17 @@ struct vduse_iotlb_entry { __u8 perm; }; =20 +struct vduse_iotlb_entry_v2 { + __u64 offset; + __u64 start; + __u64 last; +#define VDUSE_ACCESS_RO 0x1 +#define VDUSE_ACCESS_WO 0x2 +#define VDUSE_ACCESS_RW 0x3 + __u8 perm; + __u32 asid; +}; + /* * Find the first IOVA region that overlaps with the range [start, last] * and return the corresponding file descriptor. Return -EINVAL means the @@ -172,6 +184,16 @@ struct vduse_vq_group { __u32 num; }; =20 +/** + * struct vduse_vq_group - virtqueue group + @ @group: Index of the virtqueue group + * @asid: Address space ID of the group + */ +struct vduse_vq_group_asid { + __u32 group; + __u32 asid; +}; + /** * struct vduse_vq_info - information of a virtqueue * @index: virtqueue index @@ -232,6 +254,7 @@ struct vduse_vq_eventfd { * @uaddr: start address of userspace memory, it must be aligned to page s= ize * @iova: start of the IOVA region * @size: size of the IOVA region + * @asid: Address space ID of the IOVA region * @reserved: for future use, needs to be initialized to zero * * Structure used by VDUSE_IOTLB_REG_UMEM and VDUSE_IOTLB_DEREG_UMEM @@ -241,7 +264,8 @@ struct vduse_iova_umem { __u64 uaddr; __u64 iova; __u64 size; - __u64 reserved[3]; + __u32 asid; + __u32 reserved[5]; }; =20 /* Register userspace memory for IOVA regions */ @@ -265,7 +289,8 @@ struct vduse_iova_info { __u64 last; #define VDUSE_IOVA_CAP_UMEM (1 << 0) __u64 capability; - __u64 reserved[3]; + __u32 asid; /* Only if device API version >=3D 1 */ + __u32 reserved[5]; }; =20 /* @@ -289,6 +314,7 @@ enum vduse_req_type { VDUSE_UPDATE_IOTLB, VDUSE_GET_VQ_GROUP, VDUSE_GET_VRING_DESC_GROUP, + VDUSE_SET_VQ_GROUP_ASID, }; =20 /** @@ -344,6 +370,8 @@ struct vduse_dev_request { struct vduse_dev_status s; struct vduse_iova_range iova; struct vduse_vq_group vq_group; /* Only if vduse api version >=3D 1 */ + /* Only if vduse api version >=3D 1 */ + struct vduse_vq_group_asid vq_group_asid; __u32 padding[32]; }; }; @@ -367,6 +395,8 @@ struct vduse_dev_response { union { struct vduse_vq_state vq_state; struct vduse_vq_group vq_group; /* Only if vduse api version >=3D 1 */ + /* Only if vduse api version >=3D 1 */ + struct vduse_vq_group_asid vq_group_asid; __u32 padding[32]; }; }; --=20 2.50.1