search for: vhost_iotlb_size

...c2f11..729fe05 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -113,6 +113,11 @@ static void vhost_init_is_le(struct vhost_virtqueue *vq) } #endif /* CONFIG_VHOST_CROSS_ENDIAN_LEGACY */ +static inline int vhost_iotlb_hash(u64 iova) +{ + return (iova >> PAGE_SHIFT) & (VHOST_IOTLB_SIZE - 1); +} + static void vhost_poll_func(struct file *file, wait_queue_head_t *wqh, poll_table *pt) { @@ -384,8 +389,14 @@ void vhost_dev_init(struct vhost_dev *dev, dev->memory = NULL; dev->mm = NULL; spin_lock_init(&dev->work_lock); + spin_lock_init(&dev->iotlb_l...

...c2f11..729fe05 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -113,6 +113,11 @@ static void vhost_init_is_le(struct vhost_virtqueue *vq) } #endif /* CONFIG_VHOST_CROSS_ENDIAN_LEGACY */ +static inline int vhost_iotlb_hash(u64 iova) +{ + return (iova >> PAGE_SHIFT) & (VHOST_IOTLB_SIZE - 1); +} + static void vhost_poll_func(struct file *file, wait_queue_head_t *wqh, poll_table *pt) { @@ -384,8 +389,14 @@ void vhost_dev_init(struct vhost_dev *dev, dev->memory = NULL; dev->mm = NULL; spin_lock_init(&dev->work_lock); + spin_lock_init(&dev->iotlb_l...

...t/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -113,6 +113,11 @@ static void vhost_init_is_le(struct vhost_virtqueue *vq) > } > #endif /* CONFIG_VHOST_CROSS_ENDIAN_LEGACY */ > > +static inline int vhost_iotlb_hash(u64 iova) > +{ > + return (iova >> PAGE_SHIFT) & (VHOST_IOTLB_SIZE - 1); > +} > + > static void vhost_poll_func(struct file *file, wait_queue_head_t *wqh, > poll_table *pt) > { > @@ -384,8 +389,14 @@ void vhost_dev_init(struct vhost_dev *dev, > dev->memory = NULL; > dev->mm = NULL; > spin_lock_init(&dev->work...

...SYMBOL_GPL(vhost_vq_access_ok); +static int vhost_new_umem_range(struct vhost_umem *umem, + u64 start, u64 size, u64 end, + u64 userspace_addr, int perm) +{ + struct vhost_umem_node *tmp, *node = kmalloc(sizeof(*node), GFP_ATOMIC); + + if (!node) + return -ENOMEM; + + if (umem->numem == VHOST_IOTLB_SIZE) { + tmp = list_last_entry(&umem->umem_list, typeof(*tmp), link); + vhost_umem_free(umem, tmp); + } + + node->start = start; + node->size = size; + node->last = end; + node->userspace_addr = userspace_addr; + node->perm = perm; + INIT_LIST_HEAD(&node->link); + list_ad...

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace(qemu) implementation of iommu for a secure DMA environment (DMAR) in guest. The idea is simple. When vhost meets an IOTLB miss, it will request the assistance of userspace to do the translation, this is done through: - Fill the translation request in a preset userspace address (This

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace(qemu) implementation of iommu for a secure DMA environment (DMAR) in guest. The idea is simple. When vhost meets an IOTLB miss, it will request the assistance of userspace to do the translation, this is done through: - Fill the translation request in a preset userspace address (This

...vhost_new_umem_range(struct vhost_umem *umem, > + u64 start, u64 size, u64 end, > + u64 userspace_addr, int perm) > +{ > + struct vhost_umem_node *tmp, *node = kmalloc(sizeof(*node), GFP_ATOMIC); > + > + if (!node) > + return -ENOMEM; > + > + if (umem->numem == VHOST_IOTLB_SIZE) { > + tmp = list_last_entry(&umem->umem_list, typeof(*tmp), link); > + vhost_umem_free(umem, tmp); > + } > + > + node->start = start; > + node->size = size; > + node->last = end; > + node->userspace_addr = userspace_addr; > + node->perm = perm; &g...

...vhost_new_umem_range(struct vhost_umem *umem, > + u64 start, u64 size, u64 end, > + u64 userspace_addr, int perm) > +{ > + struct vhost_umem_node *tmp, *node = kmalloc(sizeof(*node), GFP_ATOMIC); > + > + if (!node) > + return -ENOMEM; > + > + if (umem->numem == VHOST_IOTLB_SIZE) { > + tmp = list_last_entry(&umem->umem_list, typeof(*tmp), link); > + vhost_umem_free(umem, tmp); > + } > + > + node->start = start; > + node->size = size; > + node->last = end; > + node->userspace_addr = userspace_addr; > + node->perm = perm; &g...