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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

...ev->work_list); dev->worker = NULL; @@ -537,6 +543,15 @@ void vhost_dev_stop(struct vhost_dev *dev) } EXPORT_SYMBOL_GPL(vhost_dev_stop); +static void vhost_umem_free(struct vhost_umem *umem, + struct vhost_umem_node *node) +{ + vhost_umem_interval_tree_remove(node, &umem->umem_tree); + list_del(&node->link); + kfree(node); + umem->numem--; +} + static void vhost_umem_clean(struct vhost_umem *umem) { struct vhost_umem_node *node, *tmp; @@ -544,11 +559,9 @@ static void vhost_umem_clean(struct vhost_umem *umem) if (!umem) return; - list_for_each_entry_safe(n...

...XPORT_SYMBOL_GPL(vhost_dev_stop); +static void vhost_umem_clean(struct vhost_dev *dev) +{ + struct vhost_umem_node *node, *tmp; + struct vhost_umem *umem = dev->umem; + + list_for_each_entry_safe(node, tmp, &umem->umem_list, link) { + vhost_umem_interval_tree_remove(node, &umem->umem_tree); + list_del(&node->link); + kvfree(node); + } + kvfree(umem); +} + /* Caller should have device mutex if and only if locked is set */ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) { @@ -549,8 +576,8 @@ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) fput(dev-...

...XPORT_SYMBOL_GPL(vhost_dev_stop); +static void vhost_umem_clean(struct vhost_dev *dev) +{ + struct vhost_umem_node *node, *tmp; + struct vhost_umem *umem = dev->umem; + + list_for_each_entry_safe(node, tmp, &umem->umem_list, link) { + vhost_umem_interval_tree_remove(node, &umem->umem_tree); + list_del(&node->link); + kvfree(node); + } + kvfree(umem); +} + /* Caller should have device mutex if and only if locked is set */ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) { @@ -549,8 +576,8 @@ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) fput(dev-...

...; for (i = 0; i < dev->nvqs; ++i) { @@ -563,6 +573,15 @@ void vhost_dev_stop(struct vhost_dev *dev) } EXPORT_SYMBOL_GPL(vhost_dev_stop); +static void vhost_umem_free(struct vhost_umem *umem, + struct vhost_umem_node *node) +{ + vhost_umem_interval_tree_remove(node, &umem->umem_tree); + list_del(&node->link); + kfree(node); + umem->numem--; +} + static void vhost_umem_clean(struct vhost_umem *umem) { struct vhost_umem_node *node, *tmp; @@ -570,14 +589,31 @@ static void vhost_umem_clean(struct vhost_umem *umem) if (!umem) return; - list_for_each_entry_safe(...

...vhost_umem *umem = vq->iotlb; - u64 s = 0, size, orig_addr = addr, last = addr + len - 1; + u64 s = 0, size, orig_addr = addr, last = addr + len; if (vhost_vq_meta_fetch(vq, addr, len, type)) return true; while (len > s) { node = vhost_umem_interval_tree_iter_first(&umem->umem_tree, - addr, - last); + addr, last); if (node == NULL || node->start > addr) { vhost_iotlb_miss(vq, addr, access); return false; @@ -1455,7 +1454,7 @@ static long vhost_set_memory(struct vhost_dev *d, struct vhost_memory __user *m) region->guest_phy...

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace IOMMU implementation (qemu) 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: - when there's a IOTLB miss, it will notify userspace through

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace IOMMU implementation (qemu) 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: - when there's a IOTLB miss, it will notify userspace through

...ev *dev) } EXPORT_SYMBOL_GPL(vhost_dev_stop); +static void vhost_umem_clean(struct vhost_umem *umem) +{ + struct vhost_umem_node *node, *tmp; + + if (!umem) + return; + + list_for_each_entry_safe(node, tmp, &umem->umem_list, link) { + vhost_umem_interval_tree_remove(node, &umem->umem_tree); + list_del(&node->link); + kvfree(node); + } + kvfree(umem); +} + /* Caller should have device mutex if and only if locked is set */ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) { @@ -549,8 +578,8 @@ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) fput(dev-...

...gt; > @@ -537,6 +543,15 @@ void vhost_dev_stop(struct vhost_dev *dev) > } > EXPORT_SYMBOL_GPL(vhost_dev_stop); > > +static void vhost_umem_free(struct vhost_umem *umem, > + struct vhost_umem_node *node) > +{ > + vhost_umem_interval_tree_remove(node, &umem->umem_tree); > + list_del(&node->link); > + kfree(node); > + umem->numem--; > +} > + > static void vhost_umem_clean(struct vhost_umem *umem) > { > struct vhost_umem_node *node, *tmp; > @@ -544,11 +559,9 @@ static void vhost_umem_clean(struct vhost_umem *umem) > if...

...gt; > @@ -537,6 +543,15 @@ void vhost_dev_stop(struct vhost_dev *dev) > } > EXPORT_SYMBOL_GPL(vhost_dev_stop); > > +static void vhost_umem_free(struct vhost_umem *umem, > + struct vhost_umem_node *node) > +{ > + vhost_umem_interval_tree_remove(node, &umem->umem_tree); > + list_del(&node->link); > + kfree(node); > + umem->numem--; > +} > + > static void vhost_umem_clean(struct vhost_umem *umem) > { > struct vhost_umem_node *node, *tmp; > @@ -544,11 +559,9 @@ static void vhost_umem_clean(struct vhost_umem *umem) > if...

...> +static void vhost_umem_clean(struct vhost_dev *dev) > +{ > + struct vhost_umem_node *node, *tmp; > + struct vhost_umem *umem = dev->umem; > + > + list_for_each_entry_safe(node, tmp, &umem->umem_list, link) { > + vhost_umem_interval_tree_remove(node, &umem->umem_tree); > + list_del(&node->link); > + kvfree(node); > + } > + kvfree(umem); > +} > + > /* Caller should have device mutex if and only if locked is set */ > void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) > { > @@ -549,8 +576,8 @@ void vhost_dev_cleanu...

...eanup makes sure * VQs aren't running. @@ -618,28 +618,6 @@ void vhost_dev_stop(struct vhost_dev *dev) } EXPORT_SYMBOL_GPL(vhost_dev_stop); -static void vhost_umem_free(struct vhost_umem *umem, - struct vhost_umem_node *node) -{ - vhost_umem_interval_tree_remove(node, &umem->umem_tree); - list_del(&node->link); - kfree(node); - umem->numem--; -} - -static void vhost_umem_clean(struct vhost_umem *umem) -{ - struct vhost_umem_node *node, *tmp; - - if (!umem) - return; - - list_for_each_entry_safe(node, tmp, &umem->umem_list, link) - vhost_umem_free(umem, node);...

...t; > +static void vhost_umem_clean(struct vhost_umem *umem) > +{ > + struct vhost_umem_node *node, *tmp; > + > + if (!umem) > + return; > + > + list_for_each_entry_safe(node, tmp, &umem->umem_list, link) { > + vhost_umem_interval_tree_remove(node, &umem->umem_tree); > + list_del(&node->link); > + kvfree(node); > + } > + kvfree(umem); > +} > + > /* Caller should have device mutex if and only if locked is set */ > void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) > { > @@ -549,8 +578,8 @@ void vhost_dev_cleanu...

...t; > +static void vhost_umem_clean(struct vhost_umem *umem) > +{ > + struct vhost_umem_node *node, *tmp; > + > + if (!umem) > + return; > + > + list_for_each_entry_safe(node, tmp, &umem->umem_list, link) { > + vhost_umem_interval_tree_remove(node, &umem->umem_tree); > + list_del(&node->link); > + kvfree(node); > + } > + kvfree(umem); > +} > + > /* Caller should have device mutex if and only if locked is set */ > void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) > { > @@ -549,8 +578,8 @@ void vhost_dev_cleanu...

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace IOMMU implementation (qemu) 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: - when there's a IOTLB miss, it will notify userspace through

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace IOMMU implementation (qemu) 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: - when there's a IOTLB miss, it will notify userspace through

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace IOMMU implementation (qemu) 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: - when there's a IOTLB miss, it will notify userspace through

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace IOMMU implementation (qemu) 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: - when there's a IOTLB miss, it will notify userspace through