Merge branches 'v5.4/vfio/alexey-tce-memory-free-v1',... (e6c5d727) · Commits · 戴 / test

drivers/vfio/pci/vfio_pci.c

+13 −4

Original line number	Diff line number	Diff line
		@@ -438,11 +438,20 @@ static void vfio_pci_disable(struct vfio_pci_device *vdev)
		pci_write_config_word(pdev, PCI_COMMAND, PCI_COMMAND_INTX_DISABLE);

		/*
		* Try to reset the device. The success of this is dependent on
		* being able to lock the device, which is not always possible.
		* Try to get the locks ourselves to prevent a deadlock. The
		* success of this is dependent on being able to lock the device,
		* which is not always possible.
		* We can not use the "try" reset interface here, which will
		* overwrite the previously restored configuration information.
		*/
		if (vdev->reset_works && !pci_try_reset_function(pdev))
		if (vdev->reset_works && pci_cfg_access_trylock(pdev)) {
		if (device_trylock(&pdev->dev)) {
		if (!__pci_reset_function_locked(pdev))
		vdev->needs_reset = false;
		device_unlock(&pdev->dev);
		}
		pci_cfg_access_unlock(pdev);
		}

		pci_restore_state(pdev);
		out:

drivers/vfio/vfio_iommu_spapr_tce.c

+5 −4

Original line number	Diff line number	Diff line
		@@ -1234,7 +1234,7 @@ release_exit:
		static int tce_iommu_attach_group(void *iommu_data,
		struct iommu_group *iommu_group)
		{
		int ret;
		int ret = 0;
		struct tce_container *container = iommu_data;
		struct iommu_table_group *table_group;
		struct tce_iommu_group *tcegrp = NULL;
		@@ -1287,13 +1287,13 @@ static int tce_iommu_attach_group(void *iommu_data,
		!table_group->ops->release_ownership) {
		if (container->v2) {
		ret = -EPERM;
		goto unlock_exit;
		goto free_exit;
		}
		ret = tce_iommu_take_ownership(container, table_group);
		} else {
		if (!container->v2) {
		ret = -EPERM;
		goto unlock_exit;
		goto free_exit;
		}
		ret = tce_iommu_take_ownership_ddw(container, table_group);
		if (!tce_groups_attached(container) && !container->tables[0])
		@@ -1305,10 +1305,11 @@ static int tce_iommu_attach_group(void *iommu_data,
		list_add(&tcegrp->next, &container->group_list);
		}

		unlock_exit:
		free_exit:
		if (ret && tcegrp)
		kfree(tcegrp);

		unlock_exit:
		mutex_unlock(&container->lock);

		return ret;

drivers/vfio/vfio_iommu_type1.c

+506 −12

Original line number	Diff line number	Diff line
		@@ -62,6 +62,7 @@ MODULE_PARM_DESC(dma_entry_limit,

		struct vfio_iommu {
		struct list_head domain_list;
		struct list_head iova_list;
		struct vfio_domain external_domain; / domain for external user */
		struct mutex lock;
		struct rb_root dma_list;
		@@ -97,6 +98,12 @@ struct vfio_group {
		bool mdev_group; /* An mdev group */
		};

		struct vfio_iova {
		struct list_head list;
		dma_addr_t start;
		dma_addr_t end;
		};

		/*
		* Guest RAM pinning working set or DMA target
		*/
		@@ -1031,6 +1038,27 @@ static int vfio_pin_map_dma(struct vfio_iommu iommu, struct vfio_dma dma,
		return ret;
		}

		/*
		* Check dma map request is within a valid iova range
		*/
		static bool vfio_iommu_iova_dma_valid(struct vfio_iommu *iommu,
		dma_addr_t start, dma_addr_t end)
		{
		struct list_head *iova = &iommu->iova_list;
		struct vfio_iova *node;

		list_for_each_entry(node, iova, list) {
		if (start >= node->start && end <= node->end)
		return true;
		}

		/*
		* Check for list_empty() as well since a container with
		* a single mdev device will have an empty list.
		*/
		return list_empty(iova);
		}

		static int vfio_dma_do_map(struct vfio_iommu *iommu,
		struct vfio_iommu_type1_dma_map *map)
		{
		@@ -1074,6 +1102,11 @@ static int vfio_dma_do_map(struct vfio_iommu *iommu,
		goto out_unlock;
		}

		if (!vfio_iommu_iova_dma_valid(iommu, iova, iova + size - 1)) {
		ret = -EINVAL;
		goto out_unlock;
		}

		dma = kzalloc(sizeof(*dma), GFP_KERNEL);
		if (!dma) {
		ret = -ENOMEM;
		@@ -1263,15 +1296,13 @@ static struct vfio_group find_iommu_group(struct vfio_domain domain,
		return NULL;
		}

		static bool vfio_iommu_has_sw_msi(struct iommu_group group, phys_addr_t base)
		static bool vfio_iommu_has_sw_msi(struct list_head *group_resv_regions,
		phys_addr_t *base)
		{
		struct list_head group_resv_regions;
		struct iommu_resv_region region, next;
		struct iommu_resv_region *region;
		bool ret = false;

		INIT_LIST_HEAD(&group_resv_regions);
		iommu_get_group_resv_regions(group, &group_resv_regions);
		list_for_each_entry(region, &group_resv_regions, list) {
		list_for_each_entry(region, group_resv_regions, list) {
		/*
		* The presence of any 'real' MSI regions should take
		* precedence over the software-managed one if the
		@@ -1287,8 +1318,7 @@ static bool vfio_iommu_has_sw_msi(struct iommu_group group, phys_addr_t base)
		ret = true;
		}
		}
		list_for_each_entry_safe(region, next, &group_resv_regions, list)
		kfree(region);

		return ret;
		}

		@@ -1388,6 +1418,228 @@ static int vfio_mdev_iommu_device(struct device dev, void data)
		return 0;
		}

		/*
		* This is a helper function to insert an address range to iova list.
		* The list is initially created with a single entry corresponding to
		* the IOMMU domain geometry to which the device group is attached.
		* The list aperture gets modified when a new domain is added to the
		* container if the new aperture doesn't conflict with the current one
		* or with any existing dma mappings. The list is also modified to
		* exclude any reserved regions associated with the device group.
		*/
		static int vfio_iommu_iova_insert(struct list_head *head,
		dma_addr_t start, dma_addr_t end)
		{
		struct vfio_iova *region;

		region = kmalloc(sizeof(*region), GFP_KERNEL);
		if (!region)
		return -ENOMEM;

		INIT_LIST_HEAD(&region->list);
		region->start = start;
		region->end = end;

		list_add_tail(&region->list, head);
		return 0;
		}

		/*
		* Check the new iommu aperture conflicts with existing aper or with any
		* existing dma mappings.
		*/
		static bool vfio_iommu_aper_conflict(struct vfio_iommu *iommu,
		dma_addr_t start, dma_addr_t end)
		{
		struct vfio_iova first, last;
		struct list_head *iova = &iommu->iova_list;

		if (list_empty(iova))
		return false;

		/* Disjoint sets, return conflict */
		first = list_first_entry(iova, struct vfio_iova, list);
		last = list_last_entry(iova, struct vfio_iova, list);
		if (start > last->end \|\| end < first->start)
		return true;

		/* Check for any existing dma mappings below the new start */
		if (start > first->start) {
		if (vfio_find_dma(iommu, first->start, start - first->start))
		return true;
		}

		/* Check for any existing dma mappings beyond the new end */
		if (end < last->end) {
		if (vfio_find_dma(iommu, end + 1, last->end - end))
		return true;
		}

		return false;
		}

		/*
		* Resize iommu iova aperture window. This is called only if the new
		* aperture has no conflict with existing aperture and dma mappings.
		*/
		static int vfio_iommu_aper_resize(struct list_head *iova,
		dma_addr_t start, dma_addr_t end)
		{
		struct vfio_iova node, next;

		if (list_empty(iova))
		return vfio_iommu_iova_insert(iova, start, end);

		/* Adjust iova list start */
		list_for_each_entry_safe(node, next, iova, list) {
		if (start < node->start)
		break;
		if (start >= node->start && start < node->end) {
		node->start = start;
		break;
		}
		/* Delete nodes before new start */
		list_del(&node->list);
		kfree(node);
		}

		/* Adjust iova list end */
		list_for_each_entry_safe(node, next, iova, list) {
		if (end > node->end)
		continue;
		if (end > node->start && end <= node->end) {
		node->end = end;
		continue;
		}
		/* Delete nodes after new end */
		list_del(&node->list);
		kfree(node);
		}

		return 0;
		}

		/*
		* Check reserved region conflicts with existing dma mappings
		*/
		static bool vfio_iommu_resv_conflict(struct vfio_iommu *iommu,
		struct list_head *resv_regions)
		{
		struct iommu_resv_region *region;

		/* Check for conflict with existing dma mappings */
		list_for_each_entry(region, resv_regions, list) {
		if (region->type == IOMMU_RESV_DIRECT_RELAXABLE)
		continue;

		if (vfio_find_dma(iommu, region->start, region->length))
		return true;
		}

		return false;
		}

		/*
		* Check iova region overlap with reserved regions and
		* exclude them from the iommu iova range
		*/
		static int vfio_iommu_resv_exclude(struct list_head *iova,
		struct list_head *resv_regions)
		{
		struct iommu_resv_region *resv;
		struct vfio_iova n, next;

		list_for_each_entry(resv, resv_regions, list) {
		phys_addr_t start, end;

		if (resv->type == IOMMU_RESV_DIRECT_RELAXABLE)
		continue;

		start = resv->start;
		end = resv->start + resv->length - 1;

		list_for_each_entry_safe(n, next, iova, list) {
		int ret = 0;

		/* No overlap */
		if (start > n->end \|\| end < n->start)
		continue;
		/*
		* Insert a new node if current node overlaps with the
		* reserve region to exlude that from valid iova range.
		* Note that, new node is inserted before the current
		* node and finally the current node is deleted keeping
		* the list updated and sorted.
		*/
		if (start > n->start)
		ret = vfio_iommu_iova_insert(&n->list, n->start,
		start - 1);
		if (!ret && end < n->end)
		ret = vfio_iommu_iova_insert(&n->list, end + 1,
		n->end);
		if (ret)
		return ret;

		list_del(&n->list);
		kfree(n);
		}
		}

		if (list_empty(iova))
		return -EINVAL;

		return 0;
		}

		static void vfio_iommu_resv_free(struct list_head *resv_regions)
		{
		struct iommu_resv_region n, next;

		list_for_each_entry_safe(n, next, resv_regions, list) {
		list_del(&n->list);
		kfree(n);
		}
		}

		static void vfio_iommu_iova_free(struct list_head *iova)
		{
		struct vfio_iova n, next;

		list_for_each_entry_safe(n, next, iova, list) {
		list_del(&n->list);
		kfree(n);
		}
		}

		static int vfio_iommu_iova_get_copy(struct vfio_iommu *iommu,
		struct list_head *iova_copy)
		{
		struct list_head *iova = &iommu->iova_list;
		struct vfio_iova *n;
		int ret;

		list_for_each_entry(n, iova, list) {
		ret = vfio_iommu_iova_insert(iova_copy, n->start, n->end);
		if (ret)
		goto out_free;
		}

		return 0;

		out_free:
		vfio_iommu_iova_free(iova_copy);
		return ret;
		}

		static void vfio_iommu_iova_insert_copy(struct vfio_iommu *iommu,
		struct list_head *iova_copy)
		{
		struct list_head *iova = &iommu->iova_list;

		vfio_iommu_iova_free(iova);

		list_splice_tail(iova_copy, iova);
		}
		static int vfio_iommu_type1_attach_group(void *iommu_data,
		struct iommu_group *iommu_group)
		{
		@@ -1398,6 +1650,9 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
		int ret;
		bool resv_msi, msi_remap;
		phys_addr_t resv_msi_base;
		struct iommu_domain_geometry geo;
		LIST_HEAD(iova_copy);
		LIST_HEAD(group_resv_regions);

		mutex_lock(&iommu->lock);

		@@ -1474,7 +1729,43 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
		if (ret)
		goto out_domain;

		resv_msi = vfio_iommu_has_sw_msi(iommu_group, &resv_msi_base);
		/* Get aperture info */
		iommu_domain_get_attr(domain->domain, DOMAIN_ATTR_GEOMETRY, &geo);

		if (vfio_iommu_aper_conflict(iommu, geo.aperture_start,
		geo.aperture_end)) {
		ret = -EINVAL;
		goto out_detach;
		}

		ret = iommu_get_group_resv_regions(iommu_group, &group_resv_regions);
		if (ret)
		goto out_detach;

		if (vfio_iommu_resv_conflict(iommu, &group_resv_regions)) {
		ret = -EINVAL;
		goto out_detach;
		}

		/*
		* We don't want to work on the original iova list as the list
		* gets modified and in case of failure we have to retain the
		* original list. Get a copy here.
		*/
		ret = vfio_iommu_iova_get_copy(iommu, &iova_copy);
		if (ret)
		goto out_detach;

		ret = vfio_iommu_aper_resize(&iova_copy, geo.aperture_start,
		geo.aperture_end);
		if (ret)
		goto out_detach;

		ret = vfio_iommu_resv_exclude(&iova_copy, &group_resv_regions);
		if (ret)
		goto out_detach;

		resv_msi = vfio_iommu_has_sw_msi(&group_resv_regions, &resv_msi_base);

		INIT_LIST_HEAD(&domain->group_list);
		list_add(&group->next, &domain->group_list);
		@@ -1507,8 +1798,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
		list_add(&group->next, &d->group_list);
		iommu_domain_free(domain->domain);
		kfree(domain);
		mutex_unlock(&iommu->lock);
		return 0;
		goto done;
		}

		ret = vfio_iommu_attach_group(domain, group);
		@@ -1531,8 +1821,11 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
		}

		list_add(&domain->next, &iommu->domain_list);

		done:
		/* Delete the old one and insert new iova list */
		vfio_iommu_iova_insert_copy(iommu, &iova_copy);
		mutex_unlock(&iommu->lock);
		vfio_iommu_resv_free(&group_resv_regions);

		return 0;

		@@ -1540,6 +1833,8 @@ out_detach:
		vfio_iommu_detach_group(domain, group);
		out_domain:
		iommu_domain_free(domain->domain);
		vfio_iommu_iova_free(&iova_copy);
		vfio_iommu_resv_free(&group_resv_regions);
		out_free:
		kfree(domain);
		kfree(group);
		@@ -1595,12 +1890,93 @@ static void vfio_sanity_check_pfn_list(struct vfio_iommu *iommu)
		WARN_ON(iommu->notifier.head);
		}

		/*
		* Called when a domain is removed in detach. It is possible that
		* the removed domain decided the iova aperture window. Modify the
		* iova aperture with the smallest window among existing domains.
		*/
		static void vfio_iommu_aper_expand(struct vfio_iommu *iommu,
		struct list_head *iova_copy)
		{
		struct vfio_domain *domain;
		struct iommu_domain_geometry geo;
		struct vfio_iova *node;
		dma_addr_t start = 0;
		dma_addr_t end = (dma_addr_t)~0;

		if (list_empty(iova_copy))
		return;

		list_for_each_entry(domain, &iommu->domain_list, next) {
		iommu_domain_get_attr(domain->domain, DOMAIN_ATTR_GEOMETRY,
		&geo);
		if (geo.aperture_start > start)
		start = geo.aperture_start;
		if (geo.aperture_end < end)
		end = geo.aperture_end;
		}

		/* Modify aperture limits. The new aper is either same or bigger */
		node = list_first_entry(iova_copy, struct vfio_iova, list);
		node->start = start;
		node = list_last_entry(iova_copy, struct vfio_iova, list);
		node->end = end;
		}

		/*
		* Called when a group is detached. The reserved regions for that
		* group can be part of valid iova now. But since reserved regions
		* may be duplicated among groups, populate the iova valid regions
		* list again.
		*/
		static int vfio_iommu_resv_refresh(struct vfio_iommu *iommu,
		struct list_head *iova_copy)
		{
		struct vfio_domain *d;
		struct vfio_group *g;
		struct vfio_iova *node;
		dma_addr_t start, end;
		LIST_HEAD(resv_regions);
		int ret;

		if (list_empty(iova_copy))
		return -EINVAL;

		list_for_each_entry(d, &iommu->domain_list, next) {
		list_for_each_entry(g, &d->group_list, next) {
		ret = iommu_get_group_resv_regions(g->iommu_group,
		&resv_regions);
		if (ret)
		goto done;
		}
		}

		node = list_first_entry(iova_copy, struct vfio_iova, list);
		start = node->start;
		node = list_last_entry(iova_copy, struct vfio_iova, list);
		end = node->end;

		/* purge the iova list and create new one */
		vfio_iommu_iova_free(iova_copy);

		ret = vfio_iommu_aper_resize(iova_copy, start, end);
		if (ret)
		goto done;

		/* Exclude current reserved regions from iova ranges */
		ret = vfio_iommu_resv_exclude(iova_copy, &resv_regions);
		done:
		vfio_iommu_resv_free(&resv_regions);
		return ret;
		}

		static void vfio_iommu_type1_detach_group(void *iommu_data,
		struct iommu_group *iommu_group)
		{
		struct vfio_iommu *iommu = iommu_data;
		struct vfio_domain *domain;
		struct vfio_group *group;
		LIST_HEAD(iova_copy);

		mutex_lock(&iommu->lock);

		@@ -1623,6 +1999,13 @@ static void vfio_iommu_type1_detach_group(void *iommu_data,
		}
		}

		/*
		* Get a copy of iova list. This will be used to update
		* and to replace the current one later. Please note that
		* we will leave the original list as it is if update fails.
		*/
		vfio_iommu_iova_get_copy(iommu, &iova_copy);

		list_for_each_entry(domain, &iommu->domain_list, next) {
		group = find_iommu_group(domain, iommu_group);
		if (!group)
		@@ -1648,10 +2031,16 @@ static void vfio_iommu_type1_detach_group(void *iommu_data,
		iommu_domain_free(domain->domain);
		list_del(&domain->next);
		kfree(domain);
		vfio_iommu_aper_expand(iommu, &iova_copy);
		}
		break;
		}

		if (!vfio_iommu_resv_refresh(iommu, &iova_copy))
		vfio_iommu_iova_insert_copy(iommu, &iova_copy);
		else
		vfio_iommu_iova_free(&iova_copy);

		detach_group_done:
		mutex_unlock(&iommu->lock);
		}
		@@ -1679,6 +2068,7 @@ static void *vfio_iommu_type1_open(unsigned long arg)
		}

		INIT_LIST_HEAD(&iommu->domain_list);
		INIT_LIST_HEAD(&iommu->iova_list);
		iommu->dma_list = RB_ROOT;
		iommu->dma_avail = dma_entry_limit;
		mutex_init(&iommu->lock);
		@@ -1722,6 +2112,9 @@ static void vfio_iommu_type1_release(void *iommu_data)
		list_del(&domain->next);
		kfree(domain);
		}

		vfio_iommu_iova_free(&iommu->iova_list);

		kfree(iommu);
		}

		@@ -1742,6 +2135,73 @@ static int vfio_domains_have_iommu_cache(struct vfio_iommu *iommu)
		return ret;
		}

		static int vfio_iommu_iova_add_cap(struct vfio_info_cap *caps,
		struct vfio_iommu_type1_info_cap_iova_range *cap_iovas,
		size_t size)
		{
		struct vfio_info_cap_header *header;
		struct vfio_iommu_type1_info_cap_iova_range *iova_cap;

		header = vfio_info_cap_add(caps, size,
		VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE, 1);
		if (IS_ERR(header))
		return PTR_ERR(header);

		iova_cap = container_of(header,
		struct vfio_iommu_type1_info_cap_iova_range,
		header);
		iova_cap->nr_iovas = cap_iovas->nr_iovas;
		memcpy(iova_cap->iova_ranges, cap_iovas->iova_ranges,
		cap_iovas->nr_iovas * sizeof(*cap_iovas->iova_ranges));
		return 0;
		}

		static int vfio_iommu_iova_build_caps(struct vfio_iommu *iommu,
		struct vfio_info_cap *caps)
		{
		struct vfio_iommu_type1_info_cap_iova_range *cap_iovas;
		struct vfio_iova *iova;
		size_t size;
		int iovas = 0, i = 0, ret;

		mutex_lock(&iommu->lock);

		list_for_each_entry(iova, &iommu->iova_list, list)
		iovas++;

		if (!iovas) {
		/*
		* Return 0 as a container with a single mdev device
		* will have an empty list
		*/
		ret = 0;
		goto out_unlock;
		}

		size = sizeof(cap_iovas) + (iovas sizeof(*cap_iovas->iova_ranges));

		cap_iovas = kzalloc(size, GFP_KERNEL);
		if (!cap_iovas) {
		ret = -ENOMEM;
		goto out_unlock;
		}

		cap_iovas->nr_iovas = iovas;

		list_for_each_entry(iova, &iommu->iova_list, list) {
		cap_iovas->iova_ranges[i].start = iova->start;
		cap_iovas->iova_ranges[i].end = iova->end;
		i++;
		}

		ret = vfio_iommu_iova_add_cap(caps, cap_iovas, size);

		kfree(cap_iovas);
		out_unlock:
		mutex_unlock(&iommu->lock);
		return ret;
		}

		static long vfio_iommu_type1_ioctl(void *iommu_data,
		unsigned int cmd, unsigned long arg)
		{
		@@ -1763,19 +2223,53 @@ static long vfio_iommu_type1_ioctl(void *iommu_data,
		}
		} else if (cmd == VFIO_IOMMU_GET_INFO) {
		struct vfio_iommu_type1_info info;
		struct vfio_info_cap caps = { .buf = NULL, .size = 0 };
		unsigned long capsz;
		int ret;

		minsz = offsetofend(struct vfio_iommu_type1_info, iova_pgsizes);

		/* For backward compatibility, cannot require this */
		capsz = offsetofend(struct vfio_iommu_type1_info, cap_offset);

		if (copy_from_user(&info, (void __user *)arg, minsz))
		return -EFAULT;

		if (info.argsz < minsz)
		return -EINVAL;

		if (info.argsz >= capsz) {
		minsz = capsz;
		info.cap_offset = 0; /* output, no-recopy necessary */
		}

		info.flags = VFIO_IOMMU_INFO_PGSIZES;

		info.iova_pgsizes = vfio_pgsize_bitmap(iommu);

		ret = vfio_iommu_iova_build_caps(iommu, &caps);
		if (ret)
		return ret;

		if (caps.size) {
		info.flags \|= VFIO_IOMMU_INFO_CAPS;

		if (info.argsz < sizeof(info) + caps.size) {
		info.argsz = sizeof(info) + caps.size;
		} else {
		vfio_info_cap_shift(&caps, sizeof(info));
		if (copy_to_user((void __user *)arg +
		sizeof(info), caps.buf,
		caps.size)) {
		kfree(caps.buf);
		return -EFAULT;
		}
		info.cap_offset = sizeof(info);
		}

		kfree(caps.buf);
		}

		return copy_to_user((void __user *)arg, &info, minsz) ?
		-EFAULT : 0;

include/uapi/linux/vfio.h

+51 −20

Original line number	Diff line number	Diff line
		@@ -295,15 +295,38 @@ struct vfio_region_info_cap_type {
		__u32 subtype; /* type specific */
		};

		/*
		* List of region types, global per bus driver.
		* If you introduce a new type, please add it here.
		*/

		/* PCI region type containing a PCI vendor part */
		#define VFIO_REGION_TYPE_PCI_VENDOR_TYPE (1 << 31)
		#define VFIO_REGION_TYPE_PCI_VENDOR_MASK (0xffff)
		#define VFIO_REGION_TYPE_GFX (1)
		#define VFIO_REGION_TYPE_CCW (2)

		/* sub-types for VFIO_REGION_TYPE_PCI_* */

		/* 8086 Vendor sub-types */
		/* 8086 vendor PCI sub-types */
		#define VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION (1)
		#define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG (2)
		#define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3)

		#define VFIO_REGION_TYPE_GFX (1)
		/* 10de vendor PCI sub-types */
		/*
		* NVIDIA GPU NVlink2 RAM is coherent RAM mapped onto the host address space.
		*/
		#define VFIO_REGION_SUBTYPE_NVIDIA_NVLINK2_RAM (1)

		/* 1014 vendor PCI sub-types */
		/*
		* IBM NPU NVlink2 ATSD (Address Translation Shootdown) register of NPU
		* to do TLB invalidation on a GPU.
		*/
		#define VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD (1)

		/* sub-types for VFIO_REGION_TYPE_GFX */
		#define VFIO_REGION_SUBTYPE_GFX_EDID (1)

		/**
		@@ -353,25 +376,9 @@ struct vfio_region_gfx_edid {
		#define VFIO_DEVICE_GFX_LINK_STATE_DOWN 2
		};

		#define VFIO_REGION_TYPE_CCW (2)
		/* ccw sub-types */
		/* sub-types for VFIO_REGION_TYPE_CCW */
		#define VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD (1)

		/*
		* 10de vendor sub-type
		*
		* NVIDIA GPU NVlink2 RAM is coherent RAM mapped onto the host address space.
		*/
		#define VFIO_REGION_SUBTYPE_NVIDIA_NVLINK2_RAM (1)

		/*
		* 1014 vendor sub-type
		*
		* IBM NPU NVlink2 ATSD (Address Translation Shootdown) register of NPU
		* to do TLB invalidation on a GPU.
		*/
		#define VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD (1)

		/*
		* The MSIX mappable capability informs that MSIX data of a BAR can be mmapped
		* which allows direct access to non-MSIX registers which happened to be within
		@@ -714,7 +721,31 @@ struct vfio_iommu_type1_info {
		__u32 argsz;
		__u32 flags;
		#define VFIO_IOMMU_INFO_PGSIZES (1 << 0) /* supported page sizes info */
		#define VFIO_IOMMU_INFO_CAPS (1 << 1) /* Info supports caps */
		__u64 iova_pgsizes; /* Bitmap of supported page sizes */
		__u32 cap_offset; /* Offset within info struct of first cap */
		};

		/*
		* The IOVA capability allows to report the valid IOVA range(s)
		* excluding any non-relaxable reserved regions exposed by
		* devices attached to the container. Any DMA map attempt
		* outside the valid iova range will return error.
		*
		* The structures below define version 1 of this capability.
		*/
		#define VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE 1

		struct vfio_iova_range {
		__u64 start;
		__u64 end;
		};

		struct vfio_iommu_type1_info_cap_iova_range {
		struct vfio_info_cap_header header;
		__u32 nr_iovas;
		__u32 reserved;
		struct vfio_iova_range iova_ranges[];
		};

		#define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)

samples/vfio-mdev/mtty.c

+8 −31

Original line number	Diff line number	Diff line
		@@ -152,20 +152,9 @@ static const struct file_operations vd_fops = {

		/* function prototypes */

		static int mtty_trigger_interrupt(const guid_t *uuid);
		static int mtty_trigger_interrupt(struct mdev_state *mdev_state);

		/* Helper functions */
		static struct mdev_state find_mdev_state_by_uuid(const guid_t uuid)
		{
		struct mdev_state *mds;

		list_for_each_entry(mds, &mdev_devices_list, next) {
		if (guid_equal(mdev_uuid(mds->mdev), uuid))
		return mds;
		}

		return NULL;
		}

		static void dump_buffer(u8 *buf, uint32_t count)
		{
		@@ -337,8 +326,7 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
		pr_err("Serial port %d: Fifo level trigger\n",
		index);
		#endif
		mtty_trigger_interrupt(
		mdev_uuid(mdev_state->mdev));
		mtty_trigger_interrupt(mdev_state);
		}
		} else {
		#if defined(DEBUG_INTR)
		@@ -352,8 +340,7 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
		*/
		if (mdev_state->s[index].uart_reg[UART_IER] &
		UART_IER_RLSI)
		mtty_trigger_interrupt(
		mdev_uuid(mdev_state->mdev));
		mtty_trigger_interrupt(mdev_state);
		}
		mutex_unlock(&mdev_state->rxtx_lock);
		break;
		@@ -372,8 +359,7 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
		pr_err("Serial port %d: IER_THRI write\n",
		index);
		#endif
		mtty_trigger_interrupt(
		mdev_uuid(mdev_state->mdev));
		mtty_trigger_interrupt(mdev_state);
		}

		mutex_unlock(&mdev_state->rxtx_lock);
		@@ -444,7 +430,7 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
		#if defined(DEBUG_INTR)
		pr_err("Serial port %d: MCR_OUT2 write\n", index);
		#endif
		mtty_trigger_interrupt(mdev_uuid(mdev_state->mdev));
		mtty_trigger_interrupt(mdev_state);
		}

		if ((mdev_state->s[index].uart_reg[UART_IER] & UART_IER_MSI) &&
		@@ -452,7 +438,7 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
		#if defined(DEBUG_INTR)
		pr_err("Serial port %d: MCR RTS/DTR write\n", index);
		#endif
		mtty_trigger_interrupt(mdev_uuid(mdev_state->mdev));
		mtty_trigger_interrupt(mdev_state);
		}
		break;

		@@ -503,8 +489,7 @@ static void handle_bar_read(unsigned int index, struct mdev_state *mdev_state,
		#endif
		if (mdev_state->s[index].uart_reg[UART_IER] &
		UART_IER_THRI)
		mtty_trigger_interrupt(
		mdev_uuid(mdev_state->mdev));
		mtty_trigger_interrupt(mdev_state);
		}
		mutex_unlock(&mdev_state->rxtx_lock);

		@@ -1028,17 +1013,9 @@ static int mtty_set_irqs(struct mdev_device *mdev, uint32_t flags,
		return ret;
		}

		static int mtty_trigger_interrupt(const guid_t *uuid)
		static int mtty_trigger_interrupt(struct mdev_state *mdev_state)
		{
		int ret = -1;
		struct mdev_state *mdev_state;

		mdev_state = find_mdev_state_by_uuid(uuid);

		if (!mdev_state) {
		pr_info("%s: mdev not found\n", __func__);
		return -EINVAL;
		}

		if ((mdev_state->irq_index == VFIO_PCI_MSI_IRQ_INDEX) &&
		(!mdev_state->msi_evtfd))

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