This allocates a domain for the mediated device if it is able to be isolated and protected individually by IOMMU.
Cc: Ashok Raj <[email protected]> Cc: Jacob Pan <[email protected]> Cc: Kevin Tian <[email protected]> Cc: Liu Yi L <[email protected]> Signed-off-by: Sanjay Kumar <[email protected]> Signed-off-by: Lu Baolu <[email protected]> --- drivers/vfio/vfio_iommu_type1.c | 43 ++++++++++++++++++++++++++++++----------- 1 file changed, 32 insertions(+), 11 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 3e5b177..496bea6 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -1177,6 +1177,22 @@ static int vfio_bus_type(struct device *dev, void *data) return 0; } +static int mdev_private_domain(struct device *dev, void *data) +{ + enum mdev_domain_type type; + enum mdev_domain_type (*fn)(struct device *dev); + + fn = symbol_get(mdev_get_domain_type); + if (fn) { + type = fn(dev); + symbol_put(mdev_get_domain_type); + + return type != DOMAIN_TYPE_PRIVATE; + } + + return -EINVAL; +} + static int vfio_iommu_replay(struct vfio_iommu *iommu, struct vfio_domain *domain) { @@ -1371,18 +1387,23 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, mdev_bus = symbol_get(mdev_bus_type); if (mdev_bus) { - if ((bus == mdev_bus) && !iommu_present(bus)) { - symbol_put(mdev_bus_type); - if (!iommu->external_domain) { - INIT_LIST_HEAD(&domain->group_list); - iommu->external_domain = domain; - } else - kfree(domain); + if (bus == mdev_bus) { + ret = iommu_group_for_each_dev(iommu_group, NULL, + mdev_private_domain); + if (!iommu_present(bus) || ret) { + symbol_put(mdev_bus_type); + if (!iommu->external_domain) { + INIT_LIST_HEAD(&domain->group_list); + iommu->external_domain = domain; + } else { + kfree(domain); + } - list_add(&group->next, - &iommu->external_domain->group_list); - mutex_unlock(&iommu->lock); - return 0; + list_add(&group->next, + &iommu->external_domain->group_list); + mutex_unlock(&iommu->lock); + return 0; + } } symbol_put(mdev_bus_type); } -- 2.7.4 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
