diff options
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index eaf825ac7d28..a27d6cb1a793 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3868,6 +3868,14 @@ static int device_notifier(struct notifier_block *nb, if (action != BUS_NOTIFY_REMOVED_DEVICE) return 0; + /* + * If the device is still attached to a device driver we can't + * tear down the domain yet as DMA mappings may still be in use. + * Wait for the BUS_NOTIFY_UNBOUND_DRIVER event to do that. + */ + if (action == BUS_NOTIFY_DEL_DEVICE && dev->driver != NULL) + return 0; + domain = find_domain(dev); if (!domain) return 0; @@ -4406,17 +4414,14 @@ static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, return phys; } -static int intel_iommu_domain_has_cap(struct iommu_domain *domain, - unsigned long cap) +static bool intel_iommu_capable(enum iommu_cap cap) { - struct dmar_domain *dmar_domain = domain->priv; - if (cap == IOMMU_CAP_CACHE_COHERENCY) - return dmar_domain->iommu_snooping; + return domain_update_iommu_snooping(NULL) == 1; if (cap == IOMMU_CAP_INTR_REMAP) - return irq_remapping_enabled; + return irq_remapping_enabled == 1; - return 0; + return false; } static int intel_iommu_add_device(struct device *dev) @@ -4455,6 +4460,7 @@ static void intel_iommu_remove_device(struct device *dev) } static const struct iommu_ops intel_iommu_ops = { + .capable = intel_iommu_capable, .domain_init = intel_iommu_domain_init, .domain_destroy = intel_iommu_domain_destroy, .attach_dev = intel_iommu_attach_device, @@ -4462,7 +4468,6 @@ static const struct iommu_ops intel_iommu_ops = { .map = intel_iommu_map, .unmap = intel_iommu_unmap, .iova_to_phys = intel_iommu_iova_to_phys, - .domain_has_cap = intel_iommu_domain_has_cap, .add_device = intel_iommu_add_device, .remove_device = intel_iommu_remove_device, .pgsize_bitmap = INTEL_IOMMU_PGSIZES, |