diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2018-07-14 15:46:58 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-07-20 14:44:24 +0200 |
| commit | 85319dcc8955f8f31828dc8bafff29f6aa011d93 (patch) | |
| tree | 83b5de3dfe789b170a7e6b4f5fc377f89c60b028 | |
| parent | 9ddbfb42138d84bb326023616c40a3dc30ea2837 (diff) | |
iommu/vt-d: Add for_each_device_domain() helper
This adds a helper named for_each_device_domain() to iterate
over the elements in device_domain_list and invoke a callback
against each element. This allows to search the device_domain
list in other source files.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 21 | ||||
| -rw-r--r-- | include/linux/intel-iommu.h | 2 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index bb7f2b2a37ee..f020da439ace 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -448,6 +448,27 @@ EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped); static DEFINE_SPINLOCK(device_domain_lock); static LIST_HEAD(device_domain_list); +/* + * Iterate over elements in device_domain_list and call the specified + * callback @fn against each element. This helper should only be used + * in the context where the device_domain_lock has already been holden. + */ +int for_each_device_domain(int (*fn)(struct device_domain_info *info, + void *data), void *data) +{ + int ret = 0; + struct device_domain_info *info; + + assert_spin_locked(&device_domain_lock); + list_for_each_entry(info, &device_domain_list, global) { + ret = fn(info, data); + if (ret) + return ret; + } + + return 0; +} + const struct iommu_ops intel_iommu_ops; static bool translation_pre_enabled(struct intel_iommu *iommu) diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 2e1fbde020ca..4fd4c6fee93e 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -520,6 +520,8 @@ struct dmar_domain *get_valid_domain_for_dev(struct device *dev); void *alloc_pgtable_page(int node); void free_pgtable_page(void *vaddr); struct intel_iommu *domain_get_iommu(struct dmar_domain *domain); +int for_each_device_domain(int (*fn)(struct device_domain_info *info, + void *data), void *data); #ifdef CONFIG_INTEL_IOMMU_SVM extern int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu); |