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Commit 85319dcc authored by Lu Baolu's avatar Lu Baolu Committed by Joerg Roedel
Browse files

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: default avatarLu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: default avatarLiu Yi L <yi.l.liu@intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 9ddbfb42

drivers/iommu/intel-iommu.c

+21 −0
Original line number Diff line number Diff line
@@ -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)

include/linux/intel-iommu.h

+2 −0
Original line number Diff line number Diff line
@@ -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);