linux/drivers/iommu/iommu-debugfs.c

// SPDX-License-Identifier: GPL-2.0
/*
 * IOMMU debugfs core infrastructure
 *
 * Copyright (C) 2018 Advanced Micro Devices, Inc.
 *
 * Author: Gary R Hook <[email protected]>
 */

#include <linux/pci.h>
#include <linux/iommu.h>
#include <linux/debugfs.h>

struct dentry *iommu_debugfs_dir;
EXPORT_SYMBOL_GPL(…);

/**
 * iommu_debugfs_setup - create the top-level iommu directory in debugfs
 *
 * Provide base enablement for using debugfs to expose internal data of an
 * IOMMU driver. When called, this function creates the
 * /sys/kernel/debug/iommu directory.
 *
 * Emit a strong warning at boot time to indicate that this feature is
 * enabled.
 *
 * This function is called from iommu_init; drivers may then use
 * iommu_debugfs_dir to instantiate a vendor-specific directory to be used
 * to expose internal data.
 */
void iommu_debugfs_setup(void)
{ … }