cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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debugfs.c (746B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * AMD IOMMU driver
      4 *
      5 * Copyright (C) 2018 Advanced Micro Devices, Inc.
      6 *
      7 * Author: Gary R Hook <gary.hook@amd.com>
      8 */
      9
     10#include <linux/debugfs.h>
     11#include <linux/pci.h>
     12
     13#include "amd_iommu.h"
     14
     15static struct dentry *amd_iommu_debugfs;
     16static DEFINE_MUTEX(amd_iommu_debugfs_lock);
     17
     18#define	MAX_NAME_LEN	20
     19
     20void amd_iommu_debugfs_setup(struct amd_iommu *iommu)
     21{
     22	char name[MAX_NAME_LEN + 1];
     23
     24	mutex_lock(&amd_iommu_debugfs_lock);
     25	if (!amd_iommu_debugfs)
     26		amd_iommu_debugfs = debugfs_create_dir("amd",
     27						       iommu_debugfs_dir);
     28	mutex_unlock(&amd_iommu_debugfs_lock);
     29
     30	snprintf(name, MAX_NAME_LEN, "iommu%02d", iommu->index);
     31	iommu->debugfs = debugfs_create_dir(name, amd_iommu_debugfs);
     32}