From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/iommu/amd/debugfs.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 drivers/iommu/amd/debugfs.c (limited to 'drivers/iommu/amd/debugfs.c') diff --git a/drivers/iommu/amd/debugfs.c b/drivers/iommu/amd/debugfs.c new file mode 100644 index 000000000..545372fcc --- /dev/null +++ b/drivers/iommu/amd/debugfs.c @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * AMD IOMMU driver + * + * Copyright (C) 2018 Advanced Micro Devices, Inc. + * + * Author: Gary R Hook + */ + +#include +#include + +#include "amd_iommu.h" + +static struct dentry *amd_iommu_debugfs; +static DEFINE_MUTEX(amd_iommu_debugfs_lock); + +#define MAX_NAME_LEN 20 + +void amd_iommu_debugfs_setup(struct amd_iommu *iommu) +{ + char name[MAX_NAME_LEN + 1]; + + mutex_lock(&amd_iommu_debugfs_lock); + if (!amd_iommu_debugfs) + amd_iommu_debugfs = debugfs_create_dir("amd", + iommu_debugfs_dir); + mutex_unlock(&amd_iommu_debugfs_lock); + + snprintf(name, MAX_NAME_LEN, "iommu%02d", iommu->index); + iommu->debugfs = debugfs_create_dir(name, amd_iommu_debugfs); +} -- cgit v1.2.3