mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
18b3af4492
A change made in the final version of IOMMU debugfs support replaced the
public function iommu_debugfs_new_driver_dir() by the public dentry
iommu_debugfs_dir in <linux/iommu.h>, but forgot to update both the
implementation in iommu-debugfs.c, and the patch description.
Fix this by exporting iommu_debugfs_dir, and removing the reference to
and implementation of iommu_debugfs_new_driver_dir().
Fixes: bad614b242 ("iommu: Enable debugfs exposure of IOMMU driver internals")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* IOMMU debugfs core infrastructure
|
|
*
|
|
* Copyright (C) 2018 Advanced Micro Devices, Inc.
|
|
*
|
|
* Author: Gary R Hook <gary.hook@amd.com>
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/iommu.h>
|
|
#include <linux/debugfs.h>
|
|
|
|
struct dentry *iommu_debugfs_dir;
|
|
EXPORT_SYMBOL_GPL(iommu_debugfs_dir);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
if (!iommu_debugfs_dir) {
|
|
iommu_debugfs_dir = debugfs_create_dir("iommu", NULL);
|
|
pr_warn("\n");
|
|
pr_warn("*************************************************************\n");
|
|
pr_warn("** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **\n");
|
|
pr_warn("** **\n");
|
|
pr_warn("** IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL **\n");
|
|
pr_warn("** **\n");
|
|
pr_warn("** This means that this kernel is built to expose internal **\n");
|
|
pr_warn("** IOMMU data structures, which may compromise security on **\n");
|
|
pr_warn("** your system. **\n");
|
|
pr_warn("** **\n");
|
|
pr_warn("** If you see this message and you are not debugging the **\n");
|
|
pr_warn("** kernel, report this immediately to your vendor! **\n");
|
|
pr_warn("** **\n");
|
|
pr_warn("** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **\n");
|
|
pr_warn("*************************************************************\n");
|
|
}
|
|
}
|