• Gary R Hook's avatar
    iommu: Enable debugfs exposure of IOMMU driver internals · bad614b2
    Gary R Hook authored
    Provide base enablement for using debugfs to expose internal data of an
    IOMMU driver. When called, create 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, and creates the initial DebugFS
    directory. Drivers may then call iommu_debugfs_new_driver_dir() to
    instantiate a device-specific directory to expose internal data.
    It will return a pointer to the new dentry structure created in
    /sys/kernel/debug/iommu, or NULL in the event of a failure.
    
    Since the IOMMU driver can not be removed from the running system, there
    is no need for an "off" function.
    Signed-off-by: default avatarGary R Hook <gary.hook@amd.com>
    Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
    bad614b2
iommu-debugfs.c 2.53 KB