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docs: filesystems: sysfs: add remaining top level sysfs directory descriptions

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Finish top level sysfs directory descriptions for block, class, firmware,
hypervisor, kernel, and power. Did not write one for net directory. See
commit bc3a88431672 ("docs: filesystems: sysfs: remove top level sysfs net
 directory")

Signed-off-by: Alex Tran <alex.t.tran@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250902023039.1351270-1-alex.t.tran@gmail.com>
This commit is contained in:
Alex Tran
2025-09-01 19:30:37 -07:00
committed by Jonathan Corbet
parent 63e6e9dde2
commit a3d13ec44a
1 changed files with 15 additions and 1 deletions
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16
Documentation/filesystems/sysfs.rst
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@@ -334,8 +334,22 @@ a stat(2) operation.
More information on driver-model specific features can be found in
Documentation/driver-api/driver-model/.
block/ contains symlinks to all the block devices discovered on the system.
These symlinks point to directories under /sys/devices.
TODO: Finish this section.
class/ contains a directory for each device class, grouped by functional type.
Each directory in class/ contains symlinks to devices in the /sys/devices directory.
firmware/ contains system firmware data and configuration such as firmware tables,
ACPI information, and device tree data.
hypervisor/ contains virtualization platform information and provides an interface to
the underlying hypervisor. It is only present when running on a virtual machine.
kernel/ contains runtime kernel parameters, configuration settings, and status.
power/ contains power management subsystem information including
sleep states, suspend/resume capabilities, and policies.
Current Interfaces