Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

2 files changed, 443 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-class-firmware b/Documentation/ABI/testing/sysfs-class-firmware
new file mode 100644
index 000000000..978d3d500
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-firmware
@@ -0,0 +1,77 @@
+What: 		/sys/class/firmware/.../data
+Date:		July 2022
+KernelVersion:	5.19
+Contact:	Russ Weight <russell.h.weight@intel.com>
+Description:	The data sysfs file is used for firmware-fallback and for
+		firmware uploads. Cat a firmware image to this sysfs file
+		after you echo 1 to the loading sysfs file. When the firmware
+		image write is complete, echo 0 to the loading sysfs file. This
+		sequence will signal the completion of the firmware write and
+		signal the lower-level driver that the firmware data is
+		available.
+
+What: 		/sys/class/firmware/.../cancel
+Date:		July 2022
+KernelVersion:	5.19
+Contact:	Russ Weight <russell.h.weight@intel.com>
+Description:	Write-only. For firmware uploads, write a "1" to this file to
+		request that the transfer of firmware data to the lower-level
+		device be canceled. This request will be rejected (EBUSY) if
+		the update cannot be canceled (e.g. a FLASH write is in
+		progress) or (ENODEV) if there is no firmware update in progress.
+
+What: 		/sys/class/firmware/.../error
+Date:		July 2022
+KernelVersion:	5.19
+Contact:	Russ Weight <russell.h.weight@intel.com>
+Description:	Read-only. Returns a string describing a failed firmware
+		upload. This string will be in the form of <STATUS>:<ERROR>,
+		where <STATUS> will be one of the status strings described
+		for the status sysfs file and <ERROR> will be one of the
+		following: "hw-error", "timeout", "user-abort", "device-busy",
+		"invalid-file-size", "read-write-error", "flash-wearout". The
+		error sysfs file is only meaningful when the current firmware
+		upload status is "idle". If this file is read while a firmware
+		transfer is in progress, then the read will fail with EBUSY.
+
+What: 		/sys/class/firmware/.../loading
+Date:		July 2022
+KernelVersion:	5.19
+Contact:	Russ Weight <russell.h.weight@intel.com>
+Description:	The loading sysfs file is used for both firmware-fallback and
+		for firmware uploads. Echo 1 onto the loading file to indicate
+		you are writing a firmware file to the data sysfs node. Echo
+		-1 onto this file to abort the data write or echo 0 onto this
+		file to indicate that the write is complete. For firmware
+		uploads, the zero value also triggers the transfer of the
+		firmware data to the lower-level device driver.
+
+What: 		/sys/class/firmware/.../remaining_size
+Date:		July 2022
+KernelVersion:	5.19
+Contact:	Russ Weight <russell.h.weight@intel.com>
+Description:	Read-only. For firmware upload, this file contains the size
+		of the firmware data that remains to be transferred to the
+		lower-level device driver. The size value is initialized to
+		the full size of the firmware image that was previously
+		written to the data sysfs file. This value is periodically
+		updated during the "transferring" phase of the firmware
+		upload.
+		Format: "%u".
+
+What: 		/sys/class/firmware/.../status
+Date:		July 2022
+KernelVersion:	5.19
+Contact:	Russ Weight <russell.h.weight@intel.com>
+Description:	Read-only. Returns a string describing the current status of
+		a firmware upload. The string will be one of the following:
+		idle, "receiving", "preparing", "transferring", "programming".
+
+What: 		/sys/class/firmware/.../timeout
+Date:		July 2022
+KernelVersion:	5.19
+Contact:	Russ Weight <russell.h.weight@intel.com>
+Description:	This file supports the timeout mechanism for firmware
+		fallback.  This file has no affect on firmware uploads. For
+		more information on timeouts please see the documentation
+		for firmware fallback.
diff --git a/Documentation/ABI/testing/sysfs-class-firmware-attributes b/Documentation/ABI/testing/sysfs-class-firmware-attributes
new file mode 100644
index 000000000..4cdba3477
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-firmware-attributes
@@ -0,0 +1,366 @@
+What:		/sys/class/firmware-attributes/*/attributes/*/
+Date:		February 2021
+KernelVersion:	5.11
+Contact:	Divya Bharathi <Divya.Bharathi@Dell.com>,
+		Prasanth KSR <prasanth.ksr@dell.com>
+		Dell.Client.Kernel@dell.com
+Description:
+		A sysfs interface for systems management software to enable
+		configuration capability on supported systems.  This directory
+		exposes interfaces for interacting with configuration options.
+
+		Unless otherwise specified in an attribute description all attributes are optional
+		and will accept UTF-8 input.
+
+		type:
+		    A file that can be read to obtain the type of attribute.
+		    This attribute is mandatory.
+
+		The following are known types:
+
+			- enumeration: a set of pre-defined valid values
+			- integer: a range of numerical values
+			- string
+
+		All attribute types support the following values:
+
+		current_value:
+				A file that can be read to obtain the current
+				value of the <attr>.
+
+				This file can also be written to in order to update the value of a
+				<attr>
+
+				This attribute is mandatory.
+
+		default_value:
+				A file that can be read to obtain the default
+				value of the <attr>
+
+		display_name:
+				A file that can be read to obtain a user friendly
+				description of the at <attr>
+
+		display_name_language_code:
+						A file that can be read to obtain
+						the IETF language tag corresponding to the
+						"display_name" of the <attr>
+
+		"enumeration"-type specific properties:
+
+		possible_values:
+					A file that can be read to obtain the possible
+					values of the <attr>. Values are separated using
+					semi-colon (``;``).
+
+		"integer"-type specific properties:
+
+		min_value:
+				A file that can be read to obtain the lower
+				bound value of the <attr>
+
+		max_value:
+				A file that can be read to obtain the upper
+				bound value of the <attr>
+
+		scalar_increment:
+					A file that can be read to obtain the scalar value used for
+					increments of current_value this attribute accepts.
+
+		"string"-type specific properties:
+
+		max_length:
+				A file that can be read to obtain the maximum
+				length value of the <attr>
+
+		min_length:
+				A file that can be read to obtain the minimum
+				length value of the <attr>
+
+		Dell specific class extensions
+		------------------------------
+
+		On Dell systems the following additional attributes are available:
+
+		dell_modifier:
+				A file that can be read to obtain attribute-level
+				dependency rule. It says an attribute X will become read-only or
+				suppressed, if/if-not attribute Y is configured.
+
+				modifier rules can be in following format::
+
+				    [ReadOnlyIf:<attribute>=<value>]
+				    [ReadOnlyIfNot:<attribute>=<value>]
+				    [SuppressIf:<attribute>=<value>]
+				    [SuppressIfNot:<attribute>=<value>]
+
+				For example::
+
+				    AutoOnFri/dell_modifier has value,
+					    [SuppressIfNot:AutoOn=SelectDays]
+
+				This means AutoOnFri will be suppressed in BIOS setup if AutoOn
+				attribute is not "SelectDays" and its value will not be effective
+				through sysfs until this rule is met.
+
+		Enumeration attributes also support the following:
+
+		dell_value_modifier:
+					A file that can be read to obtain value-level dependency.
+					This file is similar to dell_modifier but here,	an
+					attribute's current value will be forcefully changed based
+					dependent attributes value.
+
+					dell_value_modifier rules can be in following format::
+
+					    <value>[ForceIf:<attribute>=<value>]
+					    <value>[ForceIfNot:<attribute>=<value>]
+
+					For example::
+
+					    LegacyOrom/dell_value_modifier has value:
+						    Disabled[ForceIf:SecureBoot=Enabled]
+
+					This means LegacyOrom's current value will be forced to
+					"Disabled" in BIOS setup if SecureBoot is Enabled and its
+					value will not be effective through sysfs until this rule is
+					met.
+
+What:		/sys/class/firmware-attributes/*/authentication/
+Date:		February 2021
+KernelVersion:	5.11
+Contact:	Divya Bharathi <Divya.Bharathi@Dell.com>,
+		Prasanth KSR <prasanth.ksr@dell.com>
+		Dell.Client.Kernel@dell.com
+Description:
+		Devices support various authentication mechanisms which can be exposed
+		as a separate configuration object.
+
+		For example a "BIOS Admin" password and "System" Password can be set,
+		reset or cleared using these attributes.
+
+		- An "Admin" password is used for preventing modification to the BIOS
+		  settings.
+		- A "System" password is required to boot a machine.
+
+		Change in any of these two authentication methods will also generate an
+		uevent KOBJ_CHANGE.
+
+		is_enabled:
+					A file that can be read to obtain a 0/1 flag to see if
+					<attr> authentication is enabled.
+					This attribute is mandatory.
+
+		role:
+					The type of authentication used.
+					This attribute is mandatory.
+
+					Known types:
+						bios-admin:
+							Representing BIOS administrator password
+						power-on:
+							Representing a password required to use
+							the system
+						system-mgmt:
+							Representing System Management password.
+							See Lenovo extensions section for details
+						HDD:
+							Representing HDD password
+							See Lenovo extensions section for details
+						NVMe:
+							Representing NVMe password
+							See Lenovo extensions section for details
+
+		mechanism:
+					The means of authentication.  This attribute is mandatory.
+					Only supported type currently is "password".
+
+		max_password_length:
+					A file that can be read to obtain the
+					maximum length of the Password
+
+		min_password_length:
+					A file that can be read to obtain the
+					minimum length of the Password
+
+		current_password:
+					A write only value used for privileged access such as
+					setting	attributes when a system or admin password is set
+					or resetting to a new password
+
+					This attribute is mandatory when mechanism == "password".
+
+		new_password:
+					A write only value that when used in tandem with
+					current_password will reset a system or admin password.
+
+		Note, password management is session specific. If Admin password is set,
+		same password must be written into current_password file (required for
+		password-validation) and must be cleared once the session is over.
+		For example::
+
+			echo "password" > current_password
+			echo "disabled" > TouchScreen/current_value
+			echo "" > current_password
+
+		Drivers may emit a CHANGE uevent when a password is set or unset
+		userspace may check it again.
+
+		On Dell and Lenovo systems, if Admin password is set, then all BIOS attributes
+		require password validation.
+		On Lenovo systems if you change the Admin password the new password is not active until
+		the next boot.
+
+		Lenovo specific class extensions
+		--------------------------------
+
+		On Lenovo systems the following additional settings are available:
+
+		role: system-mgmt	This gives the same authority as the bios-admin password to control
+					security related features. The authorities allocated can be set via
+					the BIOS menu SMP Access Control Policy
+
+		role: HDD & NVMe	This password is used to unlock access to the drive at boot. Note see
+					'level' and 'index' extensions below.
+
+		lenovo_encoding:
+					The encoding method that is used. This can be either "ascii"
+					or "scancode". Default is set to "ascii"
+
+		lenovo_kbdlang:
+					The keyboard language method that is used. This is generally a
+					two char code (e.g. "us", "fr", "gr") and may vary per platform.
+					Default is set to "us"
+
+		level:
+					Available for HDD and NVMe authentication to set 'user' or 'master'
+					privilege level.
+					If only the user password is configured then this should be used to
+					unlock the drive at boot. If both master and user passwords are set
+					then either can be used. If a master password is set a user password
+					is required.
+					This attribute defaults to 'user' level
+
+		index:
+					Used with HDD and NVME authentication to set the drive index
+					that is being referenced (e.g hdd0, hdd1 etc)
+					This attribute defaults to device 0.
+
+		certificate, signature, save_signature:
+					These attributes are used for certificate based authentication. This is
+					used in conjunction with a signing server as an alternative to password
+					based authentication.
+					The user writes to the attribute(s) with a BASE64 encoded string obtained
+					from the signing server.
+					The attributes can be displayed to check the stored value.
+
+					Some usage examples:
+
+						Installing a certificate to enable feature::
+
+							echo "supervisor password" > authentication/Admin/current_password
+							echo "signed certificate" > authentication/Admin/certificate
+
+						Updating the installed certificate::
+
+							echo "signature" > authentication/Admin/signature
+							echo "signed certificate" > authentication/Admin/certificate
+
+						Removing the installed certificate::
+
+							echo "signature" > authentication/Admin/signature
+							echo "" > authentication/Admin/certificate
+
+						Changing a BIOS setting::
+
+							echo "signature" > authentication/Admin/signature
+							echo "save signature" > authentication/Admin/save_signature
+							echo Enable > attribute/PasswordBeep/current_value
+
+					You cannot enable certificate authentication if a supervisor password
+					has not been set.
+					Clearing the certificate results in no bios-admin authentication method
+					being configured allowing anyone to make changes.
+					After any of these operations the system must reboot for the changes to
+					take effect.
+
+		certificate_thumbprint:
+					Read only attribute used to display the MD5, SHA1 and SHA256 thumbprints
+					for the certificate installed in the BIOS.
+
+		certificate_to_password:
+					Write only attribute used to switch from certificate based authentication
+					back to password based.
+					Usage::
+
+						echo "signature" > authentication/Admin/signature
+						echo "password" > authentication/Admin/certificate_to_password
+
+
+What:		/sys/class/firmware-attributes/*/attributes/pending_reboot
+Date:		February 2021
+KernelVersion:	5.11
+Contact:	Divya Bharathi <Divya.Bharathi@Dell.com>,
+		Prasanth KSR <prasanth.ksr@dell.com>
+		Dell.Client.Kernel@dell.com
+Description:
+		A read-only attribute reads 1 if a reboot is necessary to apply
+		pending BIOS attribute changes. Also, an uevent_KOBJ_CHANGE is
+		generated when it changes to 1.
+
+			==	=========================================
+			0	All BIOS attributes setting are current
+			1	A reboot is necessary to get pending BIOS
+			        attribute changes applied
+			==	=========================================
+
+		Note, userspace applications need to follow below steps for efficient
+		BIOS management,
+
+		1.	Check if admin password is set. If yes, follow session method for
+			password management as briefed under authentication section above.
+		2.	Before setting any attribute, check if it has any modifiers
+			or value_modifiers. If yes, incorporate them and then modify
+			attribute.
+
+		Drivers may emit a CHANGE uevent when this value changes and userspace
+		may check it again.
+
+What:		/sys/class/firmware-attributes/*/attributes/reset_bios
+Date:		February 2021
+KernelVersion:	5.11
+Contact:	Divya Bharathi <Divya.Bharathi@Dell.com>,
+		Prasanth KSR <prasanth.ksr@dell.com>
+		Dell.Client.Kernel@dell.com
+Description:
+		This attribute can be used to reset the BIOS Configuration.
+		Specifically, it tells which type of reset BIOS configuration is being
+		requested on the host.
+
+		Reading from it returns a list of supported options encoded as:
+
+			- 'builtinsafe' (Built in safe configuration profile)
+			- 'lastknowngood' (Last known good saved configuration profile)
+			- 'factory' (Default factory settings configuration profile)
+			- 'custom' (Custom saved configuration profile)
+
+		The currently selected option is printed in square brackets as
+		shown below::
+
+		    # echo "factory" > /sys/class/firmware-attributes/*/device/attributes/reset_bios
+		    # cat /sys/class/firmware-attributes/*/device/attributes/reset_bios
+		    builtinsafe lastknowngood [factory] custom
+
+		Note that any changes to this attribute requires a reboot
+		for changes to take effect.
+
+What:		/sys/class/firmware-attributes/*/attributes/debug_cmd
+Date:		July 2021
+KernelVersion:	5.14
+Contact:	Mark Pearson <markpearson@lenovo.com>
+Description:
+		This write only attribute can be used to send debug commands to the BIOS.
+		This should only be used when recommended by the BIOS vendor. Vendors may
+		use it to enable extra debug attributes or BIOS features for testing purposes.
+
+		Note that any changes to this attribute requires a reboot for changes to take effect.