merge android-mainline into android-mainline-rust

Change-Id: I9ce984df038293d6db35bf0d9494bb501d182a01
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>

Author: jeffvanderstoep

Documentation/ABI/stable/sysfs-block

@@ -432,7 +432,8 @@ Contact:	linux-block@vger.kernel.org
 Description:
 		[RW] This is the maximum number of kilobytes that the block
 		layer will allow for a filesystem request. Must be smaller than
-		or equal to the maximum size allowed by the hardware.
+		or equal to the maximum size allowed by the hardware. Write 0
+		to use default kernel settings.
 
 
 What:		/sys/block/<disk>/queue/max_segment_size

Documentation/ABI/stable/sysfs-driver-mlxreg-io

@@ -522,7 +522,6 @@ Description:	These files allow to each of ASICs by writing 1.
 
 		The files are write only.
 
-
 What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/comm_chnl_ready
 Date:		July 2022
 KernelVersion:	5.20
@@ -542,3 +541,124 @@ Description:	The file indicates COME module hardware configuration.
 		The purpose is to expose some minor BOM changes for the same system SKU.
 
 		The file is read only.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_pwr_converter_fail
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak <vadimp@nvidia.com>
+Description:	This file shows the system reset cause due to power converter
+		devices failure.
+		Value 1 in file means this is reset cause, 0 - otherwise.
+
+		The file is read only.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/erot1_ap_reset
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/erot2_ap_reset
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak <vadimp@nvidia.com>
+Description:	These files aim to monitor the status of the External Root of Trust (EROT)
+		processor's RESET output to the Application Processor (AP).
+		By reading this file, could be determined if the EROT has invalidated or
+		revoked AP Firmware, at which point it will hold the AP in RESET until a
+		valid firmware is loaded. This protects the AP from running an
+		unauthorized firmware. In the normal flow, the AP reset should be released
+		after the EROT validates the integrity of the FW, and it should be done so
+		as quickly as possible so that the AP boots before the CPU starts to
+		communicate to each ASIC.
+
+		The files are read only.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/erot1_recovery
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/erot2_recovery
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/erot1_reset
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/erot2_reset
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak <vadimp@nvidia.com>
+Description:	These files aim to perform External Root of Trust (EROT) recovery
+		sequence after EROT device failure.
+		These EROT devices protect ASICs from unauthorized access and in normal
+		flow their reset should be released with system power – earliest power
+		up stage, so that EROTs can begin boot and authentication process before
+		CPU starts to communicate to ASICs.
+		Issuing a reset to the EROT while asserting the recovery signal will cause
+		the EROT Application Processor to enter recovery mode so that the EROT FW
+		can be updated/recovered.
+		For reset/recovery the related file should be toggled by 1/0.
+
+		The files are read/write.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/erot1_wp
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/erot2_wp
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak <vadimp@nvidia.com>
+Description:	These files allow access to External Root of Trust (EROT) for reset
+		and recovery sequence after EROT device failure.
+		Default is 0 (programming disabled).
+		If the system is in locked-down mode writing this file will not be allowed.
+
+		The files are read/write.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/spi_chnl_select
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak <vadimp@nvidia.com>
+Description:	This file allows SPI chip selection for External Root of Trust (EROT)
+		device Out-of-Band recovery.
+		File can be written with 0 or with 1. It selects which EROT can be accessed
+		through SPI device.
+
+		The file is read/write.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/asic_pg_fail
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak vadimp@nvidia.com
+Description:	This file shows ASIC Power Good status.
+		Value 1 in file means ASIC Power Good failed, 0 - otherwise.
+
+		The file is read only.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/clk_brd1_boot_fail
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/clk_brd2_boot_fail
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/clk_brd_fail
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak vadimp@nvidia.com
+Description:	These files are related to clock boards status in system.
+		- clk_brd1_boot_fail: warning about 1-st clock board failed to boot from CI.
+		- clk_brd2_boot_fail: warning about 2-nd clock board failed to boot from CI.
+		- clk_brd_fail: error about common clock board boot failure.
+
+		The files are read only.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/clk_brd_prog_en
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak <vadimp@nvidia.com>
+Description:	This file enables programming of clock boards.
+		Default is 0 (programming disabled).
+		If the system is in locked-down mode writing this file will not be allowed.
+
+		The file is read/write.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/pwr_converter_prog_en
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak <vadimp@nvidia.com>
+Description:	This file enables programming of power converters.
+		Default is 0 (programming disabled).
+		If the system is in locked-down mode writing this file will not be allowed.
+
+		The file is read/write.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_ac_ok_fail
+Date:		February 2023
+KernelVersion:	6.3
+Contact:	Vadim Pasternak <vadimp@nvidia.com>
+Description:	This file shows the system reset cause due to AC power failure.
+		Value 1 in file means this is reset cause, 0 - otherwise.
+
+		The file is read only.

Documentation/ABI/stable/sysfs-hypervisor-xen

@@ -120,3 +120,16 @@ Contact:	xen-devel@lists.xenproject.org
 Description:	If running under Xen:
 		The Xen version is in the format <major>.<minor><extra>
 		This is the <minor> part of it.
+
+What:		/sys/hypervisor/start_flags/*
+Date:		March 2023
+KernelVersion:	6.3.0
+Contact:	xen-devel@lists.xenproject.org
+Description:	If running under Xen:
+		All bits in Xen's start-flags are represented as
+		boolean files, returning '1' if set, '0' otherwise.
+		This takes the place of the defunct /proc/xen/capabilities,
+		which would contain "control_d" on dom0, and be empty
+		otherwise.  This flag is now exposed as "initdomain" in
+		addition to the "privileged" flag; all other possible flags
+		are accessible as "unknownXX".

Documentation/ABI/testing/sysfs-bus-css

@@ -1,22 +1,19 @@
 What:		/sys/bus/css/devices/.../type
 Date:		March 2008
-Contact:	Cornelia Huck <cornelia.huck@de.ibm.com>
-		linux-s390@vger.kernel.org
+Contact:	linux-s390@vger.kernel.org
 Description:	Contains the subchannel type, as reported by the hardware.
 		This attribute is present for all subchannel types.
 
 What:		/sys/bus/css/devices/.../modalias
 Date:		March 2008
-Contact:	Cornelia Huck <cornelia.huck@de.ibm.com>
-		linux-s390@vger.kernel.org
+Contact:	linux-s390@vger.kernel.org
 Description:	Contains the module alias as reported with uevents.
 		It is of the format css:t<type> and present for all
 		subchannel types.
 
 What:		/sys/bus/css/drivers/io_subchannel/.../chpids
 Date:		December 2002
-Contact:	Cornelia Huck <cornelia.huck@de.ibm.com>
-		linux-s390@vger.kernel.org
+Contact:	linux-s390@vger.kernel.org
 Description:	Contains the ids of the channel paths used by this
 		subchannel, as reported by the channel subsystem
 		during subchannel recognition.
@@ -26,8 +23,7 @@ Users:		s390-tools, HAL
 
 What:		/sys/bus/css/drivers/io_subchannel/.../pimpampom
 Date:		December 2002
-Contact:	Cornelia Huck <cornelia.huck@de.ibm.com>
-		linux-s390@vger.kernel.org
+Contact:	linux-s390@vger.kernel.org
 Description:	Contains the PIM/PAM/POM values, as reported by the
 		channel subsystem when last queried by the common I/O
 		layer (this implies that this attribute is not necessarily
@@ -38,8 +34,7 @@ Users:		s390-tools, HAL
 
 What:		/sys/bus/css/devices/.../driver_override
 Date:		June 2019
-Contact:	Cornelia Huck <cohuck@redhat.com>
-		linux-s390@vger.kernel.org
+Contact:	linux-s390@vger.kernel.org
 Description:	This file allows the driver for a device to be specified. When
 		specified, only a driver with a name matching the value written
 		to driver_override will have an opportunity to bind to the

Documentation/ABI/testing/sysfs-class-net-peak_usb

@@ -0,0 +1,19 @@
+
+What:		/sys/class/net/<iface>/peak_usb/can_channel_id
+Date:		November 2022
+KernelVersion:	6.2
+Contact:	Stephane Grosjean <s.grosjean@peak-system.com>
+Description:
+		PEAK PCAN-USB devices support user-configurable CAN channel
+		identifiers. Contrary to a USB serial number, these identifiers
+		are writable and can be set per CAN interface. This means that
+		if a USB device exports multiple CAN interfaces, each of them
+		can be assigned a unique channel ID.
+		This attribute provides read-only access to the currently
+		configured value of the channel identifier. Depending on the
+		device type, the identifier has a length of 8 or 32 bit. The
+		value read from this attribute is always an 8 digit 32 bit
+		hexadecimal value in big endian format. If the device only
+		supports an 8 bit identifier, the upper 24 bit of the value are
+		set to zero.
+

Documentation/ABI/testing/sysfs-driver-qat

@@ -1,6 +1,6 @@
 What:		/sys/bus/pci/devices/<BDF>/qat/state
 Date:		June 2022
-KernelVersion:	5.20
+KernelVersion:	6.0
 Contact:	qat-linux@intel.com
 Description:	(RW) Reports the current state of the QAT device. Write to
 		the file to start or stop the device.
@@ -18,7 +18,7 @@ Description:	(RW) Reports the current state of the QAT device. Write to
 
 What:		/sys/bus/pci/devices/<BDF>/qat/cfg_services
 Date:		June 2022
-KernelVersion:	5.20
+KernelVersion:	6.0
 Contact:	qat-linux@intel.com
 Description:	(RW) Reports the current configuration of the QAT device.
 		Write to the file to change the configured services.

Documentation/ABI/testing/sysfs-fs-erofs

@@ -4,7 +4,8 @@ Contact:	"Huang Jianan" <huangjianan@oppo.com>
 Description:	Shows all enabled kernel features.
 		Supported features:
 		zero_padding, compr_cfgs, big_pcluster, chunked_file,
-		device_table, compr_head2, sb_chksum.
+		device_table, compr_head2, sb_chksum, ztailpacking,
+		dedupe, fragments.
 
 What:		/sys/fs/erofs/<disk>/sync_decompress
 Date:		November 2021

Documentation/RCU/NMI-RCU.rst

@@ -8,7 +8,7 @@ Although RCU is usually used to protect read-mostly data structures,
 it is possible to use RCU to provide dynamic non-maskable interrupt
 handlers, as well as dynamic irq handlers.  This document describes
 how to do this, drawing loosely from Zwane Mwaikambo's NMI-timer
-work in "arch/x86/kernel/traps.c".
+work in an old version of "arch/x86/kernel/traps.c".
 
 The relevant pieces of code are listed below, each followed by a
 brief explanation::
@@ -116,7 +116,7 @@ Answer to Quick Quiz:
 
 	This same sad story can happen on other CPUs when using
 	a compiler with aggressive pointer-value speculation
-	optimizations.
+	optimizations.  (But please don't!)
 
 	More important, the rcu_dereference_sched() makes it
 	clear to someone reading the code that the pointer is

Documentation/RCU/UP.rst

@@ -38,7 +38,7 @@ by having call_rcu() directly invoke its arguments only if it was called
 from process context.  However, this can fail in a similar manner.
 
 Suppose that an RCU-based algorithm again scans a linked list containing
-elements A, B, and C in process contexts, but that it invokes a function
+elements A, B, and C in process context, but that it invokes a function
 on each element as it is scanned.  Suppose further that this function
 deletes element B from the list, then passes it to call_rcu() for deferred
 freeing.  This may be a bit unconventional, but it is perfectly legal
@@ -59,7 +59,8 @@ Example 3: Death by Deadlock
 Suppose that call_rcu() is invoked while holding a lock, and that the
 callback function must acquire this same lock.  In this case, if
 call_rcu() were to directly invoke the callback, the result would
-be self-deadlock.
+be self-deadlock *even if* this invocation occurred from a later
+call_rcu() invocation a full grace period later.
 
 In some cases, it would possible to restructure to code so that
 the call_rcu() is delayed until after the lock is released.  However,
@@ -85,6 +86,14 @@ Quick Quiz #2:
 
 :ref:`Answers to Quick Quiz <answer_quick_quiz_up>`
 
+It is important to note that userspace RCU implementations *do*
+permit call_rcu() to directly invoke callbacks, but only if a full
+grace period has elapsed since those callbacks were queued.  This is
+the case because some userspace environments are extremely constrained.
+Nevertheless, people writing userspace RCU implementations are strongly
+encouraged to avoid invoking callbacks from call_rcu(), thus obtaining
+the deadlock-avoidance benefits called out above.
+
 Summary
 -------
 

Documentation/RCU/lockdep.rst

@@ -69,9 +69,8 @@ checking of rcu_dereference() primitives:
 		value of the pointer itself, for example, against NULL.
 
 The rcu_dereference_check() check expression can be any boolean
-expression, but would normally include a lockdep expression.  However,
-any boolean expression can be used.  For a moderately ornate example,
-consider the following::
+expression, but would normally include a lockdep expression.  For a
+moderately ornate example, consider the following::
 
 	file = rcu_dereference_check(fdt->fd[fd],
 				     lockdep_is_held(&files->file_lock) ||
@@ -97,10 +96,10 @@ code, it could instead be written as follows::
 					 atomic_read(&files->count) == 1);
 
 This would verify cases #2 and #3 above, and furthermore lockdep would
-complain if this was used in an RCU read-side critical section unless one
-of these two cases held.  Because rcu_dereference_protected() omits all
-barriers and compiler constraints, it generates better code than do the
-other flavors of rcu_dereference().  On the other hand, it is illegal
+complain even if this was used in an RCU read-side critical section unless
+one of these two cases held.  Because rcu_dereference_protected() omits
+all barriers and compiler constraints, it generates better code than do
+the other flavors of rcu_dereference().  On the other hand, it is illegal
 to use rcu_dereference_protected() if either the RCU-protected pointer
 or the RCU-protected data that it points to can change concurrently.