Merge patch series "Zacas/Zabha support and qspinlocks"

Alexandre Ghiti <alexghiti@rivosinc.com> says:

This implements [cmp]xchgXX() macros using Zacas and Zabha extensions
and finally uses those newly introduced macros to add support for
qspinlocks: note that this implementation of qspinlocks satisfies the
forward progress guarantee.

It also uses Ziccrse to provide the qspinlock implementation.

Thanks to Guo and Leonardo for their work!

* b4-shazam-merge: (1314 commits)
  riscv: Add qspinlock support
  dt-bindings: riscv: Add Ziccrse ISA extension description
  riscv: Add ISA extension parsing for Ziccrse
  asm-generic: ticket-lock: Add separate ticket-lock.h
  asm-generic: ticket-lock: Reuse arch_spinlock_t of qspinlock
  riscv: Implement xchg8/16() using Zabha
  riscv: Implement arch_cmpxchg128() using Zacas
  riscv: Improve zacas fully-ordered cmpxchg()
  riscv: Implement cmpxchg8/16() using Zabha
  dt-bindings: riscv: Add Zabha ISA extension description
  riscv: Implement cmpxchg32/64() using Zacas
  riscv: Do not fail to build on byte/halfword operations with Zawrs
  riscv: Move cpufeature.h macros into their own header

Link: https://lore.kernel.org/r/20241103145153.105097-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

Author: palmer-dabbelt

.mailmap

@@ -73,6 +73,8 @@ Andrey Ryabinin <ryabinin.a.a@gmail.com> <aryabinin@virtuozzo.com>
 Andrzej Hajda <andrzej.hajda@intel.com> <a.hajda@samsung.com>
 André Almeida <andrealmeid@igalia.com> <andrealmeid@collabora.com>
 Andy Adamson <andros@citi.umich.edu>
+Andy Chiu <andybnac@gmail.com> <andy.chiu@sifive.com>
+Andy Chiu <andybnac@gmail.com> <taochiu@synology.com>
 Andy Shevchenko <andy@kernel.org> <andy@smile.org.ua>
 Andy Shevchenko <andy@kernel.org> <ext-andriy.shevchenko@nokia.com>
 Anilkumar Kolli <quic_akolli@quicinc.com> <akolli@codeaurora.org>
@@ -203,12 +205,16 @@ Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> <ezequiel@collabora.com>
 Faith Ekstrand <faith.ekstrand@collabora.com> <jason@jlekstrand.net>
 Faith Ekstrand <faith.ekstrand@collabora.com> <jason.ekstrand@intel.com>
 Faith Ekstrand <faith.ekstrand@collabora.com> <jason.ekstrand@collabora.com>
+Fangrui Song <i@maskray.me> <maskray@google.com>
 Felipe W Damasio <felipewd@terra.com.br>
 Felix Kuhling <fxkuehl@gmx.de>
 Felix Moeller <felix@derklecks.de>
 Fenglin Wu <quic_fenglinw@quicinc.com> <fenglinw@codeaurora.org>
 Filipe Lautert <filipe@icewall.org>
 Finn Thain <fthain@linux-m68k.org> <fthain@telegraphics.com.au>
+Fiona Behrens <me@kloenk.dev>
+Fiona Behrens <me@kloenk.dev> <me@kloenk.de>
+Fiona Behrens <me@kloenk.dev> <fin@nyantec.com>
 Franck Bui-Huu <vagabon.xyz@gmail.com>
 Frank Rowand <frowand.list@gmail.com> <frank.rowand@am.sony.com>
 Frank Rowand <frowand.list@gmail.com> <frank.rowand@sony.com>
@@ -300,6 +306,11 @@ Jens Axboe <axboe@kernel.dk> <axboe@fb.com>
 Jens Axboe <axboe@kernel.dk> <axboe@meta.com>
 Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
 Jernej Skrabec <jernej.skrabec@gmail.com> <jernej.skrabec@siol.net>
+Jesper Dangaard Brouer <hawk@kernel.org> <brouer@redhat.com>
+Jesper Dangaard Brouer <hawk@kernel.org> <hawk@comx.dk>
+Jesper Dangaard Brouer <hawk@kernel.org> <jbrouer@redhat.com>
+Jesper Dangaard Brouer <hawk@kernel.org> <jdb@comx.dk>
+Jesper Dangaard Brouer <hawk@kernel.org> <netoptimizer@brouer.com>
 Jessica Zhang <quic_jesszhan@quicinc.com> <jesszhan@codeaurora.org>
 Jilai Wang <quic_jilaiw@quicinc.com> <jilaiw@codeaurora.org>
 Jiri Kosina <jikos@kernel.org> <jikos@jikos.cz>

CREDITS

@@ -1358,10 +1358,6 @@ D: Major kbuild rework during the 2.5 cycle
 D: ISDN Maintainer
 S: USA
 
-N: Gerrit Renker
-E: gerrit@erg.abdn.ac.uk
-D: DCCP protocol support.
-
 N: Philip Gladstone
 E: philip@gladstonefamily.net
 D: Kernel / timekeeping stuff
@@ -1677,11 +1673,6 @@ W: http://www.carumba.com/
 D: bug toaster (A1 sauce makes all the difference)
 D: Random linux hacker
 
-N: James Hogan
-E: jhogan@kernel.org
-D: Metag architecture maintainer
-D: TZ1090 SoC maintainer
-
 N: Tim Hockin
 E: thockin@hockin.org
 W: http://www.hockin.org/~thockin
@@ -1697,6 +1688,11 @@ D: hwmon subsystem maintainer
 D: i2c-sis96x and i2c-stub SMBus drivers
 S: USA
 
+N: James Hogan
+E: jhogan@kernel.org
+D: Metag architecture maintainer
+D: TZ1090 SoC maintainer
+
 N: Dirk Hohndel
 E: hohndel@suse.de
 D: The XFree86[tm] Project
@@ -1872,6 +1868,10 @@ S: K osmidomkum 723
 S: 160 00 Praha 6
 S: Czech Republic
 
+N: Seth Jennings
+E: sjenning@redhat.com
+D: Creation and maintenance of zswap
+
 N: Jeremy Kerr
 D: Maintainer of SPU File System
 
@@ -2188,19 +2188,6 @@ N: Mike Kravetz
 E: mike.kravetz@oracle.com
 D: Maintenance and development of the hugetlb subsystem
 
-N: Seth Jennings
-E: sjenning@redhat.com
-D: Creation and maintenance of zswap
-
-N: Dan Streetman
-E: ddstreet@ieee.org
-D: Maintenance and development of zswap
-D: Creation and maintenance of the zpool API
-
-N: Vitaly Wool
-E: vitaly.wool@konsulko.com
-D: Maintenance and development of zswap
-
 N: Andreas S. Krebs
 E: akrebs@altavista.net
 D: CYPRESS CY82C693 chipset IDE, Digital's PC-Alpha 164SX boards
@@ -3191,6 +3178,11 @@ N: Ken Pizzini
 E: ken@halcyon.com
 D: CDROM driver "sonycd535" (Sony CDU-535/531)
 
+N: Mathieu Poirier
+E: mathieu.poirier@linaro.org
+D: CoreSight kernel subsystem, Maintainer 2014-2022
+D: Perf tool support for CoreSight
+
 N: Stelian Pop
 E: stelian@popies.net
 P: 1024D/EDBB6147 7B36 0E07 04BC 11DC A7A0  D3F7 7185 9E7A EDBB 6147
@@ -3300,6 +3292,10 @@ S: Schlossbergring 9
 S: 79098 Freiburg
 S: Germany
 
+N: Gerrit Renker
+E: gerrit@erg.abdn.ac.uk
+D: DCCP protocol support.
+
 N: Thomas Renninger
 E: trenn@suse.de
 D: cpupowerutils
@@ -3576,11 +3572,6 @@ D: several improvements to system programs
 S: Oldenburg
 S: Germany
 
-N: Mathieu Poirier
-E: mathieu.poirier@linaro.org
-D: CoreSight kernel subsystem, Maintainer 2014-2022
-D: Perf tool support for CoreSight
-
 N: Robert Schwebel
 E: robert@schwebel.de
 W: https://www.schwebel.de
@@ -3771,6 +3762,11 @@ S: Chr. Winthersvej 1 B, st.th.
 S: DK-1860 Frederiksberg C
 S: Denmark
 
+N: Dan Streetman
+E: ddstreet@ieee.org
+D: Maintenance and development of zswap
+D: Creation and maintenance of the zpool API
+
 N: Drew Sullivan
 E: drew@ss.org
 W: http://www.ss.org/
@@ -4286,6 +4282,10 @@ S: Pipers Way
 S: Swindon. SN3 1RJ
 S: England
 
+N: Vitaly Wool
+E: vitaly.wool@konsulko.com
+D: Maintenance and development of zswap
+
 N: Chris Wright
 E: chrisw@sous-sol.org
 D: hacking on LSM framework and security modules.

Documentation/admin-guide/LSM/ipe.rst

@@ -223,7 +223,10 @@ are signed through the PKCS#7 message format to enforce some level of
 authorization of the policies (prohibiting an attacker from gaining
 unconstrained root, and deploying an "allow all" policy). These
 policies must be signed by a certificate that chains to the
-``SYSTEM_TRUSTED_KEYRING``. With openssl, the policy can be signed by::
+``SYSTEM_TRUSTED_KEYRING``, or to the secondary and/or platform keyrings if
+``CONFIG_IPE_POLICY_SIG_SECONDARY_KEYRING`` and/or
+``CONFIG_IPE_POLICY_SIG_PLATFORM_KEYRING`` are enabled, respectively.
+With openssl, the policy can be signed by::
 
    openssl smime -sign \
       -in "$MY_POLICY" \
@@ -266,7 +269,7 @@ in the kernel. This file is write-only and accepts a PKCS#7 signed
 policy. Two checks will always be performed on this policy: First, the
 ``policy_names`` must match with the updated version and the existing
 version. Second the updated policy must have a policy version greater than
-or equal to the currently-running version. This is to prevent rollback attacks.
+the currently-running version. This is to prevent rollback attacks.
 
 The ``delete`` file is used to remove a policy that is no longer needed.
 This file is write-only and accepts a value of ``1`` to delete the policy.

Documentation/admin-guide/pm/cpufreq.rst

@@ -425,8 +425,8 @@ This governor exposes only one tunable:
 
 ``rate_limit_us``
 	Minimum time (in microseconds) that has to pass between two consecutive
-	runs of governor computations (default: 1000 times the scaling driver's
-	transition latency).
+	runs of governor computations (default: 1.5 times the scaling driver's
+	transition latency or the maximum 2ms).
 
 	The purpose of this tunable is to reduce the scheduler context overhead
 	of the governor which might be excessive without it.
@@ -474,17 +474,17 @@ This governor exposes the following tunables:
 	This is how often the governor's worker routine should run, in
 	microseconds.
 
-	Typically, it is set to values of the order of 10000 (10 ms).  Its
-	default value is equal to the value of ``cpuinfo_transition_latency``
-	for each policy this governor is attached to (but since the unit here
-	is greater by 1000, this means that the time represented by
-	``sampling_rate`` is 1000 times greater than the transition latency by
-	default).
+	Typically, it is set to values of the order of 2000 (2 ms).  Its
+	default value is to add a 50% breathing room
+	to ``cpuinfo_transition_latency`` on each policy this governor is
+	attached to. The minimum is typically the length of two scheduler
+	ticks.
 
 	If this tunable is per-policy, the following shell command sets the time
-	represented by it to be 750 times as high as the transition latency::
+	represented by it to be 1.5 times as high as the transition latency
+	(the default)::
 
-	# echo `$(($(cat cpuinfo_transition_latency) * 750 / 1000)) > ondemand/sampling_rate
+	# echo `$(($(cat cpuinfo_transition_latency) * 3 / 2)) > ondemand/sampling_rate
 
 ``up_threshold``
 	If the estimated CPU load is above this value (in percent), the governor

Documentation/arch/arm/mem_alignment.rst

@@ -12,7 +12,7 @@ ones.
 
 Of course this is a bad idea to rely on the alignment trap to perform
 unaligned memory access in general.  If those access are predictable, you
-are better to use the macros provided by include/asm/unaligned.h.  The
+are better to use the macros provided by include/linux/unaligned.h.  The
 alignment trap can fixup misaligned access for the exception cases, but at
 a high performance cost.  It better be rare.
 

Documentation/arch/arm64/silicon-errata.rst

@@ -146,6 +146,8 @@ stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | ARM            | Cortex-A715     | #2645198        | ARM64_ERRATUM_2645198       |
 +----------------+-----------------+-----------------+-----------------------------+
+| ARM            | Cortex-A715     | #3456084        | ARM64_ERRATUM_3194386       |
++----------------+-----------------+-----------------+-----------------------------+
 | ARM            | Cortex-A720     | #3456091        | ARM64_ERRATUM_3194386       |
 +----------------+-----------------+-----------------+-----------------------------+
 | ARM            | Cortex-A725     | #3456106        | ARM64_ERRATUM_3194386       |
@@ -186,6 +188,8 @@ stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | ARM            | Neoverse-N2     | #3324339        | ARM64_ERRATUM_3194386       |
 +----------------+-----------------+-----------------+-----------------------------+
+| ARM            | Neoverse-N3     | #3456111        | ARM64_ERRATUM_3194386       |
++----------------+-----------------+-----------------+-----------------------------+
 | ARM            | Neoverse-V1     | #1619801        | N/A                         |
 +----------------+-----------------+-----------------+-----------------------------+
 | ARM            | Neoverse-V1     | #3324341        | ARM64_ERRATUM_3194386       |
@@ -289,3 +293,5 @@ stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | Microsoft      | Azure Cobalt 100| #2253138        | ARM64_ERRATUM_2253138       |
 +----------------+-----------------+-----------------+-----------------------------+
+| Microsoft      | Azure Cobalt 100| #3324339        | ARM64_ERRATUM_3194386       |
++----------------+-----------------+-----------------+-----------------------------+