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EXPORT_SYMBOL and __init is a bad combination because the .init.text
section is freed up after the initialization. Hence, modules cannot
use symbols annotated __init. The access to a freed symbol may end up
with kernel panic.
modpost used to detect it, but it has been broken for a decade.
Recently, I fixed modpost so it started to warn it again, then this
showed up in linux-next builds.
There are two ways to fix it:
- Remove __init
- Remove EXPORT_SYMBOL
I chose the latter for this case because the only in-tree call-site,
arch/x86/kernel/cpu/mshyperv.c is never compiled as modular.
(CONFIG_HYPERVISOR_GUEST is boolean)
Fixes: dd2cb348613b ("clocksource/drivers: Continue making Hyper-V clocksource ISA agnostic")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20220606050238.4162200-1-masahiroy@kernel.org
Signed-off-by: Wei Liu <wei.liu@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull clockevent/clocksource updates from Thomas Gleixner:
- Device tree bindings for MT8186
- Tell the kernel that the RISC-V SBI timer stops in deeper power
states
- Make device tree parsing in sp804 more robust
- Dead code removal and tiny fixes here and there
- Add the missing SPDX identifiers
* tag 'timers-core-2022-06-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource/drivers/oxnas-rps: Fix irq_of_parse_and_map() return value
clocksource/drivers/timer-ti-dm: Remove unnecessary NULL check
clocksource/drivers/timer-sun5i: Convert to SPDX identifier
clocksource/drivers/timer-sun4i: Convert to SPDX identifier
clocksource/drivers/pistachio: Convert to SPDX identifier
clocksource/drivers/orion: Convert to SPDX identifier
clocksource/drivers/lpc32xx: Convert to SPDX identifier
clocksource/drivers/digicolor: Convert to SPDX identifier
clocksource/drivers/armada-370-xp: Convert to SPDX identifier
clocksource/drivers/mips-gic-timer: Convert to SPDX identifier
clocksource/drivers/jcore: Convert to SPDX identifier
clocksource/drivers/bcm_kona: Convert to SPDX identifier
clocksource/drivers/sp804: Avoid error on multiple instances
clocksource/drivers/riscv: Events are stopped during CPU suspend
clocksource/drivers/ixp4xx: Drop boardfile probe path
dt-bindings: timer: Add compatible for Mediatek MT8186
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The irq_of_parse_and_map() returns 0 on failure, not a negative ERRNO.
Fixes: 89355274e1f7 ("clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220422104101.55754-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The "pdata" pointer cannot be NULL because it's checked at the start of
the function. Delete the check.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YoZM65RFDQAfqV6J@kili
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The license information clearly states GPL version 2 only. The extra text
which excludes warranties is an excerpt of the corresponding GPLv2 clause
11.
So the SPDX identifier covers it completely.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Samuel Holland <samuel@sholland.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: linux-sunxi@lists.linux.dev
Link: https://lore.kernel.org/r/20220510171254.970933294@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The license information clearly states GPL version 2 only. The extra text
which excludes warranties is an excerpt of the corresponding GPLv2 clause
11.
So the SPDX identifier covers it completely.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Samuel Holland <samuel@sholland.org>
Cc: linux-sunxi@lists.linux.dev
Link: https://lore.kernel.org/r/20220510171254.908144392@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The licensing text references explicitely the COPYING file in the kernel
base directory, which is clearly GPL version 2 only.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20220510171254.843410802@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The license information clearly states GPL version 2 only. The extra text
which excludes warranties is an excerpt of the corresponding GPLv2 clause
11.
So the SPDX identifier covers it completely.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20220510171254.780389240@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The license information clearly states GPL version 2 only. The extra text
which excludes warranties is an excerpt of the corresponding GPLv2 clause
11.
So the SPDX identifier covers it completely.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Joachim Eastwood <manabian@gmail.com>
Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Link: https://lore.kernel.org/r/20220510171254.717233312@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The license information clearly states GPL version 2 only. The extra text
which excludes warranties is an excerpt of the corresponding GPLv2 clause
11.
So the SPDX identifier covers it completely.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Baruch Siach <baruch@tkos.co.il>
Cc: linux-arm-kernel@lists.infradead.org
Acked-by: Baruch Siach <baruch@tkos.co.il>
Link: https://lore.kernel.org/r/20220510171254.655035023@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The license information clearly states GPL version 2 only. The extra text
which excludes warranties is an excerpt of the corresponding GPLv2 clause
11.
So the SPDX identifier covers it completely.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20220510171254.592781786@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The licensing text references explicitely the COPYING file in the kernel
base directory, which is clearly GPL version 2 only.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-mips@vger.kernel.org
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20220510171254.529249404@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The licensing text references explicitely the COPYING file in the kernel
base directory, which is clearly GPL version 2 only.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Rich Felker <dalias@libc.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20220510171254.467236056@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The license information clearly states GPL version 2 only. The extra text
which excludes warranties is a transcript of the corresponding GPLv2 clause
11, which is explicitely referenced for details.
So the SPDX identifier covers it completely.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: Broadcom Kernel Team <bcm-kernel-feedback-list@broadcom.com>
Cc: linux-spdx@vger.kernel.org
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220510171254.404209482@linutronix.de
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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When a machine sports more than one SP804 timer instance, we only bring
up the first one, since multiple timers of the same kind are not useful
to Linux. As this is intentional behaviour, we should not return an
error message, as we do today:
===============
[ 0.000800] Failed to initialize '/bus@8000000/motherboard-bus@8000000/iofpga-bus@300000000/timer@120000': -22
===============
Replace the -EINVAL return with a debug message and return 0 instead.
Also we do not reach the init function anymore if the DT node is
disabled (as this is now handled by OF_DECLARE), so remove the explicit
check for that case.
This fixes a long standing bogus error when booting ARM's fastmodels.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220506162522.3675399-1-andre.przywara@arm.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Some implementations of the SBI time extension depend on hart-local
state (for example, CSRs) that are lost or hardware that is powered
down when a CPU is suspended. To be safe, the clockevents driver
cannot assume that timer IRQs will be received during CPU suspend.
Fixes: 62b019436814 ("clocksource: new RISC-V SBI timer driver")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20220509012121.40031-1-samuel@sholland.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The boardfiles for IXP4xx have been deleted. Delete all the
quirks and code dealing with that boot path and rely solely on
device tree boot.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220406205505.2332821-1-linus.walleij@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Patch series from Nick Hawkins:
"The GXP is the HPE BMC SoC that is used in the majority of HPE current
generation servers. Traditionally the asic will last multiple
generations of server before being replaced.
Info about SoC:
HPE GXP is the name of the HPE Soc. This SoC is used to implement many
BMC features at HPE. It supports ARMv7 architecture based on the Cortex
A9 core. It is capable of using an AXI bus to which a memory controller
is attached. It has multiple SPI interfaces to connect boot flash and
BIOS flash. It uses a 10/100/1000 MAC for network connectivity. It has
multiple i2c engines to drive connectivity with a host infrastructure.
The initial patches enable the watchdog and timer enabling the host to
be able to boot."
* hpe/gxp-soc:
MAINTAINERS: Introduce HPE GXP Architecture
ARM: dts: Introduce HPE GXP Device tree
dt-bindings: arm: hpe: add GXP Support
dt-bindings: timer: hpe,gxp-timer: Add HPE GXP Timer and Watchdog
clocksource/drivers/timer-gxp: Add HPE GXP Timer
watchdog: hpe-wdt: Introduce HPE GXP Watchdog
ARM: configs: multi_v7_defconfig: Add HPE GXP ARCH
ARM: hpe: Introduce the HPE GXP architecture
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Add support for the HPE GXP SOC timer. The GXP supports several different
kinds of timers but for the purpose of this driver there is only support
for the General Timer. The timer has a 1us resolution and is 32 bits. The
timer also creates a child watchdog device as the register region is the
same.
Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic updates from Arnd Bergmann:
"The asm-generic tree contains three separate changes for linux-5.19:
- The h8300 architecture is retired after it has been effectively
unmaintained for a number of years. This is the last architecture
we supported that has no MMU implementation, but there are still a
few architectures (arm, m68k, riscv, sh and xtensa) that support
CPUs with and without an MMU.
- A series to add a generic ticket spinlock that can be shared by
most architectures with a working cmpxchg or ll/sc type atomic,
including the conversion of riscv, csky and openrisc. This series
is also a prerequisite for the loongarch64 architecture port that
will come as a separate pull request.
- A cleanup of some exported uapi header files to ensure they can be
included from user space without relying on other kernel headers"
* tag 'asm-generic-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
h8300: remove stale bindings and symlink
sparc: add asm/stat.h to UAPI compile-test coverage
powerpc: add asm/stat.h to UAPI compile-test coverage
mips: add asm/stat.h to UAPI compile-test coverage
riscv: add linux/bpf_perf_event.h to UAPI compile-test coverage
kbuild: prevent exported headers from including <stdlib.h>, <stdbool.h>
agpgart.h: do not include <stdlib.h> from exported header
csky: Move to generic ticket-spinlock
RISC-V: Move to queued RW locks
RISC-V: Move to generic spinlocks
openrisc: Move to ticket-spinlock
asm-generic: qrwlock: Document the spinlock fairness requirements
asm-generic: qspinlock: Indicate the use of mixed-size atomics
asm-generic: ticket-lock: New generic ticket-based spinlock
remove the h8300 architecture
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asm-generic
* 'remove-h8300' of git://git.infradead.org/users/hch/misc:
remove the h8300 architecture
This is clearly the least actively maintained architecture we have at
the moment, and probably the least useful. It is now the only one that
does not support MMUs at all, and most of the boards only support 4MB
of RAM, out of which the defconfig kernel needs more than half just
for .text/.data.
Guenter Roeck did the original patch to remove the architecture in 2013
after it had already been obsolete for a while, and Yoshinori Sato brought
it back in a much more modern form in 2015. Looking at the git history
since the reinstantiation, it's clear that almost all commits in the tree
are build fixes or cross-architecture cleanups:
$ git log --no-merges --format=%an v4.5.. arch/h8300/ | sort | uniq
-c | sort -rn | head -n 12
25 Masahiro Yamada
18 Christoph Hellwig
14 Mike Rapoport
9 Arnd Bergmann
8 Mark Rutland
7 Peter Zijlstra
6 Kees Cook
6 Ingo Molnar
6 Al Viro
5 Randy Dunlap
4 Yury Norov
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Signed-off-by: Christoph Hellwig <hch@lst.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARMv4T/v5 multiplatform support from Arnd Bergmann:
"This series has been 12 years in the making, it mostly finishes the
work that was started with the founding of Linaro to clean up platform
support in the kernel.
The largest change here is a cleanup of the omap1 platform, which is
the final ARM machine type to get converted to the common-clk
subsystem. All the omap1 specific drivers are now made independent of
the mach/*.h headers to allow the platform to be part of a generic
ARMv4/v5 multiplatform kernel.
The last bit that enables this support is still missing here while we
wait for some last dependencies to make it into the mainline kernel
through other subsystems.
The s3c24xx, ixp4xx, iop32x, ep93xx and dove platforms were all almost
at the point of allowing multiplatform kernels, this work gets
completed here along with a few additional cleanup. At the same time,
the s3c24xx and s3c64xx are now deprecated and expected to get removed
in the future.
The PXA and OMAP1 bits are in a separate branch because of
dependencies. Once both branches are merged, only the three Intel
StrongARM platforms (RiscPC, Footbridge/NetWinder and StrongARM1100)
need separate kernels, and there are no plans to include these"
* tag 'arm-multiplatform-5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (61 commits)
ARM: ixp4xx: Consolidate Kconfig fixing issue
ARM: versatile: Add missing of_node_put in dcscb_init
ARM: config: Refresh IXP4xx config after multiplatform
ARM: omap1: add back omap_set_dma_priority() stub
ARM: omap: fix missing declaration warnings
ARM: omap: fix address space warnings from sparse
ARM: spear: remove include/mach/ subdirectory
ARM: davinci: remove include/mach/ subdirectory
ARM: omap2: remove include/mach/ subdirectory
integrator: remove empty ap_init_early()
ARM: s3c: fix include path
MAINTAINERS: omap1: Add Janusz as an additional maintainer
ARM: omap1: htc_herald: fix typos in comments
ARM: OMAP1: fix typos in comments
ARM: OMAP1: clock: Remove noop code
ARM: OMAP1: clock: Remove unused code
ARM: OMAP1: clock: Fix UART rate reporting algorithm
ARM: OMAP1: clock: Fix early UART rate issues
ARM: OMAP1: Prepare for conversion of OMAP1 clocks to CCF
ARM: omap1: fix build with no SoC selected
...
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As a preparation for future omap1 multiplatform support, stop
using mach/hardware.h and instead include the omap1-io.h
for low-level register access to MOD_CONF_CTRL_1.
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Add a clocksource based on the goldfish-rtc device.
Move the timer register definition to <clocksource/timer-goldfish.h>
This kernel implementation is based on the QEMU upstream implementation:
https://git.qemu.org/?p=qemu.git;a=blob_plain;f=hw/rtc/goldfish_rtc.c
goldfish-timer is a high-precision signed 64-bit nanosecond timer.
It is part of the 'goldfish' virtual hardware platform used to run
some emulated Android systems under QEMU.
This timer only supports oneshot event.
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20220406201523.243733-4-laurent@vivier.eu
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic updates from Arnd Bergmann:
"There are three sets of updates for 5.18 in the asm-generic tree:
- The set_fs()/get_fs() infrastructure gets removed for good.
This was already gone from all major architectures, but now we can
finally remove it everywhere, which loses some particularly tricky
and error-prone code. There is a small merge conflict against a
parisc cleanup, the solution is to use their new version.
- The nds32 architecture ends its tenure in the Linux kernel.
The hardware is still used and the code is in reasonable shape, but
the mainline port is not actively maintained any more, as all
remaining users are thought to run vendor kernels that would never
be updated to a future release.
- A series from Masahiro Yamada cleans up some of the uapi header
files to pass the compile-time checks"
* tag 'asm-generic-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (27 commits)
nds32: Remove the architecture
uaccess: remove CONFIG_SET_FS
ia64: remove CONFIG_SET_FS support
sh: remove CONFIG_SET_FS support
sparc64: remove CONFIG_SET_FS support
lib/test_lockup: fix kernel pointer check for separate address spaces
uaccess: generalize access_ok()
uaccess: fix type mismatch warnings from access_ok()
arm64: simplify access_ok()
m68k: fix access_ok for coldfire
MIPS: use simpler access_ok()
MIPS: Handle address errors for accesses above CPU max virtual user address
uaccess: add generic __{get,put}_kernel_nofault
nios2: drop access_ok() check from __put_user()
x86: use more conventional access_ok() definition
x86: remove __range_not_ok()
sparc64: add __{get,put}_kernel_nofault()
nds32: fix access_ok() checks in get/put_user
uaccess: fix nios2 and microblaze get_user_8()
sparc64: fix building assembly files
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The nds32 architecture, also known as AndeStar V3, is a custom 32-bit
RISC target designed by Andes Technologies. Support was added to the
kernel in 2016 as the replacement RISC-V based V5 processors were
already announced, and maintained by (current or former) Andes
employees.
As explained by Alan Kao, new customers are now all using RISC-V,
and all known nds32 users are already on longterm stable kernels
provided by Andes, with no development work going into mainline
support any more.
While the port is still in a reasonably good shape, it only gets
worse over time without active maintainers, so it seems best
to remove it before it becomes unusable. As always, if it turns
out that there are mainline users after all, and they volunteer
to maintain the port in the future, the removal can be reverted.
Link: https://lore.kernel.org/linux-mm/YhdWNLUhk+x9RAzU@yamatobi.andestech.com/
Link: https://lore.kernel.org/lkml/20220302065213.82702-1-alankao@andestech.com/
Link: https://www.andestech.com/en/products-solutions/andestar-architecture/
Signed-off-by: Alan Kao <alankao@andestech.com>
[arnd: rewrite changelog to provide more background]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"From the new functionality perspective, the most significant items
here are the new driver for the 'ARM Generic Diagnostic Dump and
Reset' device, the extension of fine grain fan control in the ACPI fan
driver, and the change making it possible to use CPPC information to
obtain CPU capacity.
There are also a few new quirks, a bunch of fixes, including the
platform-level _OSC handling change to make it actually take the
platform firmware response into account, some code and documentation
cleanups, and a notable update of the ACPI device enumeration
documentation.
Specifics:
- Use uintptr_t and offsetof() in the ACPICA code to avoid compiler
warnings regarding NULL pointer arithmetic (Rafael Wysocki).
- Fix possible NULL pointer dereference in acpi_ns_walk_namespace()
when passed "acpi=off" in the command line (Rafael Wysocki).
- Fix and clean up acpi_os_read/write_port() (Rafael Wysocki).
- Introduce acpi_bus_for_each_dev() and use it for walking all ACPI
device objects in the Type C code (Rafael Wysocki).
- Fix the _OSC platform capabilities negotioation and prevent CPPC
from being used if the platform firmware indicates that it not
supported via _OSC (Rafael Wysocki).
- Use ida_alloc() instead of ida_simple_get() for ACPI enumeration of
devices (Rafael Wysocki).
- Add AGDI and CEDT to the list of known ACPI table signatures (Ilkka
Koskinen, Robert Kiraly).
- Add power management debug messages related to suspend-to-idle in
two places (Rafael Wysocki).
- Fix __acpi_node_get_property_reference() return value and clean up
that function (Andy Shevchenko, Sakari Ailus).
- Fix return value of the __setup handler in the ACPI PM timer clock
source driver (Randy Dunlap).
- Clean up double words in two comments (Tom Rix).
- Add "skip i2c clients" quirks for Lenovo Yoga Tablet 1050F/L and
Nextbook Ares 8 (Hans de Goede).
- Clean up frequency invariance handling on x86 in the ACPI CPPC
library (Huang Rui).
- Work around broken XSDT on the Advantech DAC-BJ01 board (Mark
Cilissen).
- Make wakeup events checks in the ACPI EC driver more
straightforward and clean up acpi_ec_submit_event() (Rafael
Wysocki).
- Make it possible to obtain the CPU capacity with the help of CPPC
information (Ionela Voinescu).
- Improve fine grained fan control in the ACPI fan driver and
document it (Srinivas Pandruvada).
- Add device HID and quirk for Microsoft Surface Go 3 to the ACPI
battery driver (Maximilian Luz).
- Make the ACPI driver for Intel SoCs (LPSS) let the SPI driver know
the exact type of the controller (Andy Shevchenko).
- Force native backlight mode on Clevo NL5xRU and NL5xNU (Werner
Sembach).
- Fix return value of __setup handlers in the APEI code (Randy
Dunlap).
- Add Arm Generic Diagnostic Dump and Reset device driver (Ilkka
Koskinen).
- Limit printable size of BERT table data (Darren Hart).
- Fix up HEST and GHES initialization (Shuai Xue).
- Update the ACPI device enumeration documentation and unify the ASL
style in GPIO-related examples (Andy Shevchenko)"
* tag 'acpi-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (52 commits)
clocksource: acpi_pm: fix return value of __setup handler
ACPI: bus: Avoid using CPPC if not supported by firmware
Revert "ACPI: Pass the same capabilities to the _OSC regardless of the query flag"
ACPI: video: Force backlight native for Clevo NL5xRU and NL5xNU
arm64, topology: enable use of init_cpu_capacity_cppc()
arch_topology: obtain cpu capacity using information from CPPC
x86, ACPI: rename init_freq_invariance_cppc() to arch_init_invariance_cppc()
ACPI: AGDI: Add driver for Arm Generic Diagnostic Dump and Reset device
ACPI: tables: Add AGDI to the list of known table signatures
ACPI/APEI: Limit printable size of BERT table data
ACPI: docs: gpio-properties: Unify ASL style for GPIO examples
ACPI / x86: Work around broken XSDT on Advantech DAC-BJ01 board
ACPI: APEI: fix return value of __setup handlers
x86/ACPI: CPPC: Move init_freq_invariance_cppc() into x86 CPPC
x86: Expose init_freq_invariance() to topology header
x86/ACPI: CPPC: Move AMD maximum frequency ratio setting function into x86 CPPC
x86/ACPI: CPPC: Rename cppc_msr.c to cppc.c
ACPI / x86: Add skip i2c clients quirk for Lenovo Yoga Tablet 1050F/L
ACPI / x86: Add skip i2c clients quirk for Nextbook Ares 8
ACPICA: Avoid walking the ACPI Namespace if it is not there
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Merge ACPI power management changes, ACPI device properties handling
changes, x86-specific ACPI changes and miscellaneous ACPI changes for
5.18-rc1:
- Add power management debug messages related to suspend-to-idle in
two places (Rafael Wysocki).
- Fix __acpi_node_get_property_reference() return value and clean up
that function (Andy Shevchenko, Sakari Ailus).
- Fix return value of the __setup handler in the ACPI PM timer clock
source driver (Randy Dunlap).
- Clean up double words in two comments (Tom Rix).
- Add "skip i2c clients" quirks for Lenovo Yoga Tablet 1050F/L and
Nextbook Ares 8 (Hans de Goede).
- Clean up frequency invariance handling on x86 in the ACPI CPPC
library (Huang Rui).
- Work around broken XSDT on the Advantech DAC-BJ01 board (Mark
Cilissen).
* acpi-pm:
ACPI: EC / PM: Print additional debug message in acpi_ec_dispatch_gpe()
ACPI: PM: Print additional debug message in acpi_s2idle_wake()
* acpi-properties:
ACPI: property: Get rid of redundant 'else'
ACPI: properties: Consistently return -ENOENT if there are no more references
* acpi-misc:
clocksource: acpi_pm: fix return value of __setup handler
ACPI: clean up double words in two comments
* acpi-x86:
ACPI / x86: Work around broken XSDT on Advantech DAC-BJ01 board
x86/ACPI: CPPC: Move init_freq_invariance_cppc() into x86 CPPC
x86: Expose init_freq_invariance() to topology header
x86/ACPI: CPPC: Move AMD maximum frequency ratio setting function into x86 CPPC
x86/ACPI: CPPC: Rename cppc_msr.c to cppc.c
ACPI / x86: Add skip i2c clients quirk for Lenovo Yoga Tablet 1050F/L
ACPI / x86: Add skip i2c clients quirk for Nextbook Ares 8
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__setup() handlers should return 1 to obsolete_checksetup() in
init/main.c to indicate that the boot option has been handled.
A return of 0 causes the boot option/value to be listed as an Unknown
kernel parameter and added to init's (limited) environment strings.
The __setup() handler interface isn't meant to handle negative return
values -- they are non-zero, so they mean "handled" (like a return
value of 1 does), but that's just a quirk. So return 1 from
parse_pmtmr(). Also print a warning message if kstrtouint() returns
an error.
Fixes: 6b148507d3d0 ("pmtmr: allow command line override of ioport")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer and timekeeping updates from Thomas Gleixner:
"Core code:
- Make the NOHZ handling of the timekeeping/tick core more robust to
prevent a rare jiffies update stall.
- Handle softirqs in the NOHZ/idle case correctly
Drivers:
- Add support for event stream scaling of the 1GHz counter on ARM(64)
- Correct an error code check in the timer-of layer
- The usual cleanups and improvements all over the place"
* tag 'timers-core-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
lib/irq_poll: Declare IRQ_POLL softirq vector as ksoftirqd-parking safe
tick/rcu: Stop allowing RCU_SOFTIRQ in idle
tick/rcu: Remove obsolete rcu_needs_cpu() parameters
tick: Detect and fix jiffies update stall
clocksource/drivers/timer-of: Check return value of of_iomap in timer_of_base_init()
clocksource/drivers/timer-microchip-pit64b: Use 5MHz for clockevent
clocksource/drivers/timer-microchip-pit64b: Use notrace
clocksource/drivers/timer-microchip-pit64b: Remove mmio selection
dt-bindings: timer: Tegra: Convert text bindings to yaml
clocksource/drivers/imx-tpm: Move tpm_read_sched_clock() under CONFIG_ARM
clocksource/drivers/arm_arch_timer: Use event stream scaling when available
clocksource/drivers/exynos_mct: Increase the size of name array
clocksource/drivers/exynos_mct: Bump up mct max irq number
clocksource/drivers/exynos_mct: Remove mct interrupt index enum
clocksource/drivers/exynos_mct: Handle DTS with higher number of interrupts
clocksource/drivers/timer-ti-dm: Fix regression from errata i940 fix
clocksource/drivers/imx-tpm: Exclude sched clock for ARM64
clocksource: Add a Kconfig option for WATCHDOG_MAX_SKEW
clocksource/drivers/imx-tpm: Update name of clkevt
clocksource/drivers/imx-tpm: Add CLOCK_EVT_FEAT_DYNIRQ
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https://git.linaro.org/people/daniel.lezcano/linux into timers/core
Pull clocksource/events updates from Daniel Lezcano:
- Fix return error code check for the timer-of layer when getting
the base address (Guillaume Ranquet)
- Remove MMIO dependency, add notrace annotation for sched_clock
and increase the timer resolution for the Microchip
PIT64b (Claudiu Beznea)
- Convert DT bindings to yaml for the Tegra timer (David Heidelberg)
- Fix compilation error on architecture other than ARM for the
i.MX TPM (Nathan Chancellor)
- Add support for the event stream scaling for 1GHz counter on
the arch ARM timer (Marc Zyngier)
- Support a higher number of interrupts by the Exynos MCT timer
driver (Alim Akhtar)
- Detect and prevent memory corruption when the specified number
of interrupts in the DTS is greater than the array size in the
code for the Exynos MCT timer (Krzysztof Kozlowski)
- Fix regression from a previous errata fix on the TI DM
timer (Drew Fustini)
- Several fixes and code improvements for the i.MX TPM
driver (Peng Fan)
Link: https://lore.kernel.org/all/a8cd9be9-7d70-80df-2b74-1a8226a215e1@linaro.org
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timer_of_base_init()
of_base->base can either be iomapped using of_io_request_and_map() or
of_iomap() depending whether or not an of_base->name has been set.
Thus check of_base->base against NULL as of_iomap() does not return a
PTR_ERR() in case of error.
Fixes: 9aea417afa6b ("clocksource/drivers/timer-of: Don't request the resource by name")
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
Link: https://lore.kernel.org/r/20220307172656.4836-1-granquet@baylibre.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Use 5MHz clock for clockevent timers. This increases timer's
resolution.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220304133601.2404086-4-claudiu.beznea@microchip.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Use notrace for mchp_pit64b_sched_read_clk() to avoid recursive call of
prepare_ftrace_return() when issuing:
echo function_graph > /sys/kernel/debug/tracing/current_tracer
Fixes: 625022a5f160 ("clocksource/drivers/timer-microchip-pit64b: Add Microchip PIT64B support")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220304133601.2404086-3-claudiu.beznea@microchip.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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PIT64B timer driver doesn't depend on CLKSRC_MMIO since
commit e85c1d21b16b ("clocksource/drivers/timer-microchip-pit64b:
Add clocksource suspend/resume"). Remove the selection.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220304133601.2404086-2-claudiu.beznea@microchip.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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When building this driver for an architecture other than ARCH=arm:
drivers/clocksource/timer-imx-tpm.c:78:20: error: unused function 'tpm_read_sched_clock' [-Werror,-Wunused-function]
static u64 notrace tpm_read_sched_clock(void)
^
1 error generated.
Move the function definition under the existing CONFIG_ARM section so
there is no more warning.
Fixes: 10720e120e2b ("clocksource/drivers/imx-tpm: Exclude sched clock for ARM64")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20220303184212.2356245-1-nathan@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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With FEAT_ECV and the 1GHz counter, it is pretty likely that the
event stream divider doesn't fit in the field that holds the
divider value (we only have 4 bits to describe counter bits [15:0]
Thankfully, FEAT_ECV also provides a scaling mechanism to switch
the field to cover counter bits [23:8] instead.
Enable this on arm64 when ECV is available (32bit doesn't have
any detection infrastructure and is unlikely to be run on an
ARMv8.6 system anyway).
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220203170502.2694422-1-maz@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Variable _name_ hold mct_tick number per cpu and it is currently
limited to 10. Which restrict the scalability of the MCT driver for
the SoC which has more local timers interrupts (>= 12).
Increase the length of it to make mct_tick printed correctly for
each local timer interrupts per CPU.
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220221174547.26176-3-alim.akhtar@samsung.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Bump-up maximum number of MCT IRQ to match the binding
documentation. This make driver scalable for SoC which
has more than 12 timer irqs, like recently added FSD SoC.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20220221174547.26176-2-alim.akhtar@samsung.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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MCT driver define an enum which list global and local timer's
irq index. Most of them are not used but MCT_G0_IRQ and
MCT_L0_IRQ and these two are at a fixed offset/index.
Get rid of this enum and use a #define for the used irq index.
No functional changes expected.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20220221174547.26176-1-alim.akhtar@samsung.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The driver statically defines maximum number of interrupts it can
handle, however it does not respect that limit when configuring them.
When provided with a DTS with more interrupts than assumed, the driver
will overwrite static array mct_irqs leading to silent memory
corruption.
Validate the interrupts coming from DTS to avoid this. This does not
change the fact that such DTS might not boot at all, because it is
simply incompatible, however at least some warning will be printed.
Fixes: 36ba5d527e95 ("ARM: EXYNOS: add device tree support for MCT controller driver")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20220220103815.135380-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The existing fix for errata i940 causes a conflict for IPU2 which is
using timer 3 and 4. From arch/arm/boot/dts/dra7-ipu-dsp-common.dtsi:
&ipu2 {
mboxes = <&mailbox6 &mbox_ipu2_ipc3x>;
ti,timers = <&timer3>;
ti,watchdog-timers = <&timer4>, <&timer9>;
};
The conflict was noticed when booting mainline on the BeagleBoard X15
which has a TI AM5728 SoC:
remoteproc remoteproc1: 55020000.ipu is available
remoteproc remoteproc1: powering up 55020000.ipu
remoteproc remoteproc1: Booting fw image dra7-ipu2-fw.xem4
omap-rproc 55020000.ipu: could not get timer platform device
omap-rproc 55020000.ipu: omap_rproc_enable_timers failed: -19
remoteproc remoteproc1: can't start rproc 55020000.ipu: -19
This change modifies the errata fix to instead use timer 15 and 16 which
resolves the timer conflict.
It does not appear to introduce any latency regression. Results from
cyclictest with original errata fix using dmtimer 3 and 4:
# cyclictest --mlockall --smp --priority=80 --interval=200 --distance=0
policy: fifo: loadavg: 0.02 0.03 0.05
T: 0 ( 1449) P:80 I:200 C: 800368 Min: 0 Act: 32 Avg: 22 Max: 128
T: 1 ( 1450) P:80 I:200 C: 800301 Min: 0 Act: 12 Avg: 23 Max: 70
The results after the change to dmtimer 15 and 16:
# cyclictest --mlockall --smp --priority=80 --interval=200 --distance=0
policy: fifo: loadavg: 0.36 0.19 0.07
T: 0 ( 1711) P:80 I:200 C: 759599 Min: 0 Act: 6 Avg: 22 Max: 108
T: 1 ( 1712) P:80 I:200 C: 759539 Min: 0 Act: 19 Avg: 23 Max: 79
Fixes: 25de4ce5ed02 ("clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940")
Link: https://lore.kernel.org/linux-omap/YfWsG0p6to3IJuvE@x1/
Suggested-by: Suman Anna <s-anna@ti.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Drew Fustini <dfustini@baylibre.com>
Link: https://lore.kernel.org/r/20220204053503.1409162-1-dfustini@baylibre.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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For ARM64 platform such as i.MX8ULP which has ARMv8 generic timer as sched
clock, which is much faster compared with tpm sched clock. Reading the
tpm count register in i.MX8ULP requires about 290ns, this is slow and
introduce scheduler latency. So exclude tpm sched clock for ARM64
platform.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20220105124304.3567629-1-peng.fan@oss.nxp.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The tpm driver is not only for i.MX7ULP now, i.MX8ULP also use it. It
maybe also used by other i.MX variants, so update name to reflect it.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20211214120737.1611955-6-peng.fan@oss.nxp.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Add CLOCK_EVT_FEAT_DYNIRQ to allow the IRQ could be runtime set affinity
to the cores that needs wake up, otherwise saying core0 has to send
IPI to wakeup core1. With CLOCK_EVT_FEAT_DYNIRQ set, when broadcast
timer could wake up the cores, IPI is not needed.
Acked-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20211214120737.1611955-5-peng.fan@oss.nxp.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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counter_width and timer_base will not be updated after init, so mark
as __ro_after_init.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20211214120737.1611955-4-peng.fan@oss.nxp.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Per the Documentation,
IRQF_IRQPOLL is used for polling (only the interrupt that is registered
first in a shared interrupt is considered for performance reasons)
The TPM timer is not sharing interrupt with others, and pass irqpoll
not make sense for i.MX platform.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20211214120737.1611955-3-peng.fan@oss.nxp.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Per the Documentation,
IRQF_IRQPOLL is used for polling (only the interrupt that is registered
first in a shared interrupt is considered for performance reasons)
But this timer is not sharing interrupt line with others, and
actually irqpoll not work with this timer with IRQF_IRQPOLL set, so
drop the flag.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20211214120737.1611955-2-peng.fan@oss.nxp.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Devkit8000 board seems to always used 32k_counter as clocksource.
Restore this behavior.
If clocksource is back to 32k_counter, timer12 is now the clockevent
source (as before) and timer2 is not longer needed here.
This commit fixes the same issue observed with commit 23885389dbbb
("ARM: dts: Fix timer regression for beagleboard revision c") when sleep
is blocked until hitting keys over serial console.
Fixes: aba1ad05da08 ("clocksource/drivers/timer-ti-dm: Add clockevent and clocksource support")
Fixes: e428e250fde6 ("ARM: dts: Configure system timers for omap3")
Signed-off-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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