The initial idea of making them const was correct as they were seperate
instances. When they got embedded into larger data structures, which are
even modified by the callback this got moot. The only reason why this went
unnoticed is that the required container_of() casts the const attribute
forcefully away.
Stop pretending that it is const.
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Merge tag 'timers-cleanups-2025-07-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer cleanups from Thomas Gleixner:
"A treewide cleanup of struct cycle_counter const annotations.
The initial idea of making them const was correct as they were
seperate instances. When they got embedded into larger data
structures, which are even modified by the callback this got moot. The
only reason why this went unnoticed is that the required
container_of() casts the const attribute forcefully away.
Stop pretending that it is const"
* tag 'timers-cleanups-2025-07-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time/timecounter: Fix the lie that struct cyclecounter is const
- Introduce and start using TRAILING_OVERLAP() helper for fixing
embedded flex array instances (Gustavo A. R. Silva)
- mux: Convert mux_control_ops to a flex array member in mux_chip
(Thorsten Blum)
- string: Group str_has_prefix() and strstarts() (Andy Shevchenko)
- Remove KCOV instrumentation from __init and __head (Ritesh Harjani,
Kees Cook)
- Refactor and rename stackleak feature to support Clang
- Add KUnit test for seq_buf API
- Fix KUnit fortify test under LTO
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Merge tag 'hardening-v6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening updates from Kees Cook:
- Introduce and start using TRAILING_OVERLAP() helper for fixing
embedded flex array instances (Gustavo A. R. Silva)
- mux: Convert mux_control_ops to a flex array member in mux_chip
(Thorsten Blum)
- string: Group str_has_prefix() and strstarts() (Andy Shevchenko)
- Remove KCOV instrumentation from __init and __head (Ritesh Harjani,
Kees Cook)
- Refactor and rename stackleak feature to support Clang
- Add KUnit test for seq_buf API
- Fix KUnit fortify test under LTO
* tag 'hardening-v6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (22 commits)
sched/task_stack: Add missing const qualifier to end_of_stack()
kstack_erase: Support Clang stack depth tracking
kstack_erase: Add -mgeneral-regs-only to silence Clang warnings
init.h: Disable sanitizer coverage for __init and __head
kstack_erase: Disable kstack_erase for all of arm compressed boot code
x86: Handle KCOV __init vs inline mismatches
arm64: Handle KCOV __init vs inline mismatches
s390: Handle KCOV __init vs inline mismatches
arm: Handle KCOV __init vs inline mismatches
mips: Handle KCOV __init vs inline mismatch
powerpc/mm/book3s64: Move kfence and debug_pagealloc related calls to __init section
configs/hardening: Enable CONFIG_INIT_ON_FREE_DEFAULT_ON
configs/hardening: Enable CONFIG_KSTACK_ERASE
stackleak: Split KSTACK_ERASE_CFLAGS from GCC_PLUGINS_CFLAGS
stackleak: Rename stackleak_track_stack to __sanitizer_cov_stack_depth
stackleak: Rename STACKLEAK to KSTACK_ERASE
seq_buf: Introduce KUnit tests
string: Group str_has_prefix() and strstarts()
kunit/fortify: Add back "volatile" for sizeof() constants
acpi: nfit: intel: avoid multiple -Wflex-array-member-not-at-end warnings
...
When KCOV is enabled all functions get instrumented, unless
the __no_sanitize_coverage attribute is used. To prepare for
__no_sanitize_coverage being applied to __init functions, we have to
handle differences in how GCC's inline optimizations get resolved. For
arm this exposed several places where __init annotations were missing
but ended up being "accidentally correct". Fix these cases and force
several functions to be inline with __always_inline.
Acked-by: Nishanth Menon <nm@ti.com>
Acked-by: Lee Jones <lee@kernel.org>
Reviewed-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20250717232519.2984886-5-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
Fix below warning in Hyper-V clocksource driver that comes when kernel
is compiled with W=1 option. Include export.h in driver files to fix it.
* warning: EXPORT_SYMBOL() is used, but #include <linux/export.h>
is missing
Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
Reviewed-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Link: https://lore.kernel.org/r/20250611100459.92900-5-namjain@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250611100459.92900-5-namjain@linux.microsoft.com>
In both the read callback for struct cyclecounter, and in struct
timecounter, struct cyclecounter is declared as a const pointer.
Unfortunatly, a number of users of this pointer treat it as a non-const
pointer as it is burried in a larger structure that is heavily modified by
the callback function when accessed. This lie had been hidden by the fact
that container_of() "casts away" a const attribute of a pointer without any
compiler warning happening at all.
Fix this all up by removing the const attribute in the needed places so
that everyone can see that the structure really isn't const, but can,
and is, modified by the users of it.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/2025070124-backyard-hurt-783a@gregkh
* Samsung Exynos ACPM:
* Populate child platform devices from device tree data
* Introduce a new API, `devm_acpm_get_by_node()`, for child devices to get the ACPM handle
* ROHM PMICs:
* Add support for the ROHM BD96802 scalable companion PMIC to the BD96801 core driver
* Add support for controlling the BD96802 using the BD96801 regulator driver
* Add support to the BD96805, which is almost identical to the BD96801
* Add support to the BD96806, which is similar to the BD96802
* Maxim MAX77759:
* Add a core driver for the MAX77759 companion PMIC
* Add a GPIO driver for the expander functions on the MAX77759
* Add an NVMEM driver to expose the non-volatile memory on the MAX77759
* STMicroelectronics STM32MP25:
* Add support for the STM32MP25 SoC to the stm32-lptimer
* Add support for the STM32MP25 to the clocksource driver, handling new register access requirements
* Add support for the STM32MP25 to the PWM driver, enabling up to two PWM outputs
* Broadcom BCM590xx:
* Add support for the BCM59054 PMU
* Parse the PMU ID and revision to support behavioral differences between chip revisions
* Add regulator support for the BCM59054
* Samsung S2MPG10:
* Add support for the S2MPG10 PMIC, which communicates via the Samsung ACPM firmware instead of I2C
* Exynos ACPM:
* Improve timeout detection reliability by using ktime APIs instead of a loop counter assumption
* Allow PMIC access during late system shutdown by switching to `udelay()` instead of a sleeping function
* Fix an issue where reading command results longer than 8 bytes would fail
* Silence non-error `-EPROBE_DEFER` messages during boot to clean up logs
* Exynos LPASS:
* Fix an error handling path by switching to `devm_regmap_init_mmio()` to prevent resource leaks
* Fix a bug where `exynos_lpass_disable()` was called twice in the remove function
* Fix another resource leak in the probe's error path by using `devm_add_action_or_reset()`
* Samsung SEC:
* Handle the s2dos05, which does not have IRQ support, explicitly to prevent warnings
* Fix the core driver to correctly handle errors from `sec_irq_init()` instead of ignoring them
* STMPE-SPI:
* Correct an undeclared identifier in the `MODULE_DEVICE_TABLE` macro
* MAINTAINERS:
* Adjust a file path for the Siemens IPC LED drivers entry to fix a broken reference
* Maxim Drivers:
* Correct the spelling of "Electronics" in Samsung copyright headers across multiple files
* General:
* Fix wakeup source memory leaks on device unbind for 88pm886, as3722, max14577, max77541, max77705,
max8925, rt5033, and sprd-sc27xx drivers
* Samsung SEC Drivers:
* Split the driver into a transport-agnostic core (`sec-core`) and transport-specific (`sec-i2c`,
`sec-acpm`) modules to support non-I2C devices
* Merge the `sec-core` and `sec-irq` modules to reduce memory consumption
* Move internal APIs to a private header to clean up the public API
* Improve code style by sorting includes, cleaning up headers, sorting device tables, and using helper
macros like `dev_err_probe()`, `MFD_CELL`, and `REGMAP_IRQ_REG`
* Make regmap configuration for s2dos05/s2mpu05 explicit to improve clarity
* Rework platform data and regmap instantiation to use OF match data instead of a large switch statement
* ROHM BD96801/2:
* Prepare the driver for new models by separating chip-specific data into its own structure
* Drop IC name prefix from IRQ resource names in both the MFD and regulator drivers for simplification
* Broadcom BCM590xx:
* Refactor the regulator driver to store descriptions in a table to ease support for new chips
* Rename BCM59056-specific data to prepare for the addition of other regulators
* Use `dev_err_probe()` for cleaner error handling
* Exynos ACPM:
* Correct kerneldoc warnings and use the conventional 'np' argument name
* General MFD:
* Convert `aat2870` and `tps65010` to use the per-client debugfs directory provided by the I2C core
* Convert `sm501`, `tps65010` and `ucb1x00` to use the new GPIO line value setter callbacks
* Constify `regmap_irq_chip` and other structures in `88pm886` to move data to read-only sections
* BCM590xx:
* Drop the unused "id" member from the `bcm590xx` struct in preparation for a replacement
* Samsung SEC Core:
* Remove forward declarations for functions that no longer exist
* SM501:
* Remove the unused `sm501_find_clock()` function
* New Compatibles:
* Google: Add a PMIC child node to the `google,gs101-acpm-ipc` binding
* ROHM: Add new bindings for `rohm,bd96802-regulator` and `rohm,bd96802-pmic`, and add compatibles
for BD96805 and BD96806
* Maxim: Add new bindings for `maxim,max77759-gpio`, `maxim,max77759-nvmem`, and the top-level
`maxim,max77759`
* STM: Add `stm32mp25` compatible to the `stm32-lptimer` binding
* Broadcom: Add `bcm59054` compatible
* Atmel/Microchip: Add `microchip,sama7d65-gpbr` and `microchip,sama7d65-secumod` compatibles
* Samsung: Add `s2mpg10` compatible to the `samsung,s2mps11` MFD binding
* MediaTek: Add compatibles for `mt6893` (scpsys), `mt7988-topmisc`, and `mt8365-infracfg-nao`
* Qualcomm: Add `qcom,apq8064-mmss-sfpb` and `qcom,apq8064-sps-sic` syscon compatibles
* Refactoring & Cleanup:
* Convert Broadcom BCM59056 devicetree bindings to YAML and split them into MFD and regulator parts
* Convert the Microchip AT91 secumod binding to YAML
* Drop unrelated consumer nodes from binding examples to reduce bloat
* Correct indentation and style in various DTS examples
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Merge tag 'mfd-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"Samsung Exynos ACPM:
- Populate child platform devices from device tree data
- Introduce a new API, 'devm_acpm_get_by_node()', for child devices
to get the ACPM handle
ROHM PMICs:
- Add support for the ROHM BD96802 scalable companion PMIC to the
BD96801 core driver
- Add support for controlling the BD96802 using the BD96801 regulator
driver
- Add support to the BD96805, which is almost identical to the
BD96801
- Add support to the BD96806, which is similar to the BD96802
Maxim MAX77759:
- Add a core driver for the MAX77759 companion PMIC
- Add a GPIO driver for the expander functions on the MAX77759
- Add an NVMEM driver to expose the non-volatile memory on the
MAX77759
STMicroelectronics STM32MP25:
- Add support for the STM32MP25 SoC to the stm32-lptimer
- Add support for the STM32MP25 to the clocksource driver, handling
new register access requirements
- Add support for the STM32MP25 to the PWM driver, enabling up to two
PWM outputs
Broadcom BCM590xx:
- Add support for the BCM59054 PMU
- Parse the PMU ID and revision to support behavioral differences
between chip revisions
- Add regulator support for the BCM59054
Samsung S2MPG10:
- Add support for the S2MPG10 PMIC, which communicates via the
Samsung ACPM firmware instead of I2C
Exynos ACPM:
- Improve timeout detection reliability by using ktime APIs instead
of a loop counter assumption
- Allow PMIC access during late system shutdown by switching to
'udelay()' instead of a sleeping function
- Fix an issue where reading command results longer than 8 bytes
would fail
- Silence non-error '-EPROBE_DEFER' messages during boot to clean up
logs
Exynos LPASS:
- Fix an error handling path by switching to
'devm_regmap_init_mmio()' to prevent resource leaks
- Fix a bug where 'exynos_lpass_disable()' was called twice in the
remove function
- Fix another resource leak in the probe's error path by using
'devm_add_action_or_reset()'
Samsung SEC:
- Handle the s2dos05, which does not have IRQ support, explicitly to
prevent warnings
- Fix the core driver to correctly handle errors from
'sec_irq_init()' instead of ignoring them
STMPE-SPI:
- Correct an undeclared identifier in the 'MODULE_DEVICE_TABLE' macro
MAINTAINERS:
- Adjust a file path for the Siemens IPC LED drivers entry to fix a
broken reference
Maxim Drivers:
- Correct the spelling of "Electronics" in Samsung copyright headers
across multiple files
General:
- Fix wakeup source memory leaks on device unbind for 88pm886,
as3722, max14577, max77541, max77705, max8925, rt5033, and
sprd-sc27xx drivers
Samsung SEC Drivers:
- Split the driver into a transport-agnostic core ('sec-core') and
transport-specific ('sec-i2c', 'sec-acpm') modules to support
non-I2C devices
- Merge the 'sec-core' and 'sec-irq' modules to reduce memory
consumption
- Move internal APIs to a private header to clean up the public API
- Improve code style by sorting includes, cleaning up headers,
sorting device tables, and using helper macros like
'dev_err_probe()', 'MFD_CELL', and 'REGMAP_IRQ_REG'
- Make regmap configuration for s2dos05/s2mpu05 explicit to improve
clarity
- Rework platform data and regmap instantiation to use OF match data
instead of a large switch statement
ROHM BD96801/2:
- Prepare the driver for new models by separating chip-specific data
into its own structure
- Drop IC name prefix from IRQ resource names in both the MFD and
regulator drivers for simplification
Broadcom BCM590xx:
- Refactor the regulator driver to store descriptions in a table to
ease support for new chips
- Rename BCM59056-specific data to prepare for the addition of other
regulators
- Use 'dev_err_probe()' for cleaner error handling
Exynos ACPM:
- Correct kerneldoc warnings and use the conventional 'np' argument
name
General MFD:
- Convert 'aat2870' and 'tps65010' to use the per-client debugfs
directory provided by the I2C core
- Convert 'sm501', 'tps65010' and 'ucb1x00' to use the new GPIO line
value setter callbacks
- Constify 'regmap_irq_chip' and other structures in '88pm886' to
move data to read-only sections
BCM590xx:
- Drop the unused "id" member from the 'bcm590xx' struct in
preparation for a replacement
Samsung SEC Core:
- Remove forward declarations for functions that no longer exist
SM501:
- Remove the unused 'sm501_find_clock()' function
New Compatibles:
- Google: Add a PMIC child node to the 'google,gs101-acpm-ipc'
binding
- ROHM: Add new bindings for 'rohm,bd96802-regulator' and
'rohm,bd96802-pmic', and add compatibles for BD96805 and BD96806
- Maxim: Add new bindings for 'maxim,max77759-gpio',
'maxim,max77759-nvmem', and the top-level 'maxim,max77759'
- STM: Add 'stm32mp25' compatible to the 'stm32-lptimer' binding
- Broadcom: Add 'bcm59054' compatible
- Atmel/Microchip: Add 'microchip,sama7d65-gpbr' and
'microchip,sama7d65-secumod' compatibles
- Samsung: Add 's2mpg10' compatible to the 'samsung,s2mps11' MFD
binding
- MediaTek: Add compatibles for 'mt6893' (scpsys), 'mt7988-topmisc',
and 'mt8365-infracfg-nao'
- Qualcomm: Add 'qcom,apq8064-mmss-sfpb' and 'qcom,apq8064-sps-sic'
syscon compatibles
Refactoring & Cleanup:
- Convert Broadcom BCM59056 devicetree bindings to YAML and split
them into MFD and regulator parts
- Convert the Microchip AT91 secumod binding to YAML
- Drop unrelated consumer nodes from binding examples to reduce bloat
- Correct indentation and style in various DTS examples"
* tag 'mfd-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (81 commits)
mfd: maxim: Correct Samsung "Electronics" spelling in copyright headers
mfd: maxim: Correct Samsung "Electronics" spelling in headers
mfd: sm501: Remove unused sm501_find_clock
mfd: 88pm886: Constify struct regmap_irq_chip and some other structures
dt-bindings: mfd: syscon: Add mediatek,mt8365-infracfg-nao
mfd: sprd-sc27xx: Fix wakeup source leaks on device unbind
mfd: rt5033: Fix wakeup source leaks on device unbind
mfd: max8925: Fix wakeup source leaks on device unbind
mfd: max77705: Fix wakeup source leaks on device unbind
mfd: max77541: Fix wakeup source leaks on device unbind
mfd: max14577: Fix wakeup source leaks on device unbind
mfd: as3722: Fix wakeup source leaks on device unbind
mfd: 88pm886: Fix wakeup source leaks on device unbind
dt-bindings: mfd: Correct indentation and style in DTS example
dt-bindings: mfd: Drop unrelated nodes from DTS example
dt-bindings: mfd: syscon: Add qcom,apq8064-sps-sic
dt-bindings: mfd: syscon: Add qcom,apq8064-mmss-sfpb
mfd: stmpe-spi: Correct the name used in MODULE_DEVICE_TABLE
dt-bindings: mfd: syscon: Add mt7988-topmisc
mfd: exynos-lpass: Fix another error handling path in exynos_lpass_probe()
...
- The final conversion of text formatted device tree binding to schemas.
- A new driver fot the System Timer Module on S32G NXP SoCs.
- A new driver fot the Econet HPT timer
- The usual improvements and device tree binding updates
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Merge tag 'timers-clocksource-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull clocksource updates from Thomas Gleixner:
"Updates for clocksource/clockevent drivers:
- The final conversion of text formatted device tree binding to
schemas
- A new driver fot the System Timer Module on S32G NXP SoCs
- A new driver fot the Econet HPT timer
- The usual improvements and device tree binding updates"
* tag 'timers-clocksource-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
clocksource/drivers/renesas-ostm: Unconditionally enable reprobe support
dt-bindings: timer: renesas,ostm: Document RZ/V2N (R9A09G056) support
dt-bindings: timer: Convert marvell,armada-370-timer to DT schema
dt-bindings: timer: Convert ti,keystone-timer to DT schema
dt-bindings: timer: Convert st,spear-timer to DT schema
dt-bindings: timer: Convert socionext,milbeaut-timer to DT schema
dt-bindings: timer: Convert snps,arc-timer to DT schema
dt-bindings: timer: Convert snps,archs-rtc to DT schema
dt-bindings: timer: Convert snps,archs-gfrc to DT schema
dt-bindings: timer: Convert lsi,zevio-timer to DT schema
dt-bindings: timer: Convert jcore,pit to DT schema
dt-bindings: timer: Convert img,pistachio-gptimer to DT schema
dt-bindings: timer: Convert ezchip,nps400-timer to DT schema
dt-bindings: timer: Convert cirrus,clps711x-timer to DT schema
dt-bindings: timer: Convert altr,timer-1.0 to DT schema
dt-bindings: timer: Add ESWIN EIC7700 CLINT
clocksource/drivers: Add EcoNet Timer HPT driver
dt-bindings: timer: Add EcoNet EN751221 "HPT" CPU Timer
dt-bindings: timer: Convert arm,mps2-timer to DT schema
dt-bindings: timer: Add Sophgo SG2044 ACLINT timer
...
Previously, the OSTM driver's platform probe path was only enabled for
selected SoCs (e.g., RZ/G2L and RZ/V2H) due to issues on RZ/Ax (ARM32)
SoCs, which encountered IRQ conflicts like:
/soc/timer@e803b000: used for clock events
genirq: Flags mismatch irq 16. 00215201 (timer@e803c000) vs. 00215201 (timer@e803c000)
Failed to request irq 16 for /soc/timer@e803c000
renesas_ostm e803c000.timer: probe with driver renesas_ostm failed with error -16
These issues have since been resolved by commit 37385c0772
("clocksource/drivers/renesas-ostm: Avoid reprobe after successful early
probe"), which prevents reprobe on successfully initialized early timers.
With this fix in place, there is no longer a need to restrict platform
probing based on SoC-specific configs. This change unconditionally enables
reprobe support for all SoCs, simplifying the logic and avoiding the need
to update the configuration for every new Renesas SoC with OSTM.
Additionally, the `ostm_of_table` is now marked with `__maybe_unused` to
fix a build warning when `CONFIG_OF` is disabled.
RZ/A1 and RZ/A2 remain unaffected with this change.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20250515182207.329176-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Introduce a clocksource driver for the so-called high-precision timer (HPT)
in the EcoNet EN751221 and EN751627 MIPS SoCs.
It's a 32 bit upward-counting one-shot timer which relies on the crystal so it
is unaffected by CPU power mode. On MIPS 34K devices (single core) there is
one timer, and on 1004K devices (dual core) there are two.
Each timer has two sets of count/compare registers so that there is one for
each of the VPEs on the core. Because each core has 2 VPEs, register selection
takes the CPU number / 2 for the timer corrisponding to the core, then CPU
number % 2 for the register corrisponding to the VPE.
These timers use a percpu-devid IRQ to route interrupts to the VPE which set
the event.
Signed-off-by: Caleb James DeLisle <cjd@cjdns.fr>
Link: https://lore.kernel.org/r/20250507134500.390547-3-cjd@cjdns.fr
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The intention to keep the unsed if(0) block is gone now. Remove
them for clean codes.
Signed-off-by: robelin <robelin@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20250507044311.3751033-4-robelin@nvidia.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This change removes watchdog self-pinging behavior.
The timer irq handler is triggered due to the 1st expiration,
the handler disables and enables watchdog but also implicitly
clears the expiration count so the count can only be 0 or 1.
Since this watchdog supports opened, configured, or pinged by
systemd, We remove this behavior or the watchdog may not bark
when systemd crashes since the 5th expiration never comes.
Signed-off-by: Pohsun Su <pohsuns@nvidia.com>
Signed-off-by: Robert Lin <robelin@nvidia.com>
Link: https://lore.kernel.org/r/20250507044311.3751033-3-robelin@nvidia.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This change adds support for WDIOC_GETTIMELEFT so userspace
programs can get the number of seconds before system reset by
the watchdog timer via ioctl.
Signed-off-by: Pohsun Su <pohsuns@nvidia.com>
Signed-off-by: Robert Lin <robelin@nvidia.com>
Link: https://lore.kernel.org/r/20250507044311.3751033-2-robelin@nvidia.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Build-testing this driver on arm without CONFIG_OF produces a warning:
drivers/clocksource/timer-atmel-tcb.c:368:34: error: 'atmel_tcb_of_match' defined but not used [-Werror=unused-const-variable=]
368 | static const struct of_device_id atmel_tcb_of_match[] = {
| ^~~~~~~~~~~~~~~~~~
Change the dependency to require CONFIG_OF for build testing to
avoid the warning. Testing remains possible on all architectures
as CONFIG_OF is user-selectable.
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20250409155313.1096915-1-arnd@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
STM supports commonly required system and application software timing
functions. STM includes a 32-bit count-up timer and four 32-bit
compare channels with a separate interrupt source for each
channel. The timer is driven by the STM module clock divided by an
8-bit prescale value (1 to 256).
STM has the following features:
• One 32-bit count-up timer with an 8-bit prescaler
• Four 32-bit compare channels
• An independent interrupt source for each channel
• Ability to stop the timer in Debug mode
The s32g platform is declined into two versions, the s32g2 and the
s32g3. The former has a STM block with 8 timers and the latter has 12
timers.
The platform is designed to have one usable STM instance per core on
the system which is composed of 3 x Cortex-M3 + 4 Cortex-A53 for the
s32g2 and 3 x Cortex-M3 + 8 Cortex-A53 for the s32g3.
There is a special STM instance called STM_TS which is dedicated to
the timestamp. The 7th STM instance STM_07 is directly tied to the
STM_TS which means it is not usable as a clockevent.
The driver instantiate each STM described in the device tree as a
clocksource and a clockevent conforming to the reference manual even
if the Linux system does not use all of the clocksource. Each
clockevent will have a cpumask set for a specific CPU.
Given the counter is shared between the clocksource and the
clockevent, the STM module can not be disabled by one or another so
the refcounting mechanism is used to stop the counter when it reaches
zero and to start it when it is one. The suspend and resume relies on
the refcount to stop the module.
As the device tree will have multiple STM entries, the driver can be
probed in parallel with the async option but it is not enabled
yet. However, the driver code takes care of preventing a race by
putting a lock to protect the number of STM instances global variable
which means it is ready to support the option when enough testing will
be done with the underlying time framework.
Cc: Ghennadi Procopciuc <ghennadi.procopciuc@oss.nxp.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Thomas Fossati <thomas.fossati@linaro.org>
Suggested-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
Link: https://lore.kernel.org/r/20250417151623.121109-3-daniel.lezcano@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
On stm32mp25, DIER (former IER) must only be modified when the lptimer
is enabled. On earlier SoCs, it must be only be modified when it is
disabled. There's also a new DIEROK flag, to ensure register access
has completed.
Add a new "set_evt" routine to be used on stm32mp25, called depending
on the version register, read by the MFD core (LPTIM_VERR).
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20250429125133.1574167-4-fabrice.gasnier@foss.st.com
Signed-off-by: Lee Jones <lee@kernel.org>
On x86 during boot, clockevent_i8253_disable() can be invoked via
x86_late_time_init -> hpet_time_init() -> pit_timer_init() which happens
with enabled interrupts.
If some of the old i8253 hardware is actually used then lockdep will notice
that i8253_lock is used in hard interrupt context. This causes lockdep to
complain because it observed the lock being acquired with interrupts
enabled and in hard interrupt context.
Make clockevent_i8253_disable() acquire the lock with
raw_spinlock_irqsave() to cure this.
[ tglx: Massage change log and use guard() ]
Fixes: c8c4076723 ("x86/timer: Skip PIT initialization on modern chipsets")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20250404133116.p-XRWJXf@linutronix.de
* The sub-architecture selection Kconfig system has been cleaned up,
the documentation has been improved, and various detections have been
fixed.
* The vector-related extensions dependencies are now validated when
parsing from device tree and in the DT bindings.
* Misaligned access probing can be overridden via a kernel command-line
parameter, along with various fixes to misalign access handling.
* Support for relocatable !MMU kernels builds.
* Support for hpge pfnmaps, which should improve TLB utilization.
* Support for runtime constants, which improves the d_hash()
performance.
* Support for bfloat16, Zicbom, Zaamo, Zalrsc, Zicntr, Zihpm.
* Various fixes, including:
- We were missing a secondary mmu notifier call when flushing the
tlb which is required for IOMMU.
- Fix ftrace panics by saving the registers as expected by ftrace.
- Fix a couple of stimecmp usage related to cpu hotplug.
- purgatory_start is now aligned as per the STVEC requirements.
- A fix for hugetlb when calculating the size of non-present PTEs.
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Merge tag 'riscv-for-linus-6.15-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt:
- The sub-architecture selection Kconfig system has been cleaned up,
the documentation has been improved, and various detections have been
fixed
- The vector-related extensions dependencies are now validated when
parsing from device tree and in the DT bindings
- Misaligned access probing can be overridden via a kernel command-line
parameter, along with various fixes to misalign access handling
- Support for relocatable !MMU kernels builds
- Support for hpge pfnmaps, which should improve TLB utilization
- Support for runtime constants, which improves the d_hash()
performance
- Support for bfloat16, Zicbom, Zaamo, Zalrsc, Zicntr, Zihpm
- Various fixes, including:
- We were missing a secondary mmu notifier call when flushing the
tlb which is required for IOMMU
- Fix ftrace panics by saving the registers as expected by ftrace
- Fix a couple of stimecmp usage related to cpu hotplug
- purgatory_start is now aligned as per the STVEC requirements
- A fix for hugetlb when calculating the size of non-present PTEs
* tag 'riscv-for-linus-6.15-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (65 commits)
riscv: Add norvc after .option arch in runtime const
riscv: Make sure toolchain supports zba before using zba instructions
riscv/purgatory: 4B align purgatory_start
riscv/kexec_file: Handle R_RISCV_64 in purgatory relocator
selftests: riscv: fix v_exec_initval_nolibc.c
riscv: Fix hugetlb retrieval of number of ptes in case of !present pte
riscv: print hartid on bringup
riscv: Add norvc after .option arch in runtime const
riscv: Remove CONFIG_PAGE_OFFSET
riscv: Support CONFIG_RELOCATABLE on riscv32
asm-generic: Always define Elf_Rel and Elf_Rela
riscv: Support CONFIG_RELOCATABLE on NOMMU
riscv: Allow NOMMU kernels to access all of RAM
riscv: Remove duplicate CONFIG_PAGE_OFFSET definition
RISC-V: errata: Use medany for relocatable builds
dt-bindings: riscv: document vector crypto requirements
dt-bindings: riscv: add vector sub-extension dependencies
dt-bindings: riscv: d requires f
RISC-V: add f & d extension validation checks
RISC-V: add vector crypto extension validation checks
...
Added quirks for enabling multi-cluster mode on EyeQ6
Added DTS clocks for ralink
Cleanup realtek DTS
Other cleanups and fixes
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Merge tag 'mips_6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Pull MIPS updates from Thomas Bogendoerfer:
- Add support for multi-cluster configuration
- Add quirks for enabling multi-cluster mode on EyeQ6
- Add DTS clocks for ralink
- Cleanup realtek DTS
- Other cleanups and fixes
* tag 'mips_6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (35 commits)
MIPS: config: omega2+, vocore2: enable CLK_MTMIPS
arch: mips: defconfig: Drop obsolete CONFIG_NET_CLS_TCINDEX
MIPS: cm: Fix warning if MIPS_CM is disabled
MIPS: Fix Macro name
MIPS: ds1287: Match ds1287_set_base_clock() function types
MIPS: cevt-ds1287: Add missing ds1287.h include
MIPS: dec: Declare which_prom() as static
MIPS: Loongson2ef: Replace deprecated strncpy() with strscpy()
mips: dts: ralink: mt7628a: update system controller node and its consumers
mips: dts: ralink: mt7620a: update system controller node and its consumers
mips: dts: ralink: rt3883: update system controller node and its consumers
mips: dts: ralink: rt3050: update system controller node and its consumers
mips: dts: ralink: rt2880: update system controller node and its consumers
dt-bindings: clock: add clock definitions for Ralink SoCs
MIPS: Use arch specific syscall name match function
mips: dts: realtek: Add restart to Cisco SG220-26P
mips: dts: realtek: Add RTL838x SoC peripherals
mips: dts: realtek: Replace uart clock property
mips: dts: realtek: Correct uart interrupt-parent
mips: dts: realtek: Add SoC IRQ node for RTL838x
...
- Add support for suspend/resume in the STM32 LP-Timer driver with a
follow up fix, which uses the proper method to setup the timer as a
optional wakeup source instead of trying to force it as mandatory
wakeup source.
- The usual device tree updates to enable new SoC models in existing
drivers.
- Trivial spelling, style and indentation fixes
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Merge tag 'timers-clocksource-2025-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull clocksource/event updates from Thomas Gleixner:
- Add support for suspend/resume in the STM32 LP-Timer driver with a
follow up fix, which uses the proper method to setup the timer as a
optional wakeup source instead of trying to force it as mandatory
wakeup source.
- The usual device tree updates to enable new SoC models in existing
drivers.
- Trivial spelling, style and indentation fixes
* tag 'timers-clocksource-2025-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
dt-bindings: timer: Add SiFive CLINT2
clocksource/drivers/stm32-lptimer: Use wakeup capable instead of init wakeup
clocksource/drivers/exynos_mct: Fixed a spelling error
clocksource/drivers/stm32-lptimer: Add support for suspend / resume
dt-bindings: timer: exynos4210-mct: add samsung,exynos2200-mct-peris compatible
dt-bindings: timer: exynos4210-mct: Add samsung,exynos990-mct compatible
dt-bindings: timer: Correct indentation and style in DTS example
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Merge tag 'hyperv-next-signed-20250324' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull hyperv updates from Wei Liu:
- Add support for running as the root partition in Hyper-V (Microsoft
Hypervisor) by exposing /dev/mshv (Nuno and various people)
- Add support for CPU offlining in Hyper-V (Hamza Mahfooz)
- Misc fixes and cleanups (Roman Kisel, Tianyu Lan, Wei Liu, Michael
Kelley, Thorsten Blum)
* tag 'hyperv-next-signed-20250324' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (24 commits)
x86/hyperv: fix an indentation issue in mshyperv.h
x86/hyperv: Add comments about hv_vpset and var size hypercall input args
Drivers: hv: Introduce mshv_root module to expose /dev/mshv to VMMs
hyperv: Add definitions for root partition driver to hv headers
x86: hyperv: Add mshv_handler() irq handler and setup function
Drivers: hv: Introduce per-cpu event ring tail
Drivers: hv: Export some functions for use by root partition module
acpi: numa: Export node_to_pxm()
hyperv: Introduce hv_recommend_using_aeoi()
arm64/hyperv: Add some missing functions to arm64
x86/mshyperv: Add support for extended Hyper-V features
hyperv: Log hypercall status codes as strings
x86/hyperv: Fix check of return value from snp_set_vmsa()
x86/hyperv: Add VTL mode callback for restarting the system
x86/hyperv: Add VTL mode emergency restart callback
hyperv: Remove unused union and structs
hyperv: Add CONFIG_MSHV_ROOT to gate root partition support
hyperv: Change hv_root_partition into a function
hyperv: Convert hypercall statuses to linux error codes
drivers/hv: add CPU offlining support
...
* kvm-arm64/pv-cpuid:
: Paravirtualized implementation ID, courtesy of Shameer Kolothum
:
: Big-little has historically been a pain in the ass to virtualize. The
: implementation ID (MIDR, REVIDR, AIDR) of a vCPU can change at the whim
: of vCPU scheduling. This can be particularly annoying when the guest
: needs to know the underlying implementation to mitigate errata.
:
: "Hyperscalers" face a similar scheduling problem, where VMs may freely
: migrate between hosts in a pool of heterogenous hardware. And yes, our
: server-class friends are equally riddled with errata too.
:
: In absence of an architected solution to this wart on the ecosystem,
: introduce support for paravirtualizing the implementation exposed
: to a VM, allowing the VMM to describe the pool of implementations that a
: VM may be exposed to due to scheduling/migration.
:
: Userspace is expected to intercept and handle these hypercalls using the
: SMCCC filter UAPI, should it choose to do so.
smccc: kvm_guest: Fix kernel builds for 32 bit arm
KVM: selftests: Add test for KVM_REG_ARM_VENDOR_HYP_BMAP_2
smccc/kvm_guest: Enable errata based on implementation CPUs
arm64: Make _midr_in_range_list() an exported function
KVM: arm64: Introduce KVM_REG_ARM_VENDOR_HYP_BMAP_2
KVM: arm64: Specify hypercall ABI for retrieving target implementations
arm64: Modify _midr_range() functions to read MIDR/REVIDR internally
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Nick Hu <nick.hu@sifive.com> says:
When the cpu is going to be hotplug, stop the stimecmp to prevent pending
interrupt.
When the cpu is going to be suspended, save the stimecmp before entering
the suspend state and restore it in the resume path.
* patches from https://lore.kernel.org/r/20250219114135.27764-1-nick.hu@sifive.com:
clocksource/drivers/timer-riscv: Stop stimecmp when cpu hotplug
riscv: Add stimecmp save and restore
Link: https://lore.kernel.org/r/20250219114135.27764-1-nick.hu@sifive.com
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Add support for power management on STM32 LPTIMER clocksource driver:
- Upon clockevents_suspend(), shutdown the LPTIMER, and balance the
clk_prepare_enable() from the probe routine.
- Upon clockevents_resume(), restore the prescaler that may have been lost
during low power mode, and restore the clock.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20250224172101.3448398-1-fabrice.gasnier@foss.st.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
These changes lay the groundwork for adding support for guest kernels,
allowing them to leverage target CPU implementations provided by the
VMM.
No functional changes intended.
Suggested-by: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Sebastian Ott <sebott@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20250221140229.12588-2-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Introduce hv_curr_partition_type to store the partition type
as an enum.
Right now this is limited to guest or root partition, but there will
be other kinds in future and the enum is easily extensible.
Set up hv_curr_partition_type early in Hyper-V initialization with
hv_identify_partition_type(). hv_root_partition() just queries this
value, and shouldn't be called before that.
Making this check into a function sets the stage for adding a config
option to gate the compilation of root partition code. In particular,
hv_root_partition() can be stubbed out always be false if root
partition support isn't desired.
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1740167795-13296-3-git-send-email-nunodasneves@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1740167795-13296-3-git-send-email-nunodasneves@linux.microsoft.com>
In multi-cluster MIPS I6500 systems there is a GIC in each cluster,
each with its own counter. When a cluster powers up the counter will
be stopped, with the COUNTSTOP bit set in the GIC_CONFIG register.
In single cluster systems, it has been fine to clear COUNTSTOP once
in gic_clocksource_of_init() to start the counter. In multi-cluster
systems, this will only have started the counter in the boot cluster,
and any CPUs in other clusters will find their counter stopped which
will break the GIC clock_event_device.
Resolve this by having CPUs clear the COUNTSTOP bit when they come
online, using the existing gic_starting_cpu() CPU hotplug callback. This
will allow CPUs in secondary clusters to ensure that the cluster's GIC
counter is running as expected.
Signed-off-by: Paul Burton <paulburton@kernel.org>
Signed-off-by: Chao-ying Fu <cfu@wavecomp.com>
Signed-off-by: Dragan Mladjenovic <dragan.mladjenovic@syrmia.com>
Signed-off-by: Aleksandar Rikalo <arikalo@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
The jcore-aic irqchip does not have separate interrupt numbers reserved for
cpu-local vs global interrupts. Therefore the device drivers need to
request the given interrupt as per CPU interrupt.
69a9dcbd2d ("clocksource/drivers/jcore: Use request_percpu_irq()")
converted the clocksource driver over to request_percpu_irq(), but failed
to do add all the required changes, resulting in a failure to register PIT
interrupts.
Fix this by:
1) Explicitly mark the interrupt via irq_set_percpu_devid() in
jcore_pit_init().
2) Enable and disable the per CPU interrupt in the CPU hotplug callbacks.
3) Pass the correct per-cpu cookie to the irq handler by using
handle_percpu_devid_irq() instead of handle_percpu_irq() in
handle_jcore_irq().
[ tglx: Massage change log ]
Fixes: 69a9dcbd2d ("clocksource/drivers/jcore: Use request_percpu_irq()")
Signed-off-by: Artur Rojek <contact@artur-rojek.eu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Uros Bizjak <ubizjak@gmail.com>
Link: https://lore.kernel.org/all/20250216175545.35079-3-contact@artur-rojek.eu
Switch to using hvhdk.h everywhere in the kernel. This header
includes all the new Hyper-V headers in include/hyperv, which form a
superset of the definitions found in hyperv-tlfs.h.
This makes it easier to add new Hyper-V interfaces without being
restricted to those in the TLFS doc (reflected in hyperv-tlfs.h).
To be more consistent with the original Hyper-V code, the names of
some definitions are changed slightly. Update those where needed.
Update comments in mshyperv.h files to point to include/hyperv for
adding new definitions.
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Link: https://lore.kernel.org/r/1732577084-2122-5-git-send-email-nunodasneves@linux.microsoft.com
Link: https://lore.kernel.org/r/20250108222138.1623703-3-romank@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
read_hv_sched_clock_tsc() assumes that the Hyper-V clock counter is
bigger than the variable hv_sched_clock_offset, which is cached during
early boot, but depending on the timing this assumption may be false
when a hibernated VM starts again (the clock counter starts from 0
again) and is resuming back (Note: hv_init_tsc_clocksource() is not
called during hibernation/resume); consequently,
read_hv_sched_clock_tsc() may return a negative integer (which is
interpreted as a huge positive integer since the return type is u64)
and new kernel messages are prefixed with huge timestamps before
read_hv_sched_clock_tsc() grows big enough (which typically takes
several seconds).
Fix the issue by saving the Hyper-V clock counter just before the
suspend, and using it to correct the hv_sched_clock_offset in
resume. This makes hv tsc page based sched_clock continuous and ensures
that post resume, it starts from where it left off during suspend.
Override x86_platform.save_sched_clock_state and
x86_platform.restore_sched_clock_state routines to correct this as soon
as possible.
Note: if Invariant TSC is available, the issue doesn't happen because
1) we don't register read_hv_sched_clock_tsc() for sched clock:
See commit e5313f1c54 ("clocksource/drivers/hyper-v: Rework
clocksource and sched clock setup");
2) the common x86 code adjusts TSC similarly: see
__restore_processor_state() -> tsc_verify_tsc_adjust(true) and
x86_platform.restore_sched_clock_state().
Cc: stable@vger.kernel.org
Fixes: 1349401ff1 ("clocksource/drivers/hyper-v: Suspend/resume Hyper-V clocksource for hibernation")
Co-developed-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/20240917053917.76787-1-namjain@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20240917053917.76787-1-namjain@linux.microsoft.com>
The continual trickle of small conversion patches is grating on me, and
is really not helping. Just get rid of the 'remove_new' member
function, which is just an alias for the plain 'remove', and had a
comment to that effect:
/*
* .remove_new() is a relic from a prototype conversion of .remove().
* New drivers are supposed to implement .remove(). Once all drivers are
* converted to not use .remove_new any more, it will be dropped.
*/
This was just a tree-wide 'sed' script that replaced '.remove_new' with
'.remove', with some care taken to turn a subsequent tab into two tabs
to make things line up.
I did do some minimal manual whitespace adjustment for places that used
spaces to line things up.
Then I just removed the old (sic) .remove_new member function, and this
is the end result. No more unnecessary conversion noise.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The use of of_property_read_bool() for non-boolean properties is
deprecated in favor of of_property_present() when testing for property
presence.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20241104190505.272805-2-robh@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
In the function gxp_timer_init, the 'int' type cast in front of the
PTR_ERR() macro is redundant, thus remove it.
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20241107074619.2714-1-tangbin@cmss.chinamobile.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
of_find_compatible_node() increments the node's refcount, and it must be
decremented again with a call to of_node_put() when the pointer is no
longer required to avoid leaking the resource.
Instead of adding the missing calls to of_node_put() in all execution
paths, use the cleanup attribute for 'arm_timer' by means of the
__free() macro, which automatically calls of_node_put() when the
variable goes out of scope.
Fixes: 25de4ce5ed ("clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://lore.kernel.org/r/20241031-timer-ti-dm-systimer-of_node_put-v3-1-063ee822b73a@gmail.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
System Tick Counter is present on Ralink SoCs RT3352 and MT7620. This
driver has been in 'arch/mips/ralink' directory since the beggining of
Ralink architecture support. However, it can be moved into a more proper
place in 'drivers/clocksource'. Hence add it here adding also support for
compile test targets and reducing LOC in architecture code folder.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20241028203643.191268-2-sergio.paracuellos@gmail.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
In a multi-cluster MIPS system, there are multiple GICs - one in each
cluster - each of which has its independent counter. The counters in
each GIC are not synchronized in any way, so they can drift relative
to one another through the lifetime of the system. This is problematic
for a clock source which ought to be global.
Avoid problems by always accessing cluster 0's counter, using
cross-cluster register access. This adds overhead so it is applied only
on multi-cluster systems.
Signed-off-by: Paul Burton <paulburton@kernel.org>
Signed-off-by: Chao-ying Fu <cfu@wavecomp.com>
Signed-off-by: Dragan Mladjenovic <dragan.mladjenovic@syrmia.com>
Signed-off-by: Aleksandar Rikalo <arikalo@gmail.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20241019071037.145314-6-arikalo@gmail.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Some timers may not have an interrupt routed to the A53 GIC, but the
timer PWM functionality can still be used by Linux Kernel. Therefore,
do not fail probe if interrupt is not found and ti,timer-pwm exists.
Signed-off-by: Judith Mendez <jm@ti.com>
Link: https://lore.kernel.org/r/20241011175203.1040568-1-jm@ti.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The sp804 is currently only user selectable if COMPILE_TEST, this was
done by commit dfc82faad7 ("clocksource/drivers/sp804: Add
COMPILE_TEST to CONFIG_ARM_TIMER_SP804") in order to avoid it being
spuriously offered on platforms that won't have the hardware since it's
generally only seen on Arm based platforms. This config is overly
restrictive, while platforms that rely on the SP804 do select it in
their Kconfig there are others such as the Arm fast models which have a
SP804 available but currently unused by Linux. Relax the dependency to
allow it to be user selectable on arm and arm64 to avoid surprises and
in case someone comes up with a use for extra timer hardware.
Fixes: dfc82faad7 ("clocksource/drivers/sp804: Add COMPILE_TEST to CONFIG_ARM_TIMER_SP804")
Reported-by: Ross Burton <ross.burton@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20241001-arm64-vexpress-sp804-v3-1-0a2d3f7883e4@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
dw_apb_clockevent_pause(), dw_apb_clockevent_resume() and
dw_apb_clockevent_stop() have been unused since 2021's
commit 1b79fc4f2b ("x86/apb_timer: Remove driver for deprecated
platform")
Remove them.
(Some of the other clockevent functions are still called by
dw_apb_timer_of.c so I guess it is still in use?)
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://lore.kernel.org/r/20241025203101.241709-1-linux@treblig.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
- Use the topology information of number of packages for making the
decision about TSC trust instead of using the number of online nodes
which is not reflecting the real topology.
- Stop the PIT timer 0 when its not in use as to stop pointless emulation
in the VMM.
- Fix the PIT timer stop sequence for timer 0 so it truly stops both real
hardware and buggy VMM emulations.
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Merge tag 'x86-timers-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 timer updates from Thomas Gleixner:
- Use the topology information of number of packages for making the
decision about TSC trust instead of using the number of online nodes
which is not reflecting the real topology.
- Stop the PIT timer 0 when its not in use as to stop pointless
emulation in the VMM.
- Fix the PIT timer stop sequence for timer 0 so it truly stops both
real hardware and buggy VMM emulations.
* tag 'x86-timers-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/tsc: Check for sockets instead of CPUs to make code match comment
clockevents/drivers/i8253: Fix stop sequence for timer 0
x86/i8253: Disable PIT timer 0 when not in use
x86/tsc: Use topology_max_packages() to get package number
- Core:
- Overhaul of posix-timers in preparation of removing the
workaround for periodic timers which have signal delivery
ignored.
- Remove the historical extra jiffie in msleep()
msleep() adds an extra jiffie to the timeout value to ensure
minimal sleep time. The timer wheel ensures minimal sleep
time since the large rewrite to a non-cascading wheel, but the
extra jiffie in msleep() remained unnoticed. Remove it.
- Make the timer slack handling correct for realtime tasks.
The procfs interface is inconsistent and does neither reflect
reality nor conforms to the man page. Show the correct 0 slack
for real time tasks and enforce it at the core level instead of
having inconsistent individual checks in various timer setup
functions.
- The usual set of updates and enhancements all over the place.
- Drivers:
- Allow the ACPI PM timer to be turned off during suspend
- No new drivers
- The usual updates and enhancements in various drivers
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Merge tag 'timers-core-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"Core:
- Overhaul of posix-timers in preparation of removing the workaround
for periodic timers which have signal delivery ignored.
- Remove the historical extra jiffie in msleep()
msleep() adds an extra jiffie to the timeout value to ensure
minimal sleep time. The timer wheel ensures minimal sleep time
since the large rewrite to a non-cascading wheel, but the extra
jiffie in msleep() remained unnoticed. Remove it.
- Make the timer slack handling correct for realtime tasks.
The procfs interface is inconsistent and does neither reflect
reality nor conforms to the man page. Show the correct 0 slack for
real time tasks and enforce it at the core level instead of having
inconsistent individual checks in various timer setup functions.
- The usual set of updates and enhancements all over the place.
Drivers:
- Allow the ACPI PM timer to be turned off during suspend
- No new drivers
- The usual updates and enhancements in various drivers"
* tag 'timers-core-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (43 commits)
ntp: Make sure RTC is synchronized when time goes backwards
treewide: Fix wrong singular form of jiffies in comments
cpu: Use already existing usleep_range()
timers: Rename next_expiry_recalc() to be unique
platform/x86:intel/pmc: Fix comment for the pmc_core_acpi_pm_timer_suspend_resume function
clocksource/drivers/jcore: Use request_percpu_irq()
clocksource/drivers/cadence-ttc: Add missing clk_disable_unprepare in ttc_setup_clockevent
clocksource/drivers/asm9260: Add missing clk_disable_unprepare in asm9260_timer_init
clocksource/drivers/qcom: Add missing iounmap() on errors in msm_dt_timer_init()
clocksource/drivers/ingenic: Use devm_clk_get_enabled() helpers
platform/x86:intel/pmc: Enable the ACPI PM Timer to be turned off when suspended
clocksource: acpi_pm: Add external callback for suspend/resume
clocksource/drivers/arm_arch_timer: Using for_each_available_child_of_node_scoped()
dt-bindings: timer: rockchip: Add rk3576 compatible
timers: Annotate possible non critical data race of next_expiry
timers: Remove historical extra jiffie for timeout in msleep()
hrtimer: Use and report correct timerslack values for realtime tasks
hrtimer: Annotate hrtimer_cpu_base_.*_expiry() for sparse.
timers: Add sparse annotation for timer_sync_wait_running().
signal: Replace BUG_ON()s
...
