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32cf6d0ae0
linux/drivers/clocksource
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Daniel Lezcano 32cf6d0ae0 Merge branch 'timers/drivers/armv8.6_arch_timer' into timers/drivers/next 
The branch is a stable branch shared with ARM maintainers for the
first 13th patches of the series:

It is based on v5.14-rc3.

As stated by the changelog:

" [... ] enabling ARMv8.6 support for timer subsystem, and was prompted by a
discussion with Oliver around the fact that an ARMv8.6 implementation
must have a 1GHz counter, which leads to a number of things to break
in the timer code:

- the counter rollover can come pretty quickly as we only advertise a
  56bit counter,
- the maximum timer delta can be remarkably small, as we use the
  countdown interface which is limited to 32bit...

Thankfully, there is a way out: we can compute the minimal width of
the counter based on the guarantees that the architecture gives us,
and we can use the 64bit comparator interface instead of the countdown
to program the timer.

Finally, we start making use of the ARMv8.6 ECV features by switching
accesses to the counters to a self-synchronising register, removing
the need for an ISB. Hopefully, implementations will *not* just stick
an invisible ISB there...

A side effect of the switch to CVAL is that XGene-1 breaks. I have
added a workaround to keep it alive.

I have added Oliver's original patch[0] to the series and tweaked a
couple of things. Blame me if I broke anything.

The whole things has been tested on Juno (sysreg + MMIO timers),
XGene-1 (broken sysreg timers), FVP (FEAT_ECV, CNT*CTSS_EL0).
"

Link: https://lore.kernel.org/r/20211017124225.3018098-1-maz@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-10-19 10:07:28 +02:00
..
acpi_pm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 243 2019-06-19 17:09:07 +02:00
arc_timer.c clocksource/drivers/arc_timer: Eliminate redefined macro error 2021-10-16 22:15:01 +02:00
arm_arch_timer.c clocksource/drivers/arm_arch_timer: Fix masking for high freq counters 2021-10-18 09:20:02 +02:00
arm_global_timer.c clocksource/drivers/arm_global_timer: Remove duplicated argument in arm_global_timer 2021-06-16 17:33:04 +02:00
armv7m_systick.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
asm9260_timer.c clocksource/drivers/asm9260: Add a check for of_clk_get 2019-11-04 10:40:10 +01:00
bcm_kona_timer.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
bcm2835_timer.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
clksrc_st_lpc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
clksrc-dbx500-prcmu.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
clps711x-timer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dummy_timer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
dw_apb_timer_of.c clocksource/drivers/dw_apb_timer_of: Add handling for potential memory leak 2021-04-08 13:24:53 +02:00
dw_apb_timer.c clocksource: dw_apb_timer: Make CPU-affiliation being optional 2020-05-23 00:02:41 +02:00
em_sti.c clocksource/drivers/em_sti: Fix variable declaration in em_sti_probe 2020-01-16 19:06:57 +01:00
exynos_mct.c clocksource/drivers/exynos_mct: Mark MCT device as CLOCK_EVT_FEAT_PERCPU 2021-08-13 09:24:22 +02:00
h8300_timer8.c clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init() 2020-08-24 13:01:38 +02:00
h8300_timer16.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
h8300_tpu.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hyperv_timer.c clocksource/drivers/hyper-v: Re-enable VDSO_CLOCKMODE_HVCLOCK on X86 2021-05-14 14:55:13 +02:00
i8253.c clockevents/drivers/i8253: Add support for PIT shutdown quirk 2018-11-04 11:04:46 +01:00
ingenic-ost.c clocksource/drivers/ingenic_ost: Fix return value check in ingenic_ost_probe() 2021-04-08 13:24:15 +02:00
ingenic-sysost.c clocksource/drivers/ingenic: Use bitfield macro helpers 2021-08-14 02:44:35 +02:00
ingenic-timer.c clocksource/drivers/ingenic: Add support for the JZ4760 2021-04-08 13:23:22 +02:00
jcore-pit.c clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE 2017-06-14 11:58:45 +02:00
Kconfig This round has a diffstat dominated by Qualcomm clk drivers. Honestly though 2021-07-01 13:26:16 -07:00
Makefile clocksource/drivers/prima: Remove sirf prima driver 2021-02-03 09:13:46 +01:00
mips-gic-timer.c clocksource: mips-gic-timer: Mark GIC timer as unstable if ref clock changes 2020-05-23 00:03:16 +02:00
mmio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mps2-timer.c clocksource/drivers/mps2-timer: Use semicolons rather than commas to separate statements 2020-10-01 10:07:26 +02:00
mxs_timer.c clocksource/drivers/mxs_timer: Add missing semicolon when DEBUG is defined 2021-01-18 22:28:59 +01:00
nomadik-mtu.c clocksource/drivers/nomadik-mtu: Handle 32kHz clock 2020-07-23 16:57:43 +02:00
numachip.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
renesas-ostm.c clocksource/drivers/renesas-ostm: Use unique device name instead of ostm 2019-11-04 10:38:46 +01:00
samsung_pwm_timer.c clocksource/drivers/samsung_pwm: Constify source IO memory 2021-06-04 10:12:13 +02:00
scx200_hrt.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sh_cmt.c clocksource/drivers/sh_cmt: Fix wrong setting if don't request IRQ for clock source channel 2021-08-13 20:26:29 +02:00
sh_mtu2.c PM: domains: Rename pm_genpd_syscore_poweroff|poweron() 2020-11-10 20:42:01 +01:00
sh_tmu.c PM: domains: Rename pm_genpd_syscore_poweroff|poweron() 2020-11-10 20:42:01 +01:00
timer-armada-370-xp.c clocksource/drivers/armada-370-xp: Use semicolons rather than commas to separate statements 2020-10-02 16:27:28 +02:00
timer-atcpit100.c clocksource/drivers: Set clockevent device cpumask to cpu_possible_mask 2018-07-26 11:26:30 +02:00
timer-atmel-pit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
timer-atmel-st.c clocksource/drivers/atmel-st: Remove useless 'status' 2020-04-15 10:57:15 +02:00
timer-atmel-tcb.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
timer-cadence-ttc.c clocksource/drivers/cadence_ttc: Fix memory leak in ttc_setup_clockevent() 2020-12-03 19:16:26 +01:00
timer-clint.c clocksource: clint: Export clint_time_val for modules 2020-09-29 23:55:27 -07:00
timer-cs5535.c clocksource/drivers/timer-cs5535: Request irq with non-NULL dev_id 2020-03-12 19:23:06 +01:00
timer-davinci.c clocksource/drivers/davinci: Move pr_fmt() before the includes 2021-01-18 16:31:39 +01:00
timer-digicolor.c clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE 2017-06-14 11:58:45 +02:00
timer-fsl-ftm.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
timer-fttmr010.c clocksource/drivers/fttmr010: Pass around less pointers 2021-08-14 10:49:49 +02:00
timer-gx6605s.c clocksource/drivers/timer-gx6605s: Fixup counter reload 2020-08-24 13:01:39 +02:00
timer-imx-gpt.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-imx-sysctr.c clocksource/drivers/imx-sysctr: Remove unused includes 2020-03-17 10:11:45 +01:00
timer-imx-tpm.c clocksource/drivers/imx-tpm: Add support for ARM64 2020-04-09 16:24:50 +02:00
timer-integrator-ap.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-ixp4xx.c clocksource/drivers/ixp4xx: Implement delay timer 2019-06-25 19:49:18 +02:00
timer-keystone.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
timer-lpc32xx.c clocksource/drivers: Unify the names to timer-* format 2018-10-03 14:37:02 +02:00
timer-mediatek.c clocksource/drivers/mediatek: Optimize systimer irq clear flow on shutdown 2021-08-14 02:44:35 +02:00
timer-meson6.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-microchip-pit64b.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
timer-milbeaut.c clocksource/drivers/timer-milbeaut: Cleanup common register accesses 2019-05-02 21:55:58 +02:00
timer-mp-csky.c clocksource/drivers/c-sky: fixup ftrace call-graph panic 2018-12-31 23:17:23 +08:00
timer-npcm7xx.c clocksource/drivers/npcm: Add support for WPCM450 2021-04-08 13:24:16 +02:00
timer-of.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
timer-of.h clocksource/drivers/timer-of: Store the device node pointer in 'struct timer_of' 2018-01-08 17:57:24 +01:00
timer-orion.c clocksource/drivers/orion: Add missing clk_disable_unprepare() on error path 2020-12-03 19:16:26 +01:00
timer-owl.c clocksource/drivers/owl: Improve owl_timer_init fail messages 2020-02-27 09:42:00 +01:00
timer-oxnas-rps.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
timer-pistachio.c clocksource/drivers/pistachio: Fix trivial typo 2021-04-08 13:24:15 +02:00
timer-probe.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
timer-pxa.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-qcom.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
timer-rda.c clocksource/drivers/rda: Add clock driver for RDA8810PL SoC 2018-12-18 22:22:23 +01:00
timer-riscv.c RISC-V: Remove CLINT related code from timer and arch 2020-08-20 10:58:13 -07:00
timer-rockchip.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
timer-sp.h clocksource/drivers/sp804: Enable Hisilicon sp804 timer 64bit mode 2020-09-24 10:51:04 +02:00
timer-sp804.c clocksource/drivers/sp804: Use pr_fmt 2020-12-03 19:16:18 +01:00
timer-sprd.c clocksource/drivers/sprd: Register one always-on timer to compensate suspend time 2018-07-26 11:26:34 +02:00
timer-stm32-lp.c clocksource: Add Low Power STM32 timers driver 2020-06-18 11:19:58 +01:00
timer-stm32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
timer-sun4i.c clocksource: sun4i: Add missing compatibles 2019-08-27 00:31:39 +02:00
timer-sun5i.c clocksource/drivers/sun5i: Fail gracefully when clock rate is unavailable 2019-02-23 12:13:45 +01:00
timer-tegra.c clocksource/drivers/tegra: Set up maximum-ticks limit properly 2019-06-25 19:49:18 +02:00
timer-ti-32k.c clocksource/drivers: Replace HTTP links with HTTPS ones 2020-07-23 16:57:43 +02:00
timer-ti-dm-systimer.c clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940 2021-04-08 16:41:18 +02:00
timer-ti-dm.c clocksource/drivers/timer-ti-dm: Drop unnecessary restore 2021-06-16 17:33:04 +02:00
timer-versatile.c clocksource/drivers/timer-versatile: Clear OF_POPULATED flag 2020-05-23 00:03:25 +02:00
timer-vf-pit.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
timer-vt8500.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-zevio.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00