kernel/linux.git/include/clocksource/arm_arch_timer.h, branch v6.19.11

clocksource/drivers/arm_arch_timer_mmio: Switch over to standalone driver

2025-09-23T10:31:50+00:00

Remove all the MMIO support from the per-CPU timer driver, and switch over to the standalove driver. Signed-off-by: Marc Zyngier Signed-off-by: Daniel Lezcano Tested-by: Sudeep Holla Reviewed-by: Sudeep Holla Link: https://lore.kernel.org/r/20250814154622.10193-4-maz@kernel.org

KVM: arm64: nv: Sanitise CNTHCTL_EL2

2025-01-02T19:19:10+00:00

Inject some sanity in CNTHCTL_EL2, ensuring that we don't handle more than we advertise to the guest. Acked-by: Oliver Upton Link: https://lore.kernel.org/r/20241217142321.763801-11-maz@kernel.org Signed-off-by: Marc Zyngier

KVM: arm64: nv: Use FEAT_ECV to trap access to EL0 timers

2025-01-02T19:19:09+00:00

Although FEAT_NV2 makes most things fast, it also makes it impossible to correctly emulate the timers, as the sysreg accesses are redirected to memory. FEAT_ECV addresses this by giving a hypervisor the ability to trap the EL02 sysregs as well as the virtual timer. Add the required trap setting to make use of the feature, allowing us to elide the ugly resync in the middle of the run loop. Acked-by: Oliver Upton Link: https://lore.kernel.org/r/20241217142321.763801-5-maz@kernel.org Signed-off-by: Marc Zyngier

KVM: arm64: nv: Add handling of EL2-specific timer registers

2025-01-02T19:19:09+00:00

Add the required handling for EL2 and EL02 registers, as well as EL1 registers used in the E2H context. This includes handling the virtual timer accesses when CNTHCTL_EL2.EL1TVT or CNTHCTL_EL2.EL1TVCT are set. Acked-by: Oliver Upton Link: https://lore.kernel.org/r/20241217142321.763801-2-maz@kernel.org Signed-off-by: Marc Zyngier

KVM: arm64: timers: Use CNTPOFF_EL2 to offset the physical timer

2023-03-30T18:01:09+00:00

With ECV and CNTPOFF_EL2, it is very easy to offer an offset for the physical timer. So let's do just that. Nothing can set the offset yet, so this should have no effect whatsoever (famous last words...). Reviewed-by: Colton Lewis Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20230330174800.2677007-5-maz@kernel.org

clocksource/drivers/arm_arch_timer: Use event stream scaling when available

2022-03-07T17:27:22+00:00

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 Cc: Mark Rutland Cc: Daniel Lezcano Acked-by: Mark Rutland Link: https://lore.kernel.org/r/20220203170502.2694422-1-maz@kernel.org Signed-off-by: Daniel Lezcano

clocksource/drivers/arm_arch_timer: Remove any trace of the TVAL programming interface

2021-10-17T19:47:39+00:00

TVAL usage is now long gone, get rid of the leftovers. Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211017124225.3018098-11-maz@kernel.org Signed-off-by: Daniel Lezcano

clocksource/drivers/arm_arch_timer: Move system register timer programming over to CVAL

2021-10-17T19:47:05+00:00

In order to cope better with high frequency counters, move the programming of the timers from the countdown timer (TVAL) over to the comparator (CVAL). The programming model is slightly different, as we now need to read the current counter value to have an absolute deadline instead of a relative one. There is a small overhead to this change, which we will address in the following patches. Reviewed-by: Oliver Upton Reviewed-by: Mark Rutland Tested-by: Mark Rutland Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211017124225.3018098-5-maz@kernel.org Signed-off-by: Daniel Lezcano

arm64: arch_timer: Implement support for interrupt-names

2021-04-08T11:18:38+00:00

This allows the devicetree to correctly represent the available set of timers, which varies from device to device, without the need for fake dummy interrupts for unavailable slots. Also add the hyp-virt timer/PPI, which is not currently used, but worth representing. Reviewed-by: Tony Lindgren Reviewed-by: Linus Walleij Reviewed-by: Marc Zyngier Signed-off-by: Hector Martin

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234

2019-06-19T15:09:07+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Alexios Zavras Reviewed-by: Allison Randal Reviewed-by: Enrico Weigelt Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de Signed-off-by: Greg Kroah-Hartman