user/sven/linux.git/include/kvm/arm_arch_timer.h, branch v6.1.110

KVM: arm64: Simplify kvm_cpu_has_pending_timer()

2022-04-20T12:24:44Z

kvm_cpu_has_pending_timer() ends up checking all the possible timers for a wake-up cause. However, we already check for pending interrupts whenever we try to wake-up a vcpu, including the timer interrupts. Obviously, doing the same work twice is once too many. Reduce this helper to almost nothing, but keep it around, as we are going to make use of it soon. Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220419182755.601427-4-maz@kernel.org

KVM: arm64: timers: Move timer registers to the sys_regs file

2020-07-07T08:28:38Z

Move the timer gsisters to the sysreg file. This will further help when they are directly changed by a nesting hypervisor in the VNCR page. This requires moving the initialisation of the timer struct so that some of the helpers (such as arch_timer_ctx_index) can work correctly at an early stage. Signed-off-by: Marc Zyngier

KVM: arm64: timers: Rename kvm_timer_sync_hwstate to kvm_timer_sync_user

2020-07-07T08:28:38Z

kvm_timer_sync_hwstate() has nothing to do with the timer HW state, but more to do with the state of a userspace interrupt controller. Change the suffix from _hwstate to_user, in keeping with the rest of the code. Signed-off-by: Marc Zyngier

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333

2019-06-05T15:37:06Z

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 write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 136 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Alexios Zavras Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.384967451@linutronix.de Signed-off-by: Greg Kroah-Hartman

KVM: arm/arm64: Rework the timer code to use a timer_map

2019-02-19T21:05:43Z

We are currently emulating two timers in two different ways. When we add support for nested virtualization in the future, we are going to be emulating either two timers in two diffferent ways, or four timers in a single way. We need a unified data structure to keep track of how we map virtual state to physical state and we need to cleanup some of the timer code to operate more independently on a struct arch_timer_context instead of trying to consider the global state of the VCPU and recomputing all state. Co-written with Marc Zyngier Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall

KVM: arm/arm64: arch_timer: Assign the phys timer on VHE systems

2019-02-19T21:05:42Z

VHE systems don't have to emulate the physical timer, we can simply assign the EL1 physical timer directly to the VM as the host always uses the EL2 timers. In order to minimize the amount of cruft, AArch32 gets definitions for the physical timer too, but is should be generally unused on this architecture. Co-written with Marc Zyngier Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall

KVM: arm/arm64: timer: Rework data structures for multiple timers

2019-02-19T21:05:41Z

Prepare for having 4 timer data structures (2 for now). Move loaded to the cpu data structure and not the individual timer structure, in preparation for assigning the EL1 phys timer as well. Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier

KVM: arm/arm64: consolidate arch timer trap handlers

2019-02-19T21:05:40Z

At the moment we have separate system register emulation handlers for each timer register. Actually they are quite similar, and we rely on kvm_arm_timer_[gs]et_reg() for the actual emulation anyways, so let's just merge all of those handlers into one function, which just marshalls the arguments and then hands off to a set of common accessors. This makes extending the emulation to include EL2 timers much easier. Signed-off-by: Andre Przywara [Fixed 32-bit VM breakage and reduced to reworking existing code] Signed-off-by: Christoffer Dall [Fixed 32bit host, general cleanup] Signed-off-by: Marc Zyngier

KVM: arm/arm64: Simplify bg_timer programming

2019-02-19T21:05:36Z

Instead of calling into kvm_timer_[un]schedule from the main kvm blocking path, test if the VCPU is on the wait queue from the load/put path and perform the background timer setup/cancel in this path. This has the distinct advantage that we no longer race between load/put and schedule/unschedule and programming and canceling of the bg_timer always happens when the timer state is not loaded. Note that we must now remove the checks in kvm_timer_blocking that do not schedule a background timer if one of the timers can fire, because we no longer have a guarantee that kvm_vcpu_check_block() will be called before kvm_timer_blocking. Reported-by: Andre Przywara Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier

KVM: arm/arm64: Remove arch timer workqueue

2018-12-19T17:47:07Z

The use of a work queue in the hrtimer expire function for the bg_timer is a leftover from the time when we would inject interrupts when the bg_timer expired. Since we are no longer doing that, we can instead call kvm_vcpu_wake_up() directly from the hrtimer function and remove all workqueue functionality from the arch timer code. Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier