KVM: arm64: Remove evaluation of timer state in kvm_cpu_has_pending_timer()

Browse source

The vgic-v5 code added some evaluations of the timers in a helper funtion
(kvm_cpu_has_pending_timer()) that is called to determine whether
the vcpu can wake-up.

But looking at the timer there is wrong:

- we want to see timers that are signalling an interrupt to the
  vcpu, and not just that have a pending interrupt

- we already have kvm_arch_vcpu_runnable() that evaluates the
  state of interrupts

- kvm_cpu_has_pending_timer() really is about WFIT, as the timeout
  does not generate an interrupt, and is therefore distinct from
  the point above

As a consequence, revert these changes and teach vgic_v5_has_pending_ppi()
about checking for pending HW interrupts instead.

Fixes: 9491c63b6c ("KVM: arm64: gic-v5: Enlighten arch timer for GICv5")
Link: https://sashiko.dev/#/patchset/20260319154937.3619520-1-sascha.bischoff%40arm.com
Link: https://patch.msgid.link/20260401103611.357092-13-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

...

This commit is contained in:

Marc Zyngier 2026-04-01 11:36:07 +01:00

parent 8fe30434a8

commit fbcbf259d9

2 changed files with 3 additions and 7 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

arch/arm64/kvm/arch_timer.c

View file

4

arch/arm64/kvm/vgic/vgic-v5.c

View file