diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2019-08-13 14:29:41 +0200 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2019-08-16 17:02:30 +0200 |
| commit | 719cc080c914045a6e35787bf4dc3ba91cfd3efb (patch) | |
| tree | 606babc0135755fe0a0902687aa75ea05c148c3c /virt | |
| parent | 240610aa31094f51f299f06eb8dae8d4cd8d4500 (diff) | |
| download | linux-rt-719cc080c914045a6e35787bf4dc3ba91cfd3efb.tar.gz | |
KVM: arm/arm64: Let the timer expire in hardirq context on RT
The timers are canceled from an preempt-notifier which is invoked with
disabled preemption which is not allowed on PREEMPT_RT.
The timer callback is short so in could be invoked in hard-IRQ context
on -RT.
Let the timer expire on hard-IRQ context even on -RT.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <maz@kernel.org>
Tested-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/arch_timer.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c index 1be486d5d7cb..0bfa7c5b5c89 100644 --- a/virt/kvm/arm/arch_timer.c +++ b/virt/kvm/arm/arch_timer.c @@ -80,7 +80,7 @@ static inline bool userspace_irqchip(struct kvm *kvm) static void soft_timer_start(struct hrtimer *hrt, u64 ns) { hrtimer_start(hrt, ktime_add_ns(ktime_get(), ns), - HRTIMER_MODE_ABS); + HRTIMER_MODE_ABS_HARD); } static void soft_timer_cancel(struct hrtimer *hrt) @@ -697,11 +697,11 @@ void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) update_vtimer_cntvoff(vcpu, kvm_phys_timer_read()); ptimer->cntvoff = 0; - hrtimer_init(&timer->bg_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + hrtimer_init(&timer->bg_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD); timer->bg_timer.function = kvm_bg_timer_expire; - hrtimer_init(&vtimer->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); - hrtimer_init(&ptimer->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + hrtimer_init(&vtimer->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD); + hrtimer_init(&ptimer->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD); vtimer->hrtimer.function = kvm_hrtimer_expire; ptimer->hrtimer.function = kvm_hrtimer_expire; |