diff options
Diffstat (limited to 'debian/patches-rt/0290-KVM-arm-arm64-Let-the-timer-expire-in-hardirq-contex.patch')
| -rw-r--r-- | debian/patches-rt/0290-KVM-arm-arm64-Let-the-timer-expire-in-hardirq-contex.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/debian/patches-rt/0290-KVM-arm-arm64-Let-the-timer-expire-in-hardirq-contex.patch b/debian/patches-rt/0290-KVM-arm-arm64-Let-the-timer-expire-in-hardirq-contex.patch new file mode 100644 index 000000000..8ce7e3d98 --- /dev/null +++ b/debian/patches-rt/0290-KVM-arm-arm64-Let-the-timer-expire-in-hardirq-contex.patch @@ -0,0 +1,50 @@ +From: Thomas Gleixner <tglx@linutronix.de> +Date: Tue, 13 Aug 2019 14:29:41 +0200 +Subject: [PATCH 290/342] KVM: arm/arm64: Let the timer expire in hardirq + context on RT +Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=ee72e57437b6b664bd7784277353a5dfd529c67e + +[ Upstream commit 719cc080c914045a6e35787bf4dc3ba91cfd3efb ] + +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> +Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> +--- + virt/kvm/arm/arch_timer.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c +index 17cecc96f735..217d39f40393 100644 +--- a/virt/kvm/arm/arch_timer.c ++++ b/virt/kvm/arm/arch_timer.c +@@ -67,7 +67,7 @@ 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, struct work_struct *work) +@@ -638,10 +638,10 @@ void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) + vcpu_ptimer(vcpu)->cntvoff = 0; + + INIT_WORK(&timer->expired, kvm_timer_inject_irq_work); +- 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(&timer->phys_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); ++ hrtimer_init(&timer->phys_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD); + timer->phys_timer.function = kvm_phys_timer_expire; + + vtimer->irq.irq = default_vtimer_irq.irq; |