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KVM/arm/arm64/vgic-new: Convert to hotplug state machine

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Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Andre Przywara <andre.przywara@arm.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Eric Auger <eric.auger@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Cc: kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153337.900484868@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Anna-Maria Gleixner 2016-07-13 17:17:02 +00:00 committed by Ingo Molnar
parent 31487f8328
commit 15d7e3d349
2 changed files with 10 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/cpuhotplug.h
View File

@ -51,6 +51,7 @@ enum cpuhp_state {
CPUHP_AP_QCOM_TIMER_STARTING,
CPUHP_AP_MIPS_GIC_TIMER_STARTING,
CPUHP_AP_KVM_STARTING,
CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
CPUHP_AP_KVM_ARM_VGIC_STARTING,
CPUHP_AP_KVM_ARM_TIMER_STARTING,
CPUHP_AP_ARM_XEN_STARTING,

31
virt/kvm/arm/vgic/vgic-init.c
View File

@ -353,32 +353,19 @@ out:
/* GENERIC PROBE */
static void vgic_init_maintenance_interrupt(void *info)
static int vgic_init_cpu_starting(unsigned int cpu)
{
enable_percpu_irq(kvm_vgic_global_state.maint_irq, 0);
return 0;
}
static int vgic_cpu_notify(struct notifier_block *self,
unsigned long action, void *cpu)
static int vgic_init_cpu_dying(unsigned int cpu)
{
switch (action) {
case CPU_STARTING:
case CPU_STARTING_FROZEN:
vgic_init_maintenance_interrupt(NULL);
break;
case CPU_DYING:
case CPU_DYING_FROZEN:
disable_percpu_irq(kvm_vgic_global_state.maint_irq);
break;
}
return NOTIFY_OK;
disable_percpu_irq(kvm_vgic_global_state.maint_irq);
return 0;
}
static struct notifier_block vgic_cpu_nb = {
.notifier_call = vgic_cpu_notify,
};
static irqreturn_t vgic_maintenance_handler(int irq, void *data)
{
/*
@ -434,14 +421,14 @@ int kvm_vgic_hyp_init(void)
return ret;
}
ret = __register_cpu_notifier(&vgic_cpu_nb);
ret = cpuhp_setup_state(CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
"AP_KVM_ARM_VGIC_INIT_STARTING",
vgic_init_cpu_starting, vgic_init_cpu_dying);
if (ret) {
kvm_err("Cannot register vgic CPU notifier\n");
goto out_free_irq;
}
on_each_cpu(vgic_init_maintenance_interrupt, NULL, 1);
kvm_info("vgic interrupt IRQ%d\n", kvm_vgic_global_state.maint_irq);
return 0;